View PIC16HV610T-IST_4457135.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

PIC16F610/16HV610 PIC16F616/16HV616 Data Sheet
14-Pin, Flash-Based 8-Bit CMOS Microcontrollers
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C
Note the following details of the code protection feature on Microchip devices: * * Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable."
*
* *
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
DS41288C-page ii
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
14-Pin Flash-Based, 8-Bit CMOS Microcontrollers
High-Performance RISC CPU:
* Only 35 instructions to learn: - All single-cycle instructions except branches * Operating speed: - DC - 20 MHz oscillator/clock input - DC - 200 ns instruction cycle * Interrupt capability * 8-level deep hardware stack * Direct, Indirect and Relative Addressing modes
Peripheral Features:
* Shunt Voltage Regulator (PIC16HV610/616 only): - 5 volt regulation - 4 mA to 50 mA shunt range * 11 I/O pins and 1 input only - High current source/sink for direct LED drive - Interrupt-on-Change pins - Individually programmable weak pull-ups * Analog Comparator module with: - Two analog comparators - Programmable on-chip voltage reference (CVREF) module (% of VDD) - Fixed Voltage Reference - Comparator inputs and outputs externally accessible - SR Latch - Built-In Hysteresis (user selectable) * Timer0: 8-bit timer/counter with 8-bit programmable prescaler * Enhanced Timer1: - 16-bit timer/counter with prescaler - External Timer1 Gate (count enable) - Option to use OSC1 and OSC2 in LP mode as Timer1 oscillator if INTOSC mode selected - Timer1 oscillator * In-Circuit Serial ProgrammingTM (ICSPTM) via two pins
Special Microcontroller Features:
* Precision Internal Oscillator: - Factory calibrated to 1%, typical - User selectable frequency: 4 MHz or 8 MHz * Power-Saving Sleep mode * Voltage range: - PIC16F610/616: 2.0V to 5.5V - PIC16HV610/616: 2.0V to user defined maximum (see note) * Industrial and Extended Temperature range * Power-on Reset (POR) * Power-up Timer (PWRT) and Oscillator Start-up Timer (OST) * Brown-out Reset (BOR) * Watchdog Timer (WDT) with independent oscillator for reliable operation * Multiplexed Master Clear with pull-up/input pin * Programmable code protection * High Endurance Flash: - 100,000 write Flash endurance - Flash retention: > 40 years
PIC16F616/16HV616 only:
* A/D Converter: - 10-bit resolution - 8 external input channels - 2 internal reference channels * Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler * Enhanced Capture, Compare, PWM module: - 16-bit Capture, max. resolution 12.5 ns - 16-bit Compare, max. resolution 200 ns - 10-bit PWM with 1, 2 or 4 output channels, programmable "dead time", max. frequency 20 kHz
Low-Power Features:
* Standby Current: - 50 nA @ 2.0V, typical * Operating Current: - 20 A @ 32 kHz, 2.0V, typical - 220 A @ 4 MHz, 2.0V, typical * Watchdog Timer Current: - 1 A @ 2.0V, typical Note: Voltage across internal shunt regulator cannot exceed 5V.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 1
PIC16F610/616/16HV610/616
Program Memory Device PIC16F610 PIC16HV610 PIC16F616 PIC16HV616 Flash (words) 1024 1024 2048 2048 Data Memory I/O SRAM (bytes) 64 64 128 128 11 11 11 11 10-bit A/D (ch) -- -- 8 8 Timers 8/16-bit 1/1 1/1 2/1 2/1
Comparators 2 2 2 2
Voltage Range 2.0-5.5V 2.0-user defined 2.0-5.5V 2.0-user defined
PIC16F610/16HV610 14-Pin Diagram (PDIP, SOIC, TSSOP)
VDD RA5/T1CKI/OSC1/CLKIN RA4/T1G/OSC2/CLKOUT RA3/MCLR/VPP RC5 RC4/C2OUT RC3/C12IN3-
1 PIC16F610/16HV610 2 3 4 5 6 7
14 13 12 11 10 9 8
VSS RA0/C1IN+/ICSPDAT RA1/C12IN0-/ICSPCLK RA2/T0CKI/INT/C1OUT RC0/C2IN+ RC1/C12IN1RC2/C12IN2-
TABLE 1:
I/O RA0 RA1 RA2 RA3(1) RA4 RA5 RC0 RC1 RC2 RC3 RC4 RC5 -- -- Note 1: 2: Pin 13 12 11 4 3 2 10 9 8 7 6 5 1 14
PIC16F610/16HV610 14-PIN SUMMARY
Comparators C1IN+ C12IN0C1OUT -- -- -- C2IN+ C12IN1C12IN2C12IN3C2OUT -- -- -- Timer -- -- T0CKI -- T1G T1CKI -- -- -- -- -- -- -- -- Interrupts IOC IOC INT/IOC IOC IOC IOC -- -- -- -- -- -- -- -- Pull-ups Y Y Y Y(2) Y Y -- -- -- -- -- -- -- -- Basic ICSPDAT ICSPCLK -- MCLR/VPP OSC2/CLKOUT OSC1/CLKIN -- -- -- -- -- -- VDD VSS
Input only. Only when pin is configured for external MCLR.
DS41288C-page 2
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
PIC16F616/16HV616 14-Pin Diagram (PDIP, SOIC, TSSOP)
VDD RA5/T1CKI/OSC1/CLKIN RA4/AN3/T1G/OSC2/CLKOUT RA3/MCLR/VPP RC5/CCP1/P1A RC4/C2OUT/P1B RC3/AN7/C12IN3-/P1C
1 PIC16F616/16HV616 2 3 4 5 6 7
14 13 12 11 10 9 8
VSS RA0/AN0/C1IN+/ICSPDAT RA1/AN1/C12IN0-/VREF/ICSPCLK RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN+ RC1/AN5/C12IN1RC2/AN6/C12IN2-/P1D
TABLE 2:
I/O RA0 RA1 RA2 RA3(1) RA4 RA5 RC0 RC1 RC2 RC3 RC4 RC5 -- -- Note 1: 2: Pin 13 12 11 4 3 2 10 9 8 7 6 5 1 14
PIC16F616/16HV616 14-PIN SUMMARY
Analog AN0 AN1/VREF AN2 -- AN3 -- AN4 AN5 AN6 AN7 -- -- -- -- Comparators C1IN+ C12IN0C1OUT -- -- -- C2IN+ C12IN1C12IN2C12IN3C2OUT -- -- -- Timer -- -- T0CKI -- T1G T1CKI -- -- -- -- -- -- -- -- CCP -- -- -- -- -- -- -- -- P1D P1C P1B CCP1/P1A -- -- Interrupts IOC IOC INT/IOC IOC IOC IOC -- -- -- -- -- -- -- -- Pull-ups Y Y Y Y(2) Y Y -- -- -- -- -- -- -- -- Basic ICSPDAT ICSPCLK -- MCLR/VPP OSC2/CLKOUT OSC1/CLKIN -- -- -- -- -- -- VDD VSS
Input only. Only when pin is configured for external MCLR.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 3
PIC16F610/616/16HV610/616
PIC16F610/16HV610 16-Pin Diagram (QFN)
VDD VSS 13 NC 15 NC 14
RA5/T1CKI/OSC1/CLKIN RA4/T1G/OSC2/CLKOUT RA3/MCLR/VPP RC5
16
1 2 3 4 5 6 7 PIC16F610/ PIC16HV610
12 11 10 9 8
RA0/C1IN+/ICSPDAT RA1/C12IN0-/ICSPCLK RA2/T0CKI/INT/C1OUT RC0/C2IN1+
RC4/C2OUT
RC3/C12IN3-
RC2/C12IN2-
TABLE 3:
I/O RA0 RA1 RA2 RA3 RA4 RA5 RC0 RC1 RC2 RC3 RC4 RC5 -- -- Note 1: 2:
(1)
PIC16F610/16HV610 16-PIN SUMMARY
Pin 12 11 10 3 2 1 9 8 7 6 5 4 16 13 Comparators C1IN+ C12IN0C1OUT -- -- -- C2IN+ C12IN1C12IN2C12IN3C2OUT -- -- -- Timers -- -- T0CKI -- T1G T1CKI -- -- -- -- -- -- -- -- Interrupts IOC IOC INT/IOC IOC IOC IOC -- -- -- -- -- -- -- -- Pull-ups Y Y Y Y(2) Y Y -- -- -- -- -- -- -- -- Basic ICSPDAT ICSPCLK -- MCLR/VPP OSC2/CLKOUT OSC1/CLKIN -- -- -- -- -- -- VDD VSS
Input only. Only when pin is configured for external MCLR.
DS41288C-page 4
Preliminary
RC1/C12IN1-
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
PIC16F616/16HV616 16-Pin Diagram (QFN)
VDD VSS 13 NC 15 NC 14
RA5/T1CKI/OSC1/CLKIN RA4/AN3/T1G/OSC2/CLKOUT RA3/MCLR/VPP RC5/CCP/P1A
16
1 2 3 4 5 6 7 PIC16F616/ PIC16HV616
12 11 10 9 8
RA0/AN0/C1IN+/ICSPDAT RA1/AN1/C12IN0-/VREF/ICSPCLK RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN1+
RC3/AN7/C12IN3-/P1C
RC2/AN6/C12IN2-/P1D
RC4/C2OUT/P1B
TABLE 4:
I/O RA0 RA1 RA2 RA3 RA4 RA5 RC0 RC1 RC2 RC3 RC4 RC5 -- -- Note 1: 2:
(1)
PIC16F616/16HV616 16-PIN SUMMARY
Analog AN0 AN1/VREF AN2 -- AN3 -- AN4 AN5 AN6 AN7 -- -- -- -- Comparators C1IN+ C12IN0C1OUT -- -- -- C2IN+ C12IN1C12IN2C12IN3C2OUT -- -- -- Timers -- -- T0CKI -- T1G T1CKI -- -- -- -- -- -- -- -- CCP -- -- -- -- -- -- -- -- P1D P1C P1B CCP1/P1A -- -- Interrupts IOC IOC INT/IOC IOC IOC IOC -- -- -- -- -- -- -- -- Pull-ups Y Y Y Y(2) Y Y -- -- -- -- -- -- -- -- Basic ICSPDAT ICSPCLK -- MCLR/VPP OSC2/CLKOUT OSC1/CLKIN -- -- -- -- -- -- VDD VSS
Pin 12 11 10 3 2 1 9 8 7 6 5 4 16 13
Input only. Only when pin is configured for external MCLR.
(c) 2007 Microchip Technology Inc.
Preliminary
RC1/AN5/C12IN1-
DS41288C-page 5
PIC16F610/616/16HV610/616
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 7 2.0 Memory Organization ................................................................................................................................................................. 11 3.0 Oscillator Module........................................................................................................................................................................ 25 4.0 I/O Ports ..................................................................................................................................................................................... 31 5.0 Timer0 Module ........................................................................................................................................................................... 43 6.0 Timer1 Module with Gate Control............................................................................................................................................... 47 7.0 Timer2 Module ........................................................................................................................................................................... 53 8.0 Comparator Module.................................................................................................................................................................... 55 9.0 Analog-to-Digital Converter (ADC) Module ................................................................................................................................ 71 10.0 Enhanced Capture/Compare/PWM (With Auto-Shutdown and Dead Band) Module ................................................................. 83 11.0 Voltage Regulator..................................................................................................................................................................... 105 12.0 Special Features of the CPU .................................................................................................................................................... 106 13.0 Instruction Set Summary .......................................................................................................................................................... 125 14.0 Development Support............................................................................................................................................................... 135 15.0 Electrical Specifications............................................................................................................................................................ 139 16.0 DC and AC Characteristics Graphs and Tables ....................................................................................................................... 161 17.0 Packaging Information.............................................................................................................................................................. 163 Appendix A: Data Sheet Revision History.......................................................................................................................................... 169 Appendix B: Migrating from other PIC(R) Devices................................................................................................................................ 169 Index .................................................................................................................................................................................................. 171 The Microchip Web Site ..................................................................................................................................................................... 175 Customer Change Notification Service .............................................................................................................................................. 175 Customer Support .............................................................................................................................................................................. 175 Reader Response .............................................................................................................................................................................. 176 Product Identification System............................................................................................................................................................. 177
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors@microchip.com or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: http://www.microchip.com You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page. The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision of silicon and revision of document to which it applies. To determine if an errata sheet exists for a particular device, please check with one of the following:
* Microchip's Worldwide Web site; http://www.microchip.com * Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.
DS41288C-page 6
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
1.0 DEVICE OVERVIEW
The PIC16F610/616/16HV610/616 is covered by this data sheet. It is available in 14-pin PDIP, SOIC, TSSOP and 16-pin QFN packages. Block Diagrams and pinout descriptions of the devices are as follows: * PIC16F610/16HV610 (Figure 1-1, Table 1-1) * PIC16F616/16HV616 (Figure 1-2, Table 1-2)
FIGURE 1-1:
PIC16F610/16HV610 BLOCK DIAGRAM
INT Configuration 13 Program Counter Flash 1K X 14 Program Memory Data Bus 8 PORTA
8-Level Stack (13-Bit)
RAM 64 Bytes File Registers RAM Addr 9 PORTC
Program Bus
RA0 RA1 RA2 RA3 RA4 RA5
14 Instruction Reg Direct Addr 7
Addr MUX 8 Indirect Addr
FSR Reg STATUS Reg 8 3
RC0 RC1 RC2 RC3 RC4 RC5
Power-up Timer Instruction Decode and Control Timing Generation Oscillator Start-up Timer Power-on Reset Watchdog Timer Brown-out Reset 8
MUX
ALU
OSC1/CLKIN OSC2/CLKOUT
W Reg
Internal Oscillator Block MCLR VDD T1G T1CKI Timer0 T0CKI Timer1 VSS
Shunt Regulator (PIC16HV610 only)
Comparator Voltage Reference Fixed Voltage Reference
2 Analog Comparators
C1IN+ C12IN0C12IN1C12IN2C12IN3C1OUT C2IN+ C2OUT
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 7
PIC16F610/616/16HV610/616
FIGURE 1-2: PIC16F616/16HV616 BLOCK DIAGRAM
INT Configuration 13 Program Counter Flash 2K X 14 Program Memory Data Bus 8 PORTA
8-Level Stack (13-Bit)
RAM 128 Bytes File Registers RAM Addr 9 PORTC
Program Bus
RA0 RA1 RA2 RA3 RA4 RA5
14 Instruction Reg Direct Addr 7
Addr MUX 8 Indirect Addr
FSR Reg STATUS Reg 8 3
RC0 RC1 RC2 RC3 RC4 RC5
Power-up Timer Instruction Decode and Control Timing Generation Oscillator Start-up Timer Power-on Reset Watchdog Timer Brown-out Reset 8
MUX
ALU
OSC1/CLKIN OSC2/CLKOUT
W Reg
Internal Oscillator Block T1G T1CKI Timer0 T0CKI Timer1 MCLR VDD VSS
Shunt Regulator (PIC16HV616 only)
Timer2
Comparator Voltage Reference Analog-To-Digital Converter Fixed Voltage Reference
2 Analog Comparators
ECCP
C1IN+ C12IN0C12IN1C12IN2C12IN3C1OUT C2IN+ C2OUT
AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7
CCP1/P1A P1B P1C P1D
DS41288C-page 8
VREF
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 1-1: PIC16F610/16HV610 PINOUT DESCRIPTION
Name
RA0/C1IN+/ICSPDAT
Function
RA0 C1IN+ ICSPDAT
Input Type
TTL AN ST TTL AN ST ST ST ST -- TTL ST HV TTL ST -- -- TTL ST XTAL ST TTL AN TTL AN TTL AN TTL AN TTL -- TTL Power Power
Output Type
CMOS -- CMOS CMOS -- -- CMOS -- -- CMOS -- -- -- CMOS -- XTAL CMOS CMOS -- -- -- CMOS -- CMOS -- CMOS -- CMOS -- CMOS CMOS CMOS -- --
Description
PORTA I/O with prog. pull-up and interrupt-on-change Comparator C1 non-inverting input Serial Programming Data I/O PORTA I/O with prog. pull-up and interrupt-on-change Comparators C1 and C2 inverting input Serial Programming Clock PORTA I/O with prog. pull-up and interrupt-on-change Timer0 clock input External Interrupt Comparator C1 output PORTA input with interrupt-on-change Master Clear w/internal pull-up Programming voltage PORTA I/O with prog. pull-up and interrupt-on-change Timer1 gate (count enable) Crystal/Resonator FOSC/4 output PORTA I/O with prog. pull-up and interrupt-on-change Timer1 clock input Crystal/Resonator External clock input/RC oscillator connection PORTC I/O Comparator C2 non-inverting input PORTC I/O Comparators C1 and C2 inverting input PORTC I/O Comparators C1 and C2 inverting input PORTC I/O Comparators C1 and C2 inverting input PORTC I/O Comparator C2 output PORTC I/O Positive supply Ground reference HV = High Voltage XTAL = Crystal
RA1/C12IN0-/ICSPCLK
RA1 C12IN0ICSPCLK
RA2/T0CKI/INT/C1OUT
RA2 T0CKI INT C1OUT
RA3/MCLR/VPP
RA3 MCLR VPP
RA4/T1G/OSC2/CLKOUT
RA4 T1G OSC2 CLKOUT
RA5/T1CKI/OSC1/CLKIN
RA5 T1CKI OSC1 CLKIN
RC0/C2IN+ RC1/C12IN1RC2/C12IN2RC3/C12IN3RC4/C2OUT RC5 VDD VSS Legend:
RC0 C2IN+ RC1 C12IN1RC2 C12IN2RC3 C12IN3RC4 C2OUT RC5 VDD VSS AN = Analog input or output ST = Schmitt Trigger input with CMOS levels
CMOS = CMOS compatible input or output TTL = TTL compatible input
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 9
PIC16F610/616/16HV610/616
TABLE 1-2: PIC16F616/16HV616 PINOUT DESCRIPTION
Name
RA0/AN0/C1IN+/ICSPDAT
Function
RA0 AN0 C1IN+ ICSPDAT
Input Type
TTL AN AN ST TTL AN AN AN ST ST AN ST ST -- TTL ST HV TTL AN ST -- -- TTL ST XTAL ST TTL AN AN TTL AN AN TTL AN AN -- TTL AN AN -- TTL -- -- TTL ST -- Power Power
Output Type
CMOS -- -- CMOS CMOS -- -- -- -- CMOS -- -- -- CMOS -- -- -- CMOS -- -- XTAL CMOS CMOS -- -- -- CMOS -- -- CMOS -- -- CMOS -- -- CMOS CMOS -- -- CMOS CMOS CMOS CMOS CMOS CMOS CMOS -- -- A/D Channel 0 input
Description
PORTA I/O with prog. pull-up and interrupt-on-change Comparator C1 non-inverting input Serial Programming Data I/O PORTA I/O with prog. pull-up and interrupt-on-change A/D Channel 1 input Comparators C1 and C2 inverting input External Voltage Reference for A/D Serial Programming Clock PORTA I/O with prog. pull-up and interrupt-on-change A/D Channel 2 input Timer0 clock input External Interrupt Comparator C1 output PORTA input with interrupt-on-change Master Clear w/internal pull-up Programming voltage PORTA I/O with prog. pull-up and interrupt-on-change A/D Channel 3 input Timer1 gate (count enable) Crystal/Resonator FOSC/4 output PORTA I/O with prog. pull-up and interrupt-on-change Timer1 clock input Crystal/Resonator External clock input/RC oscillator connection PORTC I/O A/D Channel 4 input Comparator C2 non-inverting input PORTC I/O A/D Channel 5 input Comparators C1 and C2 inverting input PORTC I/O A/D Channel 6 input Comparators C1 and C2 inverting input PWM output PORTC I/O A/D Channel 7 input Comparators C1 and C2 inverting input PWM output PORTC I/O Comparator C2 output PWM output PORTC I/O Capture input/Compare output PWM output Positive supply Ground reference HV = High Voltage XTAL = Crystal
RA1/AN1/C12IN0-/VREF/ICSPCLK
RA1 AN1 C12IN0VREF ICSPCLK
RA2/AN2/T0CKI/INT/C1OUT
RA2 AN2 T0CKI INT C1OUT
RA3/MCLR/VPP
RA3 MCLR VPP
RA4/AN3/T1G/OSC2/CLKOUT
RA4 AN3 T1G OSC2 CLKOUT
RA5/T1CKI/OSC1/CLKIN
RA5 T1CKI OSC1 CLKIN
RC0/AN4/C2IN+
RC0 AN4 C2IN+
RC1/AN5/C12IN1-
RC1 AN5 C12IN1-
RC2/AN6/C12IN2-/P1D
RC2 AN6 C12IN2P1D
RC3/AN7/C12IN3-/P1C
RC3 AN7 C12IN3P1C
RC4/C2OUT/P1B
RC4 C2OUT P1B
RC5/CCP1/P1A
RC5 CCP1 P1A
VDD VSS Legend:
VDD VSS AN = Analog input or output ST = Schmitt Trigger input with CMOS levels
CMOS = CMOS compatible input or output TTL = TTL compatible input
DS41288C-page 10
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
2.0
2.1
MEMORY ORGANIZATION
Program Memory Organization
FIGURE 2-2:
PROGRAM MEMORY MAP AND STACK FOR THE PIC16F616/16HV616
PC<12:0>
The PIC16F610/616/16HV610/616 has a 13-bit program counter capable of addressing an 8k x 14 program memory space. Only the first 1K x 14 (0000h-3FF) for the PIC16F610/16HV610 and the first 2K x 14 (0000h-07FFh) for the PIC16F616/16HV616 is physically implemented. Accessing a location above these boundaries will cause a wraparound within the first 1K x 14 space (PIC16F610/16HV610) and 2K x 14 space (PIC16F616/16HV616). The Reset vector is at 0000h and the interrupt vector is at 0004h (see Figure 2-1).
CALL, RETURN RETFIE, RETLW
13
Stack Level 1 Stack Level 2
Stack Level 8 Reset Vector
0000h
FIGURE 2-1:
PROGRAM MEMORY MAP AND STACK FOR THE PIC16F610/16HV610
PC<12:0>
Interrupt Vector
0004h 0005h
CALL, RETURN RETFIE, RETLW
13
On-chip Program Memory 07FFh
Stack Level 1 Stack Level 2
0800h
Stack Level 8 Reset Vector
1FFFh
0000h
Interrupt Vector
0004h 0005h
On-chip Program Memory 03FFh 0400h
1FFFh
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 11
PIC16F610/616/16HV610/616
2.2 Data Memory Organization
2.2.1
The data memory (see Figure 2-4) is partitioned into two banks, which contain the General Purpose Registers (GPR) and the Special Function Registers (SFR). The Special Function Registers are located in the first 32 locations of each bank. PIC16F610/16HV610 Register locations 40h-7Fh in Bank 0 are General Purpose Registers, implemented as static RAM. PIC16F616/16HV616 Register locations 20h-7Fh in Bank 0 and A0h-BFh in Bank 1 are General Purpose Registers, implemented as static RAM. Register locations F0h-FFh in Bank 1 point to addresses 70h-7Fh in Bank 0. All other RAM is unimplemented and returns `0' when read. The RP0 bit of the STATUS register is the bank select bit. RP0 0 1 Bank 0 is selected Bank 1 is selected
GENERAL PURPOSE REGISTER FILE
The register file is organized as 64 x 8 in the PIC16F610/16HV610 and 128 x 8 in the PIC16F616/16HV616. Each register is accessed, either directly or indirectly, through the File Select Register (FSR) (see Section 2.4 "Indirect Addressing, INDF and FSR Registers").
2.2.2
SPECIAL FUNCTION REGISTERS
The Special Function Registers are registers used by the CPU and peripheral functions for controlling the desired operation of the device (see Table 2-1). These registers are static RAM. The special registers can be classified into two sets: core and peripheral. The Special Function Registers associated with the "core" are described in this section. Those related to the operation of the peripheral features are described in the section of that peripheral feature.
Note:
The IRP and RP1 bits of the STATUS register are reserved and should always be maintained as `0's.
DS41288C-page 12
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 2-3: DATA MEMORY MAP OF THE PIC16F610/16HV610
File Address Indirect Addr.(1) TMR0 PCL STATUS FSR PORTA PORTC 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h PCLATH INTCON PIR1 TMR1L TMR1H T1CON 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 18h VRCON CM1CON0 CM2CON0 CM2CON1 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h SRCON0 SRCON1 WPUA IOCA OSCTUNE ANSEL PCON PCLATH INTCON PIE1 TRISC Indirect Addr.(1) OPTION_REG PCL STATUS FSR TRISA File Address 80h 81h 82h 83h 84h 85h 86h 87h 88h 89h 8Ah 8Bh 8Ch 8Dh 8Eh 8Fh 90h 91h 92h 93h 94h 95h 96h 97h 98h 99h 9Ah 9Bh 9Ch 9Dh 9Eh 9Fh A0h ADRESH ADCON0 VRCON CM1CON0 CM2CON0 CM2CON1 TMR1L TMR1H T1CON TMR2 T2CON CCPR1L CCPR1H CCP1CON PWM1CON ECCPAS PCLATH INTCON PIR1 PORTC Indirect Addr.(1) TMR0 PCL STATUS FSR PORTA
FIGURE 2-4:
DATA MEMORY MAP OF THE PIC16F616/16HV616
File Address 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h ADRESL ADCON1 General Purpose Registers 32 Bytes SRCON0 SRCON1 WPUA IOCA OSCTUNE ANSEL PR2 PCON PCLATH INTCON PIE1 TRISC Indirect Addr.(1) OPTION_REG PCL STATUS FSR TRISA File Address 80h 81h 82h 83h 84h 85h 86h 87h 88h 89h 8Ah 8Bh 8Ch 8Dh 8Eh 8Fh 90h 91h 92h 93h 94h 95h 96h 97h 98h 99h 9Ah 9Bh 9Ch 9Dh 9Eh 9Fh A0h
3Fh 40h
General Purpose Registers 96 Bytes
BFh C0h
General Purpose Registers 64 Bytes 6Fh Accesses 70h-7Fh 7Fh Bank 0 Bank 1 F0h FFh Bank 0 70h 7Fh Bank 1 Accesses 70h-7Fh F0h FFh
Unimplemented data memory locations, read as `0'. Note 1: Not a physical register.
Unimplemented data memory locations, read as `0'. Note 1: Not a physical register.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 13
PIC16F610/616/16HV610/616
TABLE 2-1:
Addr Bank 0 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh INDF TMR0 PCL STATUS FSR PORTA -- PORTC -- -- PCLATH INTCON PIR1 -- TMR1L TMR1H T1CON TMR2(2) T2CON(2) CCPR1L(2) CCPR1H(2) CCP1CON(2) PWM1CON(2) ECCPAS(2) -- VRCON CM1CON0 CM2CON0 CM2CON1 -- ADRESH(2) ADCON0(2) Addressing this location uses contents of FSR to address data memory (not a physical register) Timer0 Module's Register Program Counter's (PC) Least Significant Byte IRP(1) RP1(1) RP0 TO PD Z DC C xxxx xxxx xxxx xxxx 0000 0000 0001 1xxx xxxx xxxx RA4 RA3 RA2 RA1 RA0 --x0 x000 -- -- RC5 RC4 RC3 RC2 RC1 RC0 --xx 00xx -- -- -- PEIE ADIF(2) -- T0IE CCP1IF(2) Write Buffer for upper 5 bits of Program Counter INTE C2IF RAIE C1IF T0IF -- INTF TMR2IF(2) RAIF TMR1IF ---0 0000 0000 0000 -000 0-00 -- xxxx xxxx xxxx xxxx TMR1CS TMR1ON 0000 0000 0000 0000 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 XXXX XXXX XXXX XXXX CCP1M3 PDC3 PSSAC1 CCP1M2 PDC2 PSSAC0 CCP1M1 PDC1 PSSBD1 CCP1M0 PDC0 PSSBD0 0000 0000 0000 0000 22, 113 43, 113 22, 113 16, 113 22, 113 31, 113 -- 40, 113 -- -- 22, 113 18, 113 20, 113 -- 47, 113 47, 113 50, 113 53, 113 54, 113 84, 113 84, 113 83, 113 83, 113 Name
PIC16F610/616/16HV610/616 SPECIAL FUNCTION REGISTERS SUMMARY BANK 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR, BOR Page
Indirect Data Memory Address Pointer -- Unimplemented -- Unimplemented Unimplemented -- GIE -- -- RA5
Unimplemented Holding Register for the Least Significant Byte of the 16-bit TMR1 Register Holding Register for the Most Significant Byte of the 16-bit TMR1 Register T1GINV TMR1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC
Timer2 Module Register -- TOUTPS3
Capture/Compare/PWM Register 1 Low Byte Capture/Compare/PWM Register 1 High Byte P1M1 PRSEN P1M0 PDC6 DC1B1 PDC5 ECCPAS1 DC1B0 PDC4 ECCPAS0
ECCPASE ECCPAS2 Unimplemented C1VREN C1ON C2ON MC1OUT C2VREN C1OUT C2OUT MC2OUT
0000 0000 100, 113 -- -- 70, 113 60, 113 61, 113 63, 113 -- 78, 113 76, 113
VRR C1OE C2OE --
FVREN C1POL C2POL T1ACS
VR3 -- -- C1HYS
VR2 C1R C2R C2HYS
VR1 C1CH1 C2CH1 T1GSS
VR0 C1CH0 C2CH0 C2SYNC
0000 0000 0000 -000 0000 -000 00-0 0010 -- xxxx xxxx
Unimplemented Most Significant 8 bits of the left shifted A/D result or 2 bits of right shifted result ADFM VCFG CHS3 CHS2 CHS1 CHS0 GO/DONE ADON
0000 0000
Legend: Note 1: 2:
- = Unimplemented locations read as `0', u = unchanged, x = unknown, q = value depends on condition, shaded = unimplemented IRP and RP1 bits are reserved, always maintain these bits clear. PIC16F616/16HV616 only.
DS41288C-page 14
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 2-2:
Addr Bank 1 80h 81h 82h 83h 84h 85h 86h 87h 88h 89h 8Ah 8Bh 8Ch 8Dh 8Eh 8Fh 90h 91h 92h 93h 94h 95h 96h 97h 98h 99h 9Ah 9Bh 9Ch 9Dh 9Eh 9Fh INDF OPTION_REG PCL STATUS FSR TRISA -- TRISC -- -- PCLATH INTCON PIE1 -- PCON -- OSCTUNE ANSEL PR2(3) -- -- WPUA IOCA -- -- SRCON0 SRCON1 -- -- -- ADRESL(3) ADCON1(3) Addressing this location uses contents of FSR to address data memory (not a physical register) RAPU IRP(1) INTEDG RP1(1) T0CS T0SE PSA PS2 PS1 PS0 xxxx xxxx 22, 113 1111 1111 17, 113 0000 0000 22, 113 PD Z DC C 0001 1xxx 16, 113 xxxx xxxx 22, 113 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 --11 1111 31, 113 -- -- TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 -- Name
PIC16F610/616/16HV610/616 SPECIAL FUNCTION REGISTERS SUMMARY BANK 1
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR, BOR Page
Program Counter's (PC) Least Significant Byte RP0 TO
Indirect Data Memory Address Pointer -- Unimplemented -- Unimplemented Unimplemented -- GIE -- -- PEIE ADIE(3) -- T0IE CCP1IE(3) Write Buffer for upper 5 bits of Program Counter INTE C2IE RAIE C1IE T0IF -- INTF TMR2IE(3) RAIF TMR1IE -- TRISA5
--11 1111 40, 113 -- -- -- --
---0 0000 22, 113 0000 0000 18, 113 -000 0-00 19, 113 -- --
Unimplemented -- Unimplemented -- ANS7 -- ANS6 -- ANS5 TUN4 ANS4 TUN3 ANS3(3) TUN2 ANS2(3) TUN1 ANS1 TUN0 ANS0 -- -- -- -- -- POR BOR
---- --qq 21, 113 -- --
---0 0000 29, 113 1111 1111 32, 114 1111 1111 53, 114 -- -- -- --
Timer2 Module Period Register Unimplemented Unimplemented -- -- Unimplemented Unimplemented SR1 SRCS1 SR0 SRCS0 C1SEN -- C2REN -- PULSS -- PULSR -- -- -- -- -- WPUA5 IOCA5 WPUA4 IOCA4 -- IOCA3 WPUA2 IOCA2 WPUA1 IOCA1 WPUA0 IOCA0
--11 -111 33, 114 --00 0000 33, 114 -- -- -- --
SRCLKEN 0000 00-0 67, 114 -- 00-- ---- 67, 114 -- -- -- -- -- --
Unimplemented Unimplemented Unimplemented Least Significant 2 bits of the left shifted result or 8 bits of the right shifted result -- ADCS2 ADCS1 ADCS0 -- -- -- --
xxxx xxxx 78, 114 -000 ---- 77, 114
Legend: Note 1: 2: 3:
- = Unimplemented locations read as `0', u = unchanged, x = unknown, q = value depends on condition, shaded = unimplemented IRP and RP1 bits are reserved, always maintain these bits clear. RA3 pull-up is enabled when MCLRE is `1' in the Configuration Word register. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 15
PIC16F610/616/16HV610/616
2.2.2.1 STATUS Register
The STATUS register, shown in Register 2-1, contains: * the arithmetic status of the ALU * the Reset status * the bank select bits for data memory (RAM) The STATUS register can be the destination for any instruction, like any other register. If the STATUS register is the destination for an instruction that affects the Z, DC or C bits, then the write to these three bits is disabled. These bits are set or cleared according to the device logic. Furthermore, the TO and PD bits are not writable. Therefore, the result of an instruction with the STATUS register as destination may be different than intended. For example, CLRF STATUS, will clear the upper three bits and set the Z bit. This leaves the STATUS register as `000u u1uu' (where u = unchanged). It is recommended, therefore, that only BCF, BSF, SWAPF and MOVWF instructions are used to alter the STATUS register, because these instructions do not affect any Status bits. For other instructions not affecting any Status bits, see the Section 13.0 "Instruction Set Summary". Note 1: Bits IRP and RP1 of the STATUS register are not used by the PIC16F610/616/16HV610/616 and should be maintained as clear. Use of these bits is not recommended, since this may affect upward compatibility with future products. 2: The C and DC bits operate as a Borrow and Digit Borrow out bit, respectively, in subtraction. See the SUBLW and SUBWF instructions for examples.
REGISTER 2-1:
Reserved IRP bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6 bit 5
STATUS: STATUS REGISTER
Reserved RP1 R/W-0 RP0 R-1 TO R-1 PD R/W-x Z R/W-x DC R/W-x C bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
IRP: This bit is reserved and should be maintained as `0' RP1: This bit is reserved and should be maintained as `0' RP0: Register Bank Select bit (used for direct addressing) 1 = Bank 1 (80h - FFh) 0 = Bank 0 (00h - 7Fh) TO: Time-out bit 1 = After power-up, CLRWDT instruction or SLEEP instruction 0 = A WDT time-out occurred PD: Power-down bit 1 = After power-up or by the CLRWDT instruction 0 = By execution of the SLEEP instruction Z: Zero bit 1 = The result of an arithmetic or logic operation is zero 0 = The result of an arithmetic or logic operation is not zero DC: Digit Carry/Borrow bit (ADDWF, ADDLW,SUBLW,SUBWF instructions), For Borrow, the polarity is reversed. 1 = A carry-out from the 4th low-order bit of the result occurred 0 = No carry-out from the 4th low-order bit of the result C: Carry/Borrow bit(1) (ADDWF, ADDLW, SUBLW, SUBWF instructions) 1 = A carry-out from the Most Significant bit of the result occurred 0 = No carry-out from the Most Significant bit of the result occurred For Borrow, the polarity is reversed. A subtraction is executed by adding the two's complement of the second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high-order or low-order bit of the source register.
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
DS41288C-page 16
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
2.2.2.2 OPTION Register
Note: To achieve a 1:1 prescaler assignment for Timer0, assign the prescaler to the WDT by setting PSA bit to `1' of the OPTION register. See Section 5.1.3 "Software Programmable Prescaler". The OPTION register is a readable and writable register, which contains various control bits to configure: * * * * Timer0/WDT prescaler External RA2/INT interrupt Timer0 Weak pull-ups on PORTA
REGISTER 2-2:
R/W-1 RAPU bit 7 Legend: R = Readable bit -n = Value at POR bit 7
OPTION_REG: OPTION REGISTER
R/W-1 INTEDG R/W-1 T0CS R/W-1 T0SE R/W-1 PSA R/W-1 PS2 R/W-1 PS1 R/W-1 PS0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
RAPU: PORTA Pull-up Enable bit 1 = PORTA pull-ups are disabled 0 = PORTA pull-ups are enabled by individual PORT latch values INTEDG: Interrupt Edge Select bit 1 = Interrupt on rising edge of RA2/INT pin 0 = Interrupt on falling edge of RA2/INT pin T0CS: Timer0 Clock Source Select bit 1 = Transition on RA2/T0CKI pin 0 = Internal instruction cycle clock (FOSC/4) T0SE: Timer0 Source Edge Select bit 1 = Increment on high-to-low transition on RA2/T0CKI pin 0 = Increment on low-to-high transition on RA2/T0CKI pin PSA: Prescaler Assignment bit 1 = Prescaler is assigned to the WDT 0 = Prescaler is assigned to the Timer0 module PS<2:0>: Prescaler Rate Select bits
BIT VALUE 000 001 010 011 100 101 110 111 TIMER0 RATE WDT RATE 1:2 1:4 1:8 1 : 16 1 : 32 1 : 64 1 : 128 1 : 256 1:1 1:2 1:4 1:8 1 : 16 1 : 32 1 : 64 1 : 128
bit 6
bit 5
bit 4
bit 3
bit 2-0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 17
PIC16F610/616/16HV610/616
2.2.2.3 INTCON Register
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state of its corresponding enable bit or the global enable bit, GIE of the INTCON register. User software should ensure the appropriate interrupt flag bits are clear prior to enabling an interrupt. The INTCON register is a readable and writable register, which contains the various enable and flag bits for TMR0 register overflow, PORTA change and external RA2/INT pin interrupts.
REGISTER 2-3:
R/W-0 GIE bit 7 Legend: R = Readable bit -n = Value at POR bit 7
INTCON: INTERRUPT CONTROL REGISTER
R/W-0 PEIE R/W-0 T0IE R/W-0 INTE R/W-0 RAIE R/W-0 T0IF R/W-0 INTF R/W-0 RAIF bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
GIE: Global Interrupt Enable bit 1 = Enables all unmasked interrupts 0 = Disables all interrupts PEIE: Peripheral Interrupt Enable bit 1 = Enables all unmasked peripheral interrupts 0 = Disables all peripheral interrupts T0IE: Timer0 Overflow Interrupt Enable bit 1 = Enables the Timer0 interrupt 0 = Disables the Timer0 interrupt INTE: RA2/INT External Interrupt Enable bit 1 = Enables the RA2/INT external interrupt 0 = Disables the RA2/INT external interrupt RAIE: PORTA Change Interrupt Enable bit(1) 1 = Enables the PORTA change interrupt 0 = Disables the PORTA change interrupt T0IF: Timer0 Overflow Interrupt Flag bit(2) 1 = Timer0 register has overflowed (must be cleared in software) 0 = Timer0 register did not overflow INTF: RA2/INT External Interrupt Flag bit 1 = The RA2/INT external interrupt occurred (must be cleared in software) 0 = The RA2/INT external interrupt did not occur RAIF: PORTA Change Interrupt Flag bit 1 = When at least one of the PORTA <5:0> pins changed state (must be cleared in software) 0 = None of the PORTA <5:0> pins have changed state IOCA register must also be enabled. T0IF bit is set when TMR0 rolls over. TMR0 is unchanged on Reset and should be initialized before clearing T0IF bit.
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1: 2:
DS41288C-page 18
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
2.2.2.4 PIE1 Register
Note: Bit PEIE of the INTCON register must be set to enable any peripheral interrupt. The PIE1 register contains the peripheral interrupt enable bits, as shown in Register 2-4.
REGISTER 2-4:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6
PIE1: PERIPHERAL INTERRUPT ENABLE REGISTER 1
R/W-0 ADIE
(1)
R/W-0 CCP1IE
(1)
R/W-0 C2IE
R/W-0 C1IE
U-0 --
R/W-0 TMR2IE
(1)
R/W-0 TMR1IE bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' ADIE: A/D Converter (ADC) Interrupt Enable bit(1) 1 = Enables the ADC interrupt 0 = Disables the ADC interrupt CCP1IE: CCP1 Interrupt Enable bit(1) 1 = Enables the CCP1 interrupt 0 = Disables the CCP1 interrupt C2IE: Comparator C2 Interrupt Enable bit 1 = Enables the Comparator C2 interrupt 0 = Disables the Comparator C2 interrupt C1IE: Comparator C1 Interrupt Enable bit 1 = Enables the Comparator C1 interrupt 0 = Disables the Comparator C1 interrupt Unimplemented: Read as `0' TMR2IE: Timer2 to PR2 Match Interrupt Enable bit(1) 1 = Enables the Timer2 to PR2 match interrupt 0 = Disables the Timer2 to PR2 match interrupt TMR1IE: Timer1 Overflow Interrupt Enable bit 1 = Enables the Timer1 overflow interrupt 0 = Disables the Timer1 overflow interrupt PIC16F616/16HV616 only. PIC16F610/16HV610 unimplemented, read as `0'.
bit 5
bit 4
bit 3
bit 2 bit 1
bit 0
Note 1:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 19
PIC16F610/616/16HV610/616
2.2.2.5 PIR1 Register
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state of its corresponding enable bit or the global enable bit, GIE of the INTCON register. User software should ensure the appropriate interrupt flag bits are clear prior to enabling an interrupt. The PIR1 register contains the peripheral interrupt flag bits, as shown in Register 2-5.
REGISTER 2-5:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6
PIR1: PERIPHERAL INTERRUPT REQUEST REGISTER 1
R/W-0 ADIF
(1)
R/W-0 CCP1IF
(1)
R/W-0 C2IF
R/W-0 C1IF
U-0 --
R/W-0 TMR2IF
(1)
R/W-0 TMR1IF bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' ADIF: A/D Interrupt Flag bit(1) 1 = A/D conversion complete 0 = A/D conversion has not completed or has not been started CCP1IF: CCP1 Interrupt Flag bit(1) Capture mode: 1 = A TMR1 register capture occurred (must be cleared in software) 0 = No TMR1 register capture occurred Compare mode: 1 = A TMR1 register compare match occurred (must be cleared in software) 0 = No TMR1 register compare match occurred PWM mode: Unused in this mode C2IF: Comparator C2 Interrupt Flag bit 1 = Comparator C2 output has changed (must be cleared in software) 0 = Comparator C2 output has not changed C1IF: Comparator C1 Interrupt Flag bit 1 = Comparator C1 output has changed (must be cleared in software) 0 = Comparator C1 output has not changed Unimplemented: Read as `0' TMR2IF: Timer2 to PR2 Match Interrupt Flag bit(1) 1 = Timer2 to PR2 match occurred (must be cleared in software) 0 = Timer2 to PR2 match has not occurred TMR1IF: Timer1 Overflow Interrupt Flag bit 1 = Timer1 register overflowed (must be cleared in software) 0 = Timer1 has not overflowed PIC16F616/16HV616 only. PIC16F610/16HV610 unimplemented, read as `0'.
bit 5
bit 4
bit 3
bit 2 bit 1
bit 0
Note 1:
DS41288C-page 20
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
2.2.2.6 PCON Register
The Power Control (PCON) register (see Table 12-2) contains flag bits to differentiate between a: * * * * Power-on Reset (POR) Brown-out Reset (BOR) Watchdog Timer Reset (WDT) External MCLR Reset
The PCON register also controls the software enable of the BOR. The PCON register bits are shown in Register 2-6.
REGISTER 2-6:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-2 bit 1
PCON: POWER CONTROL REGISTER
U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 POR R/W-0(1) BOR bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' POR: Power-on Reset Status bit 1 = No Power-on Reset occurred 0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs) BOR: Brown-out Reset Status bit 1 = No Brown-out Reset occurred 0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs) Reads as `0' if Brown-out Reset is disabled.
bit 0
Note 1:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 21
PIC16F610/616/16HV610/616
2.3 PCL and PCLATH
2.3.2 STACK
The Program Counter (PC) is 13 bits wide. The low byte comes from the PCL register, which is a readable and writable register. The high byte (PC<12:8>) is not directly readable or writable and comes from PCLATH. On any Reset, the PC is cleared. Figure 2-5 shows the two situations for the loading of the PC. The upper example in Figure 2-5 shows how the PC is loaded on a write to PCL (PCLATH<4:0> PCH). The lower example in Figure 2-5 shows how the PC is loaded during a CALL or GOTO instruction (PCLATH<4:3> PCH). The PIC16F610/616/16HV610/616 Family has an 8-level x 13-bit wide hardware stack (see Figure 2-1). The stack space is not part of either program or data space and the Stack Pointer is not readable or writable. The PC is PUSHed onto the stack when a CALL instruction is executed or an interrupt causes a branch. The stack is POPed in the event of a RETURN, RETLW or a RETFIE instruction execution. PCLATH is not affected by a PUSH or POP operation. The stack operates as a circular buffer. This means that after the stack has been PUSHed eight times, the ninth push overwrites the value that was stored from the first push. The tenth push overwrites the second push (and so on). Note 1: There are no Status bits to indicate stack overflow or stack underflow conditions. 2: There are no instructions/mnemonics called PUSH or POP. These are actions that occur from the execution of the CALL, RETURN, RETLW and RETFIE instructions or the vectoring to an interrupt address.
FIGURE 2-5:
PCH 12 PC 5 8 7
LOADING OF PC IN DIFFERENT SITUATIONS
PCL 0 Instruction with PCL as Destination ALU Result
PCLATH<4:0>
8
PCLATH PCH 12 PC 2 PCLATH<4:3> 11 OPCODE <10:0> PCLATH 11 10 8 7 PCL 0 GOTO, CALL
2.4
Indirect Addressing, INDF and FSR Registers
The INDF register is not a physical register. Addressing the INDF register will cause indirect addressing. Indirect addressing is possible by using the INDF register. Any instruction using the INDF register actually accesses data pointed to by the File Select Register (FSR). Reading INDF itself indirectly will produce 00h. Writing to the INDF register indirectly results in a no operation (although Status bits may be affected). An effective 9-bit address is obtained by concatenating the 8-bit FSR and the IRP bit of the STATUS register, as shown in Figure 2-7. A simple program to clear RAM location 40h-4Fh using indirect addressing is shown in Example 2-1.
2.3.1
MODIFYING PCL
Executing any instruction with the PCL register as the destination simultaneously causes the Program Counter PC<12:8> bits (PCH) to be replaced by the contents of the PCLATH register. This allows the entire contents of the program counter to be changed by writing the desired upper 5 bits to the PCLATH register. When the lower 8 bits are written to the PCL register, all 13 bits of the program counter will change to the values contained in the PCLATH register and those being written to the PCL register. A computed GOTO is accomplished by adding an offset to the program counter (ADDWF PCL). Care should be exercised when jumping into a look-up table or program branch table (computed GOTO) by modifying the PCL register. Assuming that PCLATH is set to the table start address, if the table length is greater than 255 instructions or if the lower 8 bits of the memory address rolls over from 0xFF to 0x00 in the middle of the table, then PCLATH must be incremented for each address rollover that occurs between the table beginning and the target location within the table. For more information refer to Application Note AN556, "Implementing a Table Read" (DS00556).
EXAMPLE 2-1:
MOVLW MOVWF NEXT CLRF INCF BTFSS GOTO CONTINUE
INDIRECT ADDRESSING
0x40 FSR INDF FSR, F FSR,4 NEXT ;initialize pointer ;to RAM ;clear INDF register ;inc pointer ;all done? ;no clear next ;yes continue
DS41288C-page 22
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 2-6:
RP1(1) RP0
DIRECT/INDIRECT ADDRESSING PIC16F610/16HV610
Direct Addressing 6 From Opcode 0 IRP(1) Indirect Addressing 7 File Select Register 0
Bank Select
Location Select 00 00h 01 10 11
Bank Select 180h
Location Select
Data Memory
20h 40h 70h 7Fh Bank 0 Bank 1
NOT USED(2)
1FFh Bank 2 Bank 3
For memory map detail, see Figure 2-3. Unimplemented data memory locations, read as `0'. Note 1: 2: The RP1 and IRP bits are reserved; always maintain these bits clear. Accesses in Bank 2 and Bank 3 are mirrored back into Bank 0 and Bank 1, respectively.
FIGURE 2-7:
DIRECT/INDIRECT ADDRESSING PIC16F616/16HV616
Direct Addressing Indirect Addressing 0 IRP(1) 7 File Select Register 0
RP1(1)
RP0
6
From Opcode
Bank Select
Location Select 00 00h 01 10 11
Bank Select 180h
Location Select
Data Memory 40h 70h 7Fh Bank 0 For memory map detail, see Figure 2-4. Unimplemented data memory locations, read as `0'. Note 1: 2: Bank 1
NOT USED(2)
1FFh Bank 2 Bank 3
The RP1 and IRP bits are reserved; always maintain these bits clear. Accesses in Bank 2 and Bank 3 are mirrored back into Bank 0 and Bank 1, respectively.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 23
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 24
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
3.0
3.1
OSCILLATOR MODULE
Overview
The Oscillator module can be configured in one of eight clock modes. 1. 2. 3. 4. 5. 6. 7. 8. EC - External clock with I/O on OSC2/CLKOUT. LP - 32 kHz Low-Power Crystal mode. XT - Medium Gain Crystal or Ceramic Resonator Oscillator mode. HS - High Gain Crystal or Ceramic Resonator mode. RC - External Resistor-Capacitor (RC) with FOSC/4 output on OSC2/CLKOUT. RCIO - External Resistor-Capacitor (RC) with I/O on OSC2/CLKOUT. INTOSC - Internal oscillator with FOSC/4 output on OSC2 and I/O on OSC1/CLKIN. INTOSCIO - Internal oscillator with I/O on OSC1/CLKIN and OSC2/CLKOUT.
The Oscillator module has a wide variety of clock sources and selection features that allow it to be used in a wide range of applications while maximizing performance and minimizing power consumption. Figure 3-1 illustrates a block diagram of the Oscillator module. Clock sources can be configured from external oscillators, quartz crystal resonators, ceramic resonators and Resistor-Capacitor (RC) circuits. In addition, the system clock source can be configured with a choice of two selectable speeds: internal or external system clock source.
Clock Source modes are configured by the FOSC<2:0> bits in the Configuration Word register (CONFIG). The Internal Oscillator module provides a selectable system clock mode of either 4 MHz (Postscaler) or 8 MHz (INTOSC).
FIGURE 3-1:
PIC(R) MCU CLOCK SOURCE BLOCK DIAGRAM
External Oscillator OSC2 Sleep OSC1
FOSC<2:0> IOSCFS (Configuration Word Register)
LP, XT, HS, RC, RCIO, EC MUX
INTOSC Internal Oscillator
System Clock (CPU and Peripherals)
INTOSC 8 MHz
Postscaler 4 MHz
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 25
PIC16F610/616/16HV610/616
3.2 Clock Source Modes
3.3.2
Clock Source modes can be classified as external or internal. * External Clock modes rely on external circuitry for the clock source. Examples are: Oscillator modules (EC mode), quartz crystal resonators or ceramic resonators (LP, XT and HS modes) and Resistor-Capacitor (RC) mode circuits. * Internal clock sources are contained internally within the Oscillator module. The Oscillator module has two selectable clock frequencies: 4 MHz and 8 MHz The system clock can be selected between external or internal clock sources via the FOSC<2:0> bits of the Configuration Word register.
OSCILLATOR START-UP TIMER (OST)
If the Oscillator module is configured for LP, XT or HS modes, the Oscillator Start-up Timer (OST) counts 1024 oscillations from OSC1. This occurs following a Power-on Reset (POR) and when the Power-up Timer (PWRT) has expired (if configured), or a wake-up from Sleep. During this time, the program counter does not increment and program execution is suspended. The OST ensures that the oscillator circuit, using a quartz crystal resonator or ceramic resonator, has started and is providing a stable system clock to the Oscillator module. When switching between clock sources, a delay is required to allow the new clock to stabilize. These oscillator delays are shown in Table 3-1.
3.3
3.3.1
External Clock Modes
EC MODE
The External Clock (EC) mode allows an externally generated logic level as the system clock source. When operating in this mode, an external clock source is connected to the OSC1 input and the OSC2 is available for general purpose I/O. Figure 3-2 shows the pin connections for EC mode. The Oscillator Start-up Timer (OST) is disabled when EC mode is selected. Therefore, there is no delay in operation after a Power-on Reset (POR) or wake-up from Sleep. Because the PIC(R) MCU design is fully static, stopping the external clock input will have the effect of halting the device while leaving all data intact. Upon restarting the external clock, the device will resume operation as if no time had elapsed.
FIGURE 3-2:
EXTERNAL CLOCK (EC) MODE OPERATION
OSC1/CLKIN PIC(R) MCU I/O OSC2/CLKOUT(1)
Clock from Ext. System
Note 1:
Alternate pin functions are listed in the Section 1.0 "Device Overview".
TABLE 3-1:
Switch From Sleep/POR Sleep/POR Sleep/POR
OSCILLATOR DELAY EXAMPLES
Switch To INTOSC EC, RC LP, XT, HS Frequency 4 MHz to 8 MHz DC - 20 MHz 32 kHz to 20 MHz Oscillator Delay Oscillator Warm-Up Delay (TWARM) 2 Instruction Cycles 1024 Clock Cycles (OST)
DS41288C-page 26
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
3.3.3 LP, XT, HS MODES
The LP, XT and HS modes support the use of quartz crystal resonators or ceramic resonators connected to OSC1 and OSC2 (Figure 3-3). The mode selects a low, medium or high gain setting of the internal inverteramplifier to support various resonator types and speed. LP Oscillator mode selects the lowest gain setting of the internal inverter-amplifier. LP mode current consumption is the least of the three modes. This mode is designed to drive only 32.768 kHz tuning-fork type crystals (watch crystals). XT Oscillator mode selects the intermediate gain setting of the internal inverter-amplifier. XT mode current consumption is the medium of the three modes. This mode is best suited to drive resonators with a medium drive level specification. HS Oscillator mode selects the highest gain setting of the internal inverter-amplifier. HS mode current consumption is the highest of the three modes. This mode is best suited for resonators that require a high drive setting. Figure 3-3 and Figure 3-4 show typical circuits for quartz crystal and ceramic resonators, respectively. Note 1: Quartz crystal characteristics vary according to type, package and manufacturer. The user should consult the manufacturer data sheets for specifications and recommended application. 2: Always verify oscillator performance over the VDD and temperature range that is expected for the application. 3: For oscillator design assistance, reference the following Microchip Applications Notes: * AN826, "Crystal Oscillator Basics and Crystal Selection for rfPIC(R) and PIC(R) Devices" (DS00826) * AN849, "Basic PIC(R) Oscillator Design" (DS00849) * AN943, "Practical PIC(R) Oscillator Analysis and Design" (DS00943) * AN949, "Making Your Oscillator Work" (DS00949)
FIGURE 3-4:
CERAMIC RESONATOR OPERATION (XT OR HS MODE)
PIC(R) MCU
OSC1/CLKIN
FIGURE 3-3:
QUARTZ CRYSTAL OPERATION (LP, XT OR HS MODE)
PIC(R) MCU
OSC1/CLKIN C1
To Internal Logic RP(3) RF(2) Sleep
C1 Quartz Crystal
To Internal Logic RF(2) Sleep C2 Ceramic RS(1) Resonator OSC2/CLKOUT
C2
RS(1)
OSC2/CLKOUT
Note 1:
A series resistor (RS) may be required for ceramic resonators with low drive level.
Note 1: 2:
A series resistor (RS) may be required for quartz crystals with low drive level. The value of RF varies with the Oscillator mode selected (typically between 2 M to 10 M).
2: The value of RF varies with the Oscillator mode selected (typically between 2 M to 10 M). 3: An additional parallel feedback resistor (RP) may be required for proper ceramic resonator operation.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 27
PIC16F610/616/16HV610/616
3.3.4 EXTERNAL RC MODES
3.4
Internal Clock Modes
The external Resistor-Capacitor (RC) modes support the use of an external RC circuit. This allows the designer maximum flexibility in frequency choice while keeping costs to a minimum when clock accuracy is not required. There are two modes: RC and RCIO. In RC mode, the RC circuit connects to OSC1. OSC2/ CLKOUT outputs the RC oscillator frequency divided by 4. This signal may be used to provide a clock for external circuitry, synchronization, calibration, test or other application requirements. Figure 3-5 shows the external RC mode connections.
The Oscillator module provides a selectable system clock source of either 4 MHz or 8 MHz. The selectable frequency is configured through the IOSCFS bit of the Configuration Word. The frequency of the internal oscillator can be can be user-adjusted via software using the OSCTUNE register.
3.4.1
INTOSC AND INTOSCIO MODES
FIGURE 3-5:
VDD REXT
EXTERNAL RC MODES
PIC(R) MCU
The INTOSC and INTOSCIO modes configure the internal oscillators as the system clock source when the device is programmed using the oscillator selection or the FOSC<2:0> bits in the Configuration Word register (CONFIG). See Section 12.0 "Special Features of the CPU" for more information. In INTOSC mode, OSC1/CLKIN is available for general purpose I/O. OSC2/CLKOUT outputs the selected internal oscillator frequency divided by 4. The CLKOUT signal may be used to provide a clock for external circuitry, synchronization, calibration, test or other application requirements. In INTOSCIO mode, OSC1/CLKIN and OSC2/CLKOUT are available for general purpose I/O.
OSC1/CLKIN CEXT VSS FOSC/4 or I/O(2) OSC2/CLKOUT(1)
Internal Clock
Recommended values: 10 k REXT 100 k, <3V 3 k REXT 100 k, 3-5V CEXT > 20 pF, 2-5V Note 1: 2: Alternate pin functions are listed in Section 1.0 "Device Overview". Output depends upon RC or RCIO Clock mode.
In RCIO mode, the RC circuit is connected to OSC1. OSC2 becomes an additional general purpose I/O pin. The RC oscillator frequency is a function of the supply voltage, the resistor (REXT) and capacitor (CEXT) values and the operating temperature. Other factors affecting the oscillator frequency are: * threshold voltage variation * component tolerances * packaging variations in capacitance The user also needs to take into account variation due to tolerance of external RC components used.
DS41288C-page 28
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
3.4.1.1 OSCTUNE Register
The oscillator is factory calibrated but can be adjusted in software by writing to the OSCTUNE register (Register 3-1). The default value of the OSCTUNE register is `0'. The value is a 5-bit two's complement number. When the OSCTUNE register is modified, the frequency will begin shifting to the new frequency. Code execution continues during this shift. There is no indication that the shift has occurred.
REGISTER 3-1:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-5 bit 4-0
OSCTUNE: OSCILLATOR TUNING REGISTER
U-0 -- U-0 -- R/W-0 TUN4 R/W-0 TUN3 R/W-0 TUN2 R/W-0 TUN1 R/W-0 TUN0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' TUN<4:0>: Frequency Tuning bits 01111 = Maximum frequency 01110 = * * * 00001 = 00000 = Oscillator module is running at the manufacturer calibrated frequency. 11111 = * * * 10000 = Minimum frequency
TABLE 3-2:
Name CONFIG(2) OSCTUNE Legend: Note 1: 2:
SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
Bit 7 IOSCFS -- Bit 6 CP -- Bit 5 MCLRE -- Bit 4 PWRTE TUN4 Bit 3 WDTE TUN3 Bit 2 FOSC2 TUN2 Bit 1 FOSC1 TUN1 Bit 0 FOSC0 TUN0 Value on POR, BOR -- ---0 0000 Value on all other Resets(1) -- ---u uuuu
x = unknown, u = unchanged, - = unimplemented locations read as `0'. Shaded cells are not used by oscillators. Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation. See Configuration Word register (Register 12-1) for operation of all register bits.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 29
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 30
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
4.0 I/O PORTS
There are as many as eleven general purpose I/O pins and an input pin available. Depending on which peripherals are enabled, some or all of the pins may not be available as general purpose I/O. In general, when a peripheral is enabled, the associated pin may not be used as a general purpose I/O pin. port pins are read, this value is modified and then written to the PORT data latch. RA3 reads `0' when MCLRE = 1. The TRISA register controls the direction of the PORTA pins, even when they are being used as analog inputs. The user must ensure the bits in the TRISA register are maintained set when using them as analog inputs. I/O pins configured as analog input always read `0'. Note: The ANSEL register must be initialized to configure an analog channel as a digital input. Pins configured as analog inputs will read `0' and cannot generate an interrupt.
4.1
PORTA and the TRISA Registers
PORTA is a 6-bit wide, bidirectional port. The corresponding data direction register is TRISA (Register 4-2). Setting a TRISA bit (= 1) will make the corresponding PORTA pin an input (i.e., disable the output driver). Clearing a TRISA bit (= 0) will make the corresponding PORTA pin an output (i.e., enables output driver and puts the contents of the output latch on the selected pin). The exception is RA3, which is input only and its TRIS bit will always read as `1'. Example 4-1 shows how to initialize PORTA. Reading the PORTA register (Register 4-1) reads the status of the pins, whereas writing to it will write to the PORT latch. All write operations are read-modify-write operations. Therefore, a write to a port implies that the
EXAMPLE 4-1:
BCF CLRF BSF CLRF MOVLW MOVWF BCF STATUS,RP0 PORTA STATUS,RP0 ANSEL 0Ch TRISA STATUS,RP0
INITIALIZING PORTA
;Bank 0 ;Init PORTA ;Bank 1 ;digital I/O ;Set RA<3:2> as inputs ;and set RA<5:4,1:0> ;as outputs ;Bank 0
REGISTER 4-1:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
PORTA: PORTA REGISTER
U-0 -- R/W-x RA5 R/W-0 RA4 R-x RA3 R/W-0 RA2 R/W-0 RA1 R/W-0 RA0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' RA<5:0>: PORTA I/O Pin bit 1 = PORTA pin is > VIH 0 = PORTA pin is < VIL
REGISTER 4-2:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
TRISA: PORTA TRI-STATE REGISTER
U-0 -- R/W-1 TRISA5 R/W-1 TRISA4 R-1 TRISA3 R/W-1 TRISA2 R/W-1 TRISA1 R/W-1 TRISA0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' TRISA<5:0>: PORTA Tri-State Control bit 1 = PORTA pin configured as an input (tri-stated) 0 = PORTA pin configured as an output TRISA<3> always reads `1'. TRISA<5:4> always reads `1' in XT, HS and LP Oscillator modes.
Note 1: 2:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 31
PIC16F610/616/16HV610/616
4.2 Additional Pin Functions
4.2.3 INTERRUPT-ON-CHANGE
Every PORTA pin on the PIC16F610/616/16HV610/ 616 has an interrupt-on-change option and a weak pullup option. The next three sections describe these functions. Each PORTA pin is individually configurable as an interrupt-on-change pin. Control bits IOCAx enable or disable the interrupt function for each pin. Refer to Register 4-5. The interrupt-on-change is disabled on a Power-on Reset. For enabled interrupt-on-change pins, the values are compared with the old value latched on the last read of PORTA. The `mismatch' outputs of the last read are OR'd together to set the PORTA Change Interrupt Flag bit (RAIF) in the INTCON register (Register 2-3). This interrupt can wake the device from Sleep. The user, in the Interrupt Service Routine, clears the interrupt by: a) b) Any read or write of PORTA. This will end the mismatch condition, then, Clear the flag bit RAIF.
4.2.1
ANSEL REGISTER
The ANSEL register is used to configure the Input mode of an I/O pin to analog. Setting the appropriate ANSEL bit high will cause all digital reads on the pin to be read as `0' and allow analog functions on the pin to operate correctly. The state of the ANSEL bits has no affect on digital output functions. A pin with TRIS clear and ANSEL set will still operate as a digital output, but the Input mode will be analog. This can cause unexpected behavior when executing read-modify-write instructions on the affected port.
4.2.2
WEAK PULL-UPS
Each of the PORTA pins, except RA3, has an individually configurable internal weak pull-up. Control bits WPUAx enable or disable each pull-up. Refer to Register 4-4. Each weak pull-up is automatically turned off when the port pin is configured as an output. The pull-ups are disabled on a Power-on Reset by the RAPU bit of the OPTION register). A weak pull-up is automatically enabled for RA3 when configured as MCLR and disabled when RA3 is an I/O. There is no software control of the MCLR pull-up.
A mismatch condition will continue to set flag bit RAIF. Reading PORTA will end the mismatch condition and allow flag bit RAIF to be cleared. The latch holding the last read value is not affected by a MCLR nor BOR Reset. After these resets, the RAIF flag will continue to be set if a mismatch is present. Note: If a change on the I/O pin should occur when any PORTA operation is being executed, then the RAIF interrupt flag may not get set.
REGISTER 4-3:
R/W-1 ANS7 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-0
ANSEL: ANALOG SELECT REGISTER
R/W-1 ANS6 R/W-1 ANS5 R/W-1 ANS4 R/W-1 ANS3 R/W-1 ANS2 R/W-1 ANS1 R/W-1 ANS0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ANS<7:0>: Analog Select bits Analog select between analog or digital function on pins AN<7:0>, respectively. 1 = Analog input. Pin is assigned as analog input(1). 0 = Digital I/O. Pin is assigned to port or special function. Setting a pin to an analog input automatically disables the digital input circuitry, weak pull-ups, and interrupt-on-change if available. The corresponding TRIS bit must be set to Input mode in order to allow external control of the voltage on the pin.
Note 1:
DS41288C-page 32
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 4-4:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-4 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
WPUA: WEAK PULL-UP PORTA REGISTER
U-0 -- R/W-1 WPUA5 R/W-1 WPUA4 U-0 -- R/W-1 WPUA2 R/W-1 WPUA1 R/W-1 WPUA0 bit 0
Unimplemented: Read as `0' WPUA<5:4>: Weak Pull-up Control bits 1 = Pull-up enabled 0 = Pull-up disabled Unimplemented: Read as `0' WPUA<2:0>: Weak Pull-up Control bits 1 = Pull-up enabled 0 = Pull-up disabled Global RAPU must be enabled for individual pull-ups to be enabled. The weak pull-up device is automatically disabled if the pin is in Output mode (TRISA = 0). The RA3 pull-up is enabled when configured as MCLR and disabled as an input in the Configuration Word. WPUA<5:4> always reads `1' in XT, HS and LP Oscillator modes.
bit 3 bit 2-0
Note 1: 2: 3: 4:
REGISTER 4-5:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
IOCA: INTERRUPT-ON-CHANGE PORTA REGISTER
U-0 -- R/W-0 IOCA5 R/W-0 IOCA4 R/W-0 IOCA3 R/W-0 IOCA2 R/W-0 IOCA1 R/W-0 IOCA0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' IOCA<5:0>: Interrupt-on-change PORTA Control bit 1 = Interrupt-on-change enabled 0 = Interrupt-on-change disabled Global Interrupt Enable (GIE) must be enabled for individual interrupts to be recognized. IOCA<5:4> always reads `1' in XT, HS and LP Oscillator modes.
Note 1: 2:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 33
PIC16F610/616/16HV610/616
4.2.4 PIN DESCRIPTIONS AND DIAGRAMS 4.2.4.2 RA1/AN1(1)/C12IN0-/VREF(1)/ ICSPCLK
Each PORTA pin is multiplexed with other functions. The pins and their combined functions are briefly described here. For specific information about individual functions such as the Comparator or the ADC, refer to the appropriate section in this data sheet. Figure 4-1 shows the diagram for this pin. The RA1 pin is configurable to function as one of the following: * * * * * a general purpose I/O an analog input for the ADC(1) an analog inverting input to the comparator a voltage reference input for the ADC(1) In-Circuit Serial Programming clock Note 1: PIC16F616/16HV616 only.
4.2.4.1
RA0/AN0(1)/C1IN+/ICSPDAT
Figure 4-1 shows the diagram for this pin. The RA0 pin is configurable to function as one of the following: * * * * a general purpose I/O an analog input for the ADC(1) an analog non-inverting input to the comparator In-Circuit Serial Programming data
FIGURE 4-1:
BLOCK DIAGRAM OF RA<1:0>
Analog(1) Input Mode VDD Data Bus D WR WPUA RD WPUA D WR PORTA Q I/O Pin VSS Q Weak RAPU VDD CK Q
CK Q
D WR TRISA RD TRISA RD PORTA D WR IOCA RD IOCA Q Interrupt-onChange S(2) R
Q
CK Q
Analog(1) Input Mode
Q Q D EN Q D EN Q1
CK Q
From other RA<5:1> pins (RA0) RA<5:2, 0> pins (RA1)
RD PORTA To Comparator To A/D Converter(3)
Write `0' to RAIF
Note
1: 2: 3:
Comparator mode and ANSEL determines Analog Input mode. Set has priority over Reset. PIC16F616/16HV616 only.
DS41288C-page 34
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
4.2.4.3 RA2/AN2(1)/T0CKI/INT/C1OUT
Figure 4-2 shows the diagram for this pin. The RA2 pin is configurable to function as one of the following: * * * * * a general purpose I/O an analog input for the ADC(1) the clock input for TMR0 an external edge triggered interrupt a digital output from Comparator C1
Note 1:
PIC16F616/16HV616 only.
FIGURE 4-2:
BLOCK DIAGRAM OF RA2
Analog(1) Input Mode VDD Data Bus D WR WPUA RD WPUA C1OE D WR PORTA Q 1 0 I/O Pin VSS Q C1OE Enable Weak RAPU VDD CK Q
CK Q
D WR TRISA RD TRISA RD PORTA D WR IOAC RD IOAC Q Interrupt-onChange S(2) R
Q
CK Q
Analog(1) Input Mode
Q Q D EN Q D EN Q1
CK Q
From other RA<5:3, 1:0> pins To Timer0 To INT
RD PORTA
Write `0' to RAIF
To A/D Converter(3) Note 1: 2: 3: Comparator mode and ANSEL determines Analog Input mode. Set has priority over Reset. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 35
PIC16F610/616/16HV610/616
4.2.4.4 RA3/MCLR/VPP
Figure 4-3 shows the diagram for this pin. The RA3 pin is configurable to function as one of the following: * a general purpose input * as Master Clear Reset with weak pull-up
FIGURE 4-3:
BLOCK DIAGRAM OF RA3
VDD MCLRE Weak
Data Bus Reset RD TRISA RD PORTA D WR IOCA RD IOCA Q Interrupt-onChange S(1) R From other
RA<5:4, 2:0> pins
MCLRE Input Pin MCLRE VSS
VSS
Q Q Q EN Q D EN Q1 D
CK
RD PORTA Write `0' to RAIF
Note 1:
Set has priority over Reset
DS41288C-page 36
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
4.2.4.5 RA4/AN3(1)/T1G/OSC2/CLKOUT
Figure 4-4 shows the diagram for this pin. The RA4 pin is configurable to function as one of the following: * a general purpose I/O * an analog input for the ADC(1) * a Timer1 gate (count enable) * a crystal/resonator connection * a clock output Note 1: PIC16F616/16HV616 only.
FIGURE 4-4:
BLOCK DIAGRAM OF RA4
Analog(3) Input Mode Data Bus WR WPUA RD WPUA OSC1 D Q CLK(1) Modes VDD Weak RAPU Oscillator Circuit CLKOUT Enable D WR PORTA Q FOSC/4 1 0 CLKOUT Enable D WR TRISA RD TRISA RD PORTA D WR IOCA RD IOCA Q S(4) R From other
RA<5, 3:0> pins
CK Q
VDD
CK Q
I/O Pin
Q
VSS INTOSC/ RC/EC(2) CLKOUT Enable Analog Input Mode
CK Q
Q Q D EN Q D EN Q1
CK Q
Interrupt-onChange
RD PORTA
Write `0' to RAIF
To T1G To A/D Converter(5)
Note 1: CLK modes are XT, HS, LP, TMR1 LP and CLKOUT Enable. 2: With CLKOUT option. 3: Analog Input mode comes from ANSEL. 4: Set has priority over Reset. 5: PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 37
PIC16F610/616/16HV610/616
4.2.4.6 RA5/T1CKI/OSC1/CLKIN
Figure 4-5 shows the diagram for this pin. The RA5 pin is configurable to function as one of the following: * * * * a general purpose I/O a Timer1 clock input a crystal/resonator connection a clock input
FIGURE 4-5:
BLOCK DIAGRAM OF RA5
INTOSC Mode Data Bus D WR WPUA RD WPUA CK Q Q RAPU Oscillator Circuit OSC2 D WR PORTA CK Q Q VDD TMR1LPEN(1) VDD Weak
I/O Pin D WR TRISA RD TRISA RD PORTA D WR IOCA RD IOCA Q Q Interrupt-onChange S(2) R From other RA<4:0> pins RD PORTA Write `0' to RAIF To Timer1 Note 1: 2: Timer1 LP Oscillator enabled. Set has priority over Reset. D EN CK Q Q Q EN Q1 D CK Q Q INTOSC Mode VSS
DS41288C-page 38
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 4-1:
Name ANSEL CM1CON0 CM2CON0 INTCON IOCA OPTION_REG PORTA TRISA WPUA Legend:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Bit 7 ANS7 C1ON C2ON GIE -- RAPU -- -- -- Bit 6 ANS6 C1OUT C2OUT PEIE -- INTEDG -- -- -- Bit 5 ANS5 C1OE C2OE T0IE IOCA5 T0CS RA5 TRISA5 WPUA5 Bit 4 ANS4 C1POL C2POL INTE IOCA4 T0SE RA4 TRISA4 WPUA4 Bit 3 ANS3
-- --
Bit 2 ANS2 C1R C2R T0IF IOCA2 PS2 RA2 TRISA2 WPUA2
Bit 1 ANS1 C1CH1 C2CH1 INTF IOCA1 PS1 RA1 TRISA1 WPUA1
Bit 0 ANS0 C1CH0 C2CH0 RAIF IOCA0 PS0 RA0 TRISA0 WPUA0
Value on POR, BOR 1111 1111 0000 -000 0000 -000 0000 0000 --00 0000 1111 1111 --x0 x000 --11 1111 --11 -111
Value on all other Resets 1111 1111 0000 -000 0000 -000 0000 0000 --00 0000 1111 1111 --u0 u000 --11 1111 --11 -111
RAIE IOCA3 PSA RA3 TRISA3 --
x = unknown, u = unchanged, - = unimplemented locations read as `0'. Shaded cells are not used by PORTA.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 39
PIC16F610/616/16HV610/616
4.3 PORTC and the TRISC Registers
EXAMPLE 4-2:
BCF CLRF BSF CLRF MOVLW MOVWF BCF STATUS,RP0 PORTC STATUS,RP0 ANSEL 0Ch TRISC STATUS,RP0
INITIALIZING PORTC
;Bank 0 ;Init PORTC ;Bank 1 ;digital I/O ;Set RC<3:2> as inputs ;and set RC<5:4,1:0> ;as outputs ;Bank 0
PORTC is a general purpose I/O port consisting of 6 bidirectional pins. The pins can be configured for either digital I/O or analog input to A/D Converter (ADC) or Comparator. For specific information about individual functions such as the Enhanced CCP or the ADC, refer to the appropriate section in this data sheet. Note: The ANSEL register must be initialized to configure an analog channel as a digital input. Pins configured as analog inputs will read `0' and cannot generate an interrupt.
REGISTER 4-6:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
PORTC: PORTC REGISTER
U-0 -- R/W-x RC5 R/W-x RC4 R/W-0 RC3 R/W-0 RC2 R/W-x RC1 R/W-x RC0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' RC<5:0>: PORTC I/O Pin bit 1 = PORTC pin is > VIH 0 = PORTC pin is < VIL
REGISTER 4-7:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
TRISC: PORTC TRI-STATE REGISTER
U-0 -- R/W-1 TRISC5 R/W-1 TRISC4 R/W-1 TRISC3 R/W-1 TRISC2 R/W-1 TRISC1 R/W-1 TRISC0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Unimplemented: Read as `0' TRISC<5:0>: PORTC Tri-State Control bit 1 = PORTC pin configured as an input (tri-stated) 0 = PORTC pin configured as an output
DS41288C-page 40
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
4.3.1 RC0/AN4(1)/C2IN+ 4.3.3 RC2/AN6(1)/C12IN2-/P1D(1)
The RC0 is configurable to function as one of the following: * a general purpose I/O * an analog input for the ADC(1) * an analog non-inverting input to Comparator C2 The RC2 is configurable to function as one of the following: * * * * a general purpose I/O an analog input for the ADC(1) an analog input to Comparators C1 and C2 a digital output from the Enhanced CCP(1)
4.3.2
RC1/AN5(1)/C12IN1-
The RC1 is configurable to function as one of the following: * a general purpose I/O * an analog input for the ADC(1) * an analog inverting input to the comparator Note 1: PIC16F616/16HV616 only.
4.3.4
RC3/AN7(1)/C12IN3-/P1C(1)
The RC3 is configurable to function as one of the following: * * * * a general purpose I/O an analog input for the ADC(1) an analog inverting input to Comparators C1 and C2 a digital output from the Enhanced CCP(1) Note 1: PIC16F616/16HV616 only.
FIGURE 4-6:
Data Bus
BLOCK DIAGRAM OF RC0 AND RC1
FIGURE 4-7:
D Q Q D I/O Pin D Q Q Analog Input Mode(1) VSS WR TRISC RD TRISC To Comparators To A/D Converter RD PORTC WR PORTC CK Q Q VDD Data Bus
BLOCK DIAGRAM OF RC2 AND RC3
CCPOUT(2) Enable VDD
WR PORTC
CK
CCPOUT
1 0 I/O Pin
WR TRISC RD TRISC RD PORTC
CK
D CK
Q Q Analog Input Mode(1) VSS
To A/D Converter Note 1: Analog Input mode comes from ANSEL or Comparator mode. Note 1: 2: Analog Input mode comes from ANSEL. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 41
PIC16F610/616/16HV610/616
4.3.5 RC4/C2OUT/P1B(1) 4.3.6 RC5/CCP1(1)/P1A(1)
The RC4 is configurable to function as one of the following: * a general purpose I/O * a digital output from Comparator C2 * a digital output from the Enhanced CCP(1) Note 1: PIC16F616/16HV616 only. 2: Enabling both C2OUT and P1B will cause a conflict on RC4 and create unpredictable results. Therefore, if C2OUT is enabled, the ECCP can not be used in Half-Bridge or Full-Bridge mode and vice-versa. The RC5 is configurable to function as one of the following: * a general purpose I/O * a digital input/output for the Enhanced CCP(1) Note 1: PIC16F616/16HV616 only.
FIGURE 4-9:
Data bus
BLOCK DIAGRAM OF RC5 PIN
D WR PORTC CK
Q Q
CCP1OUT(1) Enable CCP1OUT(1)/ 1 P1A 0
VDD
FIGURE 4-8:
C2OE CCP1M<3:0> C2OE C2OUT CCP1M<3:0> CCPOUT/P1B Data Bus D WR PORTC Q
BLOCK DIAGRAM OF RC4
I/O Pin
D VDD WR TRISC RD TRISC I/O Pin RD PORTC VSS CK
Q Q VSS
1 0
CK Q
To Enhanced CCP
D WR TRISC RD TRISC RD PORTC Note 1:
Q
Note
1:
PIC16F616/16HV616 only.
CK Q
Port/Peripheral Select signals selects between PORT data and peripheral output.
TABLE 4-2:
Name ANSEL CCP1CON CM1CON0 CM2CON0 PORTC TRISC Legend:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTC
Bit 7 ANS7 P1M1 Bit 6 ANS6 P1M0 C1OUT C2OUT -- -- Bit 5 ANS5 DC1B1 C1OE C2OE RC5 TRISC5 Bit 4 ANS4 DC1B0 C1POL C2POL RC4 TRISC4 Bit 3 ANS3 CCP1M3 -- -- RC3 TRISC3 Bit 2 ANS2 CCP1M2 C1R C2R RC2 TRISC2 Bit 1 ANS1 CCP1M1 C1CH1 C2CH1 RC1 TRISC1 Bit 0 ANS0 CCP1M0 C1CH0 C2CH0 RC0 TRISC0 Value on POR, BOR 1111 1111 0000 0000 0000 -000 0000 -000 --xx 00xx --11 1111 Value on all other Resets 1111 1111 0000 0000 0000 -000 0000 -000 --uu 00uu --11 1111
C1ON C2ON -- --
x = unknown, u = unchanged, - = unimplemented locations read as `0'. Shaded cells are not used by PORTC.
DS41288C-page 42
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
5.0 TIMER0 MODULE
5.1 Timer0 Operation
The Timer0 module is an 8-bit timer/counter with the following features: * * * * * 8-bit timer/counter register (TMR0) 8-bit prescaler (shared with Watchdog Timer) Programmable internal or external clock source Programmable external clock edge selection Interrupt on overflow When used as a timer, the Timer0 module can be used as either an 8-bit timer or an 8-bit counter.
5.1.1
8-BIT TIMER MODE
When used as a timer, the Timer0 module will increment every instruction cycle (without prescaler). Timer mode is selected by clearing the T0CS bit of the OPTION register to `0'. When TMR0 is written, the increment is inhibited for two instruction cycles immediately following the write. Note: The value written to the TMR0 register can be adjusted, in order to account for the two instruction cycle delay when TMR0 is written.
Figure 5-1 is a block diagram of the Timer0 module.
5.1.2
8-BIT COUNTER MODE
When used as a counter, the Timer0 module will increment on every rising or falling edge of the T0CKI pin. The incrementing edge is determined by the T0SE bit of the OPTION register. Counter mode is selected by setting the T0CS bit of the OPTION register to `1'.
FIGURE 5-1:
FOSC/4
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
Data Bus 0 1 1 T0CKI pin T0SE 0 0 T0CS 1 8 3 PS<2:0> WDTE Watchdog Timer 1 WDT Time-out 0 8-bit Prescaler PSA Set Flag bit T0IF on Overflow Sync 2 Tcy TMR0 8
PSA
PSA
Note 1: 2:
T0SE, T0CS, PSA, PS<2:0> are bits in the OPTION register. WDTE bit is in the Configuration Word register.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 43
PIC16F610/616/16HV610/616
5.1.3 SOFTWARE PROGRAMMABLE PRESCALER
A single software programmable prescaler is available for use with either Timer0 or the Watchdog Timer (WDT), but not both simultaneously. The prescaler assignment is controlled by the PSA bit of the OPTION register. To assign the prescaler to Timer0, the PSA bit must be cleared to a `0'. There are 8 prescaler options for the Timer0 module ranging from 1:2 to 1:256. The prescale values are selectable via the PS<2:0> bits of the OPTION register. In order to have a 1:1 prescaler value for the Timer0 module, the prescaler must be assigned to the WDT module. The prescaler is not readable or writable. When assigned to the Timer0 module, all instructions writing to the TMR0 register will clear the prescaler. When the prescaler is assigned to WDT, a CLRWDT instruction will clear the prescaler along with the WDT. When changing the prescaler assignment from the WDT to the Timer0 module, the following instruction sequence must be executed (see Example 5-2).
EXAMPLE 5-2:
CLRWDT
CHANGING PRESCALER (WDT TIMER0)
;Clear WDT and ;prescaler BANKSEL OPTION_REG ; MOVLW b'11110000' ;Mask TMR0 select and ANDWF OPTION_REG,W ;prescaler bits IORLW b'00000011' ;Set prescale to 1:16 MOVWF OPTION_REG ;
5.1.4
TIMER0 INTERRUPT
5.1.3.1
Switching Prescaler Between Timer0 and WDT Modules
Timer0 will generate an interrupt when the TMR0 register overflows from FFh to 00h. The T0IF interrupt flag bit of the INTCON register is set every time the TMR0 register overflows, regardless of whether or not the Timer0 interrupt is enabled. The T0IF bit must be cleared in software. The Timer0 interrupt enable is the T0IE bit of the INTCON register. Note: The Timer0 interrupt cannot wake the processor from Sleep since the timer is frozen during Sleep.
As a result of having the prescaler assigned to either Timer0 or the WDT, it is possible to generate an unintended device Reset when switching prescaler values. When changing the prescaler assignment from Timer0 to the WDT module, the instruction sequence shown in Example 5-1 must be executed.
5.1.5
USING TIMER0 WITH AN EXTERNAL CLOCK
EXAMPLE 5-1:
BANKSEL CLRWDT CLRF TMR0
CHANGING PRESCALER (TIMER0 WDT)
; ;Clear WDT TMR0 ;Clear TMR0 and ;prescaler BANKSEL OPTION_REG ; BSF OPTION_REG,PSA ;Select WDT CLRWDT ; ; MOVLW b'11111000' ;Mask prescaler ANDWF OPTION_REG,W ;bits IORLW b'00000101' ;Set WDT prescaler MOVWF OPTION_REG ;to 1:32
When Timer0 is in Counter mode, the synchronization of the T0CKI input and the Timer0 register is accomplished by sampling the prescaler output on the Q2 and Q4 cycles of the internal phase clocks. Therefore, the high and low periods of the external clock source must meet the timing requirements as shown in Section 15.0 "Electrical Specifications".
DS41288C-page 44
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 5-1:
R/W-1 RAPU bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
OPTION_REG: OPTION REGISTER
R/W-1 INTEDG R/W-1 T0CS R/W-1 T0SE R/W-1 PSA R/W-1 PS2 R/W-1 PS1 R/W-1 PS0 bit 0
RAPU: PORTA Pull-up Enable bit 1 = PORTA pull-ups are disabled 0 = PORTA pull-ups are enabled by individual PORT latch values INTEDG: Interrupt Edge Select bit 1 = Interrupt on rising edge of INT pin 0 = Interrupt on falling edge of INT pin T0CS: TMR0 Clock Source Select bit 1 = Transition on T0CKI pin 0 = Internal instruction cycle clock (FOSC/4) T0SE: TMR0 Source Edge Select bit 1 = Increment on high-to-low transition on T0CKI pin 0 = Increment on low-to-high transition on T0CKI pin PSA: Prescaler Assignment bit 1 = Prescaler is assigned to the WDT 0 = Prescaler is assigned to the Timer0 module PS<2:0>: Prescaler Rate Select bits
BIT VALUE 000 001 010 011 100 101 110 111 TMR0 RATE 1:2 1:4 1:8 1 : 16 1 : 32 1 : 64 1 : 128 1 : 256 WDT RATE 1:1 1:2 1:4 1:8 1 : 16 1 : 32 1 : 64 1 : 128
bit 6
bit 5
bit 4
bit 3
bit 2-0
TABLE 5-1:
Name TMR0 INTCON OPTION_REG TRISA
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR, BOR Value on all other Resets
Timer0 Modules Register GIE -- PEIE -- T0IE T0CS INTE T0SE RAIE PSA T0IF PS2 INTF PS1 RAIF PS0 RAPU INTEDG
xxxx xxxx uuuu uuuu 0000 0000 0000 0000 1111 1111 1111 1111
TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 --11 1111 --11 1111
Legend: - = Unimplemented locations, read as `0', u = unchanged, x = unknown. Shaded cells are not used by the Timer0 module.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 45
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 46
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
6.0 TIMER1 MODULE WITH GATE CONTROL
6.1 Timer1 Operation
The Timer1 module is a 16-bit incrementing counter which is accessed through the TMR1H:TMR1L register pair. Writes to TMR1H or TMR1L directly update the counter. When used with an internal clock source, the module is a timer. When used with an external clock source, the module can be used as either a timer or counter.
The Timer1 module is a 16-bit timer/counter with the following features: * * * * * * * * * * * 16-bit timer/counter register pair (TMR1H:TMR1L) Programmable internal or external clock source 3-bit prescaler Optional LP oscillator Synchronous or asynchronous operation Timer1 gate (count enable) via comparator or T1G pin Interrupt on overflow Wake-up on overflow (external clock, Asynchronous mode only) Time base for the Capture/Compare function Special Event Trigger (with ECCP) Comparator output synchronization to Timer1 clock
6.2
Clock Source Selection
The TMR1CS bit of the T1CON register is used to select the clock source. When TMR1CS = 0, the clock source is FOSC/4. When TMR1CS = 1, the clock source is supplied externally.
Clock Source FOSC/4 FOSC T1CKI pin
TMR1CS 0 0 1
T1ACS 0 1 x
Figure 6-1 is a block diagram of the Timer1 module.
FIGURE 6-1:
TIMER1 BLOCK DIAGRAM
TMR1GE TMR1ON Set flag bit TMR1IF on Overflow To C2 Comparator Module Timer1 Clock EN 0 Synchronized clock input T1GINV
TMR1(2) TMR1H TMR1L
1
Oscillator
(1)
T1SYNC 1 Prescaler 1, 2, 4, 8 0 Synchronize(3) det
OSC1/T1CKI
OSC2/T1G TMR1CS
2 T1CKPS<1:0> 1
INTOSC Without CLKOUT T1OSCEN
FOSC FOSC/4 Internal Clock
1 0 T1ACS
C2OUT
0 T1GSS
Note 1: 2: 3:
ST Buffer is low power type when using LP osc, or high speed type when using T1CKI. Timer1 register increments on rising edge. Synchronize does not operate while in Sleep.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 47
PIC16F610/616/16HV610/616
6.2.1 INTERNAL CLOCK SOURCE
6.5
When the internal clock source is selected the TMR1H:TMR1L register pair will increment on multiples of TCY as determined by the Timer1 prescaler.
Timer1 Operation in Asynchronous Counter Mode
6.2.2
EXTERNAL CLOCK SOURCE
When the external clock source is selected, the Timer1 module may work as a timer or a counter. When counting, Timer1 is incremented on the rising edge of the external clock input T1CKI. In addition, the Counter mode clock can be synchronized to the microcontroller system clock or run asynchronously. If an external clock oscillator is needed (and the microcontroller is using the INTOSC without CLKOUT), Timer1 can use the LP oscillator as a clock source. Note: In Counter mode, a falling edge must be registered by the counter prior to the first incrementing rising edge.
If control bit T1SYNC of the T1CON register is set, the external clock input is not synchronized. The timer continues to increment asynchronous to the internal phase clocks. The timer will continue to run during Sleep and can generate an interrupt on overflow, which will wake-up the processor. However, special precautions in software are needed to read/write the timer (see Section 6.5.1 "Reading and Writing Timer1 in Asynchronous Counter Mode"). Note: When switching from synchronous to asynchronous operation, it is possible to skip an increment. When switching from asynchronous to synchronous operation, it is possible to produce an additional increment.
6.5.1
6.3
Timer1 Prescaler
READING AND WRITING TIMER1 IN ASYNCHRONOUS COUNTER MODE
Timer1 has four prescaler options allowing 1, 2, 4 or 8 divisions of the clock input. The T1CKPS bits of the T1CON register control the prescale counter. The prescale counter is not directly readable or writable; however, the prescaler counter is cleared upon a write to TMR1H or TMR1L.
Reading TMR1H or TMR1L while the timer is running from an external asynchronous clock will ensure a valid read (taken care of in hardware). However, the user should keep in mind that reading the 16-bit timer in two 8-bit values itself, poses certain problems, since the timer may overflow between the reads. For writes, it is recommended that the user simply stop the timer and write the desired values. A write contention may occur by writing to the timer registers, while the register is incrementing. This may produce an unpredictable value in the TMR1H:TMR1L register pair.
6.4
Timer1 Oscillator
A low-power 32.768 kHz crystal oscillator is built-in between pins OSC1 (input) and OSC2 (output). The oscillator is enabled by setting the T1OSCEN control bit of the T1CON register. The oscillator will continue to run during Sleep. The Timer1 oscillator is shared with the system LP oscillator. Thus, Timer1 can use this mode only when the primary system clock is derived from the internal oscillator or when the oscillator is in the LP Oscillator mode. The user must provide a software time delay to ensure proper oscillator start-up. TRISA5 and TRISA4 bits are set when the Timer1 oscillator is enabled. RA5 and RA4 bits read as `0' and TRISA5 and TRISA4 bits read as `1'. Note: The oscillator requires a start-up and stabilization time before use. Thus, T1OSCEN should be set and a suitable delay observed prior to enabling Timer1.
6.6
Timer1 Gate
Timer1 gate source is software configurable to be the T1G pin or the output of Comparator C2. This allows the device to directly time external events using T1G or analog events using Comparator C2. See the CM2CON1 register (Register 8-3) for selecting the Timer1 gate source. This feature can simplify the software for a Delta-Sigma A/D converter and many other applications. For more information on Delta-Sigma A/D converters, see the Microchip web site (www.microchip.com). Note: TMR1GE bit of the T1CON register must be set to use either T1G or C2OUT as the Timer1 gate source. See the CM2CON1 register (Register 8-3) for more information on selecting the Timer1 gate source.
Timer1 gate can be inverted using the T1GINV bit of the T1CON register, whether it originates from the T1G pin or Comparator C2 output. This configures Timer1 to measure either the active-high or active-low time between events.
DS41288C-page 48
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
6.7 Timer1 Interrupt
The Timer1 register pair (TMR1H:TMR1L) increments to FFFFh and rolls over to 0000h. When Timer1 rolls over, the Timer1 interrupt flag bit of the PIR1 register is set. To enable the interrupt on rollover, you must set these bits: * * * * * * TMR1IE bit of the PIE1 register PEIE bit of the INTCON register GIE bit of the INTCON register T1SYNC bit of the T1CON register TMR1CS bit of the T1CON register T1OSCEN bit of the T1CON register (can be set) In Capture mode, the value in the TMR1H:TMR1L register pair is copied into the CCPR1H:CCPR1L register pair on a configured event. In Compare mode, an event is triggered when the value CCPR1H:CCPR1L register pair matches the value in the TMR1H:TMR1L register pair. This event can be a Special Event Trigger. For more information, see Section 10.0 "Enhanced Capture/Compare/PWM (With Auto-Shutdown and Dead Band) Module (PIC16F616/16HV616 Only)".
6.10
ECCP Special Event Trigger (PIC16F616/16HV616 Only)
The interrupt is cleared by clearing the TMR1IF bit in the Interrupt Service Routine. Note: The TMR1H:TTMR1L register pair and the TMR1IF bit should be cleared before enabling interrupts.
When the ECCP is configured to trigger a special event, the trigger will clear the TMR1H:TMR1L register pair. This special event does not cause a Timer1 interrupt. The ECCP module may still be configured to generate a ECCP interrupt. In this mode of operation, the CCPR1H:CCPR1L register pair effectively becomes the period register for Timer1. Timer1 should be synchronized to the FOSC to utilize the Special Event Trigger. Asynchronous operation of Timer1 can cause a Special Event Trigger to be missed. In the event that a write to TMR1H or TMR1L coincides with a Special Event Trigger from the ECCP, the write will take precedence. For more information, see Section 10.2.4 "Special Event Trigger".
6.8
Timer1 Operation During Sleep
Timer1 can only operate during Sleep when setup in Asynchronous Counter mode. In this mode, an external crystal or clock source can be used to increment the counter. To set up the timer to wake the device: * TMR1ON bit of the T1CON register must be set * TMR1IE bit of the PIE1 register must be set * PEIE bit of the INTCON register must be set The device will wake-up on an overflow and execute the next instruction. If the GIE bit of the INTCON register is set, the device will call the Interrupt Service Routine (0004h).
6.11
Comparator Synchronization
6.9
ECCP Capture/Compare Time Base (PIC16F616/16HV616 Only)
The same clock used to increment Timer1 can also be used to synchronize the comparator output. This feature is enabled in the Comparator module. When using the comparator for Timer1 gate, the comparator output should be synchronized to Timer1. This ensures Timer1 does not miss an increment if the comparator changes. For more information, see Section 8.8.2 "Synchronizing Comparator C2 Output to Timer1".
The ECCP module uses the TMR1H:TMR1L register pair as the time base when operating in Capture or Compare mode.
FIGURE 6-2:
T1CKI = 1 when TMR1 Enabled
TIMER1 INCREMENTING EDGE
T1CKI = 0 when TMR1 Enabled Note 1: 2: Arrows indicate counter increments. In Counter mode, a falling edge must be registered by the counter prior to the first incrementing rising edge of the clock.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 49
PIC16F610/616/16HV610/616
6.12 Timer1 Control Register
The Timer1 Control register (T1CON), shown in Register 6-1, is used to control Timer1 and select the various features of the Timer1 module.
REGISTER 6-1:
R/W-0 T1GINV bit 7 Legend: R = Readable bit -n = Value at POR bit 7
(1)
T1CON: TIMER1 CONTROL REGISTER
R/W-0 R/W-0
(2)
R/W-0 T1CKPS0
R/W-0 T1OSCEN
R/W-0 T1SYNC
R/W-0 TMR1CS
R/W-0 TMR1ON bit 0
TMR1GE
T1CKPS1
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
T1GINV: Timer1 Gate Invert bit(1) 1 = Timer1 gate is active-high (Timer1 counts when gate is high) 0 = Timer1 gate is active-low (Timer1 counts when gate is low) TMR1GE: Timer1 Gate Enable bit(2) If TMR1ON = 0: This bit is ignored If TMR1ON = 1: 1 = Timer1 counting is controlled by the Timer1 Gate function 0 = Timer1 is always counting T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits 11 = 1:8 Prescale Value 10 = 1:4 Prescale Value 01 = 1:2 Prescale Value 00 = 1:1 Prescale Value T1OSCEN: LP Oscillator Enable Control bit If INTOSC without CLKOUT oscillator is active: 1 = LP oscillator is enabled for Timer1 clock 0 = LP oscillator is off Else: This bit is ignored T1SYNC: Timer1 External Clock Input Synchronization Control bit TMR1CS = 1: 1 = Do not synchronize external clock input 0 = Synchronize external clock input TMR1CS = 0: This bit is ignored. Timer1 uses the internal clock TMR1CS: Timer1 Clock Source Select bit 1 = External clock from T1CKI pin (on the rising edge) 0 = Internal clock If TMR1ACS = 0: FOSC/4 If TMR1ACS = 1: FOSC TMR1ON: Timer1 On bit 1 = Enables Timer1 0 = Stops Timer1 T1GINV bit inverts the Timer1 gate logic, regardless of source. TMR1GE bit must be set to use either T1G pin or C2OUT, as selected by the T1GSS bit of the CM2CON1 register, as a Timer1 gate source.
bit 6
bit 5-4
bit 3
bit 2
bit 1
bit 0
Note 1: 2:
DS41288C-page 50
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 6-1:
Name CM2CON0 CM2CON1 INTCON PIE1 PIR1 TMR1H TMR1L T1CON Legend: Note 1:
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER1
Bit 7 C2ON Bit 6 C2OUT MC2OUT PEIE ADIE(1) ADIF
(1)
Bit 5 C2OE -- T0IE CCP1IE(1) CCP1IF
(1)
Bit 4 C2POL T1ACS INTE C2IE C2IF
Bit 3 -- C1HYS RAIE C1IE C1IF
Bit 2 C2R C2HYS T0IF -- --
Bit 1 C2CH1 T1GSS INTF TMR2IE(1) TMR2IF(1)
Bit 0 C2CH0 C2SYNC RAIF TMR1IE TMR1IF
Value on POR, BOR 0000 -000 00-0 0010 0000 0000 -000 0-00 -000 0-00 xxxx xxxx xxxx xxxx
Value on all other Resets 0000 -000 00-0 0010 0000 0000 -000 0-00 -000 0-00 uuuu uuuu uuuu uuuu uuuu uuuu
MC1OUT GIE -- --
Holding Register for the Most Significant Byte of the 16-bit TMR1 Register Holding Register for the Least Significant Byte of the 16-bit TMR1 Register T1GINV TMR1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON
0000 0000
x = unknown, u = unchanged, - = unimplemented, read as `0'. Shaded cells are not used by the Timer1 module. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 51
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 52
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
7.0 TIMER2 MODULE (PIC16F616/16HV616 ONLY)
The TMR2 and PR2 registers are both fully readable and writable. On any Reset, the TMR2 register is set to 00h and the PR2 register is set to FFh. Timer2 is turned on by setting the TMR2ON bit in the T2CON register to a `1'. Timer2 is turned off by setting the TMR2ON bit to a `0'. The Timer2 prescaler is controlled by the T2CKPS bits in the T2CON register. The Timer2 postscaler is controlled by the TOUTPS bits in the T2CON register. The prescaler and postscaler counters are cleared when: * A write to TMR2 occurs. * A write to T2CON occurs. * Any device Reset occurs (Power-on Reset, MCLR Reset, Watchdog Timer Reset, or Brown-out Reset). Note: TMR2 is not cleared when T2CON is written.
The Timer2 module is an 8-bit timer with the following features: * * * * * 8-bit timer register (TMR2) 8-bit period register (PR2) Interrupt on TMR2 match with PR2 Software programmable prescaler (1:1, 1:4, 1:16) Software programmable postscaler (1:1 to 1:16)
See Figure 7-1 for a block diagram of Timer2.
7.1
Timer2 Operation
The clock input to the Timer2 module is the system instruction clock (FOSC/4). The clock is fed into the Timer2 prescaler, which has prescale options of 1:1, 1:4 or 1:16. The output of the prescaler is then used to increment the TMR2 register. The values of TMR2 and PR2 are constantly compared to determine when they match. TMR2 will increment from 00h until it matches the value in PR2. When a match occurs, two things happen: * TMR2 is reset to 00h on the next increment cycle. * The Timer2 postscaler is incremented The match output of the Timer2/PR2 comparator is then fed into the Timer2 postscaler. The postscaler has postscale options of 1:1 to 1:16 inclusive. The output of the Timer2 postscaler is used to set the TMR2IF interrupt flag bit in the PIR1 register.
FIGURE 7-1:
TIMER2 BLOCK DIAGRAM
TMR2 Output Sets Flag bit TMR2IF
FOSC/4
Prescaler 1:1, 1:4, 1:16 2 T2CKPS<1:0>
TMR2
Reset
Comparator EQ PR2
Postscaler 1:1 to 1:16 4 TOUTPS<3:0>
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 53
PIC16F610/616/16HV610/616
REGISTER 7-1:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6-3 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
T2CON: TIMER2 CONTROL REGISTER
R/W-0 R/W-0 TOUTPS2 R/W-0 TOUTPS1 R/W-0 TOUTPS0 R/W-0 TMR2ON R/W-0 T2CKPS1 R/W-0 T2CKPS0 bit 0
TOUTPS3
Unimplemented: Read as `0' TOUTPS<3:0>: Timer2 Output Postscaler Select bits 0000 = 1:1 Postscaler 0001 = 1:2 Postscaler 0010 = 1:3 Postscaler 0011 = 1:4 Postscaler 0100 = 1:5 Postscaler 0101 = 1:6 Postscaler 0110 = 1:7 Postscaler 0111 = 1:8 Postscaler 1000 = 1:9 Postscaler 1001 = 1:10 Postscaler 1010 = 1:11 Postscaler 1011 = 1:12 Postscaler 1100 = 1:13 Postscaler 1101 = 1:14 Postscaler 1110 = 1:15 Postscaler 1111 = 1:16 Postscaler TMR2ON: Timer2 On bit 1 = Timer2 is on 0 = Timer2 is off T2CKPS<1:0>: Timer2 Clock Prescale Select bits 00 = Prescaler is 1 01 = Prescaler is 4 1x = Prescaler is 16
bit 2
bit 1-0
TABLE 7-1:
Name INTCON PIE1 PIR1 PR2 TMR2 T2CON Legend: Note 1: Bit 7 GIE -- --
SUMMARY OF ASSOCIATED TIMER2 REGISTERS
Bit 6 PEIE ADIE(1) ADIF(1) Bit 5 T0IE CCP1IE(1) CCP1IF(1) Bit 4 INTE C2IE C2IF Bit 3 RAIE C1IE C1IF Bit 2 T0IF -- -- Bit 1 INTF TMR2IE(1) TMR2IF(1) Bit 0 RAIF TMR1IE TMR1IF Value on POR, BOR 0000 0000 -000 0-00 -000 0-00 1111 1111 0000 0000 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 TOUTPS1 Value on all other Resets 0000 0000 -000 0-00 -000 0-00 1111 1111 0000 0000 -000 0000
Timer2 Module Period Register Holding Register for the 8-bit TMR2 Register -- TOUTPS3 TOUTPS2
x = unknown, u = unchanged, - = unimplemented read as `0'. Shaded cells are not used for Timer2 module. PIC16F616/16HV616 only.
DS41288C-page 54
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
8.0 COMPARATOR MODULE
FIGURE 8-1:
VIN+ VIN-
SINGLE COMPARATOR
+ - Output
Comparators are used to interface analog circuits to a digital circuit by comparing two analog voltages and providing a digital indication of their relative magnitudes. The comparators are very useful mixed signal building blocks because they provide analog functionality independent of the device. The Analog Comparator module includes the following features: * * * * * * * * * * * * Independent comparator control Programmable input selection Comparator output is available internally/externally Programmable output polarity Interrupt-on-change Wake-up from Sleep PWM shutdown Timer1 gate (count enable) Output synchronization to Timer1 clock input SR Latch Programmable and fixed voltage reference User-enable Comparator Hysteresis Note: Only Comparator C2 can be linked to Timer1.
VINVIN+
Output
Note:
The black areas of the output of the comparator represents the uncertainty due to input offsets and response time.
8.1
Comparator Overview
A single comparator is shown in Figure 8-1 along with the relationship between the analog input levels and the digital output. When the analog voltage at VIN+ is less than the analog voltage at VIN-, the output of the comparator is a digital low level. When the analog voltage at VIN+ is greater than the analog voltage at VIN-, the output of the comparator is a digital high level.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 55
PIC16F610/616/16HV610/616
FIGURE 8-2: COMPARATOR C1 SIMPLIFIED BLOCK DIAGRAM
C1CH<1:0> 2 D C12IN0C12IN1C12IN2C12IN30 1 MUX 2 3 C1ON(1) C1R C1IN+ C1VREF 0 MUX 1 C1VIN- C1 C1VIN+ + C1POL Note 1: 2: When C1ON = 0, the C1 comparator will produce a `0' output to the XOR Gate. Output shown for reference only. See I/O port pin block diagram for more detail. Reset C1OE C1OUT C1OUT pin(2) Q1 EN Q C1POL To Data Bus RD_CM1CON0 Set C1IF D Q3*RD_CM1CON0 Q To PWM Logic EN CL
FIGURE 8-3:
COMPARATOR C2 SIMPLIFIED BLOCK DIAGRAM
C2POL D Q1 C2CH<1:0> 2 D C2ON(1) C2VINC2VIN+ C2 C2OUT C2SYNC C2POL D Q 0 MUX 1 To other peripherals Q3*RD_CM2CON0 Reset Q EN Q To Data Bus RD_CM2CON0 Set C2IF EN CL
C12IN0C12IN1C2IN2C2IN3-
0 1 MUX 2 3
C2OE
C2R C2IN+ C2VREF 0 MUX 1
C2OUT pin(2) SYNCC2OUT To Timer1 Gate To SR Latch
From Timer1 Clock
Note 1: 2:
When C2ON = 0, the C2 comparator will produce a `0' output to the XOR Gate. Output shown for reference only. See I/O port pin block diagram for more detail.
DS41288C-page 56
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
8.2 Comparator Control
8.2.4 COMPARATOR OUTPUT SELECTION
Each comparator has a separate control and Configuration register: CM1CON0 for Comparator C1 and CM2CON0 for Comparator C2. In addition, Comparator C2 has a second control register, CM2CON1, for controlling the interaction with Timer1 and simultaneous reading of both comparator outputs. The CM1CON0 and CM2CON0 registers (see Registers 8-1 and 8-2, respectively) contain the control and Status bits for the following: * * * * * Enable Input selection Reference selection Output selection Output polarity The output of the comparator can be monitored by reading either the CxOUT bit of the CMxCON0 register or the MCxOUT bit of the CM2CON1 register. In order to make the output available for an external connection, the following conditions must be true: * CxOE bit of the CMxCON0 register must be set * Corresponding TRIS bit must be cleared * CxON bit of the CMxCON0 register must be set. Note 1: The CxOE bit overrides the PORT data latch. Setting the CxON has no impact on the port override. 2: The internal output of the comparator is latched with each instruction cycle. Unless otherwise specified, external outputs are not latched.
8.2.1
COMPARATOR ENABLE
Setting the CxON bit of the CMxCON0 register enables the comparator for operation. Clearing the CxON bit disables the comparator for minimum current consumption.
8.2.5
COMPARATOR OUTPUT POLARITY
8.2.2
COMPARATOR INPUT SELECTION
Inverting the output of the comparator is functionally equivalent to swapping the comparator inputs. The polarity of the comparator output can be inverted by setting the CxPOL bit of the CMxCON0 register. Clearing the CxPOL bit results in a non-inverted output. Table 8-1 shows the output state versus input conditions, including polarity control.
The CxCH<1:0> bits of the CMxCON0 register direct one of four analog input pins to the comparator inverting input. Note: To use CxIN+ and CxIN- pins as analog inputs, the appropriate bits must be set in the ANSEL register and the corresponding TRIS bits must also be set to disable the output drivers.
TABLE 8-1:
COMPARATOR OUTPUT STATE VS. INPUT CONDITIONS
CxPOL 0 0 1 1 CxOUT 0 1 1 0
Input Condition CxVIN- > CxVIN+ CxVIN- < CxVIN+ CxVIN- > CxVIN+ CxVIN- < CxVIN+
8.2.3
COMPARATOR REFERENCE SELECTION
Setting the CxR bit of the CMxCON0 register directs an internal voltage reference or an analog input pin to the non-inverting input of the comparator. See Section 8.11 "Comparator Voltage Reference" for more information on the internal voltage reference module.
8.3
Comparator Response Time
The comparator output is indeterminate for a period of time after the change of an input source or the selection of a new reference voltage. This period is referred to as the response time. The response time of the comparator differs from the settling time of the voltage reference. Therefore, both of these times must be considered when determining the total response time to a comparator input change. See the Comparator and Voltage Reference Specifications in Section 15.0 "Electrical Specifications" for more details.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 57
PIC16F610/616/16HV610/616
8.4 Comparator Interrupt Operation
FIGURE 8-4:
The comparator interrupt flag can be set whenever there is a change in the output value of the comparator. Changes are recognized by means of a mismatch circuit which consists of two latches and an exclusive-or gate (see Figure 8-2 and Figure 8-3). One latch is updated with the comparator output level when the CMxCON0 register is read. This latch retains the value until the next read of the CMxCON0 register or the occurrence of a Reset. The other latch of the mismatch circuit is updated on every Q1 system clock. A mismatch condition will occur when a comparator output change is clocked through the second latch on the Q1 clock cycle. At this point the two mismatch latches have opposite output levels which is detected by the exclusive-or gate and fed to the interrupt circuitry. The mismatch condition persists until either the CMxCON0 register is read or the comparator output returns to the previous state. Note 1: A write operation to the CMxCON0 register will also clear the mismatch condition because all writes include a read operation at the beginning of the write cycle. 2: Comparator interrupts will operate correctly regardless of the state of CxOE. The comparator interrupt is set by the mismatch edge and not the mismatch level. This means that the interrupt flag can be reset without the additional step of reading or writing the CMxCON0 register to clear the mismatch registers. When the mismatch registers are cleared, an interrupt will occur upon the comparator's return to the previous state, otherwise no interrupt will be generated. Software will need to maintain information about the status of the comparator output, as read from the CMxCON0 register, or CM2CON1 register, to determine the actual change that has occurred. The CxIF bit of the PIR1 register is the comparator interrupt flag. This bit must be reset in software by clearing it to `0'. Since it is also possible to write a `1' to this register, an interrupt can be generated. The CxIE bit of the PIE1 register and the PEIE and GIE bits of the INTCON register must all be set to enable comparator interrupts. If any of these bits are cleared, the interrupt is not enabled, although the CxIF bit of the PIR1 register will still be set if an interrupt condition occurs. Note 1: If a change in the CMxCON0 register (CxOUT) should occur when a read operation is being executed (start of the Q2 cycle), then the CxIF of the PIR1 register interrupt flag may not get set. 2: When either comparator is first enabled, bias circuitry in the comparator module may cause an invalid output from the comparator until the bias circuitry is stable. Allow about 1 s for bias settling then clear the mismatch condition and interrupt flags before enabling comparator interrupts.
COMPARATOR INTERRUPT TIMING W/O CMxCON0 READ
Q1 Q3 CxIN+ CxOUT Set CxIF (edge) CxIF reset by software TRT
FIGURE 8-5:
COMPARATOR INTERRUPT TIMING WITH CMxCON0 READ
Q1 Q3 CxIN+ CxOUT Set CxIF (edge) CxIF cleared by CMxCON0 read reset by software TRT
DS41288C-page 58
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
8.5 Operation During Sleep
The comparator, if enabled before entering Sleep mode, remains active during Sleep. The additional current consumed by the comparator is shown separately in Section 15.0 "Electrical Specifications". If the comparator is not used to wake the device, power consumption can be minimized while in Sleep mode by turning off the comparator. Each comparator is turned off by clearing the CxON bit of the CMxCON0 register. A change to the comparator output can wake-up the device from Sleep. To enable the comparator to wake the device from Sleep, the CxIE bit of the PIE1 register and the PEIE bit of the INTCON register must be set. The instruction following the Sleep instruction always executes following a wake from Sleep. If the GIE bit of the INTCON register is also set, the device will then execute the interrupt service routine.
8.6
Effects of a Reset
A device Reset forces the CMxCON0 and CM2CON1 registers to their Reset states. This forces both comparators and the voltage references to their OFF states.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 59
PIC16F610/616/16HV610/616
REGISTER 8-1:
R/W-0 C1ON bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
CM1CON0: COMPARATOR 1 CONTROL REGISTER 0
R-0 C1OUT R/W-0 C1OE R/W-0 C1POL U-0 -- R/W-0 C1R R/W-0 C1CH1 R/W-0 C1CH0 bit 0
C1ON: Comparator C1 Enable bit 1 = Comparator C1 is enabled 0 = Comparator C1 is disabled C1OUT: Comparator C1 Output bit If C1POL = 1 (inverted polarity): C1OUT = 0 when C1VIN+ > C1VINC1OUT = 1 when C1VIN+ < C1VINIf C1POL = 0 (non-inverted polarity): C1OUT = 1 when C1VIN+ > C1VINC1OUT = 0 when C1VIN+ < C1VINC1OE: Comparator C1 Output Enable bit 1 = C1OUT is present on the C1OUT pin(1) 0 = C1OUT is internal only C1POL: Comparator C1 Output Polarity Select bit 1 = C1OUT logic is inverted 0 = C1OUT logic is not inverted Unimplemented: Read as `0' C1R: Comparator C1 Reference Select bit (non-inverting input) 1 = C1VIN+ connects to C1VREF output 0 = C1VIN+ connects to C1IN+ pin C1CH<1:0>: Comparator C1 Channel Select bit 00 = C12IN0- pin of C1 connects to C1VIN01 = C12IN1- pin of C1 connects to C1VIN10 = C12IN2- pin of C1 connects to C1VIN11 = C12IN3- pin of C1 connects to C1VINComparator output requires the following three conditions: C1OE = 1, C1ON = 1 and corresponding port TRIS bit = 0.
bit 6
bit 5
bit 4
bit 3 bit 2
bit 1-0
Note 1:
DS41288C-page 60
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 8-2:
R/W-0 C2ON bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
CM2CON0: COMPARATOR 2 CONTROL REGISTER 0
R-0 C2OUT R/W-0 C2OE R/W-0 C2POL U-0 -- R/W-0 C2R R/W-0 C2CH1 R/W-0 C2CH0 bit 0
C2ON: Comparator C2 Enable bit 1 = Comparator C2 is enabled 0 = Comparator C2 is disabled C2OUT: Comparator C2 Output bit If C2POL = 1 (inverted polarity): C2OUT = 0 when C2VIN+ > C2VINC2OUT = 1 when C2VIN+ < C2VINIf C2POL = 0 (non-inverted polarity): C2OUT = 1 when C2VIN+ > C2VINC2OUT = 0 when C2VIN+ < C2VINC2OE: Comparator C2 Output Enable bit 1 = C2OUT is present on C2OUT pin(1) 0 = C2OUT is internal only C2POL: Comparator C2 Output Polarity Select bit 1 = C2OUT logic is inverted 0 = C2OUT logic is not inverted Unimplemented: Read as `0' C2R: Comparator C2 Reference Select bits (non-inverting input) 1 = C2VIN+ connects to C2VREF 0 = C2VIN+ connects to C2IN+ pin C2CH<1:0>: Comparator C2 Channel Select bits 00 = C2VIN- pin of C2 connects to C12IN001 = C2VIN- pin of C2 connects to C12IN110 = C2VIN- pin of C2 connects to C12IN211 = C2VIN- pin of C2 connects to C12IN3Comparator output requires the following three conditions: C2OE = 1, C2ON = 1 and corresponding port TRIS bit = 0.
bit 6
bit 5
bit 4
bit 3 bit 2
bit 1-0
Note 1:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 61
PIC16F610/616/16HV610/616
8.7 Comparator Analog Input Connection Considerations
Note 1: When reading a PORT register, all pins configured as analog inputs will read as a `0'. Pins configured as digital inputs will convert as an analog input, according to the input specification. 2: Analog levels on any pin defined as a digital input, may cause the input buffer to consume more current than is specified.
A simplified circuit for an analog input is shown in Figure 8-6. Since the analog input pins share their connection with a digital input, they have reverse biased ESD protection diodes to VDD and VSS. The analog input, therefore, must be between VSS and VDD. If the input voltage deviates from this range by more than 0.6V in either direction, one of the diodes is forward biased and a latch-up may occur. A maximum source impedance of 10 k is recommended for the analog sources. Also, any external component connected to an analog input pin, such as a capacitor or a Zener diode, should have very little leakage current to minimize inaccuracies introduced.
FIGURE 8-6:
ANALOG INPUT MODEL
VDD
Rs < 10K AIN VA CPIN 5 pF
VT 0.6V
RIC To ADC Input
VT 0.6V
ILEAKAGE 500 nA
Vss Legend: CPIN = Input Capacitance ILEAKAGE = Leakage Current at the pin due to various junctions RIC = Interconnect Resistance = Source Impedance RS = Analog Voltage VA VT = Threshold Voltage
DS41288C-page 62
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
8.8 Additional Comparator Features
8.8.2
There are three additional comparator features: * Timer1 count enable (gate) * Synchronizing output with Timer1 * Simultaneous read of comparator outputs
SYNCHRONIZING COMPARATOR C2 OUTPUT TO TIMER1
8.8.1
COMPARATOR C2 GATING TIMER1
This feature can be used to time the duration or interval of analog events. Clearing the T1GSS bit of the CM2CON1 register will enable Timer1 to increment based on the output of Comparator C2. This requires that Timer1 is on and gating is enabled. See Section 6.0 "Timer1 Module with Gate Control" for details. It is recommended to synchronize the comparator with Timer1 by setting the C2SYNC bit when the comparator is used as the Timer1 gate source. This ensures Timer1 does not miss an increment if the comparator changes during an increment.
The Comparator C2 output can be synchronized with Timer1 by setting the C2SYNC bit of the CM2CON1 register. When enabled, the C2 output is latched on the falling edge of the Timer1 clock source. If a prescaler is used with Timer1, the comparator output is latched after the prescaling function. To prevent a race condition, the comparator output is latched on the falling edge of the Timer1 clock source and Timer1 increments on the rising edge of its clock source. See the Comparator Block Diagram (Figure 8-3) and the Timer1 Block Diagram (Figure 6-1) for more information.
8.8.3
SIMULTANEOUS COMPARATOR OUTPUT READ
The MC1OUT and MC2OUT bits of the CM2CON1 register are mirror copies of both comparator outputs. The ability to read both outputs simultaneously from a single register eliminates the timing skew of reading separate registers. Note 1: Obtaining the status of C1OUT or C2OUT by reading CM2CON1 does not affect the comparator interrupt mismatch registers.
REGISTER 8-3:
R-0 MC1OUT bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6 bit 5 bit 4
CM2CON1: COMPARATOR 2 CONTROL REGISTER 1
R-0 MC2OUT U-0 -- R/W-0 T1ACS R/W-0 C1HYS R/W-0 C2HYS R/W-1 T1GSS R/W-0 C2SYNC bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
MC1OUT: Mirror Copy of C1OUT bit MC2OUT: Mirror Copy of C2OUT bit Unimplemented: Read as `0' T1ACS: Timer1 Alternate Clock Select bit 1 = Timer1 clock source is the system clock (FOSC) 0 = Timer1 clock source is the internal clock FOSC/4) C1HYS: Comparator C1 Hysteresis Enable bit 1 = Comparator C1 Hysteresis enabled 0 = Comparator C1 Hysteresis disabled C2HYS: Comparator C2 Hysteresis Enable bit 1 = Comparator C2 Hysteresis enabled 0 = Comparator C2 Hysteresis disabled T1GSS: Timer1 Gate Source Select bit 1 = Timer1 gate source is T1G 0 = Timer1 gate source is SYNCC2OUT. C2SYNC: Comparator C2 Output Synchronization bit 1 = C2 Output is synchronous to falling edge of Timer1 clock 0 = C2 Output is asynchronous
bit 3
bit 2
bit 1
bit 0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 63
PIC16F610/616/16HV610/616
8.9 Comparator Hysteresis
Each comparator has built-in hysteresis that is user enabled by setting the C1HYS or C2HYS bits of the CM2CON1 register. The hysteresis feature can help filter noise and reduce multiple comparator output transitions when the output is changing state. Figure 8-9 shows the relationship between the analog input levels and digital output of a comparator with and without hysteresis. The output of the comparator changes from a low state to a high state only when the analog voltage at VIN+ rises above the upper hysteresis threshold (VH+). The output of the comparator changes from a high state to a low state only when the analog voltage at VIN+ falls below the lower hysteresis threshold (VH-).
FIGURE 8-7:
COMPARATOR HYSTERESIS
VIN+ VIN-
+ Output -
V+
VH+ VINVHVIN+
Output (Without Hysteresis)
Output (With Hysteresis)
Note:
The black areas of the comparator output represents the uncertainty due to input offsets and response time.
DS41288C-page 64
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 8-2: SUMMARY OF REGISTERS ASSOCIATED WITH THE COMPARATOR AND VOLTAGE REFERENCE MODULES
Bit 7 ANS7 C1ON C2ON MC1OUT GIE -- -- -- -- SR1 SRCS1 -- Bit 6 ANS6 C1OUT C2OUT MC2OUT PEIE ADIE(1) ADIF(1) -- -- SR0 SRCS0 -- Bit 5 ANS5 C1OE C2OE -- T0IE CCP1IE(1) CCP1IF(1) RA5 RC5 C1SEN -- TRISA5 TRISC5 C1VREN C2VREN VRR Bit 4 ANS4 C1POL C2POL T1ACS INTE C2IE C2IF RA4 RC4 C2REN -- TRISA4 TRISC4 FVREN Bit 3 ANS3 C1SP C2SP C1HYS RAIE C1IE C1IF RA3 RC3 PULSS -- TRISA3 TRISC3 VR3 Bit 2 ANS2 C1R C2R C2HYS T0IF -- -- RA2 RC2 PULSR -- TRISA2 TRISC2 VR2 Bit 1 ANS1 C1CH1 C2CH1 T1GSS INTF TMR2IE(1) TMR2IF(1) RA1 RC1 -- -- TRISA1 TRISC1 VR1 Bit 0 ANS0 C1CH0 C2CH0 C2SYNC RAIF TMR1IE TMR1IF RA0 RC0 SRCLKEN -- TRISA0 TRISC0 VR0 Value on POR, BOR 1111 1111 0000 0000 0000 0000 00-0 0010 0000 000x -000 0-00 -000 0-00 --x0 x000 --xx 00xx 0000 00-0 00-- -----11 1111 1111 1111 0000 0000 Value on all other Resets 1111 1111 0000 0000 0000 0000 00-0 0010 0000 000x -000 0-00 -000 0-00 --x0 x000 --uu 00uu 0000 00-0 00-- -----11 1111 1111 1111 0000 0000
Name ANSEL CM1CON0 CM2CON0 CM2CON1 INTCON PIE1 PIR1 PORTA PORTC SRCON0 SRCON1 TRISA TRISC VRCON Legend: Note 1:
x = unknown, u = unchanged, - = unimplemented, read as `0'. Shaded cells are not used for comparator. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 65
PIC16F610/616/16HV610/616
8.10 Comparator SR Latch
The SR latch module provides additional control of the comparator outputs. The module consists of a single SR latch and output multiplexers. The SR latch can be set, reset or toggled by the comparator outputs. The SR latch may also be set or reset, independent of comparator output, by control bits in the SRCON0 control register. The SR latch output multiplexers select whether the latch outputs or the comparator outputs are directed to the I/O port logic for eventual output to a pin. The SR latch also has a variable clock, which is connected to the set input of the latch. The SRCLKEN bit of SRCON0 enables the SR latch set clock. The clock will periodically pulse the set input of the latch. Control over the frequency of the SR latch set clock is provided by the SRCS<1:0> bits of SRCON1 register. inputs are high the latch will go to the Reset state. Both the PULSS and PULSR bits are self resetting which means that a single write to either of the bits is all that is necessary to complete a latch Set or Reset operation.
8.10.2
LATCH OUTPUT
The SR<1:0> bits of the SRCON0 register control the latch output multiplexers and determine four possible output configurations. In these four configurations, the CxOUT I/O port logic is connected to: * * * * C1OUT and C2OUT C1OUT and SR latch Q C2OUT and SR latch Q SR latch Q and Q
8.10.1
LATCH OPERATION
After any Reset, the default output configuration is the unlatched C1OUT and C2OUT mode. This maintains compatibility with devices that do not have the SR latch feature. The applicable TRIS bits of the corresponding ports must be cleared to enable the port pin output drivers. Additionally, the CxOE comparator output enable bits of the CMxCON0 registers must be set in order to make the comparator or latch outputs available on the output pins. The latch configuration enable states are completely independent of the enable states for the comparators.
The latch is a Set-Reset latch that does not depend on a clock source. Each of the Set and Reset inputs are active-high. Each latch input is connected to a comparator output and a software controlled pulse generator. The latch can be set by C1OUT or the PULSS bit of the SRCON0 register. The latch can be reset by C2OUT or the PULSR bit of the SRCON0 register. The latch is reset-dominant, therefore, if both Set and Reset
FIGURE 8-8:
SR LATCH SIMPLIFIED BLOCK DIAGRAM
SRCLKEN SRCLK
SR0 C1OE
PULSS
Pulse Gen(2)
C1OUT (from comparator) C1SEN
S
Q
0 MUX 1
C1OUT pin(3)
SR Latch(1) SYNCC2OUT (from comparator) C2REN R Q 1 MUX 0 SR1
C2OE
C2OUT pin(3)
PULSR
Pulse Gen(2)
Note 1: 2: 3:
If R = 1 and S = 1 simultaneously, Q = 0, Q = 1 Pulse generator causes a 1 TOSC pulse width. Output shown for reference only. See I/O port pin block diagram for more detail.
DS41288C-page 66
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 8-4:
R/W-0 SR1(2) bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set S = Bit is set only U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
SRCON0: SR LATCH CONTROL 0 REGISTER
R/W-0 SR0(2) R/W-0 C1SEN R/W-0 C2REN R/S-0 PULSS R/S-0 PULSR U-0 -- R/W-0 SRCLKEN bit 0
SR1: SR Latch Configuration bit(2) 1= C2OUT pin is the latch Q output 0= C2OUT pin is the C2 comparator output SR0: SR Latch Configuration bits(2) 1= C1OUT pin is the latch Q output 0= C1OUT pin is the C1 Comparator output C1SEN: C1 Set Enable bit 1 = C1 comparator output sets SR latch 0 = C1 comparator output has no effect on SR latch C2REN: C2 Reset Enable bit 1 = C2 comparator output resets SR latch 0 = C2 comparator output has no effect on SR latch PULSS: Pulse the SET Input of the SR Latch bit 1 = Triggers pulse generator to set SR latch. Bit is immediately reset by hardware. 0 = Does not trigger pulse generator PULSR: Pulse the Reset Input of the SR Latch bit 1 = Triggers pulse generator to reset SR latch. Bit is immediately reset by hardware. 0 = Does not trigger pulse generator Unimplemented: Read as `0' SRCLKEN: SR Latch Set Clock Enable bit 1 = Set input of SR latch is pulsed with SRCLK 0 = Set input of SR latch is not pulsed with the SRCLK The C1OUT and C2OUT bits in the CMxCON0 register will always reflect the actual comparator output (not the level on the pin), regardless of the SR latch operation. To enable an SR Latch output to the pin, the appropriate CxOE, and TRIS bits must be properly configured.
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1 bit 0
Note 1: 2:
REGISTER 8-5:
R/W-0 SRCS1 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6
SRCON1: SR LATCH CONTROL 1 REGISTER
R/W-0 SRCS0 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 0 S = Bit is set only W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
SRCS<1:0>: SR Latch Clock Prescale bits 00 = FOSC/16 01 = FOSC/32 10 = FOSC/64 11 = FOSC/128 Unimplemented: Read as `0'
bit 5-0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 67
PIC16F610/616/16HV610/616
8.11 Comparator Voltage Reference
8.11.3 OUTPUT CLAMPED TO VSS
The comparator voltage reference module provides an internally generated voltage reference for the comparators. The following features are available: * * * * * Independent from Comparator operation Two 16-level voltage ranges Output clamped to VSS Ratiometric with VDD Fixed Reference (0.6V) The fixed voltage reference output voltage can be set to Vss with no power consumption by clearing the FVREN bit of the VRCON register (FVREN = 0). This allows the comparator to detect a zero-crossing while not consuming additional module current.
8.11.4
OUTPUT RATIOMETRIC TO VDD
The VRCON register (Register 8-6) controls the voltage reference module shown in Figure 8-9.
The comparator voltage reference is VDD derived and therefore, the CVREF output changes with fluctuations in VDD. The tested absolute accuracy of the Comparator Voltage Reference can be found in Section 15.0 "Electrical Specifications".
8.11.1
INDEPENDENT OPERATION
The comparator voltage reference is independent of the comparator configuration. Setting the FVREN bit of the VRCON register will enable the voltage reference.
8.11.2
OUTPUT VOLTAGE SELECTION
The CVREF voltage reference has 2 ranges with 16 voltage levels in each range. Range selection is controlled by the VRR bit of the VRCON register. The 16 levels are set with the VR<3:0> bits of the VRCON register.
The CVREF output voltage is determined by the following
equations:
EQUATION 8-1:
CVREF OUTPUT VOLTAGE
VRR = 1 (low range): CVREF = (VR<3:0>/24) x VDD VRR = 0 (high range): CVREF = (VDD/4) + (VR<3:0> x VDD/32) The full range of VSS to VDD cannot be realized due to the construction of the module. See Figure 8-9.
DS41288C-page 68
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
8.11.5 FIXED VOLTAGE REFERENCE 8.11.7
The fixed voltage reference is independent of VDD, with a nominal output voltage of 0.6V. This reference can be enabled by setting the FVREN bit of the VRCON register to `1'. This reference is always enabled when the HFINTOSC oscillator is active.
VOLTAGE REFERENCE SELECTION
Multiplexers on the output of the voltage reference module enable selection of either the CVREF or fixed voltage reference for use by the comparators. Setting the C1VREN bit of the VRCON register enables current to flow in the CVREF voltage divider and selects the CVREF voltage for use by C1. Clearing the C1VREN bit selects the fixed voltage for use by C1. Setting the C2VREN bit of the VRCON register enables current to flow in the CVREF voltage divider and selects the CVREF voltage for use by C2. Clearing the C2VREN bit selects the fixed voltage for use by C2. When both the C1VREN and C2VREN bits are cleared, current flow in the CVREF voltage divider is disabled minimizing the power drain of the voltage reference peripheral.
8.11.6
FIXED VOLTAGE REFERENCE STABILIZATION PERIOD
When the fixed voltage reference module is enabled, it will require some time for the reference and its amplifier circuits to stabilize. The user program must include a small delay routine to allow the module to settle. See the electrical specifications section for the minimum delay requirement.
FIGURE 8-9:
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
16 Stages 8R R R R R
VDD 8R Analog MUX 15 CVREF To Comparators and ADC Module 0 VR<3:0>(1) C1VREN C2VREN 4 VRR
To ADC Module
1.2V
FVREN EN Fixed Voltage Reference
Fixed Ref To Comparators and ADC Module
0.6V
Note 1:
Care should be taken to ensure VREF remains within the comparator common mode input range. See Section 15.0 "Electrical Specifications" for more detail.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 69
PIC16F610/616/16HV610/616
REGISTER 8-6:
R/W-0 C1VREN bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
VRCON: VOLTAGE REFERENCE CONTROL REGISTER
R/W-0 C2VREN R/W-0 VRR R/W-0 FVREN R/W-0 VR3 R/W-0 VR2 R/W-0 VR1 R/W-0 VR0 bit 0
C1VREN: Comparator 1 Voltage Reference Enable bit 1 = CVREF circuit powered on and routed to C1VREF input of Comparator C1 0 = 0.6 Volt constant reference routed to C1VREF input of Comparator C1 C2VREN: Comparator 2 Voltage Reference Enable bit 1 = CVREF circuit powered on and routed to C2VREF input of Comparator C2 0 = 0.6 Volt constant reference routed to C2VREF input of Comparator C2 VRR: CVREF Range Selection bit 1 = Low range 0 = High range FVREN: Fixed Voltage Reference (0.6V) Enable bit 1 = Enabled 0 = Disabled VR<3:0>: Comparator Voltage Reference CVREF Value Selection bits (0 VR<3:0> 15) When VRR = 1: CVREF = (VR<3:0>/24) * VDD When VRR = 0: CVREF = VDD/4 + (VR<3:0>/32) * VDD
bit 6
bit 5
bit 4
bit 3-0
DS41288C-page 70
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
9.0 ANALOG-TO-DIGITAL CONVERTER (ADC) MODULE (PIC16F616/16HV616 ONLY)
The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-bit binary representation of that signal. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The output of the sample and hold is connected to the input of the converter. The converter generates a 10-bit binary result via successive approximation and stores the conversion result into the ADC result registers (ADRESL and ADRESH). The ADC voltage reference is software selectable to either VDD or a voltage applied to the external reference pins. The ADC can generate an interrupt upon completion of a conversion. This interrupt can be used to wake-up the device from Sleep. Figure 9-1 shows the block diagram of the ADC.
FIGURE 9-1:
ADC BLOCK DIAGRAM
VDD VCFG = 0 VREF VCFG = 1
RA0/AN0 RA1/AN1/VREF RA2/AN2 RA4/AN3 RC0/AN4 RC1/AN5 RC2/AN6 RC3/AN7 CVREF 0.6V Reference 1.2V Reference 4 CHS <3:0> ADON VSS ADRESH ADFM GO/DONE ADC 10 0 = Left Justify 1 = Right Justify 10 ADRESL
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 71
PIC16F610/616/16HV610/616
9.1 ADC Configuration
9.1.4 CONVERSION CLOCK
When configuring and using the ADC, the following functions must be considered: * * * * * * Port configuration Channel selection ADC voltage reference selection ADC conversion clock source Interrupt control Results formatting The source of the conversion clock is software selectable via the ADCS bits of the ADCON1 register. There are seven possible clock options: * * * * * * * FOSC/2 FOSC/4 FOSC/8 FOSC/16 FOSC/32 FOSC/64 FRC (dedicated internal oscillator)
9.1.1
PORT CONFIGURATION
The ADC can be used to convert both analog and digital signals. When converting analog signals, the I/O pin should be configured for analog by setting the associated TRIS and ANSEL bits. See the corresponding Port section for more information. Note: Analog voltages on any pin that is defined as a digital input may cause the input buffer to conduct excess current.
The time to complete one bit conversion is defined as TAD. One full 10-bit conversion requires 11 TAD periods as shown in Figure 9-3. For correct conversion, the appropriate TAD specification must be met. See A/D conversion requirements in Section 15.0 "Electrical Specifications" for more information. Table 9-1 gives examples of appropriate ADC clock selections. Note: Unless using the FRC, any changes in the system clock frequency will change the ADC clock frequency, which may adversely affect the ADC result.
9.1.2
CHANNEL SELECTION
The CHS bits of the ADCON0 register determine which channel is connected to the sample and hold circuit. When changing channels, a delay is required before starting the next conversion. Refer to Section 9.2 "ADC Operation" for more information.
9.1.3
ADC VOLTAGE REFERENCE
The VCFG bit of the ADCON0 register provides control of the positive voltage reference. The positive voltage reference can be either VDD or an external voltage source. The negative voltage reference is always connected to the ground reference.
TABLE 9-1:
ADC CLOCK PERIOD (TAD) VS. DEVICE OPERATING FREQUENCIES (VDD > 3.0V)
Device Frequency (FOSC) 20 MHz 100 400 ns(2) ns(2) 200 ns(2) 800 ns(2) 1.6 s 3.2 s 2-6 s(1,4) 8 MHz 250 1.0 ns(2) s(2) 500 ns(2) 2.0 s 4.0 s 8.0 s(3) 2-6 s(1,4) 4 MHz 500 ns(2) 1.0 s(2) 2.0 s 4.0 s 8.0 2-6 s(3) 16.0 s(3) s(1,4) 1 MHz 2.0 s 4.0 s 8.0 s(3) 16.0 s(3) 32.0 s(3) 64.0 s(3) 2-6 s(1,4)
ADC Clock Period (TAD) ADC Clock Source FOSC/2 FOSC/4 FOSC/8 FOSC/16 FOSC/32 FOSC/64 FRC Legend: Note 1: 2: 3: 4: ADCS<2:0> 000 100 001 101 010 110 x11
Shaded cells are outside of recommended range. The FRC source has a typical TAD time of 4 s for VDD > 3.0V. These values violate the minimum required TAD time. For faster conversion times, the selection of another clock source is recommended. When the device frequency is greater than 1 MHz, the FRC clock source is only recommended if the conversion will be performed during Sleep.
DS41288C-page 72
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 9-2: ANALOG-TO-DIGITAL CONVERSION TAD CYCLES
TCY to TAD TAD1 TAD2 TAD3 TAD4 TAD5 TAD6 TAD7 TAD8 TAD9 TAD10 TAD11 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Conversion Starts Holding Capacitor is Disconnected from Analog Input (typically 100 ns) Set GO/DONE bit ADRESH and ADRESL registers are loaded, GO bit is cleared, ADIF bit is set, Holding capacitor is connected to analog input
9.1.5
INTERRUPTS
9.1.6
RESULT FORMATTING
The ADC module allows for the ability to generate an interrupt upon completion of an analog-to-digital conversion. The ADC interrupt flag is the ADIF bit in the PIR1 register. The ADC interrupt enable is the ADIE bit in the PIE1 register. The ADIF bit must be cleared in software. Note: The ADIF bit is set at the completion of every conversion, regardless of whether or not the ADC interrupt is enabled.
The 10-bit A/D conversion result can be supplied in two formats, left justified or right justified. The ADFM bit of the ADCON0 register controls the output format. Figure 9-4 shows the two output formats.
This interrupt can be generated while the device is operating or while in Sleep. If the device is in Sleep, the interrupt will wake-up the device. Upon waking from Sleep, the next instruction following the SLEEP instruction is always executed. If the user is attempting to wake-up from Sleep and resume in-line code execution, the global interrupt must be disabled. If the global interrupt is enabled, execution will switch to the interrupt service routine. Please see Section 9.1.5 "Interrupts" for more information.
FIGURE 9-3:
10-BIT A/D CONVERSION RESULT FORMAT
ADRESH ADRESL LSB bit 0 10-bit A/D Result bit 7 bit 0 Unimplemented: Read as `0' LSB bit 0 bit 7 10-bit A/D Result bit 0
(ADFM = 0)
MSB bit 7
(ADFM = 1) bit 7 Unimplemented: Read as `0'
MSB
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 73
PIC16F610/616/16HV610/616
9.2
9.2.1
ADC Operation
STARTING A CONVERSION
9.2.5
SPECIAL EVENT TRIGGER
To enable the ADC module, the ADON bit of the ADCON0 register must be set to a `1'. Setting the GO/ DONE bit of the ADCON0 register to a `1' will start the analog-to-digital conversion. Note: The GO/DONE bit should not be set in the same instruction that turns on the ADC. Refer to Section 9.2.6 "A/D Conversion Procedure".
The ECCP Special Event Trigger allows periodic ADC measurements without software intervention. When this trigger occurs, the GO/DONE bit is set by hardware and the Timer1 counter resets to zero. Using the Special Event Trigger does not ensure proper ADC timing. It is the user's responsibility to ensure that the ADC timing requirements are met. See Section 10.0 "Enhanced Capture/Compare/ PWM (With Auto-Shutdown and Dead Band) Module (PIC16F616/16HV616 Only)" for more information.
9.2.2
COMPLETION OF A CONVERSION
When the conversion is complete, the ADC module will: * Clear the GO/DONE bit * Set the ADIF flag bit * Update the ADRESH:ADRESL registers with new conversion result
9.2.6
A/D CONVERSION PROCEDURE
This is an example procedure for using the ADC to perform an analog-to-digital conversion: 1. Configure Port: * Disable pin output driver (See TRIS register) * Configure pin as analog Configure the ADC module: * Select ADC conversion clock * Configure voltage reference * Select ADC input channel * Select result format * Turn on ADC module Configure ADC interrupt (optional): * Clear ADC interrupt flag * Enable ADC interrupt * Enable peripheral interrupt * Enable global interrupt(1) Wait the required acquisition time(2). Start conversion by setting the GO/DONE bit. Wait for ADC conversion to complete by one of the following: * Polling the GO/DONE bit * Waiting for the ADC interrupt (interrupts enabled) Read ADC Result Clear the ADC interrupt flag (required if interrupt is enabled). Note 1: The global interrupt may be disabled if the user is attempting to wake-up from Sleep and resume in-line code execution. 2: See Section 9.3 Requirements". "A/D Acquisition
9.2.3
TERMINATING A CONVERSION
2.
If a conversion must be terminated before completion, the GO/DONE bit can be cleared in software. The ADRESH:ADRESL registers will not be updated with the partially complete analog-to-digital conversion sample. Instead, the ADRESH:ADRESL register pair will retain the value of the previous conversion. Additionally, a 2 TAD delay is required before another acquisition can be initiated. Following this delay, an input acquisition is automatically started on the selected channel. Note: A device Reset forces all registers to their Reset state. Thus, the ADC module is turned off and any pending conversion is terminated.
3.
4. 5. 6.
9.2.4
ADC OPERATION DURING SLEEP
The ADC module can operate during Sleep. This requires the ADC clock source to be set to the FRC option. When the FRC clock source is selected, the ADC waits one additional instruction before starting the conversion. This allows the SLEEP instruction to be executed, which can reduce system noise during the conversion. If the ADC interrupt is enabled, the device will wake-up from Sleep when the conversion completes. If the ADC interrupt is disabled, the ADC module is turned off after the conversion completes, although the ADON bit remains set. When the ADC clock source is something other than FRC, a SLEEP instruction causes the present conversion to be aborted and the ADC module is turned off, although the ADON bit remains set.
7. 8.
DS41288C-page 74
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
EXAMPLE 9-1: A/D CONVERSION
;This code block configures the ADC ;for polling, Vdd reference, Frc clock ;and AN0 input. ; ;Conversion start & polling for completion ; are included. ; BANKSEL ADCON1 ; MOVLW B'01110000' ;ADC Frc clock MOVWF ADCON1 ; BANKSEL TRISA ; BSF TRISA,0 ;Set RA0 to input BANKSEL ANSEL ; BSF ANSEL,0 ;Set RA0 to analog BANKSEL ADCON0 ; MOVLW B'10000001' ;Right justify, MOVWF ADCON0 ;Vdd Vref, AN0, On CALL SampleTime ;Acquisiton delay BSF ADCON0,GO ;Start conversion BTFSC ADCON0,GO ;Is conversion done? GOTO $-1 ;No, test again BANKSEL ADRESH ; MOVF ADRESH,W ;Read upper 2 bits MOVWF RESULTHI ;store in GPR space BANKSEL ADRESL ; MOVF ADRESL,W ;Read lower 8 bits MOVWF RESULTLO ;Store in GPR space
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 75
PIC16F610/616/16HV610/616
9.2.7 ADC REGISTER DEFINITIONS
The following registers are used to control the operation of the ADC.
REGISTER 9-1:
R/W-0 ADFM bit 7 Legend: R = Readable bit -n = Value at POR bit 7
ADCON0: A/D CONTROL REGISTER 0
R/W-0 VCFG R/W-0 CHS3 R/W-0 CHS2 R/W-0 CHS1 R/W-0 CHS0 R/W-0 GO/DONE R/W-0 ADON bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ADFM: A/D Conversion Result Format Select bit 1 = Right justified 0 = Left justified VCFG: Voltage Reference bit 1 = VREF pin 0 = VDD CHS<3:0>: Analog Channel Select bits 0000 = Channel 00 (AN0) 0001 = Channel 01 (AN1) 0010 = Channel 02 (AN2) 0011 = Channel 03 (AN3) 0100 = Channel 04 (AN4) 0101 = Channel 05 (AN5) 0110 = Channel 06 (AN6) 0111 = Channel 07 (AN7) 1000 = Reserved - do not use 1001 = Reserved - do not use 1010 = Reserved - do not use 1011 = Reserved - do not use 1100 = CVREF 1101 = 0.6V Fixed Voltage Reference(1) 1110 = 1.2V Fixed Voltage Reference(1) 1111 = Reserved - do not use GO/DONE: A/D Conversion Status bit 1 = A/D conversion cycle in progress. Setting this bit starts an A/D conversion cycle. This bit is automatically cleared by hardware when the A/D conversion has completed. 0 = A/D conversion completed/not in progress ADON: ADC Enable bit 1 = ADC is enabled 0 = ADC is disabled and consumes no operating current When the CHS<3:0> bits change to select the 1.2V or 0.6V Fixed Voltage Reference, the reference output voltage will have a transient. If the Comparator module uses this VP6 reference voltage, the comparator output may momentarily change state due to the transient.
bit 6
bit 5-2
bit 1
bit 0
Note 1:
DS41288C-page 76
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 9-2:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7 bit 6-4 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ADCON1: A/D CONTROL REGISTER 1
R/W-0 ADCS2 R/W-0 ADCS1 R/W-0 ADCS0 U-0 -- U-0 -- U-0 -- U-0 -- bit 0
Unimplemented: Read as `0' ADCS<2:0>: A/D Conversion Clock Select bits 000 = FOSC/2 001 = FOSC/8 010 = FOSC/32 x11 = FRC (clock derived from a dedicated internal oscillator = 500 kHz max) 100 = FOSC/4 101 = FOSC/16 110 = FOSC/64 Unimplemented: Read as `0'
bit 3-0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 77
PIC16F610/616/16HV610/616
REGISTER 9-3:
R-x ADRES9 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ADRESH: ADC RESULT REGISTER HIGH (ADRESH) ADFM = 0 (READ-ONLY)
R-x ADRES8 R-x ADRES7 R-x ADRES6 R-x ADRES5 R-x ADRES4 R-x ADRES3 R-x ADRES2 bit 0
ADRES<9:2>: ADC Result Register bits Upper 8 bits of 10-bit conversion result
REGISTER 9-4:
R-x ADRES1 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6 bit 5-0
ADRESL: ADC RESULT REGISTER LOW (ADRESL) ADFM = 0 (READ-ONLY)
R-x ADRES0 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ADRES<1:0>: ADC Result Register bits Lower 2 bits of 10-bit conversion result Reserved: Do not use.
REGISTER 9-5:
U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 7-2 bit 1-0
ADRESH: ADC RESULT REGISTER HIGH (ADRESH) ADFM = 1 (READ-ONLY)
U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R-x ADRES9 R-x ADRES8 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
Reserved: Do not use. ADRES<9:8>: ADC Result Register bits Upper 2 bits of 10-bit conversion result
REGISTER 9-6:
R-x ADRES7 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-0
ADRESL: ADC RESULT REGISTER LOW (ADRESL) ADFM = 1 (READ-ONLY)
R-x ADRES6 R-x ADRES5 R-x ADRES4 R-x ADRES3 R-x ADRES2 R-x ADRES1 R-x ADRES0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ADRES<7:0>: ADC Result Register bits Lower 8 bits of 10-bit conversion result
DS41288C-page 78
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
9.3 A/D Acquisition Requirements
For the ADC to meet its specified accuracy, the charge holding capacitor (CHOLD) must be allowed to fully charge to the input channel voltage level. The Analog Input model is shown in Figure 9-4. The source impedance (RS) and the internal sampling switch (RSS) impedance directly affect the time required to charge the capacitor CHOLD. The sampling switch (RSS) impedance varies over the device voltage (VDD), see Figure 9-4. The maximum recommended impedance for analog sources is 10 k. As the source impedance is decreased, the acquisition time may be decreased. After the analog input channel is selected (or changed), an A/D acquisition must be done before the conversion can be started. To calculate the minimum acquisition time, Equation 9-1 may be used. This equation assumes that 1/2 LSb error is used (1024 steps for the ADC). The 1/2 LSb error is the maximum error allowed for the ADC to meet its specified resolution.
EQUATION 9-1: Assumptions:
ACQUISITION TIME EXAMPLE Temperature = 50C and external impedance of 10k 5.0V VDD
TACQ = Amplifier Settling Time + Hold Capacitor Charging Time + Temperature Coefficient = TAMP + TC + TCOFF = 5s + TC + [ ( Temperature - 25C ) ( 0.05s/C ) ] The value for TC can be approximated with the following equations:
1VAPPLIED 1 - ----------- = VCHOLD 2047
--------- RC VAPPLIED 1 - e = VCHOLD -------- 1RC VAPPLIED 1 - e = VAPPLIED 1 - ----------- 2047 - Tc - TC
;[1] VCHOLD charged to within 1/2 lsb
;[2] VCHOLD charge response to VAPPLIED
;combining [1] and [2]
Solving for TC:
TC = - CHOLD ( RIC + RSS + RS ) ln(1/2047) = - 10pF ( 1k + 7k + 10k ) ln(0.0004885)
= 1.37 s Therefore: TACQ = 5S + 1.37S + [ ( 50C- 25C ) ( 0.05S/C ) ] = 7.67S
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself out. 2: The charge holding capacitor (CHOLD) is not discharged after each conversion. 3: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin leakage specification.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 79
PIC16F610/616/16HV610/616
FIGURE 9-4: ANALOG INPUT MODEL
VDD Rs VA ANx CPIN 5 pF VT = 0.6V RIC 1k I LEAKAGE 500 nA Sampling Switch SS Rss
VT = 0.6V
CHOLD = 10 pF VSS/VREF-
Legend: CPIN = Input Capacitance = Threshold Voltage VT I LEAKAGE = Leakage current at the pin due to various junctions RIC = Interconnect Resistance SS = Sampling Switch CHOLD = Sample/Hold Capacitance
6V 5V VDD 4V 3V 2V
RSS
5 6 7 8 9 10 11 Sampling Switch (k)
FIGURE 9-5:
ADC TRANSFER FUNCTION
Full-Scale Range
3FFh 3FEh 3FDh ADC Output Code 3FCh 3FBh Full-Scale Transition 1 LSB ideal
004h 003h 002h 001h 000h 1 LSB ideal
Analog Input Voltage
VSS/VREF-
Zero-Scale Transition
VDD/VREF+
DS41288C-page 80
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 9-2:
Name ADCON0(1) ADCON1(1) ANSEL ADRESH ADRESL INTCON PIE1 PIR1 PORTA PORTC TRISA TRISC Legend: Note 1: Bit 7 ADFM -- ANS
SUMMARY OF ASSOCIATED ADC REGISTERS
Bit 6 VCFG ADCS2 ANS6 Bit 5 CHS3 ADCS1 ANS5 Bit 4 CHS2 ADCS0 ANS4 Bit 3 CHS1 -- ANS3 Bit 2 CHS0 -- ANS2 Bit 1 GO/DONE -- ANS1 Bit 0 ADON -- ANS0 Value on POR, BOR 0000 0000 -000 ---1111 1111 xxxx xxxx xxxx xxxx INTE C2IE C2IF RA4 RC4 TRISA4 TRISC4 RAIE C1IE C1IF RA3 RC3 TRISA3 TRISC3 T0IF -- -- RA2 RC2 TRISA2 TRISC2 INTF TMR2IE(1) TMR2IF(1) RA1 RC1 TRISA1 TRISC1 RAIF TMR1IE TMR1IF RA0 RC0 TRISA0 TRISC0 0000 0000 -000 0-00 -000 0-00 --x0 x000 --xx 00xx --11 1111 --11 1111 Value on all other Resets 0000 0000 -000 ---1111 1111 uuuu uuuu uuuu uuuu 0000 0000 -000 0-00 -000 0-00 --u0 u000 --uu 00uu --11 1111 --11 1111
A/D Result Register High Byte A/D Result Register Low Byte GIE -- -- -- -- -- -- PEIE ADIE(1) ADIF(1) -- -- -- -- T0IE CCP1IE(1) CCP1IF(1) RA5 RC5 TRISA5 TRISC5
x = unknown, u = unchanged, - = unimplemented read as `0'. Shaded cells are not used for ADC module. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 81
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 82
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.0 ENHANCED CAPTURE/ COMPARE/PWM (WITH AUTOSHUTDOWN AND DEAD BAND) MODULE (PIC16F616/16HV616 ONLY)
event when a predetermined amount of time has expired. The PWM mode can generate a Pulse-Width Modulated signal of varying frequency and duty cycle. Table 10-1 shows the timer resources required by the ECCP module.
The Enhanced Capture/Compare/PWM module is a peripheral which allows the user to time and control different events. In Capture mode, the peripheral allows the timing of the duration of an event. The Compare mode allows the user to trigger an external
TABLE 10-1:
ECCP MODE - TIMER RESOURCES REQUIRED
Timer Resource Timer1 Timer1 Timer2
ECCP Mode Capture Compare PWM
REGISTER 10-1:
R/W-0 P1M1 bit 7 Legend: R = Readable bit -n = Value at POR bit 7-6
CCP1CON: ENHANCED CCP1 CONTROL REGISTER
R/W-0 P1M0 R/W-0 DC1B1 R/W-0 DC1B0 R/W-0 CCP1M3 R/W-0 CCP1M2 R/W-0 CCP1M1 R/W-0 CCP1M0 bit 0
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
P1M<1:0>: PWM Output Configuration bits If CCP1M<3:2> = 00, 01, 10: xx = P1A assigned as Capture/Compare input; P1B, P1C, P1D assigned as port pins If CCP1M<3:2> = 11: 00 = Single output; P1A modulated; P1B, P1C, P1D assigned as port pins 01 = Full-Bridge output forward; P1D modulated; P1A active; P1B, P1C inactive 10 = Half-Bridge output; P1A, P1B modulated with dead-time control; P1C, P1D assigned as port pins 11 = Full-Bridge output reverse; P1B modulated; P1C active; P1A, P1D inactive DC1B<1:0>: PWM Duty Cycle Least Significant bits Capture mode: Unused. Compare mode: Unused. PWM mode: These bits are the two LSbs of the PWM duty cycle. The eight MSbs are found in CCPR1L.
CCP1M<3:0>: ECCP Mode Select bits 0000 = Capture/Compare/PWM off (resets ECCP module) 0001 = Unused (reserved) 0010 = Compare mode, toggle output on match (CCP1IF bit is set) 0011 = Unused (reserved) 0100 = Capture mode, every falling edge 0101 = Capture mode, every rising edge 0110 = Capture mode, every 4th rising edge 0111 = Capture mode, every 16th rising edge 1000 = Compare mode, set output on match (CCP1IF bit is set) 1001 = Compare mode, clear output on match (CCP1IF bit is set) 1010 = Compare mode, generate software interrupt on match (CCP1IF bit is set, CCP1 pin is unaffected) 1011 = Compare mode, trigger special event (CCP1IF bit is set; CCP1 resets TMR1 and starts an A/D conversion, if the ADC module is enabled) 1100 = PWM mode; P1A, P1C active-high; P1B, P1D active-high 1101 = PWM mode; P1A, P1C active-high; P1B, P1D active-low 1110 = PWM mode; P1A, P1C active-low; P1B, P1D active-high 1111 = PWM mode; P1A, P1C active-low; P1B, P1D active-low
bit 5-4
bit 3-0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 83
PIC16F610/616/16HV610/616
10.1 Capture Mode
10.1.2 TIMER1 MODE SELECTION
In Capture mode, CCPR1H:CCPR1L captures the 16-bit value of the TMR1 register when an event occurs on pin CCP1. An event is defined as one of the following and is configured by the CCP1M<3:0> bits of the CCP1CON register: * * * * Every falling edge Every rising edge Every 4th rising edge Every 16th rising edge Timer1 must be running in Timer mode or Synchronized Counter mode for the CCP module to use the capture feature. In Asynchronous Counter mode, the capture operation may not work.
10.1.3
SOFTWARE INTERRUPT
When a capture is made, the Interrupt Request Flag bit CCP1IF of the PIR1 register is set. The interrupt flag must be cleared in software. If another capture occurs before the value in the CCPR1H, CCPR1L register pair is read, the old captured value is overwritten by the new captured value (see Figure 10-1).
When the Capture mode is changed, a false capture interrupt may be generated. The user should keep the CCP1IE interrupt enable bit of the PIE1 register clear to avoid false interrupts. Additionally, the user should clear the CCP1IF interrupt flag bit of the PIR1 register following any change in operating mode.
10.1.4
CCP PRESCALER
10.1.1
CCP1 PIN CONFIGURATION
In Capture mode, the CCP1 pin should be configured as an input by setting the associated TRIS control bit. Note: If the CCP1 pin is configured as an output, a write to the port can cause a capture condition.
There are four prescaler settings specified by the CCP1M<3:0> bits of the CCP1CON register. Whenever the CCP module is turned off, or the CCP module is not in Capture mode, the prescaler counter is cleared. Any Reset will clear the prescaler counter. Switching from one capture prescaler to another does not clear the prescaler and may generate a false interrupt. To avoid this unexpected operation, turn the module off by clearing the CCP1CON register before changing the prescaler (see Example 10-1).
FIGURE 10-1:
CAPTURE MODE OPERATION BLOCK DIAGRAM
Set Flag bit CCP1IF (PIR1 register)
EXAMPLE 10-1:
BANKSEL CCP1CON CLRF MOVLW
CHANGING BETWEEN CAPTURE PRESCALERS
Prescaler / 1, 4, 16 CCP1 pin
CCPR1H and Edge Detect Capture Enable TMR1H
CCPR1L
MOVWF
TMR1L
;Set Bank bits to point ;to CCP1CON CCP1CON ;Turn CCP module off NEW_CAPT_PS ;Load the W reg with ; the new prescaler ; move value and CCP ON CCP1CON ;Load CCP1CON with this ; value
CCP1CON<3:0> System Clock (FOSC)
DS41288C-page 84
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 10-2:
Name CCP1CON(1) CCPR1L(1) CCPR1H(1) INTCON PIE1 PIR1 T1CON TMR1L TMR1H TRISA TRISC
SUMMARY OF REGISTERS ASSOCIATED WITH CAPTURE
Bit 7 P1M1 Bit 6 P1M0 Bit 5 DC1B1 Bit 4 DC1B0 Bit 3 CCP1M3 Bit 2 CCP1M2 Bit 1 CCP1M1 Bit 0 CCP1M0 Value on POR, BOR 0000 0000 xxxx xxxx xxxx xxxx RAIE C1IE C1IF T1OSCEN T0IF -- -- T1SYNC INTF TMR2IE(1) TMR2IF(1) TMR1CS RAIF TMR1IE TMR1IF TMR1ON 0000 0000 -000 0-00 -000 0-00 0000 0000 xxxx xxxx xxxx xxxx TRISA1 TRISC1 TRISA0 TRISC0 --11 1111 --11 1111 Value on all other Resets 0000 0000 uuuu uuuu uuuu uuuu 0000 0000 0000 0-00 0000 0-00 uuuu uuuu uuuu uuuu uuuu uuuu --11 1111 --11 1111
Capture/Compare/PWM Register 1 Low Byte Capture/Compare/PWM Register 1 High Byte GIE -- -- T1GINV PEIE ADIE(1) ADIF(1) TMR1GE T0IE CCP1IE(1) CCP1IF(1) T1CKPS1 INTE C2IE C2IF T1CKPS0
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register Holding Register for the Most Significant Byte of the 16-bit TMR1 Register -- -- -- -- TRISA5 TRISC5 TRISA4 TRISC4 TRISA3 TRISC3 TRISA2 TRISC2
Legend: - = Unimplemented locations, read as `0', u = unchanged, x = unknown. Shaded cells are not used by the Capture, Compare and PWM. Note 1: PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 85
PIC16F610/616/16HV610/616
10.2 Compare Mode
10.2.2 TIMER1 MODE SELECTION
In Compare mode, the 16-bit CCPR1 register value is constantly compared against the TMR1 register pair value. When a match occurs, the CCP1 module may: * * * * * Toggle the CCP1 output Set the CCP1 output Clear the CCP1 output Generate a Special Event Trigger Generate a Software Interrupt In Compare mode, Timer1 must be running in either Timer mode or Synchronized Counter mode. The compare operation may not work in Asynchronous Counter mode.
10.2.3
SOFTWARE INTERRUPT MODE
The action on the pin is based on the value of the CCP1M<3:0> control bits of the CCP1CON register. All Compare modes can generate an interrupt.
When Generate Software Interrupt mode is chosen (CCP1M<3:0> = 1010), the CCP1 module does not assert control of the CCP1 pin (see the CCP1CON register).
10.2.4
SPECIAL EVENT TRIGGER
FIGURE 10-2:
COMPARE MODE OPERATION BLOCK DIAGRAM
CCP1CON<3:0> Mode Select Set CCP1IF Interrupt Flag (PIR1) 4 CCPR1H CCPR1L
When Special Event Trigger mode is chosen (CCP1M<3:0> = 1011), the CCP1 module does the following: * Resets Timer1 * Starts an ADC conversion if ADC is enabled The CCP1 module does not assert control of the CCP1 pin in this mode (see the CCP1CON register). The Special Event Trigger output of the CCP occurs immediately upon a match between the TMR1H, TMR1L register pair and the CCPR1H, CCPR1L register pair. The TMR1H, TMR1L register pair is not reset until the next rising edge of the Timer1 clock. This allows the CCPR1H, CCPR1L register pair to effectively provide a 16-bit programmable period register for Timer1. Note 1: The Special Event Trigger from the CCP module does not set interrupt flag bit TMR1IF of the PIR1 register. 2: Removing the match condition by changing the contents of the CCPR1H and CCPR1L register pair, between the clock edge that generates the Special Event Trigger and the clock edge that generates the Timer1 Reset, will preclude the Reset from occurring.
CCP1 Pin Q S R TRIS Output Enable
Output Logic
Match
Comparator TMR1H TMR1L
Special Event Trigger Special Event Trigger will: * Clear TMR1H and TMR1L registers. * NOT set interrupt flag bit TMR1IF of the PIR1 register. * Set the GO/DONE bit to start the ADC conversion.
10.2.1
CCP1 PIN CONFIGURATION
The user must configure the CCP1 pin as an output by clearing the associated TRIS bit. Note: Clearing the CCP1CON register will force the CCP1 compare output latch to the default low level. This is not the PORT I/O data latch.
DS41288C-page 86
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 10-3:
Name CCP1CON(1) CCPR1L(1) CCPR1H(1) INTCON PIE1 PIR1 T1CON TMR1L TMR1H TRISA TRISC
SUMMARY OF REGISTERS ASSOCIATED WITH COMPARE
Bit 7 P1M1 Bit 6 P1M0 Bit 5 DC1B1 Bit 4 DC1B0 Bit 3 CCP1M3 Bit 2 CCP1M2 Bit 1 CCP1M1 Bit 0 CCP1M0 Value on POR, BOR 0000 0000 xxxx xxxx xxxx xxxx RAIE C1IE C1IF T1OSCEN T0IF -- -- T1SYNC INTF TMR2IE(1) TMR2IF(1) TMR1CS RAIF TMR1IE TMR1IF TMR1ON 0000 0000 -000 0-00 -000 0-00 0000 0000 xxxx xxxx xxxx xxxx TRISA1 TRISC1 TRISA0 TRISC0 --11 1111 --11 1111 Value on all other Resets 0000 0000 uuuu uuuu uuuu uuuu 0000 0000 0000 0-00 0000 0-00 uuuu uuuu uuuu uuuu uuuu uuuu --11 1111 --11 1111
Capture/Compare/PWM Register 1 Low Byte Capture/Compare/PWM Register 1 High Byte GIE -- -- T1GINV PEIE ADIE(1) ADIF(1) TMR1GE T0IE CCP1IE(1) CCP1IF(1) T1CKPS1 INTE C2IE C2IF T1CKPS0
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register Holding Register for the Most Significant Byte of the 16-bit TMR1 Register -- -- -- -- TRISA5 TRISC5 TRISA4 TRISC4 TRISA3 TRISC3 TRISA2 TRISC2
Legend: - = Unimplemented locations, read as `0', u = unchanged, x = unknown. Shaded cells are not used by the Capture, Compare and PWM. Note 1: PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 87
PIC16F610/616/16HV610/616
10.3 PWM Mode
The PWM mode generates a Pulse-Width Modulated signal on the CCP1 pin. The duty cycle, period and resolution are determined by the following registers: * * * * PR2 T2CON CCPR1L CCP1CON The PWM output (Figure 10-4) has a time base (period) and a time that the output stays high (duty cycle).
FIGURE 10-4:
Period Pulse Width
CCP PWM OUTPUT
TMR2 = PR2 TMR2 = CCPR1L:CCP1CON<5:4>
In Pulse-Width Modulation (PWM) mode, the CCP module produces up to a 10-bit resolution PWM output on the CCP1 pin. Since the CCP1 pin is multiplexed with the PORT data latch, the TRIS for that pin must be cleared to make the CCP1 pin an output. Note: Clearing the CCP1CON register will relinquish CCP1 control of the CCP1 pin.
TMR2 = 0
Figure 10-3 shows a simplified block diagram of PWM operation. Figure 10-4 shows a typical waveform of the PWM signal. For a step-by-step procedure on how to set up the CCP module for PWM operation, see Section 10.3.7 "Setup for PWM Operation".
FIGURE 10-3:
SIMPLIFIED PWM BLOCK DIAGRAM
CCP1CON<5:4>
Duty Cycle Registers CCPR1L
CCPR1H(2) (Slave) CCP1 Comparator
(1)
R S
Q
TMR2
TRIS Comparator Clear Timer2, toggle CCP1 pin and latch duty cycle
PR2
Note 1:
2:
The 8-bit timer TMR2 register is concatenated with the 2-bit internal system clock (FOSC), or 2 bits of the prescaler, to create the 10-bit time base. In PWM mode, CCPR1H is a read-only register.
DS41288C-page 88
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.3.1 PWM PERIOD EQUATION 10-2: PULSE WIDTH
The PWM period is specified by writing to the PR2 register of Timer2. The PWM period can be calculated using the formula of Equation 10-1. Pulse Width = ( CCPR1L:CCP1CON<5:4> ) * TOSC * (TMR2 Prescale Value)
EQUATION 10-1:
PWM PERIOD EQUATION 10-3: DUTY CYCLE RATIO
PWM Period = [ ( PR2 ) + 1 ] * 4 * TOSC * (TMR2 Prescale Value) When TMR2 is equal to PR2, the following three events occur on the next increment cycle: * TMR2 is cleared * The CCP1 pin is set. (Exception: If the PWM duty cycle = 0%, the pin will not be set.) * The PWM duty cycle is latched from CCPR1L into CCPR1H. Note: The Timer2 postscaler (see Section 7.1 "Timer2 Operation") is not used in the determination of the PWM frequency.
) Duty Cycle Ratio = ( CCPR1L:CCP1CON<5:4> ---------------------------------------------------------------------4 ( PR2 + 1 ) The CCPR1H register and a 2-bit internal latch are used to double buffer the PWM duty cycle. This double buffering is essential for glitchless PWM operation. The 8-bit timer TMR2 register is concatenated with either the 2-bit internal system clock (FOSC), or 2 bits of the prescaler, to create the 10-bit time base. The system clock is used if the Timer2 prescaler is set to 1:1. When the 10-bit time base matches the CCPR1H and 2-bit latch, then the CCP1 pin is cleared (see Figure 10-3).
10.3.2
PWM DUTY CYCLE
10.3.3
PWM RESOLUTION
The PWM duty cycle is specified by writing a 10-bit value to multiple registers: CCPR1L register and CCP1<1:0> bits of the CCP1CON register. The CCPR1L contains the eight MSbs and the CCP1<1:0> bits of the CCP1CON register contain the two LSbs. CCPR1L and CCP1<1:0> bits of the CCP1CON register can be written to at any time. The duty cycle value is not latched into CCPR1H until after the period completes (i.e., a match between PR2 and TMR2 registers occurs). While using the PWM, the CCPR1H register is read-only. Equation 10-2 is used to calculate the PWM pulse width. Equation 10-3 is used to calculate the PWM duty cycle ratio.
The resolution determines the number of available duty cycles for a given period. For example, a 10-bit resolution will result in 1024 discrete duty cycles, whereas an 8-bit resolution will result in 256 discrete duty cycles. The maximum PWM resolution is 10 bits when PR2 is 255. The resolution is a function of the PR2 register value as shown by Equation 10-4.
EQUATION 10-4:
PWM RESOLUTION
Resolution = log [ 4 ( PR2 + 1 ) ] bits ----------------------------------------log ( 2 )
Note:
If the pulse width value is greater than the period the assigned PWM pin(s) will remain unchanged.
TABLE 10-4:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (FOSC = 20 MHz)
1.22 kHz 16 0xFF 10 4.88 kHz 4 0xFF 10 19.53 kHz 1 0xFF 10 78.12 kHz 1 0x3F 8 156.3 kHz 1 0x1F 7 208.3 kHz 1 0x17 6.6
PWM Frequency Timer Prescale (1, 4, 16) PR2 Value Maximum Resolution (bits)
TABLE 10-5:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (FOSC = 8 MHz)
1.22 kHz 16 0x65 8 4.90 kHz 4 0x65 8 19.61 kHz 1 0x65 8 76.92 kHz 1 0x19 6 153.85 kHz 1 0x0C 5 200.0 kHz 1 0x09 5
PWM Frequency Timer Prescale (1, 4, 16) PR2 Value Maximum Resolution (bits)
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 89
PIC16F610/616/16HV610/616
10.3.4 OPERATION IN SLEEP MODE 10.3.7 SETUP FOR PWM OPERATION
In Sleep mode, the TMR2 register will not increment and the state of the module will not change. If the CCP1 pin is driving a value, it will continue to drive that value. When the device wakes up, TMR2 will continue from its previous state. The following steps should be taken when configuring the CCP module for PWM operation: 1. 2. 3. Configure the PWM pin (CCP1) as an input by setting the associated TRIS bit. Set the PWM period by loading the PR2 register. Configure the CCP module for the PWM mode by loading the CCP1CON register with the appropriate values. Set the PWM duty cycle by loading the CCPR1L register and CCP1 bits of the CCP1CON register. Configure and start Timer2: * Clear the TMR2IF interrupt flag bit of the PIR1 register. * Set the Timer2 prescale value by loading the T2CKPS bits of the T2CON register. * Enable Timer2 by setting the TMR2ON bit of the T2CON register. Enable PWM output after a new PWM cycle has started: * Wait until Timer2 overflows (TMR2IF bit of the PIR1 register is set). * Enable the CCP1 pin output by clearing the associated TRIS bit.
10.3.5
CHANGES IN SYSTEM CLOCK FREQUENCY
The PWM frequency is derived from the system clock frequency. Any changes in the system clock frequency will result in changes to the PWM frequency. See Section 3.0 "Oscillator Module" for additional details.
4. 5.
10.3.6
EFFECTS OF RESET
Any Reset will force all ports to Input mode and the CCP registers to their Reset states. 6.
DS41288C-page 90
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.4 PWM (Enhanced Mode)
The Enhanced PWM Mode can generate a PWM signal on up to four different output pins with up to 10-bits of resolution. It can do this through four different PWM Output modes: * * * * Single PWM Half-Bridge PWM Full-Bridge PWM, Forward mode Full-Bridge PWM, Reverse mode The PWM outputs are multiplexed with I/O pins and are designated P1A, P1B, P1C and P1D. The polarity of the PWM pins is configurable and is selected by setting the CCP1M bits in the CCP1CON register appropriately. Table 10-6 shows the pin assignments for each Enhanced PWM mode. Figure 10-5 shows an example of a simplified block diagram of the Enhanced PWM module. Note: To prevent the generation of an incomplete waveform when the PWM is first enabled, the ECCP module waits until the start of a new PWM period before generating a PWM signal.
To select an Enhanced PWM mode, the P1M bits of the CCP1CON register must be set appropriately.
FIGURE 10-5:
Duty Cycle Registers CCPR1L
EXAMPLE SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODE
CCP1<1:0> P1M<1:0> 2 CCP1M<3:0> 4
CCP1/P1A TRISC<5> CCPR1H (Slave) P1B R Q Output Controller P1C TMR2 (1) S P1D Clear Timer2, toggle PWM pin and latch duty cycle PWM1CON TRISC<2> TRISC<3> TRISC<4>
CCP1/P1A
P1B
Comparator
P1C
Comparator
P1D
PR2
Note
1:
The 8-bit timer TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler to create the 10-bit time base.
Note 1: The TRIS register value for each PWM output must be configured appropriately. 2: Clearing the CCP1CON register will relinquish ECCP control of all PWM output pins. 3: Any pin not used by an Enhanced PWM mode is available for alternate pin functions
TABLE 10-6:
ECCP Mode Single Half-Bridge
EXAMPLE PIN ASSIGNMENTS FOR VARIOUS PWM ENHANCED MODES
P1M 00 10 01 11 CCP1/P1A Yes Yes Yes Yes P1B No Yes Yes Yes P1C No No Yes Yes P1D No No Yes Yes
Full-Bridge, Forward Full-Bridge, Reverse
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 91
PIC16F610/616/16HV610/616
FIGURE 10-6: EXAMPLE PWM (ENHANCED MODE) OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE)
Signal 0 Pulse Width Period 00 (Single Output) P1A Modulated Delay(1) P1A Modulated 10 (Half-Bridge) P1B Modulated P1A Active (Full-Bridge, Forward) P1B Inactive P1C Inactive P1D Modulated P1A Inactive (Full-Bridge, Reverse) P1B Modulated P1C Active P1D Inactive Relationships: * Period = 4 * TOSC * (PR2 + 1) * (TMR2 Prescale Value) * Pulse Width = TOSC * (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value) * Delay = 4 * TOSC * (PWM1CON<6:0>) Note 1: Dead-band delay is programmed using the PWM1CON register (Section 10.4.6 "Programmable Dead-Band Delay mode"). Delay(1) PR2+1
P1M<1:0>
01
11
DS41288C-page 92
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 10-7:
P1M<1:0>
EXAMPLE ENHANCED PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW STATE)
Signal 0 Pulse Width Period PR2+1
00
(Single Output)
P1A Modulated P1A Modulated Delay(1) Delay(1)
10
(Half-Bridge)
P1B Modulated P1A Active
01
(Full-Bridge, Forward)
P1B Inactive P1C Inactive P1D Modulated P1A Inactive
11
(Full-Bridge, Reverse)
P1B Modulated P1C Active P1D Inactive
Relationships: * Period = 4 * TOSC * (PR2 + 1) * (TMR2 Prescale Value) * Pulse Width = TOSC * (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value) * Delay = 4 * TOSC * (PWM1CON<6:0>) Note 1: Dead-band delay is programmed using the PWM1CON register (Section 10.4.6 "Programmable Dead-Band Delay mode").
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 93
PIC16F610/616/16HV610/616
10.4.1 HALF-BRIDGE MODE
In Half-Bridge mode, two pins are used as outputs to drive push-pull loads. The PWM output signal is output on the CCP1/P1A pin, while the complementary PWM output signal is output on the P1B pin (see Figure 10-8). This mode can be used for half-bridge applications, as shown in Figure 10-9, or for full-bridge applications, where four power switches are being modulated with two PWM signals. In Half-Bridge mode, the programmable dead-band delay can be used to prevent shoot-through current in halfbridge power devices. The value of the PDC<6:0> bits of the PWM1CON register sets the number of instruction cycles before the output is driven active. If the value is greater than the duty cycle, the corresponding output remains inactive during the entire cycle. See 10.4.6 "Programmable Dead-Band Delay mode" for more details of the dead-band delay operations. Since the P1A and P1B outputs are multiplexed with the PORT data latches, the associated TRIS bits must be cleared to configure P1A and P1B as outputs.
FIGURE 10-8:
Period
EXAMPLE OF HALFBRIDGE PWM OUTPUT
Period
Pulse Width P1A(2) td P1B(2)
(1)
td
(1)
(1)
td = Dead-Band Delay Note 1: 2: At this time, the TMR2 register is equal to the PR2 register. Output signals are shown as active-high.
FIGURE 10-9:
EXAMPLE OF HALF-BRIDGE APPLICATIONS
Standard Half-Bridge Circuit ("Push-Pull") FET Driver P1A
+ Load
FET Driver P1B
+ -
Half-Bridge Output Driving a Full-Bridge Circuit V+
FET Driver P1A Load
FET Driver
FET Driver P1B
FET Driver
DS41288C-page 94
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.4.2 FULL-BRIDGE MODE
In Full-Bridge mode, all four pins are used as outputs. An example of full-bridge application is shown in Figure 10-10. In the Forward mode, pin CCP1/P1A is driven to its active state, pin P1D is modulated, while P1B and P1C will be driven to their inactive state as shown in Figure 10-11. In the Reverse mode, P1C is driven to its active state, pin P1B is modulated, while P1A and P1D will be driven to their inactive state as shown Figure 10-11. P1A, P1B, P1C and P1D outputs are multiplexed with the PORT data latches. The associated TRIS bits must be cleared to configure the P1A, P1B, P1C and P1D pins as outputs.
FIGURE 10-10:
EXAMPLE OF FULL-BRIDGE APPLICATION
V+
FET Driver P1A
QA
QC
FET Driver
P1B FET Driver
Load FET Driver
P1C
QB
QD
VP1D
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 95
PIC16F610/616/16HV610/616
FIGURE 10-11:
Forward Mode Period P1A(2) Pulse Width P1B(2)
EXAMPLE OF FULL-BRIDGE PWM OUTPUT
P1C(2)
P1D(2)
(1) (1)
Reverse Mode Period Pulse Width P1A(2) P1B(2) P1C(2)
P1D(2)
(1) (1)
Note 1: 2:
At this time, the TMR2 register is equal to the PR2 register. Output signal is shown as active-high.
DS41288C-page 96
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.4.2.1 Direction Change in Full-Bridge Mode
In the Full-Bridge mode, the P1M1 bit in the CCP1CON register allows users to control the forward/reverse direction. When the application firmware changes this direction control bit, the module will change to the new direction on the next PWM cycle. A direction change is initiated in software by changing the P1M1 bit of the CCP1CON register. The following sequence occurs four Timer2 cycles prior to the end of the current PWM period: * The modulated outputs (P1B and P1D) are placed in their inactive state. * The associated unmodulated outputs (P1A and P1C) are switched to drive in the opposite direction. * PWM modulation resumes at the beginning of the next period. See Figure 10-12 for an illustration of this sequence. The Full-Bridge mode does not provide dead-band delay. As one output is modulated at a time, dead-band delay is generally not required. There is a situation where dead-band delay is required. This situation occurs when both of the following conditions are true: 1. 2. The direction of the PWM output changes when the duty cycle of the output is at or near 100%. The turn off time of the power switch, including the power device and driver circuit, is greater than the turn on time.
Figure 10-13 shows an example of the PWM direction changing from forward to reverse, at a near 100% duty cycle. In this example, at time t1, the output P1A and P1D become inactive, while output P1C becomes active. Since the turn off time of the power devices is longer than the turn on time, a shoot-through current will flow through power devices QC and QD (see Figure 10-10) for the duration of `t'. The same phenomenon will occur to power devices QA and QB for PWM direction change from reverse to forward. If changing PWM direction at high duty cycle is required for an application, two possible solutions for eliminating the shoot-through current are: 1. 2. Reduce PWM duty cycle for one PWM period before changing directions. Use switch drivers that can drive the switches off faster than they can drive them on.
Other options to prevent shoot-through current may exist.
FIGURE 10-12:
Signal
EXAMPLE OF PWM DIRECTION CHANGE
Period(1) Period
P1A (Active-High) P1B (Active-High) P1C (Active-High)
(2)
Pulse Width
P1D (Active-High) Pulse Width Note 1: 2: The direction bit P1M1 of the CCP1CON register is written any time during the PWM cycle. When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle. The modulated P1B and P1D signals are inactive at this time. The length of this time is four Timer2 counts.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 97
PIC16F610/616/16HV610/616
FIGURE 10-13: EXAMPLE OF PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
Forward Period t1 Reverse Period
P1A P1B P1C
DC
P1D
PW TON
External Switch C TOFF External Switch D Potential Shoot-Through Current T = TOFF - TON
Note 1: 2: 3:
All signals are shown as active-high. TON is the turn on delay of power switch QC and its driver. TOFF is the turn off delay of power switch QD and its driver.
DS41288C-page 98
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
10.4.3 START-UP CONSIDERATIONS
When any PWM mode is used, the application hardware must use the proper external pull-up and/or pull-down resistors on the PWM output pins. Note: When the microcontroller is released from Reset, all of the I/O pins are in the highimpedance state. The external circuits must keep the power switch devices in the OFF state until the microcontroller drives the I/O pins with the proper signal levels or activates the PWM output(s).
The CCP1M<1:0> bits of the CCP1CON register allow the user to choose whether the PWM output signals are active-high or active-low for each pair of PWM output pins (P1A/P1C and P1B/P1D). The PWM output polarities must be selected before the PWM pins are configured as outputs. Changing the polarity configuration while the PWM pins are configured as outputs is not recommended since it may result in damage to the application circuits. The P1A, P1B, P1C and P1D output latches may not be in the proper states when the PWM module is initialized. Enabling the PWM pins for output at the same time as the Enhanced PWM modes may cause damage to the application circuit. The Enhanced PWM modes must be enabled in the proper Output mode and complete a full PWM cycle before configuring the PWM pins as outputs. The completion of a full PWM cycle is indicated by the TMR2IF bit of the PIR1 register being set as the second PWM period begins.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 99
PIC16F610/616/16HV610/616
10.4.4 ENHANCED PWM AUTOSHUTDOWN MODE
The PWM mode supports an Auto-Shutdown mode that will disable the PWM outputs when an external shutdown event occurs. Auto-Shutdown mode places the PWM output pins into a predetermined state. This mode is used to help prevent the PWM from damaging the application. The auto-shutdown sources are selected using the ECCPASx bits of the ECCPAS register. A shutdown event may be generated by: * * * * A logic `0' on the INT pin Comparator C1 Comparator C2 Setting the ECCPASE bit in firmware A shutdown condition is indicated by the ECCPASE (Auto-Shutdown Event Status) bit of the ECCPAS register. If the bit is a `0', the PWM pins are operating normally. If the bit is a `1', the PWM outputs are in the shutdown state. When a shutdown event occurs, two things happen: The ECCPASE bit is set to `1'. The ECCPASE will remain set until cleared in firmware or an auto-restart occurs (see Section 10.4.5 "Auto-Restart Mode"). The enabled PWM pins are asynchronously placed in their shutdown states. The PWM output pins are grouped into pairs [P1A/P1C] and [P1B/P1D]. The state of each pin pair is determined by the PSSAC and PSSBD bits of the ECCPAS register. Each pin pair may be placed into one of three states: * Drive logic `1' * Drive logic `0' * Tri-state (high-impedance)
REGISTER 10-2:
R/W-0 ECCPASE bit 7 Legend: R = Readable bit -n = Value at POR bit 7
ECCPAS: ENHANCED CAPTURE/COMPARE/PWM AUTO-SHUTDOWN CONTROL REGISTER
U-0 R/W-0 ECCPAS1 R/W-0 ECCPAS0 R/W-0 PSSAC1 R/W-0 PSSAC0 R/W-0 PSSBD1 R/W-0 PSSBD0 bit 0
ECCPAS2
W = Writable bit `1' = Bit is set
U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
ECCPASE: ECCP Auto-Shutdown Event Status bit 1 = A shutdown event has occurred; ECCP outputs are in shutdown state 0 = ECCP outputs are operating ECCPAS<2:0>: ECCP Auto-shutdown Source Select bits 000 = Auto-Shutdown is disabled 001 = Comparator C1 output high 010 = Comparator C2 output high(1) 011 = Either Comparators output is high 100 = VIL on INT pin 101 = VIL on INT pin or Comparator C1 output high 110 = VIL on INT pin or Comparator C2 output high 111 = VIL on INT pin or either Comparators output is high PSSACn: Pins P1A and P1C Shutdown State Control bits 00 = Drive pins P1A and P1C to `0' 01 = Drive pins P1A and P1C to `1' 1x = Pins P1A and P1C tri-state PSSBDn: Pins P1B and P1D Shutdown State Control bits 00 = Drive pins P1B and P1D to `0' 01 = Drive pins P1B and P1D to `1' 1x = Pins P1B and P1D tri-state
bit 6-4
bit 3-2
bit 1-0
DS41288C-page 100
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
Note 1: The auto-shutdown condition is a levelbased signal, not an edge-based signal. As long as the level is present, the autoshutdown will persist. 2: Writing to the ECCPASE bit is disabled while an auto-shutdown condition persists. 3: Once the auto-shutdown condition has been removed and the PWM restarted (either through firmware or auto-restart), the PWM signal will always restart at the beginning of the next PWM period.
FIGURE 10-14:
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PRSEN = 0)
PWM Period
Shutdown Event ECCPASE bit PWM Activity Normal PWM Start of PWM Period ECCPASE Cleared by Shutdown Shutdown Firmware PWM Event Occurs Event Clears Resumes
10.4.5
AUTO-RESTART MODE
The Enhanced PWM can be configured to automatically restart the PWM signal once the auto-shutdown condition has been removed. Auto-restart is enabled by setting the PRSEN bit in the PWM1CON register. If auto-restart is enabled, the ECCPASE bit will remain set as long as the auto-shutdown condition is active. When the auto-shutdown condition is removed, the ECCPASE bit will be cleared via hardware and normal operation will resume.
FIGURE 10-15:
PWM AUTO-SHUTDOWN WITH AUTO-RESTART ENABLED (PRSEN = 1)
PWM Period
Shutdown Event ECCPASE bit PWM Activity Normal PWM Start of PWM Period Shutdown Shutdown Event Occurs Event Clears PWM Resumes
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 101
PIC16F610/616/16HV610/616
10.4.6 PROGRAMMABLE DEAD-BAND DELAY MODE FIGURE 10-16:
Period Pulse Width P1A(2) td P1B(2)
(1)
EXAMPLE OF HALFBRIDGE PWM OUTPUT
Period
In half-bridge applications where all power switches are modulated at the PWM frequency, the power switches normally require more time to turn off than to turn on. If both the upper and lower power switches are switched at the same time (one turned on, and the other turned off), both switches may be on for a short period of time until one switch completely turns off. During this brief interval, a very high current (shoot-through current) will flow through both power switches, shorting the bridge supply. To avoid this potentially destructive shootthrough current from flowing during switching, turning on either of the power switches is normally delayed to allow the other switch to completely turn off. In Half-Bridge mode, a digitally programmable deadband delay is available to avoid shoot-through current from destroying the bridge power switches. The delay occurs at the signal transition from the non-active state to the active state. See Figure 10-16 for illustration. The lower seven bits of the associated PWM1CON register (Register 10-3) sets the delay period in terms of microcontroller instruction cycles (TCY or 4 TOSC).
td
(1)
(1)
td = Dead-Band Delay Note 1: 2: At this time, the TMR2 register is equal to the PR2 register. Output signals are shown as active-high.
FIGURE 10-17:
EXAMPLE OF HALF-BRIDGE APPLICATIONS
V+
Standard Half-Bridge Circuit ("Push-Pull") FET Driver P1A
+ V Load
FET Driver P1B
+ V -
V-
DS41288C-page 102
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 10-3:
R/W-0 PRSEN bit 7 Legend: R = Readable bit -n = Value at POR bit 7 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown
PWM1CON: ENHANCED PWM CONTROL REGISTER
R/W-0 PDC6 R/W-0 PDC5 R/W-0 PDC4 R/W-0 PDC3 R/W-0 PDC2 R/W-0 PDC1 R/W-0 PDC0 bit 0
PRSEN: PWM Restart Enable bit 1 = Upon auto-shutdown, the ECCPASE bit clears automatically once the shutdown event goes away; the PWM restarts automatically 0 = Upon auto-shutdown, ECCPASE must be cleared in software to restart the PWM PDC<6:0>: PWM Delay Count bits PDCn = Number of FOSC/4 (4 * TOSC) cycles between the scheduled time when a PWM signal should transition active and the actual time it transitions active
bit 6-0
TABLE 10-7:
Name CCP1CON(1) CCPR1L(1) CCPR1H(1) CM1CON0 CM2CON0 CM2CON1 ECCPAS(1) INTCON PIE1 PIR1 PWM1CON T2CON(1) TMR2(1) TRISA TRISC
(1)
SUMMARY OF REGISTERS ASSOCIATED WITH PWM
Bit 7 P1M1 Bit 6 P1M0 Bit 5 DC1B1 Bit 4 DC1B0 Bit 3 CCP1M3 Bit 2 CCP1M2 Bit 1 CCP1M1 Bit 0 CCP1M0 Value on POR, BOR 0000 0000 xxxx xxxx xxxx xxxx -- -- C1HYS PSSAC1 RAIE C1IE C1IF PDC3 TOUTPS0 C1R C2R C2HYS PSSAC0 T0IF -- -- PDC2 TMR2ON C1CH1 C2CH1 T1GSS PSSBD1 INTF TMR2IE(1) TMR2IF(1) PDC1 T2CKPS1 C1CH0 C2CH0 C2SYNC PSSBD0 RAIF TMR1IE TMR1IF PDC0 T2CKPS0 0000 -000 0000 -000 00-0 0010 0000 0000 0000 0000 -000 0-00 -000 0-00 0000 0000 -000 0000 0000 0000 TRISA5 TRISC5 TRISA4 TRISC4 TRISA3 TRISC3 TRISA2 TRISC2 TRISA1 TRISC1 TRISA0 TRISC0 --11 1111 --11 1111 Value on all other Resets 0000 0000 uuuu uuuu uuuu uuuu 0000 -000 0000 -000 00-0 0010 0000 0000 0000 0000 0000 0-00 0000 0-00 0000 0000 -000 0000 0000 0000 --11 1111 --11 1111
Capture/Compare/PWM Register 1 Low Byte Capture/Compare/PWM Register 1 High Byte C1ON C2ON MC1OUT ECCPASE GIE -- -- PRSEN -- C1OUT C2OUT MC2OUT ECCPAS2 PEIE ADIE(1) ADIF(1) PDC6 TOUTPS3 C1OE C2OE -- ECCPAS1 T0IE CCP1IE(1) CCP1IF(1) PDC5 TOUTPS2 C1POL C2POL T1ACS ECCPAS0 INTE C2IE C2IF PDC4 TOUTPS1
Timer2 Module Register -- -- -- --
Legend: - = Unimplemented locations, read as `0', u = unchanged, x = unknown. Shaded cells are not used by the Capture, Compare and PWM. Note 1: PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 103
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 104
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
11.0 VOLTAGE REGULATOR
The PIC16HV616 includes a permanent internal 5 volt (nominal) shunt regulator in parallel with the VDD pin. This eliminates the need for an external voltage regulator in systems sourced by an unregulated supply. All external devices connected directly to the VDD pin will share the regulated supply voltage and contribute to the total VDD supply current (ILOAD). An external current limiting resistor, RSER, located between the unregulated supply, VUNREG, and the VDD pin, drops the difference in voltage between VUNREG and VDD. RSER must be between RMAX and RMIN as defined by Equation 11-1.
EQUATION 11-1:
RMAX =
RSER LIMITING RESISTOR
(VUMIN - 5V) 1.05 * (4 MA + ILOAD)
11.1
Regulator Operation
RMIN =
A shunt regulator generates a specific supply voltage by creating a voltage drop across a pass resistor RSER. The voltage at the VDD pin of the microcontroller is monitored and compared to an internal voltage reference. The current through the resistor is then adjusted, based on the result of the comparison, to produce a voltage drop equal to the difference between the supply voltage VUNREG and the VDD of the microcontroller. See Figure 11-1 for voltage regulator schematic.
(VUMAX - 5V) 0.95 * (50 MA)
Where: RMAX = maximum value of RSER (ohms) RMIN = minimum value of RSER (ohms) VUMIN = minimum value of VUNREG VUMAX = maximum value of VUNREG VDD = regulated voltage (5V nominal) ILOAD = maximum expected load current in mA including I/O pin currents and external circuits connected to VDD.
FIGURE 11-1:
VUNREG RSER
VOLTAGE REGULATOR
ILOAD VDD
ISUPPLY
1.05 0.95
= compensation for +5% tolerance of RSER = compensation for -5% tolerance of RSER
CBYPASS
ISHUNT
Feedback VSS
11.2
Regulator Considerations
The supply voltage VUNREG and load current are not constant. Therefore, the current range of the regulator is limited. Selecting a value for RSER must take these three factors into consideration. Since the regulator uses the band gap voltage as the regulated voltage reference, this voltage reference is permanently enabled in the PIC16F610/16HV610 devices.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 105
PIC16F610/616/16HV610/616
12.0 SPECIAL FEATURES OF THE CPU
12.1 Configuration Bits
The Configuration bits can be programmed (read as `0'), or left unprogrammed (read as `1') to select various device configurations as shown in Register 12-1. These bits are mapped in program memory location 2007h. Note: Address 2007h is beyond the user program memory space. It belongs to the special configuration memory space (2000h3FFFh), which can be accessed only during programming. See "PIC12F60X/12F61X/ 16F61X Memory Programming Specification" (DS41284) for more information.
The PIC16F610/616/16HV610/616 has a host of features intended to maximize system reliability, minimize cost through elimination of external components, provide power saving features and offer code protection. These features are: * Reset - Power-on Reset (POR) - Power-up Timer (PWRT) - Oscillator Start-up Timer (OST) - Brown-out Reset (BOR) * Interrupts * Watchdog Timer (WDT) * Oscillator selection * Sleep * Code protection * ID Locations * In-Circuit Serial Programming The PIC16F610/616/16HV610/616 has two timers that offer necessary delays on power-up. One is the Oscillator Start-up Timer (OST), intended to keep the chip in Reset until the crystal oscillator is stable. The other is the Power-up Timer (PWRT), which provides a fixed delay of 64 ms (nominal) on power-up only, designed to keep the part in Reset while the power supply stabilizes. There is also circuitry to reset the device if a brown-out occurs, which can use the Powerup Timer to provide at least a 64 ms Reset. With these three functions-on-chip, most applications need no external Reset circuitry. The Sleep mode is designed to offer a very low-current Power-Down mode. The user can wake-up from Sleep through: * External Reset * Watchdog Timer Wake-up * An interrupt Several oscillator options are also made available to allow the part to fit the application. The INTOSC option saves system cost while the LP crystal option saves power. A set of Configuration bits are used to select various options (see Register 12-1).
DS41288C-page 106
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
REGISTER 12-1:
-- bit 15
CONFIG: CONFIGURATION WORD REGISTER
-- BOREN1(1) BOREN0(1) bit 8
--
--
--
--
IOSCFS bit 7 Legend: R = Readable bit -n = Value at POR bit 15-10 bit 9-8
CP(2)
MCLRE(3)
PWRTE
WDTE
FOSC2
FOSC1
FOSC0 bit 0
W = Writable bit `1' = Bit is set
P = Programmable' `0' = Bit is cleared
U = Unimplemented bit, read as `0' x = Bit is unknown
Unimplemented: Read as `1' BOREN<1:0>: Brown-out Reset Selection bits(1) 11 = BOR enabled 10 = BOR enabled during operation and disabled in Sleep 0x = BOR disabled IOSCFS: Internal Oscillator Frequency Select bit 1 = 8 MHz 0 = 4 MHz CP: Code Protection bit(2) 1 = Program memory code protection is disabled 0 = Program memory code protection is enabled MCLRE: MCLR Pin Function Select bit(3) 1 = MCLR pin function is MCLR 0 = MCLR pin function is digital input, MCLR internally tied to VDD PWRTE: Power-up Timer Enable bit 1 = PWRT disabled 0 = PWRT enabled WDTE: Watchdog Timer Enable bit 1 = WDT enabled 0 = WDT disabled FOSC<2:0>: Oscillator Selection bits 111 = RC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN 110 = RCIO oscillator: I/O function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN 101 = INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN 100 = INTOSCIO oscillator: I/O function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN 011 = EC: I/O function on RA4/OSC2/CLKOUT pin, CLKIN on RA5/OSC1/CLKIN 010 = HS oscillator: High-speed crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN 001 = XT oscillator: Crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN 000 = LP oscillator: Low-power crystal on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN Enabling Brown-out Reset does not automatically enable Power-up Timer. The entire program memory will be erased when the code protection is turned off. When MCLR is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
Note 1: 2: 3:
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 107
PIC16F610/616/16HV610/616
12.2 Calibration Bits
The 8 MHz internal oscillator is factory calibrated. These calibration values are stored in fuses located in the Calibration Word (2009h). The Calibration Word is not erased when using the specified bulk erase sequence in the "PIC12F60X/12F61X/16F61X Memory Programming Specification" (DS41284) and thus, does not require reprogramming. Some registers are not affected in any Reset condition; their status is unknown on POR and unchanged in any other Reset. Most other registers are reset to a "Reset state" on: * * * * * Power-on Reset MCLR Reset MCLR Reset during Sleep WDT Reset Brown-out Reset (BOR)
12.3
Reset
differentiates
The PIC16F610/616/16HV610/616 between various kinds of Reset: a) b) c) d) e) f)
Power-on Reset (POR) WDT Reset during normal operation WDT Reset during Sleep MCLR Reset during normal operation MCLR Reset during Sleep Brown-out Reset (BOR)
WDT wake-up does not cause register resets in the same manner as a WDT Reset since wake-up is viewed as the resumption of normal operation. TO and PD bits are set or cleared differently in different Reset situations, as indicated in Table 12-2. Software can use these bits to determine the nature of the Reset. See Table 12-4 for a full description of Reset states of all registers. A simplified block diagram of the On-Chip Reset Circuit is shown in Figure 12-1. The MCLR Reset path has a noise filter to detect and ignore small pulses. See Section 15.0 "Electrical Specifications" for pulse-width specifications.
FIGURE 12-1:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
External Reset
MCLR/VPP pin Sleep WDT Module POR Detect VDD Brown-out(1) Reset BOREN WDT Time-out Reset Power-on Reset
S
OST/PWRT OST 10-bit Ripple Counter OSC1/ CLKI pin PWRT On-Chip RC OSC 11-bit Ripple Counter R Q Chip_Reset
Enable PWRT Enable OST
Note
1:
Refer to the Configuration Word register (Register 12-1).
DS41288C-page 108
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.3.1 POWER-ON RESET (POR) FIGURE 12-2:
VDD
The on-chip POR circuit holds the chip in Reset until VDD has reached a high enough level for proper operation. To take advantage of the POR, simply connect the MCLR pin through a resistor to VDD. This will eliminate external RC components usually needed to create Power-on Reset. A maximum rise time for VDD is required. See Section 15.0 "Electrical Specifications" for details. If the BOR is enabled, the maximum rise time specification does not apply. The BOR circuitry will keep the device in Reset until VDD reaches VBOR (see Section 12.3.4 "Brown-out Reset (BOR)"). Note: The POR circuit does not produce an internal Reset when VDD declines. To reenable the POR, VDD must reach Vss for a minimum of 100 s.
RECOMMENDED MCLR CIRCUIT
PIC(R) MCU
R1 1 k (or greater) R2 MCLR SW1 (optional) 100 (needed with capacitor) C1 0.1 F (optional, not critical)
When the device starts normal operation (exits the Reset condition), device operating parameters (i.e., voltage, frequency, temperature, etc.) must be met to ensure proper operation. If these conditions are not met, the device must be held in Reset until the operating conditions are met. For additional information, refer to Application Note AN607, "Power-up Trouble Shooting" (DS00607).
12.3.3
POWER-UP TIMER (PWRT)
12.3.2
MCLR
PIC16F610/616/16HV610/616 has a noise filter in the MCLR Reset path. The filter will detect and ignore small pulses. It should be noted that a WDT Reset does not drive MCLR pin low. Voltages applied to the MCLR pin that exceed its specification can result in both MCLR Resets and excessive current beyond the device specification during the ESD event. For this reason, Microchip recommends that the MCLR pin no longer be tied directly to VDD. The use of an RC network, as shown in Figure 12-2, is suggested. An internal MCLR option is enabled by clearing the MCLRE bit in the Configuration Word register. When MCLRE = 0, the Reset signal to the chip is generated internally. When the MCLRE = 1, the RA3/MCLR pin becomes an external Reset input. In this mode, the RA3/MCLR pin has a weak pull-up to VDD.
The Power-up Timer provides a fixed 64 ms (nominal) time-out on power-up only, from POR or Brown-out Reset. The Power-up Timer operates from an internal RC oscillator. For more information, see Section 3.4 "Internal Clock Modes". The chip is kept in Reset as long as PWRT is active. The PWRT delay allows the VDD to rise to an acceptable level. A Configuration bit, PWRTE, can disable (if set) or enable (if cleared or programmed) the Power-up Timer. The Power-up Timer should be enabled when Brown-out Reset is enabled, although it is not required. The Power-up Timer delay will vary from chip-to-chip due to: * VDD variation * Temperature variation * Process variation See DC parameters for details "Electrical Specifications"). (Section 15.0
Note:
Voltage spikes below VSS at the MCLR pin, inducing currents greater than 80 mA, may cause latch-up. Thus, a series resistor of 50-100 should be used when applying a "low" level to the MCLR pin, rather than pulling this pin directly to VSS.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 109
PIC16F610/616/16HV610/616
12.3.4 BROWN-OUT RESET (BOR)
The BOREN0 and BOREN1 bits in the Configuration Word register select one of three BOR modes. Selecting BOREN<1:0> = 10, the BOR is automatically disabled in Sleep to conserve power and enabled on wake-up. See Register 12-1 for the Configuration Word definition. A brown-out occurs when VDD falls below VBOR for greater than parameter TBOR (see Section 15.0 "Electrical Specifications"). The brown-out condition will reset the device. This will occur regardless of VDD slew rate. A Brown-out Reset may not occur if VDD falls below VBOR for less than parameter TBOR. On any Reset (Power-on, Brown-out Reset, Watchdog timer, etc.), the chip will remain in Reset until VDD rises above VBOR (see Figure 12-3). If enabled, the Powerup Timer will be invoked by the Reset and keep the chip in Reset an additional 64 ms. Note: The Power-up Timer is enabled by the PWRTE bit in the Configuration Word register.
If VDD drops below VBOR while the Power-up Timer is running, the chip will go back into a Brown-out Reset and the Power-up Timer will be re-initialized. Once VDD rises above VBOR, the Power-up Timer will execute a 64 ms Reset.
FIGURE 12-3:
VDD
BROWN-OUT SITUATIONS
VBOR
Internal Reset VDD
64 ms(1)
VBOR < 64 ms
Internal Reset
64 ms(1)
VDD
VBOR
Internal Reset Note 1: 64 ms delay only if PWRTE bit is programmed to `0'.
64 ms(1)
DS41288C-page 110
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.3.5 TIME-OUT SEQUENCE 12.3.6
On power-up, the time-out sequence is as follows: * PWRT time-out is invoked after POR has expired. * OST is activated after the PWRT time-out has expired. The total time-out will vary based on oscillator configuration and PWRTE bit status. For example, in EC mode with PWRTE bit erased (PWRT disabled), there will be no time-out at all. Figure 12-4, Figure 12-5 and Figure 12-6 depict time-out sequences. Since the time-outs occur from the POR pulse, if MCLR is kept low long enough, the time-outs will expire. Then, bringing MCLR high will begin execution immediately (see Figure 12-5). This is useful for testing purposes or to synchronize more than one PIC16F610/616/ 16HV610/616 device operating in parallel. Table 12-5 shows the Reset conditions for some special registers, while Table 12-4 shows the Reset conditions for all the registers.
POWER CONTROL (PCON) REGISTER
The Power Control register PCON (address 8Eh) has two Status bits to indicate what type of Reset occurred last. Bit 0 is BOR (Brown-out). BOR is unknown on Poweron Reset. It must then be set by the user and checked on subsequent Resets to see if BOR = 0, indicating that a Brown-out has occurred. The BOR Status bit is a "don't care" and is not necessarily predictable if the brown-out circuit is disabled (BOREN<1:0> = 00 in the Configuration Word register). Bit 1 is POR (Power-on Reset). It is a `0' on Power-on Reset and unaffected otherwise. The user must write a `1' to this bit following a Power-on Reset. On a subsequent Reset, if POR is `0', it will indicate that a Poweron Reset has occurred (i.e., VDD may have gone too low). For more information, see Section 12.3.4 "Brown-out Reset (BOR)".
TABLE 12-1:
TIME-OUT IN VARIOUS SITUATIONS
Power-up Brown-out Reset PWRTE = 0 TPWRT + 1024 * TOSC TPWRT PWRTE = 1 1024 * TOSC -- Wake-up from Sleep 1024 * TOSC --
Oscillator Configuration PWRTE = 0 XT, HS, LP RC, EC, INTOSC TPWRT + 1024 * TOSC TPWRT PWRTE = 1 1024 * TOSC --
TABLE 12-2:
POR 0 u u u u u x 0 u u u u
STATUS/PCON BITS AND THEIR SIGNIFICANCE
TO 1 1 0 0 u 1 PD 1 1 u 0 u 0 Power-on Reset Brown-out Reset WDT Reset WDT Wake-up MCLR Reset during normal operation MCLR Reset during Sleep Condition
BOR
Legend: u = unchanged, x = unknown
TABLE 12-3:
Name PCON STATUS Bit 7 -- IRP
SUMMARY OF REGISTERS ASSOCIATED WITH BROWN-OUT RESET
Bit 6 -- RP1 Bit 5 -- RP0 Bit 4 -- TO Bit 3 -- PD Bit 2 -- Z Bit 1 POR DC Bit 0 BOR C Value on POR, BOR Value on all other Resets(1)
---- --qq ---- --uu 0001 1xxx 000q quuu
Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as `0', q = value depends on condition. Shaded cells are not used by BOR. Note 1: Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 111
PIC16F610/616/16HV610/616
FIGURE 12-4: TIME-OUT SEQUENCE ON POWER-UP (DELAYED MCLR): CASE 1
VDD MCLR Internal POR TPWRT PWRT Time-out
TOST
OST Time-out
Internal Reset
FIGURE 12-5:
TIME-OUT SEQUENCE ON POWER-UP (DELAYED MCLR): CASE 2
VDD MCLR Internal POR TPWRT PWRT Time-out
TOST
OST Time-out
Internal Reset
FIGURE 12-6:
VDD MCLR Internal POR
TIME-OUT SEQUENCE ON POWER-UP (MCLR WITH VDD)
TPWRT PWRT Time-out
TOST
OST Time-out
Internal Reset
DS41288C-page 112
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 12-4: INITIALIZATION CONDITION FOR REGISTERS
Power-on Reset xxxx xxxx xxxx xxxx xxxx xxxx 0000 0000 0001 1xxx xxxx xxxx --x0 x000 --xx xx00 ---0 0000 0000 0000 -000 0-00 xxxx xxxx xxxx xxxx 0000 0000 0000 0000 -000 0000 xxxx xxxx xxxx xxxx 0000 0000 0000 0000 0000 0000 0000 0000 0000 -000 0000 -000 00-0 0000 xxxx xxxx 0000 0000 1111 1111 --11 1111 --11 1111 -000 0-00 ---- --0x ---0 0000 MCLR Reset WDT Reset Brown-out Reset(1) uuuu uuuu xxxx xxxx uuuu uuuu 0000 0000 000q quuu uuuu uuuu --u0 u000 --uu 00uu ---0 0000 0000 0000 -000 0-00 uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 -000 0000 uuuu uuuu uuuu uuuu 0000 0000 0000 0000 0000 0000 0000 0000 0000 -000 0000 -000 00-0 0000 uuuu uuuu 0000 0000 1111 1111 --11 1111 --11 1111 -000 0-00 ---- --uu
(1, 5) (4)
Register
Address
Wake-up from Sleep through Interrupt Wake-up from Sleep through WDT Time-out uuuu uuuu uuuu uuuu uuuu uuuu PC + 1(3) uuuq quuu(4) uuuu uuuu --uu uuuu --uu uuuu ---u uuuu uuuu uuuu(2) -uuu u-uu(2) uuuu uuuu uuuu uuuu -uuu uuuu uuuu uuuu -uuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu -uuu uu-u uuuu uuuu uuuu uuuu uuuu uuuu uuuu --uu uuuu --uu uuuu -uuu u-uu ---- --uu ---u uuuu
W INDF TMR0 PCL STATUS FSR PORTA PORTC PCLATH INTCON PIR1 TMR1L TMR1H T1CON TMR2(6) T2CON(6) CCPR1L(6) CCPR1H(6) CCP1CON(6) PWM1CON ECCPAS(6) VRCON CM1CON0 CM2CON0 CM2CON1 ADRESH
(6) (6)
-- 00h/80h 01h 02h/82h 03h/83h 04h/84h 05h 07h 0Ah/8Ah 0Bh/8Bh 0Ch 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 19h 1Ah 1Bh 1Ch 1Eh 1Fh 81h 85h 87h 8Ch 8Eh 90h
ADCON0(6) OPTION_REG TRISA TRISC PIE1 PCON OSCTUNE Legend: Note 1: 2: 3: 4: 5: 6:
---u uuuu
u = unchanged, x = unknown, - = unimplemented bit, reads as `0', q = value depends on condition. If VDD goes too low, Power-on Reset will be activated and registers will be affected differently. One or more bits in INTCON and/or PIR1 will be affected (to cause wake-up). When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h). See Table 12-5 for Reset value for specific condition. If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 113
PIC16F610/616/16HV610/616
TABLE 12-4: INITIALIZATION CONDITION FOR REGISTERS (CONTINUED)
Power-on Reset 1111 1111 1111 1111 --11 -111 --00 0000 0000 00-0 00-- ---xxxx xxxx -000 ---MCLR Reset WDT Reset (Continued) Brown-out Reset(1) 1111 1111 1111 1111 --11 -111 --00 0000 0000 00-0 00-- ---uuuu uuuu -000 ---Wake-up from Sleep through Interrupt Wake-up from Sleep through WDT Time-out (Continued) uuuu uuuu 1111 1111 --uu -uuu --uu uuuu uuuu uu-u uu-- ---uuuu uuuu -uuu ----
Register
Address
ANSEL PR2(6) WPUA IOCA SRCON0 SRCON1 ADRESL Legend: Note 1: 2: 3: 4: 5: 6:
(6)
91h 92h 95h 96h 99h 9Ah 9Eh 9Fh
ADCON1(6)
u = unchanged, x = unknown, - = unimplemented bit, reads as `0', q = value depends on condition. If VDD goes too low, Power-on Reset will be activated and registers will be affected differently. One or more bits in INTCON and/or PIR1 will be affected (to cause wake-up). When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h). See Table 12-5 for Reset value for specific condition. If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u. PIC16F616/16HV616 only.
TABLE 12-5:
INITIALIZATION CONDITION FOR SPECIAL REGISTERS
Condition Program Counter 000h 000h 000h 000h PC + 1 000h PC + 1(1) Status Register 0001 1xxx 000u uuuu 0001 0uuu 0000 uuuu uuu0 0uuu 0001 1uuu uuu1 0uuu PCON Register ---- --0x ---- --uu ---- --uu ---- --uu ---- --uu ---- --10 ---- --uu
Power-on Reset MCLR Reset during normal operation MCLR Reset during Sleep WDT Reset WDT Wake-up Brown-out Reset Interrupt Wake-up from Sleep
Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as `0'. Note 1: When the wake-up is due to an interrupt and Global Interrupt Enable bit, GIE, is set, the PC is loaded with the interrupt vector (0004h) after execution of PC + 1.
DS41288C-page 114
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.4 Interrupts
has multiple The PIC16F610/616/16HV610/616 sources of interrupt: * * * * * * * * For external interrupt events, such as the INT pin or PORTA change interrupt, the interrupt latency will be three or four instruction cycles. The exact latency depends upon when the interrupt event occurs (see Figure 12-8). The latency is the same for one or twocycle instructions. Once in the Interrupt Service Routine, the source(s) of the interrupt can be determined by polling the interrupt flag bits. The interrupt flag bit(s) must be cleared in software before re-enabling interrupts to avoid multiple interrupt requests. Note 1: Individual interrupt flag bits are set, regardless of the status of their corresponding mask bit or the GIE bit. 2: When an instruction that clears the GIE bit is executed, any interrupts that were pending for execution in the next cycle are ignored. The interrupts, which were ignored, are still pending to be serviced when the GIE bit is set again. For additional information on Timer1, Timer2, comparators, ADC, Enhanced CCP modules, refer to the respective peripheral section.
External Interrupt RA2/INT Timer0 Overflow Interrupt PORTA Change Interrupts 2 Comparator Interrupts A/D Interrupt (PIC16F616/16HV616 only) Timer1 Overflow Interrupt Timer2 Match Interrupt (PIC16F616/16HV616 only) Enhanced CCP Interrupt (PIC16F616/16HV616 only)
The Interrupt Control register (INTCON) and Peripheral Interrupt Request Register 1 (PIR1) record individual interrupt requests in flag bits. The INTCON register also has individual and global interrupt enable bits. The Global Interrupt Enable bit, GIE of the INTCON register, enables (if set) all unmasked interrupts, or disables (if cleared) all interrupts. Individual interrupts can be disabled through their corresponding enable bits in the INTCON register and PIE1 register. GIE is cleared on Reset. When an interrupt is serviced, the following actions occur automatically: * The GIE is cleared to disable any further interrupt. * The return address is pushed onto the stack. * The PC is loaded with 0004h. The Return from Interrupt instruction, RETFIE, exits the interrupt routine, as well as sets the GIE bit, which re-enables unmasked interrupts. The following interrupt flags are contained in the INTCON register: * INT Pin Interrupt * PORTA Change Interrupt * Timer0 Overflow Interrupt The peripheral interrupt flags are contained in the special register, PIR1. The corresponding interrupt enable bit is contained in special register, PIE1. The following interrupt flags are contained in the PIR1 register: * * * * * A/D Interrupt 2 Comparator Interrupts Timer1 Overflow Interrupt Timer2 Match Interrupt Enhanced CCP Interrupt
12.4.1
RA2/INT INTERRUPT
The external interrupt on the RA2/INT pin is edgetriggered; either on the rising edge if the INTEDG bit of the OPTION register is set, or the falling edge, if the INTEDG bit is clear. When a valid edge appears on the RA2/INT pin, the INTF bit of the INTCON register is set. This interrupt can be disabled by clearing the INTE control bit of the INTCON register. The INTF bit must be cleared by software in the Interrupt Service Routine before re-enabling this interrupt. The RA2/INT interrupt can wake-up the processor from Sleep, if the INTE bit was set prior to going into Sleep. See Section 12.7 "Power-Down Mode (Sleep)" for details on Sleep and Figure 12-9 for timing of wake-up from Sleep through RA2/INT interrupt. Note: The ANSEL register must be initialized to configure an analog channel as a digital input. Pins configured as analog inputs will read `0' and cannot generate an interrupt.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 115
PIC16F610/616/16HV610/616
12.4.2 TIMER0 INTERRUPT 12.4.3 PORTA INTERRUPT-ON-CHANGE
An overflow (FFh 00h) in the TMR0 register will set the T0IF bit of the INTCON register. The interrupt can be enabled/disabled by setting/clearing T0IE bit of the INTCON register. See Section 5.0 "Timer0 Module" for operation of the Timer0 module. An input change on PORTA sets the RAIF bit of the INTCON register. The interrupt can be enabled/ disabled by setting/clearing the RAIE bit of the INTCON register. Plus, individual pins can be configured through the IOCA register. Note: If a change on the I/O pin should occur when any PORTA operation is being executed, then the RAIF interrupt flag may not get set.
FIGURE 12-7:
INTERRUPT LOGIC
IOC-RA0 IOCA0 IOC-RA1 IOCA1 IOC-RA2 IOCA2 IOC-RA3 IOCA3 IOC-RA4 IOCA4 IOC-RA5 IOCA5 TMR2IF(2) TMR2IE(2) TMR1IF TMR1IE C1IF C1IE C2IF C2IE ADIF(2) ADIE(2) CCP1IF(2) CCP1IE(2) Note 1: Some peripherals depend upon the system clock for operation. Since the system clock is suspended during Sleep, only those peripherals which do not depend upon the system clock will wake the part from Sleep. See Section 12.7.1 "Wake-up from Sleep". PIC16F616/16HV616 only. T0IF T0IE INTF INTE RAIF RAIE PEIE GIE Wake-up (If in Sleep mode)(1)
Interrupt to CPU
2:
DS41288C-page 116
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 12-8: INT PIN INTERRUPT TIMING
Q1 Q2 OSC1 CLKOUT (3)
(4)
Q3
Q4 Q1 Q2
Q3 Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3 Q4
Q1
Q2
Q3
Q4
INT pin INTF flag (INTCON reg.) GIE bit (INTCON reg.) INSTRUCTION FLOW PC Instruction Fetched Instruction Executed
Note 1: 2: 3: 4: 5:
(1) (5)
(1)
Interrupt Latency (2)
PC
PC + 1 Inst (PC + 1) Inst (PC)
PC + 1 -- Dummy Cycle
0004h Inst (0004h) Dummy Cycle
0005h Inst (0005h) Inst (0004h)
Inst (PC) Inst (PC - 1)
INTF flag is sampled here (every Q1). Asynchronous interrupt latency = 3-4 TCY. Synchronous latency = 3 TCY, where TCY = instruction cycle time. Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction. CLKOUT is available only in INTOSC and RC Oscillator modes. For minimum width of INT pulse, refer to AC specifications in Section 15.0 "Electrical Specifications". INTF is enabled to be set any time during the Q4-Q1 cycles.
TABLE 12-6:
Name INTCON IOCA PIR1 PIE1 Legend: Note 1:
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS
Bit 6 PEIE -- ADIF(1) ADIE(1) Bit 5 T0IE IOCA5 CCP1IF(1) CCP1IE(1) Bit 4 INTE IOCA4 C2IF C2IE Bit 3 RAIE IOCA3 C1IF C1IE Bit 2 T0IF IOCA2 -- -- Bit 1 INTF IOCA1 TMR2IF(1) TMR2IE(1) Bit 0 RAIF IOCA0 TMR1IF TMR1IE Value on POR, BOR 0000 0000 --00 0000 -000 0-00 -000 0-00 Value on all other Resets 0000 0000 --00 0000 -000 0-00 -000 0-00
Bit 7 GIE -- -- --
x = unknown, u = unchanged, - = unimplemented read as `0', q = value depends upon condition. Shaded cells are not used by the interrupt module. PIC16F616/16HV616 only.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 117
PIC16F610/616/16HV610/616
12.5 Context Saving During Interrupts
During an interrupt, only the return PC value is saved on the stack. Typically, users may wish to save key registers during an interrupt (e.g., W and STATUS registers). This must be implemented in software. Temporary holding registers W_TEMP and STATUS_TEMP should be placed in the last 16 bytes of GPR (see Figure 2-4). These 16 locations are common to all banks and do not require banking. This makes context save and restore operations simpler. The code shown in Example 12-1 can be used to: * * * * * Store the W register Store the STATUS register Execute the ISR code Restore the Status (and Bank Select Bit register) Restore the W register Note: The PIC16F610/616/16HV610/616 does not require saving the PCLATH. However, if computed GOTO's are used in both the ISR and the main code, the PCLATH must be saved and restored in the ISR.
EXAMPLE 12-1:
MOVWF SWAPF
SAVING STATUS AND W REGISTERS IN RAM
;Copy W to TEMP ;Swap status to ;Swaps are used ;Save status to register be saved into W because they do not affect the status bits bank zero STATUS_TEMP register
W_TEMP STATUS,W
MOVWF STATUS_TEMP : :(ISR) : SWAPF STATUS_TEMP,W MOVWF SWAPF SWAPF STATUS W_TEMP,F W_TEMP,W
;Insert user code here ;Swap STATUS_TEMP register into W ;(sets bank to original state) ;Move W into STATUS register ;Swap W_TEMP ;Swap W_TEMP into W
DS41288C-page 118
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.6 Watchdog Timer (WDT)
12.6.1 WDT PERIOD
The Watchdog Timer is a free running, on-chip RC oscillator, which requires no external components. This RC oscillator is separate from the external RC oscillator of the CLKIN pin and INTOSC. That means that the WDT will run, even if the clock on the OSC1 and OSC2 pins of the device has been stopped (for example, by execution of a SLEEP instruction). During normal operation, a WDT time out generates a device Reset. If the device is in Sleep mode, a WDT time out causes the device to wake-up and continue with normal operation. The WDT can be permanently disabled by programming the Configuration bit, WDTE, as clear (Section 12.1 "Configuration Bits"). The WDT has a nominal time-out period of 18 ms (with no prescaler). The time-out periods vary with temperature, VDD and process variations from part to part (see Table 15-4, Parameter 31). If longer time-out periods are desired, a prescaler with a division ratio of up to 1:128 can be assigned to the WDT under software control by writing to the OPTION register. Thus, time-out periods up to 2.3 seconds can be realized. The CLRWDT and SLEEP instructions clear the WDT and the prescaler, if assigned to the WDT, and prevent it from timing out and generating a device Reset. The TO bit in the STATUS register will be cleared upon a Watchdog Timer time out.
12.6.2
WDT PROGRAMMING CONSIDERATIONS
It should also be taken in account that under worstcase conditions (i.e., VDD = Min., Temperature = Max., Max. WDT prescaler) it may take several seconds before a WDT time out occurs.
FIGURE 12-2:
CLKOUT (= FOSC/4)
WATCHDOG TIMER BLOCK DIAGRAM
Data Bus 0 1 1 SYNC 2 Cycles 0 0 TMR0 8
T0CKI pin T0SE T0CS
8-bit Prescaler 1 8 3 PS<2:0>
Set Flag bit T0IF on Overflow PSA
PSA
1 WDT Time-Out 0
Watchdog Timer
WDTE Note 1: T0SE, T0CS, PSA, PS<2:0> are bits in the OPTION register.
PSA
TABLE 12-7:
WDTE = 0 CLRWDT Command
WDT STATUS
Conditions WDT
Cleared Cleared until the end of OST
Exit Sleep + System Clock = EXTRC, INTRC, EC Exit Sleep + System Clock = XT, HS, LP
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 119
PIC16F610/616/16HV610/616
TABLE 12-8:
Name OPTION_REG CONFIG(1) Legend: Note 1:
SUMMARY OF REGISTERS ASSOCIATED WITH WATCHDOG TIMER
Bit 7 RAPU IOSCFS Bit 6 INTEDG CP Bit 5 T0CS MCLRE Bit 4 T0SE PWRTE Bit 3 PSA WDTE Bit 2 PS2 FOSC2 Bit 1 PS1 FOSC1 Bit 0 PS0 FOSC0 Value on POR, BOR 1111 1111 -- Value on all other Resets 1111 1111 --
Shaded cells are not used by the Watchdog Timer. See Register 12-1 for operation of all Configuration Word register bits.
DS41288C-page 120
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.7 Power-Down Mode (Sleep)
The Power-Down mode is entered by executing a SLEEP instruction. If the Watchdog Timer is enabled: * * * * * WDT will be cleared but keeps running. PD bit in the STATUS register is cleared. TO bit is set. Oscillator driver is turned off. I/O ports maintain the status they had before SLEEP was executed (driving high, low or high-impedance). When the SLEEP instruction is being executed, the next instruction (PC + 1) is prefetched. For the device to wake-up through an interrupt event, the corresponding interrupt enable bit must be set (enabled). Wake-up is regardless of the state of the GIE bit. If the GIE bit is clear (disabled), the device continues execution at the instruction after the SLEEP instruction. If the GIE bit is set (enabled), the device executes the instruction after the SLEEP instruction, then branches to the interrupt address (0004h). In cases where the execution of the instruction following SLEEP is not desirable, the user should have a NOP after the SLEEP instruction. Note: If the global interrupts are disabled (GIE is cleared) and any interrupt source has both its interrupt enable bit and the corresponding interrupt flag bits set, the device will immediately wake-up from Sleep.
For lowest current consumption in this mode, all I/O pins should be either at VDD or VSS, with no external circuitry drawing current from the I/O pin and the comparators and CVREF should be disabled. I/O pins that are highimpedance inputs should be pulled high or low externally to avoid switching currents caused by floating inputs. The T0CKI input should also be at VDD or VSS for lowest current consumption. The contribution from on-chip pullups on PORTA should be considered. The MCLR pin must be at a logic high level. Note: It should be noted that a Reset generated by a WDT time-out does not drive MCLR pin low.
The WDT is cleared when the device wakes up from Sleep, regardless of the source of wake-up.
12.7.2
WAKE-UP USING INTERRUPTS
When global interrupts are disabled (GIE cleared) and any interrupt source has both its interrupt enable bit and interrupt flag bit set, one of the following will occur: * If the interrupt occurs before the execution of a SLEEP instruction, the SLEEP instruction will complete as a NOP. Therefore, the WDT and WDT prescaler and postscaler (if enabled) will not be cleared, the TO bit will not be set and the PD bit will not be cleared. * If the interrupt occurs during or after the execution of a SLEEP instruction, the device will Immediately wake-up from Sleep. The SLEEP instruction is executed. Therefore, the WDT and WDT prescaler and postscaler (if enabled) will be cleared, the TO bit will be set and the PD bit will be cleared. Even if the flag bits were checked before executing a SLEEP instruction, it may be possible for flag bits to become set before the SLEEP instruction completes. To determine whether a SLEEP instruction executed, test the PD bit. If the PD bit is set, the SLEEP instruction was executed as a NOP. To ensure that the WDT is cleared, a CLRWDT instruction should be executed before a SLEEP instruction. See Figure 12-9 for more details.
12.7.1
WAKE-UP FROM SLEEP
The device can wake-up from Sleep through one of the following events: 1. 2. 3. External Reset input on MCLR pin. Watchdog Timer wake-up (if WDT was enabled). Interrupt from RA2/INT pin, PORTA change or a peripheral interrupt.
The first event will cause a device Reset. The two latter events are considered a continuation of program execution. The TO and PD bits in the STATUS register can be used to determine the cause of device Reset. The PD bit, which is set on power-up, is cleared when Sleep is invoked. TO bit is cleared if WDT wake-up occurred. The following peripheral interrupts can wake the device from Sleep: 1. 2. 3. 4. 5. 6. Timer1 interrupt. Timer1 must be operating as an asynchronous counter. ECCP Capture mode interrupt. A/D conversion (when A/D clock source is RC). Comparator output changes state. Interrupt-on-change. External Interrupt from INT pin.
Other peripherals cannot generate interrupts since during Sleep, no on-chip clocks are present.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 121
PIC16F610/616/16HV610/616
FIGURE 12-9: WAKE-UP FROM SLEEP THROUGH INTERRUPT
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 TOST(2) Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 OSC1 CLKOUT(4) INT pin INTF flag (INTCON reg.) GIE bit (INTCON reg.) Instruction Flow PC Instruction Fetched Instruction Executed Note 1: 2: 3: 4: Processor in Sleep Interrupt Latency (3)
PC Inst(PC) = Sleep Inst(PC - 1)
PC + 1 Inst(PC + 1) Sleep
PC + 2
PC + 2 Inst(PC + 2) Inst(PC + 1)
PC + 2
0004h Inst(0004h)
0005h Inst(0005h) Inst(0004h)
Dummy Cycle
Dummy Cycle
XT, HS or LP Oscillator mode assumed. TOST = 1024 TOSC (drawing not to scale). This delay does not apply to EC, INTOSC and RC Oscillator modes. GIE = `1' assumed. In this case after wake-up, the processor jumps to 0004h. If GIE = `0', execution will continue in-line. CLKOUT is not available in XT, HS, LP or EC Oscillator modes, but shown here for timing reference.
12.8
Code Protection
If the code protection bit(s) have not been programmed, the on-chip program memory can be read out using ICSPTM for verification purposes. Note: The entire Flash program memory will be erased when the code protection is turned off. See the "PIC12F60X/12F61X/16F61X Memory Programming Specification" (DS41284) for more information.
12.9
ID Locations
Four memory locations (2000h-2003h) are designated as ID locations where the user can store checksum or other code identification numbers. These locations are not accessible during normal execution but are readable and writable during Program/Verify mode. Only the Least Significant 7 bits of the ID locations are used.
DS41288C-page 122
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
12.10 In-Circuit Serial ProgrammingTM
The PIC16F610/616/16HV610/616 microcontrollers can be serially programmed while in the end application circuit. This is simply done with five connections for: * * * * * clock data power ground programming voltage
12.11 In-Circuit Debugger
Since in-circuit debugging requires access to three pins, MPLAB(R) ICD 2 development with an 14-pin device is not practical. A special 28-pin PIC16F610/ 616/16HV610/616 ICD device is used with MPLAB ICD 2 to provide separate clock, data and MCLR pins and frees all normally available pins to the user. A special debugging adapter allows the ICD device to be used in place of a PIC16F610/616/16HV610/616 device. The debugging adapter is the only source of the ICD device. When the ICD pin on the PIC16F610/616/16HV610/ 616 ICD device is held low, the In-Circuit Debugger functionality is enabled. This function allows simple debugging functions when used with MPLAB ICD 2. When the microcontroller has this feature enabled, some of the resources are not available for general use. Table 12-9 shows which features are consumed by the background debugger.
This allows customers to manufacture boards with unprogrammed devices and then program the microcontroller just before shipping the product. This also allows the most recent firmware or a custom firmware to be programmed. The device is placed into a Program/Verify mode by holding the RA0 and RA1 pins low, while raising the MCLR (VPP) pin from VIL to VIHH. See the "PIC12F60X/ 12F61X/16F61X Memory Programming Specification" (DS41284) for more information. RA0 becomes the programming data and RA1 becomes the programming clock. Both RA0 and RA1 are Schmitt Trigger inputs in Program/Verify mode. A typical In-Circuit Serial Programming connection is shown in Figure 12-10.
TABLE 12-9:
Resource I/O pins Stack
DEBUGGER RESOURCES
Description ICDCLK, ICDDATA 1 level Address 0h must be NOP 700h-7FFh
Program Memory
FIGURE 12-10:
TYPICAL IN-CIRCUIT SERIAL PROGRAMMING CONNECTION
To Normal Connections
For more information, see "MPLAB(R) ICD 2 In-Circuit Debugger User's Guide" (DS51331), available on Microchip's web site (www.microchip.com).
External Connector Signals +5V 0V VPP CLK Data I/O
FIGURE 12-11:
PIC16F610/16HV610 PIC16F616/16HV616 VDD VSS MCLR/VPP/RA3 RA1 RA0
28-PIN ICD PINOUT
*
28-Pin PDIP In-Circuit Debug Device
VDD CS0 CS1 CS2 RA5 RA4 RA3 RC5 RC4 RC3 NC ICDCLK ICDMCLR ICDDATA
1 2 3 28 27 26
6 7 8 9 10 11 12 13 14
PIC16F616-ICD
4 5
25 24 23 22 21 20 19 18 17 16 15
*
*
*
To Normal Connections * Isolation devices (as required)
GND RA0 RA1 SHUNTEN RA2 RC0 RC1 RC2 NC NC NC NC NC ICD
Note:
To erase, the device VDD must be above the Bulk Erase VDD minimum given in the "PIC12F615/12HV615/16F616/16HV616 Memory Programming Specification" (DS41284)
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 123
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 124
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
13.0 INSTRUCTION SET SUMMARY
TABLE 13-1:
Field
f W b k x
The PIC16F610/616/16HV610/616 instruction set is highly orthogonal and is comprised of three basic categories: * Byte-oriented operations * Bit-oriented operations * Literal and control operations Each PIC16 instruction is a 14-bit word divided into an opcode, which specifies the instruction type and one or more operands, which further specify the operation of the instruction. The formats for each of the categories is presented in Figure 13-1, while the various opcode fields are summarized in Table 13-1. Table 13-2 lists the instructions recognized by the MPASMTM assembler. For byte-oriented instructions, `f' represents a file register designator and `d' represents a destination designator. The file register designator specifies which file register is to be used by the instruction. The destination designator specifies where the result of the operation is to be placed. If `d' is zero, the result is placed in the W register. If `d' is one, the result is placed in the file register specified in the instruction. For bit-oriented instructions, `b' represents a bit field designator, which selects the bit affected by the operation, while `f' represents the address of the file in which the bit is located. For literal and control operations, `k' represents an 8-bit or 11-bit constant, or literal value. One instruction cycle consists of four oscillator periods; for an oscillator frequency of 4 MHz, this gives a normal instruction execution time of 1 s. All instructions are executed within a single instruction cycle, unless a conditional test is true, or the program counter is changed as a result of an instruction. When this occurs, the execution takes two instruction cycles, with the second cycle executed as a NOP. All instruction examples use the format `0xhh' to represent a hexadecimal number, where `h' signifies a hexadecimal digit.
OPCODE FIELD DESCRIPTIONS
Description
Register file address (0x00 to 0x7F) Working register (accumulator) Bit address within an 8-bit file register Literal field, constant data or label Don't care location (= 0 or 1). The assembler will generate code with x = 0. It is the recommended form of use for compatibility with all Microchip software tools. Destination select; d = 0: store result in W, d = 1: store result in file register f. Default is d = 1. Program Counter Time-out bit Carry bit Digit carry bit Zero bit Power-down bit
d
PC TO C DC Z PD
FIGURE 13-1:
GENERAL FORMAT FOR INSTRUCTIONS
0
Byte-oriented file register operations 13 876 OPCODE d f (FILE #) d = 0 for destination W d = 1 for destination f f = 7-bit file register address Bit-oriented file register operations 13 10 9 76 OPCODE b (BIT #) f (FILE #) b = 3-bit bit address f = 7-bit file register address Literal and control operations General 13 8 OPCODE k = 8-bit immediate value CALL and GOTO instructions only 13 11 OPCODE 10 k (literal) 7 k (literal)
0
0
13.1
Read-Modify-Write Operations
Any instruction that specifies a file register as part of the instruction performs a Read-Modify-Write (RMW) operation. The register is read, the data is modified, and the result is stored according to either the instruction or the destination designator `d'. A read operation is performed on a register even if the instruction writes to that register. For example, a CLRF PORTA instruction will read PORTA, clear all the data bits, then write the result back to PORTA. This example would have the unintended consequence of clearing the condition that set the RAIF flag.
0
k = 11-bit immediate value
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 125
PIC16F610/616/16HV610/616
TABLE 13-2:
Mnemonic, Operands
PIC16F610/616/16HV610/616 INSTRUCTION SET
14-Bit Opcode Description Cycles MSb BYTE-ORIENTED FILE REGISTER OPERATIONS LSb Status Affected Notes
ADDWF ANDWF CLRF CLRW COMF DECF DECFSZ INCF INCFSZ IORWF MOVF MOVWF NOP RLF RRF SUBWF SWAPF XORWF
f, d f, d f - f, d f, d f, d f, d f, d f, d f, d f - f, d f, d f, d f, d f, d
Add W and f AND W with f Clear f Clear W Complement f Decrement f Decrement f, Skip if 0 Increment f Increment f, Skip if 0 Inclusive OR W with f Move f Move W to f No Operation Rotate Left f through Carry Rotate Right f through Carry Subtract W from f Swap nibbles in f Exclusive OR W with f
1 1 1 1 1 1 1(2) 1 1(2) 1 1 1 1 1 1 1 1 1
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0111 0101 0001 0001 1001 0011 1011 1010 1111 0100 1000 0000 0000 1101 1100 0010 1110 0110
dfff dfff lfff 0xxx dfff dfff dfff dfff dfff dfff dfff lfff 0xx0 dfff dfff dfff dfff dfff
ffff ffff ffff xxxx ffff ffff ffff ffff ffff ffff ffff ffff 0000 ffff ffff ffff ffff ffff
C, DC, Z Z Z Z Z Z Z Z Z
1, 2 1, 2 2 1, 2 1, 2 1, 2, 3 1, 2 1, 2, 3 1, 2 1, 2
C C C, DC, Z Z
1, 2 1, 2 1, 2 1, 2 1, 2
BIT-ORIENTED FILE REGISTER OPERATIONS BCF BSF BTFSC BTFSS ADDLW ANDLW CALL CLRWDT GOTO IORLW MOVLW RETFIE RETLW RETURN SLEEP SUBLW XORLW Note 1: f, b f, b f, b f, b k k k - k k k - k - - k k Bit Clear f Bit Set f Bit Test f, Skip if Clear Bit Test f, Skip if Set Add literal and W AND literal with W Call Subroutine Clear Watchdog Timer Go to address Inclusive OR literal with W Move literal to W Return from interrupt Return with literal in W Return from Subroutine Go into Standby mode Subtract W from literal Exclusive OR literal with W 1 1 1 (2) 1 (2) 1 1 2 1 2 1 1 2 2 2 1 1 1 01 01 01 01 00bb 01bb 10bb 11bb bfff bfff bfff bfff ffff ffff ffff ffff C, DC, Z Z TO, PD Z 1, 2 1, 2 3 3
LITERAL AND CONTROL OPERATIONS 11 11 10 00 10 11 11 00 11 00 00 11 11 111x 1001 0kkk 0000 1kkk 1000 00xx 0000 01xx 0000 0000 110x 1010 kkkk kkkk kkkk 0110 kkkk kkkk kkkk 0000 kkkk 0000 0110 kkkk kkkk kkkk kkkk kkkk 0100 kkkk kkkk kkkk 1001 kkkk 1000 0011 kkkk kkkk
TO, PD C, DC, Z Z
2: 3:
When an I/O register is modified as a function of itself (e.g., MOVF PORTA, 1), the value used will be that value present on the pins themselves. For example, if the data latch is `1' for a pin configured as input and is driven low by an external device, the data will be written back with a `0'. If this instruction is executed on the TMR0 register (and where applicable, d = 1), the prescaler will be cleared if assigned to the Timer0 module. If the Program Counter (PC) is modified, or a conditional test is true, the instruction requires two cycles. The second cycle is executed as a NOP.
DS41288C-page 126
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
13.2
ADDLW Syntax: Operands: Operation: Status Affected: Description:
Instruction Descriptions
Add literal and W [ label ] ADDLW 0 k 255 (W) + k (W) C, DC, Z The contents of the W register are added to the eight-bit literal `k' and the result is placed in the W register. Operation: Status Affected: Description: k BCF Syntax: Operands: Bit Clear f [ label ] BCF 0 f 127 0b7 0 (f) None Bit `b' in register `f' is cleared. f,b
ADDWF Syntax: Operands: Operation: Status Affected: Description:
Add W and f [ label ] ADDWF 0 f 127 d [0,1] (W) + (f) (destination) C, DC, Z Add the contents of the W register with register `f'. If `d' is `0', the result is stored in the W register. If `d' is `1', the result is stored back in register `f'. f,d
BSF Syntax: Operands: Operation: Status Affected: Description:
Bit Set f [ label ] BSF 0 f 127 0b7 1 (f) None Bit `b' in register `f' is set. f,b
ANDLW Syntax: Operands: Operation: Status Affected: Description:
AND literal with W [ label ] ANDLW 0 k 255 (W) .AND. (k) (W) Z The contents of W register are AND'ed with the eight-bit literal `k'. The result is placed in the W register. k
BTFSC Syntax: Operands: Operation: Status Affected: Description:
Bit Test f, Skip if Clear [ label ] BTFSC f,b 0 f 127 0b7 skip if (f) = 0 None If bit `b' in register `f' is `1', the next instruction is executed. If bit `b' in register `f' is `0', the next instruction is discarded, and a NOP is executed instead, making this a two-cycle instruction.
ANDWF Syntax: Operands: Operation: Status Affected: Description:
AND W with f [ label ] ANDWF 0 f 127 d [0,1] (W) .AND. (f) (destination) Z AND the W register with register `f'. If `d' is `0', the result is stored in the W register. If `d' is `1', the result is stored back in register `f'. f,d
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 127
PIC16F610/616/16HV610/616
BTFSS Syntax: Operands: Operation: Status Affected: Description: Bit Test f, Skip if Set [ label ] BTFSS f,b 0 f 127 0b<7 skip if (f) = 1 None If bit `b' in register `f' is `0', the next instruction is executed. If bit `b' is `1', then the next instruction is discarded and a NOP is executed instead, making this a two-cycle instruction. Status Affected: Description: CLRWDT Syntax: Operands: Operation: Clear Watchdog Timer [ label ] CLRWDT None 00h WDT 0 WDT prescaler, 1 TO 1 PD TO, PD CLRWDT instruction resets the Watchdog Timer. It also resets the prescaler of the WDT. Status bits TO and PD are set.
CALL Syntax: Operands: Operation:
Call Subroutine [ label ] CALL k 0 k 2047 (PC)+ 1 TOS, k PC<10:0>, (PCLATH<4:3>) PC<12:11> None Call Subroutine. First, return address (PC + 1) is pushed onto the stack. The eleven-bit immediate address is loaded into PC bits <10:0>. The upper bits of the PC are loaded from PCLATH. CALL is a two-cycle instruction.
COMF Syntax: Operands: Operation: Status Affected: Description:
Complement f [ label ] COMF 0 f 127 d [0,1] (f) (destination) Z The contents of register `f' are complemented. If `d' is `0', the result is stored in W. If `d' is `1', the result is stored back in register `f'. f,d
Status Affected: Description:
CLRF Syntax: Operands: Operation: Status Affected: Description:
Clear f [ label ] CLRF 0 f 127 00h (f) 1Z Z The contents of register `f' are cleared and the Z bit is set. f
DECF Syntax: Operands: Operation: Status Affected: Description:
Decrement f [ label ] DECF f,d 0 f 127 d [0,1] (f) - 1 (destination) Z Decrement register `f'. If `d' is `0', the result is stored in the W register. If `d' is `1', the result is stored back in register `f'.
CLRW Syntax: Operands: Operation: Status Affected: Description:
Clear W [ label ] CLRW None 00h (W) 1Z Z W register is cleared. Zero bit (Z) is set.
DS41288C-page 128
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
DECFSZ Syntax: Operands: Operation: Status Affected: Description: Decrement f, Skip if 0 [ label ] DECFSZ f,d 0 f 127 d [0,1] (f) - 1 (destination); skip if result = 0 None The contents of register `f' are decremented. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed back in register `f'. If the result is `1', the next instruction is executed. If the result is `0', then a NOP is executed instead, making it a two-cycle instruction. INCFSZ Syntax: Operands: Operation: Status Affected: Description: Increment f, Skip if 0 [ label ] INCFSZ f,d 0 f 127 d [0,1] (f) + 1 (destination), skip if result = 0 None The contents of register `f' are incremented. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed back in register `f'. If the result is `1', the next instruction is executed. If the result is `0', a NOP is executed instead, making it a two-cycle instruction.
GOTO Syntax: Operands: Operation: Status Affected: Description:
Unconditional Branch [ label ] GOTO k 0 k 2047 k PC<10:0> PCLATH<4:3> PC<12:11> None GOTO is an unconditional branch. The eleven-bit immediate value is loaded into PC bits <10:0>. The upper bits of PC are loaded from PCLATH<4:3>. GOTO is a two-cycle instruction.
IORLW Syntax: Operands: Operation: Status Affected: Description:
Inclusive OR literal with W [ label ] IORLW k 0 k 255 (W) .OR. k (W) Z The contents of the W register are OR'ed with the eight-bit literal `k'. The result is placed in the W register.
INCF Syntax: Operands: Operation: Status Affected: Description:
Increment f [ label ] INCF f,d 0 f 127 d [0,1] (f) + 1 (destination) Z The contents of register `f' are incremented. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed back in register `f'.
IORWF Syntax: Operands: Operation: Status Affected: Description:
Inclusive OR W with f [ label ] IORWF f,d 0 f 127 d [0,1] (W) .OR. (f) (destination) Z Inclusive OR the W register with register `f'. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed back in register `f'.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 129
PIC16F610/616/16HV610/616
MOVF Syntax: Operands: Operation: Status Affected: Description: Move f [ label ] MOVF f,d 0 f 127 d [0,1] (f) (dest) Z The contents of register `f' is moved to a destination dependent upon the status of `d'. If d = 0, destination is W register. If d = 1, the destination is file register `f' itself. d = 1 is useful to test a file register since status flag Z is affected. 1 1
MOVF FSR, 0
MOVWF Syntax: Operands: Operation: Status Affected: Description: Words: Cycles: Example:
Move W to f [ label ] (W) (f) None Move data from W register to register `f'. 1 1 MOVW F OPTION MOVWF f 0 f 127
Words: Cycles: Example:
Before Instruction OPTION = W = After Instruction OPTION = W =
0xFF 0x4F 0x4F 0x4F
After Instruction W= value in FSR register Z=1
MOVLW Syntax: Operands: Operation: Status Affected: Description:
Move literal to W [ label ] k (W) None The eight-bit literal `k' is loaded into W register. The "don't cares" will assemble as `0's. 1 1
MOVLW 0x5A
NOP Syntax: Operands: Operation: Status Affected: Description: Words: Cycles: Example:
No Operation [ label ] None No operation None No operation. 1 1
NOP
MOVLW k
NOP
0 k 255
Words: Cycles: Example:
After Instruction W=
0x5A
DS41288C-page 130
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
RETFIE Syntax: Operands: Operation: Status Affected: Description: Return from Interrupt [ label ] None TOS PC, 1 GIE None Return from Interrupt. Stack is POPed and Top-of-Stack (TOS) is loaded in the PC. Interrupts are enabled by setting Global Interrupt Enable bit, GIE (INTCON<7>). This is a two-cycle instruction. 1 2
RETFIE
RETLW Syntax: Operands: Operation: Status Affected: Description:
Return with literal in W [ label ] RETLW k 0 k 255 k (W); TOS PC None The W register is loaded with the eight-bit literal `k'. The program counter is loaded from the top of the stack (the return address). This is a two-cycle instruction. 1 2 CALL TABLE;W contains ;table offset ;value GOTO DONE * * ADDWF PC ;W = offset RETLW k1 ;Begin table RETLW k2 ; * * * RETLW kn ;End of table Before Instruction W = 0x07 After Instruction W = value of k8
RETFIE
Words: Cycles: Example:
Words: Cycles: Example:
After Interrupt PC = GIE =
TOS 1
TABLE
DONE
RETURN Syntax: Operands: Operation: Status Affected: Description:
Return from Subroutine [ label ] None TOS PC None Return from subroutine. The stack is POPed and the top of the stack (TOS) is loaded into the program counter. This is a two-cycle instruction. RETURN
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 131
PIC16F610/616/16HV610/616
RLF Syntax: Operands: Operation: Status Affected: Description: Rotate Left f through Carry [ label ] 0 f 127 d [0,1] See description below C The contents of register `f' are rotated one bit to the left through the Carry flag. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is stored back in register `f'.
C Register f
SLEEP Syntax: Operands: Operation:
Enter Sleep mode [ label ] SLEEP None 00h WDT, 0 WDT prescaler, 1 TO, 0 PD TO, PD The power-down Status bit, PD is cleared. Time-out Status bit, TO is set. Watchdog Timer and its prescaler are cleared. The processor is put into Sleep mode with the oscillator stopped.
RLF
f,d
Status Affected: Description:
Words: Cycles: Example:
1 1
RLF REG1,0 REG1 C = = = = = 1110 0110 0 1110 0110 1100 1100 1
Before Instruction
After Instruction
REG1 W C
RRF Syntax: Operands: Operation: Status Affected: Description:
Rotate Right f through Carry [ label ] RRF f,d 0 f 127 d [0,1] See description below C The contents of register `f' are rotated one bit to the right through the Carry flag. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed back in register `f'.
C Register f
SUBLW Syntax: Operands: Operation: Description:
Subtract W from literal [ label ] SUBLW k 0 k 255 k - (W) (W) The W register is subtracted (2's complement method) from the eight-bit literal `k'. The result is placed in the W register. Result C=0 C=1 DC = 0 DC = 1 Condition W>k Wk W<3:0> > k<3:0> W<3:0> k<3:0>
Status Affected: C, DC, Z
DS41288C-page 132
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
SUBWF Syntax: Operands: Operation: Description: Subtract W from f [ label ] SUBWF f,d 0 f 127 d [0,1] (f) - (W) (destination) Subtract (2's complement method) W register from register `f'. If `d' is `0', the result is stored in the W register. If `d' is `1', the result is stored back in register `f'. C=0 C=1 DC = 0 DC = 1 W>f Wf W<3:0> > f<3:0> W<3:0> f<3:0> XORWF Syntax: Operands: Operation: Status Affected: Description: Exclusive OR W with f [ label ] XORWF 0 f 127 d [0,1] (W) .XOR. (f) (destination) Z Exclusive OR the contents of the W register with register `f'. If `d' is `0', the result is stored in the W register. If `d' is `1', the result is stored back in register `f'. f,d
Status Affected: C, DC, Z
SWAPF Syntax: Operands: Operation: Status Affected: Description:
Swap Nibbles in f [ label ] SWAPF f,d 0 f 127 d [0,1] (f<3:0>) (destination<7:4>), (f<7:4>) (destination<3:0>) None The upper and lower nibbles of register `f' are exchanged. If `d' is `0', the result is placed in the W register. If `d' is `1', the result is placed in register `f'.
XORLW Syntax: Operands: Operation: Status Affected: Description:
Exclusive OR literal with W [ label ] XORLW k 0 k 255 (W) .XOR. k (W) Z The contents of the W register are XOR'ed with the eight-bit literal `k'. The result is placed in the W register.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 133
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 134
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
14.0 DEVELOPMENT SUPPORT
14.1
The PIC(R) microcontrollers are supported with a full range of hardware and software development tools: * Integrated Development Environment - MPLAB(R) IDE Software * Assemblers/Compilers/Linkers - MPASMTM Assembler - MPLAB C18 and MPLAB C30 C Compilers - MPLINKTM Object Linker/ MPLIBTM Object Librarian - MPLAB ASM30 Assembler/Linker/Library * Simulators - MPLAB SIM Software Simulator * Emulators - MPLAB ICE 2000 In-Circuit Emulator - MPLAB REAL ICETM In-Circuit Emulator * In-Circuit Debugger - MPLAB ICD 2 * Device Programmers - PICSTART(R) Plus Development Programmer - MPLAB PM3 Device Programmer - PICkitTM 2 Development Programmer * Low-Cost Demonstration and Development Boards and Evaluation Kits
MPLAB Integrated Development Environment Software
The MPLAB IDE software brings an ease of software development previously unseen in the 8/16-bit microcontroller market. The MPLAB IDE is a Windows(R) operating system-based application that contains: * A single graphical interface to all debugging tools - Simulator - Programmer (sold separately) - Emulator (sold separately) - In-Circuit Debugger (sold separately) * A full-featured editor with color-coded context * A multiple project manager * Customizable data windows with direct edit of contents * High-level source code debugging * Visual device initializer for easy register initialization * Mouse over variable inspection * Drag and drop variables from source to watch windows * Extensive on-line help * Integration of select third party tools, such as HI-TECH Software C Compilers and IAR C Compilers The MPLAB IDE allows you to: * Edit your source files (either assembly or C) * One touch assemble (or compile) and download to PIC MCU emulator and simulator tools (automatically updates all project information) * Debug using: - Source files (assembly or C) - Mixed assembly and C - Machine code MPLAB IDE supports multiple debugging tools in a single development paradigm, from the cost-effective simulators, through low-cost in-circuit debuggers, to full-featured emulators. This eliminates the learning curve when upgrading to tools with increased flexibility and power.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 135
PIC16F610/616/16HV610/616
14.2 MPASM Assembler 14.5
The MPASM Assembler is a full-featured, universal macro assembler for all PIC MCUs. The MPASM Assembler generates relocatable object files for the MPLINK Object Linker, Intel(R) standard HEX files, MAP files to detail memory usage and symbol reference, absolute LST files that contain source lines and generated machine code and COFF files for debugging. The MPASM Assembler features include: * Integration into MPLAB IDE projects * User-defined macros to streamline assembly code * Conditional assembly for multi-purpose source files * Directives that allow complete control over the assembly process
MPLAB ASM30 Assembler, Linker and Librarian
MPLAB ASM30 Assembler produces relocatable machine code from symbolic assembly language for dsPIC30F devices. MPLAB C30 C Compiler uses the assembler to produce its object file. The assembler generates relocatable object files that can then be archived or linked with other relocatable object files and archives to create an executable file. Notable features of the assembler include: * * * * * * Support for the entire dsPIC30F instruction set Support for fixed-point and floating-point data Command line interface Rich directive set Flexible macro language MPLAB IDE compatibility
14.6 14.3 MPLAB C18 and MPLAB C30 C Compilers
MPLAB SIM Software Simulator
The MPLAB C18 and MPLAB C30 Code Development Systems are complete ANSI C compilers for Microchip's PIC18 and PIC24 families of microcontrollers and the dsPIC30 and dsPIC33 family of digital signal controllers. These compilers provide powerful integration capabilities, superior code optimization and ease of use not found with other compilers. For easy source level debugging, the compilers provide symbol information that is optimized to the MPLAB IDE debugger.
The MPLAB SIM Software Simulator allows code development in a PC-hosted environment by simulating the PIC MCUs and dsPIC(R) DSCs on an instruction level. On any given instruction, the data areas can be examined or modified and stimuli can be applied from a comprehensive stimulus controller. Registers can be logged to files for further run-time analysis. The trace buffer and logic analyzer display extend the power of the simulator to record and track program execution, actions on I/O, most peripherals and internal registers. The MPLAB SIM Software Simulator fully supports symbolic debugging using the MPLAB C18 and MPLAB C30 C Compilers, and the MPASM and MPLAB ASM30 Assemblers. The software simulator offers the flexibility to develop and debug code outside of the hardware laboratory environment, making it an excellent, economical software development tool.
14.4
MPLINK Object Linker/ MPLIB Object Librarian
The MPLINK Object Linker combines relocatable objects created by the MPASM Assembler and the MPLAB C18 C Compiler. It can link relocatable objects from precompiled libraries, using directives from a linker script. The MPLIB Object Librarian manages the creation and modification of library files of precompiled code. When a routine from a library is called from a source file, only the modules that contain that routine will be linked in with the application. This allows large libraries to be used efficiently in many different applications. The object linker/library features include: * Efficient linking of single libraries instead of many smaller files * Enhanced code maintainability by grouping related modules together * Flexible creation of libraries with easy module listing, replacement, deletion and extraction
DS41288C-page 136
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
14.7 MPLAB ICE 2000 High-Performance In-Circuit Emulator 14.9 MPLAB ICD 2 In-Circuit Debugger
Microchip's In-Circuit Debugger, MPLAB ICD 2, is a powerful, low-cost, run-time development tool, connecting to the host PC via an RS-232 or high-speed USB interface. This tool is based on the Flash PIC MCUs and can be used to develop for these and other PIC MCUs and dsPIC DSCs. The MPLAB ICD 2 utilizes the in-circuit debugging capability built into the Flash devices. This feature, along with Microchip's In-Circuit Serial ProgrammingTM (ICSPTM) protocol, offers costeffective, in-circuit Flash debugging from the graphical user interface of the MPLAB Integrated Development Environment. This enables a designer to develop and debug source code by setting breakpoints, single stepping and watching variables, and CPU status and peripheral registers. Running at full speed enables testing hardware and applications in real time. MPLAB ICD 2 also serves as a development programmer for selected PIC devices.
The MPLAB ICE 2000 In-Circuit Emulator is intended to provide the product development engineer with a complete microcontroller design tool set for PIC microcontrollers. Software control of the MPLAB ICE 2000 In-Circuit Emulator is advanced by the MPLAB Integrated Development Environment, which allows editing, building, downloading and source debugging from a single environment. The MPLAB ICE 2000 is a full-featured emulator system with enhanced trace, trigger and data monitoring features. Interchangeable processor modules allow the system to be easily reconfigured for emulation of different processors. The architecture of the MPLAB ICE 2000 In-Circuit Emulator allows expansion to support new PIC microcontrollers. The MPLAB ICE 2000 In-Circuit Emulator system has been designed as a real-time emulation system with advanced features that are typically found on more expensive development tools. The PC platform and Microsoft(R) Windows(R) 32-bit operating system were chosen to best make these features available in a simple, unified application.
14.10 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal, CE compliant device programmer with programmable voltage verification at VDDMIN and VDDMAX for maximum reliability. It features a large LCD display (128 x 64) for menus and error messages and a modular, detachable socket assembly to support various package types. The ICSPTM cable assembly is included as a standard item. In Stand-Alone mode, the MPLAB PM3 Device Programmer can read, verify and program PIC devices without a PC connection. It can also set code protection in this mode. The MPLAB PM3 connects to the host PC via an RS-232 or USB cable. The MPLAB PM3 has high-speed communications and optimized algorithms for quick programming of large memory devices and incorporates an SD/MMC card for file storage and secure data applications.
14.8
MPLAB REAL ICE In-Circuit Emulator System
MPLAB REAL ICE In-Circuit Emulator System is Microchip's next generation high-speed emulator for Microchip Flash DSC(R) and MCU devices. It debugs and programs PIC(R) and dsPIC(R) Flash microcontrollers with the easy-to-use, powerful graphical user interface of the MPLAB Integrated Development Environment (IDE), included with each kit. The MPLAB REAL ICE probe is connected to the design engineer's PC using a high-speed USB 2.0 interface and is connected to the target with either a connector compatible with the popular MPLAB ICD 2 system (RJ11) or with the new high speed, noise tolerant, lowvoltage differential signal (LVDS) interconnection (CAT5). MPLAB REAL ICE is field upgradeable through future firmware downloads in MPLAB IDE. In upcoming releases of MPLAB IDE, new devices will be supported, and new features will be added, such as software breakpoints and assembly code trace. MPLAB REAL ICE offers significant advantages over competitive emulators including low-cost, full-speed emulation, real-time variable watches, trace analysis, complex breakpoints, a ruggedized probe interface and long (up to three meters) interconnection cables.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 137
PIC16F610/616/16HV610/616
14.11 PICSTART Plus Development Programmer
The PICSTART Plus Development Programmer is an easy-to-use, low-cost, prototype programmer. It connects to the PC via a COM (RS-232) port. MPLAB Integrated Development Environment software makes using the programmer simple and efficient. The PICSTART Plus Development Programmer supports most PIC devices in DIP packages up to 40 pins. Larger pin count devices, such as the PIC16C92X and PIC17C76X, may be supported with an adapter socket. The PICSTART Plus Development Programmer is CE compliant.
14.13 Demonstration, Development and Evaluation Boards
A wide variety of demonstration, development and evaluation boards for various PIC MCUs and dsPIC DSCs allows quick application development on fully functional systems. Most boards include prototyping areas for adding custom circuitry and provide application firmware and source code for examination and modification. The boards support a variety of features, including LEDs, temperature sensors, switches, speakers, RS-232 interfaces, LCD displays, potentiometers and additional EEPROM memory. The demonstration and development boards can be used in teaching environments, for prototyping custom circuits and for learning about various microcontroller applications. In addition to the PICDEMTM and dsPICDEMTM demonstration/development board series of circuits, Microchip has a line of evaluation kits and demonstration software for analog filter design, KEELOQ(R) security ICs, CAN, IrDA(R), PowerSmart(R) battery management, SEEVAL(R) evaluation system, Sigma-Delta ADC, flow rate sensing, plus many more. Check the Microchip web page (www.microchip.com) and the latest "Product Selector Guide" (DS00148) for the complete list of demonstration, development and evaluation kits.
14.12 PICkit 2 Development Programmer
The PICkitTM 2 Development Programmer is a low-cost programmer and selected Flash device debugger with an easy-to-use interface for programming many of Microchip's baseline, mid-range and PIC18F families of Flash memory microcontrollers. The PICkit 2 Starter Kit includes a prototyping development board, twelve sequential lessons, software and HI-TECH's PICCTM Lite C compiler, and is designed to help get up to speed quickly using PIC(R) microcontrollers. The kit provides everything needed to program, evaluate and develop applications using Microchip's powerful, mid-range Flash memory family of microcontrollers.
DS41288C-page 138
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
15.0 ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings()
Ambient temperature under bias..........................................................................................................-40 to +125C Storage temperature ........................................................................................................................ -65C to +150C Voltage on VDD with respect to VSS ................................................................................................... -0.3V to +6.5V Voltage on MCLR with respect to Vss ............................................................................................... -0.3V to +13.5V Voltage on all other pins with respect to VSS ........................................................................... -0.3V to (VDD + 0.3V) Total power dissipation(1) ............................................................................................................................... 800 mW Maximum current out of VSS pin ...................................................................................................................... 95 mA Maximum current into VDD pin ......................................................................................................................... 95 mA Input clamp current, IIK (VI < 0 or VI > VDD)............................................................................................................... 20 mA Output clamp current, IOK (Vo < 0 or Vo >VDD)......................................................................................................... 20 mA Maximum output current sunk by any I/O pin.................................................................................................... 25 mA Maximum output current sourced by any I/O pin .............................................................................................. 25 mA Maximum current sunk by PORTA and PORTC (combined) ........................................................................... 90 mA Maximum current sourced PORTA and PORTC (combined) ........................................................................... 90 mA Note 1: Power dissipation is calculated as follows: PDIS = VDD x {IDD - IOH} + {(VDD - VOH) x IOH} + (VOl x IOL).
NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure above maximum rating conditions for extended periods may affect device reliability.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 139
PIC16F610/616/16HV610/616
FIGURE 15-1: PIC16F610/616 VOLTAGE-FREQUENCY GRAPH, -40C TA +125C
5.5 5.0 4.5 VDD (V) 4.0 3.5 3.0 2.5 2.0 0 8 10 Frequency (MHz) Note 1: The shaded region indicates the permissible combinations of voltage and frequency. 20
FIGURE 15-2:
PIC16HV610/616 VOLTAGE-FREQUENCY GRAPH, -40C TA +125C
5.0 4.5 VDD (V) 4.0 3.5 3.0 2.5 2.0 0 8 10 Frequency (MHz) Note 1: The shaded region indicates the permissible combinations of voltage and frequency. 20
DS41288C-page 140
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 15-3: PIC16F610/616 VOLTAGE-FREQUENCY GRAPH, -40C TA +125C
125 5% 85 Temperature (C)
60
2%
25
1%
0
2.0
2.5
3.0
3.5
4.0 VDD (V)
4.5
5.0
5.5
FIGURE 15-4:
PIC16HV610/616 VOLTAGE-FREQUENCY GRAPH, -40C TA +125C
125 5% 85 Temperature (C)
60
2%
25
1%
0
2.0
2.5
3.0
3.5 VDD (V)
4.0
4.5
5.0
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 141
PIC16F610/616/16HV610/616
15.1 DC Characteristics: PIC16F610/616/16HV610/616-I (Industrial) PIC16F610/616/16HV610/616-E (Extended)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +85C for industrial -40C TA +125C for extended Min Typ Max Units Conditions
DC CHARACTERISTICS Param No. D001 D001 D001B D001B D001C D001C D001D D001D D002* D003 VDR VPOR
Sym VDD
Characteristic Supply Voltage PIC16F610/616 PIC16HV610/616 PIC16F610/616 PIC16HV610/616 PIC16F610/616 PIC16HV610/616 PIC16F610/616 PIC16HV610/616 RAM Data Retention Voltage(1) VDD Start Voltage to ensure internal Power-on Reset signal VDD Rise Rate to ensure internal Power-on Reset signal
2.0 2.0 2.0 2.0 3.0 3.0 4.5 4.5 1.5 --
-- -- -- -- -- -- -- -- -- VSS
5.5 5.0 5.5 5.0 5.5 5.0 5.5 5.0 -- --
V V V V V V V V V V
FOSC < = 4 MHz FOSC < = 4 MHz FOSC < = 8 MHz FOSC < = 8 MHz FOSC < = 10 MHz FOSC < = 10 MHz FOSC < = 20 MHz FOSC < = 20 MHz Device in Sleep mode See Section 12.3.1 "Power-on Reset (POR)" for details.
D004*
SVDD
0.05
--
--
V/ms See Section 12.3.1 "Power-on Reset (POR)" for details.
* These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
DS41288C-page 142
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
15.2 DC Characteristics: PIC16F610/616/16HV610/616-I (Industrial) PIC16F610/616/16HV610/616-E (Extended)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +85C for industrial -40C TA +125C for extended Conditions Device Characteristics Supply Current (IDD)(1, 2) Min -- -- -- D011* -- -- -- D012 -- -- -- D013* -- -- -- D014 -- -- -- D016* -- -- -- D017 -- -- -- D018 -- -- -- D019 -- -- Typ 11 18 35 140 220 380 260 420 0.8 130 215 360 220 375 0.65 340 500 0.8 410 700 1.30 230 400 0.63 2.6 2.8 Max 16 28 54 240 380 550 360 650 1.1 220 360 520 340 550 1.0 450 700 1.2 650 950 1.65 400 680 1.1 3.25 3.35 Units VDD A A A A A A A A mA A A A A A mA A A mA A A mA A A mA mA mA 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 4.5 5.0 FOSC = 20 MHz HS Oscillator mode FOSC = 4 MHz EXTRC mode(3) FOSC = 8 MHz INTOSC mode FOSC = 4 MHz INTOSC mode FOSC = 4 MHz EC Oscillator mode FOSC = 1 MHz EC Oscillator mode FOSC = 4 MHz XT Oscillator mode FOSC = 1 MHz XT Oscillator mode Note FOSC = 32 kHz LP Oscillator mode
DC CHARACTERISTICS
Param No. D010
* These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: The test conditions for all IDD measurements in active operation mode are: OSC1 = external square wave, from rail-to-rail; all I/O pins tri-stated, pulled to VDD; MCLR = VDD; WDT disabled. 2: The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an impact on the current consumption. 3: For RC oscillator configurations, current through REXT is not included. The current through the resistor can be extended by the formula IR = VDD/2REXT (mA) with REXT in k.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 143
PIC16F610/616/16HV610/616
15.3 DC Characteristics: PIC16F616/16HV616- I (Industrial)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +85C for industrial Conditions Device Characteristics Power-down Base Current(IPD)(2) PIC16F610/616 Min -- -- -- -- -- PIC16HV610/616 D021 -- 4 -- -- -- D022 D023 -- -- -- -- -- D024 -- -- -- D025* -- -- -- D026 -- -- -- D027 -- -- Typ 0.05 0.15 0.35 150 350 350 -- 1 2 8 3 4 32 60 120 30 45 75 39 59 98 45 5.0 6.0 0.30 0.36 Max 1.2 1.5 1.8 500 -- -- 50 TBD TBD TBD TBD TBD TBD TBD TBD 30 55 95 47 72 124 7.0 8.0 12 1.6 1.9 Units VDD A A A nA A A mA A A A A A A A A A A A A A A A A A A A 2.0 3.0 5.0 3.0 2.0 3.0 5.0 2.0 3.0 5.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 3.0 5.0 A/D Current(1), no conversion in progress T1OSC Current(1), 32.768 kHz CVREF Current(1) (low range) CVREF Current(1) (high range) Comparator Current(1), both comparators enabled BOR Current(1) NOTE 3 WDT Current(1) -40C TA +25C Note WDT, BOR, Comparators, VREF and T1OSC disabled
DC CHARACTERISTICS Param No. D020
Legend: TBD = To Be Determined * These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: The peripheral current is the sum of the base IDD or IPD and the additional current consumed when this peripheral is enabled. The peripheral current can be determined by subtracting the base IDD or IPD current from this limit. Max values should be used when calculating total current consumption. 2: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured with the part in Sleep mode, with all I/O pins in high-impedance state and tied to VDD. 3: Shunt regulator is always enabled and always draws operating current.
DS41288C-page 144
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
15.4
DC Characteristics: PIC16F610/616/16HV610/616-E (Extended)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C for extended Conditions Device Characteristics Power-down Base Current (IPD)(2) PIC16F610/616 PIC16HV610/616 D021E Min -- -- -- -- -- 4 -- -- -- D022E D023E -- -- -- -- -- D024E -- -- -- D025E* -- -- -- D026E -- -- -- D027E -- -- Typ 0.05 0.15 0.35 350 350 -- 1 2 8 3 4 32 60 120 30 45 75 39 59 98 4.5 5 6 0.30 0.36 Max 9 11 15 -- -- 200 TBD TBD TBD TBD TBD TBD TBD TBD 70 90 120 91 117 156 25 30 40 12 16 Units VDD A A A A A nA A A A A A A A A A A A A A A A A A A A 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 2.0 3.0 5.0 3.0 5.0 A/D Current(1), no conversion in progress T1OSC Current(1), 32.768 kHz CVREF Current(1) (low range) CVREF Current(1) (high range) Comparator Current(1), both comparators enabled BOR Current(1) Note 3 WDT Current(1) Note WDT, BOR, Comparators, VREF and T1OSC disabled
DC CHARACTERISTICS Param No. D020E
* These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: The peripheral current is the sum of the base IDD or IPD and the additional current consumed when this peripheral is enabled. The peripheral current can be determined by subtracting the base IDD or IPD current from this limit. Max values should be used when calculating total current consumption. 2: The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured with the part in Sleep mode, with all I/O pins in high-impedance state and tied to VDD. 3: Shunt regulator is always enabled and always draws operating current.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 145
PIC16F610/616/16HV610/616
15.5 DC Characteristics: PIC16F610/616/16HV610/616-I (Industrial) PIC16F610/616/16HV610/616-E (Extended)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +85C for industrial -40C TA +125C for extended Characteristic Input Low Voltage I/O port: D030 D030A D031 D032 D033 D033A VIH D040 D040A D041 D042 D043 D043A D043B IIL D060 D061 D063 D070* D080 VOH D090 * Note 1: 2: 3: 4: IPUR VOL with Schmitt Trigger buffer MCLR OSC1 (XT and LP modes) OSC1 (HS mode) OSC1 (RC mode) Input Leakage Current(2) I/O ports MCLR(3) OSC1 PORTA Weak Pull-up Current Output Low Voltage(4) I/O ports Output High Voltage(4) I/O ports VDD - 0.7 -- -- V IOH = -3.0 mA, VDD = 4.5V (Ind.) -- -- 0.6 V IOL = 8.5 mA, VDD = 4.5V (Ind.) -- -- -- 50 0.1 0.1 0.1 250 1 5 5 400 A A A A VSS VPIN VDD, Pin at high-impedance VSS VPIN VDD VSS VPIN VDD, XT, HS and LP oscillator configuration VDD = 5.0V, VPIN = VSS with Schmitt Trigger buffer MCLR, OSC1 (RC mode)(1) OSC1 (XT and LP modes) OSC1 (HS mode) Input High Voltage I/O ports: with TTL buffer 2.0 0.25 VDD + 0.8 0.8 VDD 0.8 VDD 1.6 0.7 VDD 0.9 VDD -- -- -- -- -- -- -- -- VDD VDD VDD VDD VDD VDD VDD V V V V V V V (Note 1) 4.5V VDD 5.5V 2.0V VDD 4.5V 2.0V VDD 5.5V with TTL buffer Vss Vss Vss VSS VSS VSS -- -- -- -- -- -- 0.8 0.15 VDD 0.2 VDD 0.2 VDD 0.3 0.3 VDD V V V V V V 4.5V VDD 5.5V 2.0V VDD 4.5V 2.0V VDD 5.5V Min Typ Max Units Conditions
DC CHARACTERISTICS Param No.
Sym VIL
These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. In RC oscillator configuration, the OSC1/CLKIN pin is a Schmitt Trigger input. It is not recommended to use an external clock in RC mode. Negative current is defined as current sourced by the pin. The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified levels represent normal operating conditions. Higher leakage current may be measured at different input voltages. Including OSC2 in CLKOUT mode.
DS41288C-page 146
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
15.5 DC Characteristics: PIC16F610/616/16HV610/616-I (Industrial) PIC16F610/616/16HV610/616-E (Extended) (Continued)
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +85C for industrial -40C TA +125C for extended Characteristic Capacitive Loading Specs on Output Pins D101* COSC2 OSC2 pin -- -- 15 pF In XT, HS and LP modes when external clock is used to drive OSC1 Min Typ Max Units Conditions
DC CHARACTERISTICS Param No.
Sym
D101A* CIO D130 D130A D131 D132 D133 D134 EP ED VPR VPEW TPEW TRETD * Note 1: 2: 3: 4:
All I/O pins Program Flash Memory Cell Endurance Cell Endurance VDD for Read VDD for Erase/Write Erase/Write cycle time Characteristic Retention
-- 10K 1K VMIN 4.5 -- 40
-- 100K 10K -- -- 2 --
50 -- -- 5.5 5.5 2.5 --
pF E/W E/W V V ms Year Provided no other specifications are violated -40C TA +85C +85C TA +125C VMIN = Minimum operating voltage
These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. In RC oscillator configuration, the OSC1/CLKIN pin is a Schmitt Trigger input. It is not recommended to use an external clock in RC mode. Negative current is defined as current sourced by the pin. The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified levels represent normal operating conditions. Higher leakage current may be measured at different input voltages. Including OSC2 in CLKOUT mode.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 147
PIC16F610/616/16HV610/616
15.6 Thermal Considerations
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Param No. TH01 JA Sym Characteristic Thermal Resistance Junction to Ambient Typ 70 85.0 100 46.3 32.5 31.0 31.7 2.6 150 -- -- Units C/W C/W C/W C/W C/W C/W C/W C/W C W W Conditions 14-pin PDIP package 14-pin SOIC package 14-pin TSSOP package 16-pin QFN 4x4mm package 14-pin PDIP package 14-pin SOIC package 14-pin TSSOP package 16-pin QFN 4x4mm package
TH02
JC
Thermal Resistance Junction to Case
TH03 TH04 TH05 TH06 TH07 Note 1: 2:
PD = PINTERNAL + PI/O PINTERNAL = IDD x VDD (NOTE 1) PI/O I/O Power Dissipation -- W PI/O = (IOL * VOL) + (IOH * (VDD - VOH)) PDER Derated Power -- W PDER = PDMAX (TDIE - TA)/JA (NOTE 2) IDD is current to run the chip alone without driving any load on the output pins. TA = Ambient Temperature.
TDIE Die Temperature PD Power Dissipation PINTERNAL Internal Power Dissipation
DS41288C-page 148
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
15.7 Timing Parameter Symbology
The timing parameter symbols have been created with one of the following formats: 1. TppS2ppS 2. TppS T F Frequency Lowercase letters (pp) and their meanings: pp cc CCP1 ck CLKOUT cs CS di SDI do SDO dt Data in io I/O Port mc MCLR Uppercase letters and their meanings: S F Fall H High I Invalid (High-impedance) L Low
T
Time
osc rd rw sc ss t0 t1 wr
OSC1 RD RD or WR SCK SS T0CKI T1CKI WR
P R V Z
Period Rise Valid High-impedance
FIGURE 15-5:
LOAD CONDITIONS
Load Condition
Pin
CL
VSS
Legend: CL = 50 pF for all pins 15 pF for OSC2 output
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 149
PIC16F610/616/16HV610/616
15.8 AC Characteristics: PIC16F610/616/16HV610/616 (Industrial, Extended)
CLOCK TIMING
Q4 Q1 Q2 Q3 Q4 Q1
FIGURE 15-6:
OSC1/CLKIN OS02 OS04 OS03 OSC2/CLKOUT (LP,XT,HS Modes) OS04
OSC2/CLKOUT (CLKOUT Mode)
TABLE 15-1:
CLOCK OSCILLATOR TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Param No. OS01 Sym FOSC Characteristic External CLKIN Frequency(1) Min DC DC DC DC Oscillator Frequency(1) -- 0.1 1 DC OS02 TOSC External CLKIN Period
(1)
Typ -- -- -- -- 32.768 -- -- -- -- -- -- -- 30.5 -- -- -- TCY -- -- -- -- -- --
Max 37 4 20 20 -- 4 20 4 -- 10,000 1,000 -- DC -- -- --
Units kHz MHz MHz MHz kHz MHz MHz MHz s ns ns ns s ns ns ns ns s ns ns ns ns ns
Conditions LP Oscillator mode XT Oscillator mode HS Oscillator mode EC Oscillator mode LP Oscillator mode XT Oscillator mode HS Oscillator mode RC Oscillator mode LP Oscillator mode XT Oscillator mode HS Oscillator mode EC Oscillator mode LP Oscillator mode XT Oscillator mode HS Oscillator mode RC Oscillator mode TCY = 4/FOSC LP oscillator XT oscillator HS oscillator LP oscillator XT oscillator HS oscillator
27 250 50 50
Oscillator Period(1)
-- 250 50 250
OS03 OS04*
TCY TOSH, TOSL TOSR, TOSF *
Instruction Cycle Time(1) External CLKIN High, External CLKIN Low External CLKIN Rise, External CLKIN Fall
200 2 100 20 0 0 0
OS05*
Note 1:
These parameters are characterized but not tested. Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values are based on characterization data for that particular oscillator type under standard operating conditions with the device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at "min" values with an external clock applied to OSC1 pin. When an external clock input is used, the "max" cycle time limit is "DC" (no clock) for all devices.
DS41288C-page 150
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 15-2: OSCILLATOR PARAMETERS
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. OS06 OS08 Sym TWARM INTOSC Characteristic Internal Oscillator Switch when running(3) Internal Calibrated INTOSC Frequency(2) Freq. Tolerance -- 1% 2% 5% Min -- 7.92 7.84 7.60 Typ -- 8.0 8.0 8.0 Max 2 8.08 8.16 8.40 Units TOSC MHz MHz MHz Conditions Slowest clock VDD = 3.5V, 25C 2.5V VDD 5.5V, 0C TA +85C 2.0V VDD 5.5V, -40C TA +85C (Ind.), -40C TA +125C (Ext.) VDD = 2.0V, -40C to +85C VDD = 3.0V, -40C to +85C VDD = 5.0V, -40C to +85C
OS10*
TIOSC ST INTOSC Oscillator Wakeup from Sleep Start-up Time *
-- -- --
5.5 3.5 3
12 7 6
24 14 11
s s s
Note 1:
2: 3:
These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values are based on characterization data for that particular oscillator type under standard operating conditions with the device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at "min" values with an external clock applied to the OSC1 pin. When an external clock input is used, the "max" cycle time limit is "DC" (no clock) for all devices. To ensure these oscillator frequency tolerances, VDD and VSS must be capacitively decoupled as close to the device as possible. 0.1 F and 0.01 F values in parallel are recommended. By design.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 151
PIC16F610/616/16HV610/616
FIGURE 15-7:
Cycle
CLKOUT AND I/O TIMING
Write Q4 Fetch Q1 Read Q2 Execute Q3
FOSC OS11 CLKOUT OS19 OS13 I/O pin (Input) OS15 I/O pin (Output) Old Value OS18, OS19 OS14 New Value OS17 OS20 OS21 OS16 OS18 OS12
TABLE 15-3:
CLKOUT AND I/O TIMING PARAMETERS
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. OS11 OS12 OS13 OS14 OS15 OS16 OS17 OS18 OS19 OS20* OS21* * Note 1: 2: Sym TOSH2CKL TOSH2CKH TCKL2IOV TIOV2CKH TOSH2IOV TOSH2IOI TIOV2OSH TIOR TIOF TINP TRAP Characteristic FOSC to CLKOUT (1) FOSC to CLKOUT (1) CLKOUT to Port out Port input valid before valid(1) CLKOUT(1) Min -- -- -- TOSC + 200 ns -- 50 20 -- -- -- -- 25 TCY Typ -- -- -- -- 50 -- -- 15 40 28 15 -- -- Max 70 72 20 -- 70* -- -- 72 32 55 30 -- -- Units ns ns ns ns ns ns ns ns ns ns ns VDD = 2.0V VDD = 5.0V VDD = 2.0V VDD = 5.0V VDD = 5.0V VDD = 5.0V Conditions VDD = 5.0V VDD = 5.0V
FOSC (Q1 cycle) to Port out valid FOSC (Q2 cycle) to Port input invalid (I/O in hold time) Port input valid to FOSC (Q2 cycle) (I/O in setup time) Port output rise time(2) Port output fall time(2) INT pin input high or low time PORTA interrupt-on-change new input level time
These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. Measurements are taken in RC mode where CLKOUT output is 4 x TOSC. Includes OSC2 in CLKOUT mode.
DS41288C-page 152
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 15-8: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP TIMER TIMING
VDD MCLR Internal POR 33 PWRT Time-out OSC Start-Up Time 32 30
Internal Reset(1) Watchdog Timer Reset(1) 34 I/O pins
Note 1: Asserted low.
31 34
FIGURE 15-9:
VDD
BROWN-OUT RESET TIMING AND CHARACTERISTICS
VBOR
VBOR + VHYST
(Device in Brown-out Reset)
(Device not in Brown-out Reset)
37
Reset (due to BOR) *
33*
64 ms delay only if PWRTE bit in the Configuration Word register is programmed to `0'.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 153
PIC16F610/616/16HV610/616
TABLE 15-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER AND BROWN-OUT RESET PARAMETERS
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. 30 31 32 33* 34* Sym TMCL TWDT TOST TPWRT TIOZ Characteristic MCLR Pulse Width (low) Watchdog Timer Time-out Period (No Prescaler) Oscillation Start-up Timer Period(1, 2) Power-up Timer Period I/O High-impedance from MCLR Low or Watchdog Timer Reset Brown-out Reset Voltage Brown-out Reset Hysteresis Brown-out Reset Minimum Detection Period Min 2 5 7 TBD -- 40 -- Typ -- -- 18 18 1024 65 -- Max -- -- 33 TBD -- 140 2.0 Units s s ms ms Conditions VDD = 5V, -40C to +85C VDD = 5V, +85C to +125C VDD = 5V, -40C to +85C VDD = 5V, +85C to +125C
TOSC (NOTE 3) ms s
35* 36* 37*
VBOR VHYST TBOR
TBD -- 100
2.1 50 --
TBD -- --
V mV s
(NOTE 4) VDD VBOR
Legend: TBD = To Be Determined * These parameters are characterized but not tested. Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values are based on characterization data for that particular oscillator type under standard operating conditions with the device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at "min" values with an external clock applied to the OSC1 pin. When an external clock input is used, the "max" cycle time limit is "DC" (no clock) for all devices. 2: By design. 3: Period of the slower clock. 4: To ensure these voltage tolerances, VDD and VSS must be capacitively decoupled as close to the device as possible. 0.1 F and 0.01 F values in parallel are recommended.
DS41288C-page 154
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
FIGURE 15-10: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI 40 41
42
T1CKI 45 47 46 49
TMR0 or TMR1
TABLE 15-5:
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. 40* 41* 42* Sym TT0H TT0L TT0P Characteristic T0CKI High Pulse Width T0CKI Low Pulse Width T0CKI Period No Prescaler With Prescaler No Prescaler With Prescaler Min 0.5 TCY + 20 10 0.5 TCY + 20 10 Greater of: 20 or TCY + 40 N 0.5 TCY + 20 15 30 0.5 TCY + 20 15 30 Greater of: 30 or TCY + 40 N 60 -- 2 TOSC Typ -- -- -- -- -- Max -- -- -- -- -- Units ns ns ns ns ns N = prescale value (2, 4, ..., 256) Conditions
45*
TT1H
T1CKI High Synchronous, No Prescaler Time Synchronous, with Prescaler Asynchronous T1CKI Low Time Synchronous, No Prescaler Synchronous, with Prescaler Asynchronous
-- -- -- -- -- -- --
-- -- -- -- -- -- --
ns ns ns ns ns ns ns N = prescale value (1, 2, 4, 8)
46*
TT1L
47*
TT1P
T1CKI Input Synchronous Period Asynchronous
-- 32.768 --
-- -- 7 TOSC
ns kHz -- Timers in Sync mode
48 49*
FT1
Timer1 Oscillator Input Frequency Range (oscillator enabled by setting bit T1OSCEN)
TCKEZTMR1 Delay from External Clock Edge to Timer Increment *
These parameters are characterized but not tested. Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 155
PIC16F610/616/16HV610/616
FIGURE 15-11: CAPTURE/COMPARE/PWM TIMINGS (ECCP)
CCP1 (Capture mode)
CC01 CC03 Note: Refer to Figure 15-5 for load conditions.
CC02
TABLE 15-6:
CAPTURE/COMPARE/PWM REQUIREMENTS (ECCP)
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. CC01* CC02* CC03* Sym TccL TccH TccP Characteristic CCP1 Input Low Time CCP1 Input High Time CCP1 Input Period No Prescaler With Prescaler No Prescaler With Prescaler Min 0.5TCY + 20 20 0.5TCY + 20 20 3TCY + 40 N Typ -- -- -- -- -- Max -- -- -- -- -- Units ns ns ns ns ns N = prescale value (1, 4 or 16) Conditions
* These parameters are characterized but not tested. Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested.
DS41288C-page 156
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 15-7: COMPARATOR SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated) Operating Temperature -40C TA +125C Param No. CM01 CM02 Sym VOS VCM Characteristics Input Offset Voltage Input Common Mode Voltage Common Mode Rejection Ratio Response Time Falling Rising CM05* TMC2COV Comparator Mode Change to Output Valid CM06* VHYS Input Hysteresis Voltage Min -- 0 +55 -- -- -- -- Typ 5.0 -- -- 150 200 -- 45 Max 10 VDD - 1.5 -- 600 1000 10 -- Units mV V dB ns ns s mV (NOTE 1) Comments (VDD - 1.5)/2
CM03* CMRR CM04* TRT
* These parameters are characterized but not tested. Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: Response time is measured with one comparator input at (VDD - 1.5)/2 - 100 mV to (VDD - 1.5)/2 + 20 mV.
TABLE 15-8:
COMPARATOR VOLTAGE REFERENCE (CVREF) SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Param No. CV01 CV02 CV03 CV04 Sym CLSB CACC CR CST Characteristics Step Size(2) Absolute Accuracy Unit Resistor Value (R) Settling Time(1) Min -- -- -- -- -- -- Typ VDD/24 VDD/32 -- -- 2k -- Max -- -- 1/2 1/2 -- 10 Units V V LSb LSb s Comments Low Range (VRR = 1) High Range (VRR = 0) Low Range (VRR = 1) High Range (VRR = 0)
Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: Settling time measured while VRR = 1 and VR<3:0> transitions from `0000' to `1111'. 2: See Section 8.11 "Comparator Voltage Reference" for more information.
TABLE 15-9:
VOLTAGE REFERENCE SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Min 0.55 1.1 -- Typ 0.6 1.200 10 Max 0.65 1.3 -- Units V V s Comments
VR Voltage Reference Specifications Param No. VR01 VR02 VR03 * Symbol VP6OUT V1P2OUT TSTABLE Characteristics VP6 voltage output V1P2 voltage output Settling Time
These parameters are characterized but not tested.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 157
PIC16F610/616/16HV610/616
TABLE 15-10: SHUNT REGULATOR SPECIFICATIONS (PIC16HV610/616 only)
SHUNT REGULATOR CHARACTERISTICS Param No. SR01 SR02 SR03* SR04 SR05 * Symbol Characteristics Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Min 4.75 4 -- 0.01 -- Typ 5 -- -- -- -- Max 5.25 50 150 10 180 Units V mA ns F A To 1% of final value Bypass capacitor on VDD pin Includes band gap reference current Comments
VSHUNT Shunt Voltage ISHUNT CLOAD ISNT Shunt Current Load Capacitance Regulator operating current TSETTLE Settling Time
These parameters are characterized but not tested.
TABLE 15-11: PIC16F616/16HV616 A/D CONVERTER (ADC) CHARACTERISTICS:
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Param Sym No. AD01 AD02 AD03 AD04 AD07 NR EIL EDL EOFF EGN Characteristic Resolution Integral Error Differential Error Offset Error Gain Error Reference Voltage(3) Min -- -- -- -- -- 2.2 2.5 VSS -- Typ -- -- -- 1.5 -- -- Max 10 bits 1 1 -- 1 -- VDD VREF 10 Units bit LSb VREF = 5.12V LSb No missing codes to 10 bits VREF = 5.12V LSb VREF = 5.12V LSb VREF = 5.12V V Absolute minimum to ensure 1 LSb accuracy V k Conditions
AD06 VREF AD06A AD07 AD08 VAIN ZAIN
Full-Scale Range Recommended Impedance of Analog Voltage Source VREF Input Current(3)
-- --
AD09* IREF
10 --
-- --
1000 50
A A
During VAIN acquisition. Based on differential of VHOLD to VAIN. During A/D conversion cycle.
* These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: Total Absolute Error includes integral, differential, offset and gain errors. 2: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes. 3: ADC VREF is from external VREF or VDD pin, whichever is selected as reference input. 4: When ADC is off, it will not consume any current other than leakage current. The power-down current specification includes any such leakage from the ADC module.
DS41288C-page 158
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TABLE 15-12: PIC16F616/16HV616 A/D CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated) Operating temperature -40C TA +125C Param No. Sym Characteristic A/D Clock Period A/D Internal RC Oscillator Period AD131 TCNV Conversion Time (not including Acquisition Time)(1) Min 1.6 3.0 3.0 1.6 -- Typ -- -- 6.0 4.0 11 Max Units 9.0 9.0 9.0 6.0 -- s s s s TAD Conditions TOSC-based, VREF 3.0V TOSC-based, VREF full range ADCS<1:0> = 11 (ADRC mode) At VDD = 2.5V At VDD = 5.0V Set GO/DONE bit to new data in A/D Result register
AD130* TAD
AD132* TACQ Acquisition Time AD133* TAMP Amplifier Settling Time AD134 TGO Q4 to A/D Clock Start -- -- --
11.5 -- TOSC/2 TOSC/2 + TCY
-- 5 -- --
s s -- -- If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the SLEEP instruction to be executed.
* These parameters are characterized but not tested. Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: ADRESH and ADRESL registers may be read on the following TCY cycle. 2: See Section 9.3 "A/D Acquisition Requirements" for minimum conditions.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 159
PIC16F610/616/16HV610/616
FIGURE 15-12: PIC16F616/16HV616 A/D CONVERSION TIMING (NORMAL MODE)
1 TCY AD131 AD130 A/D CLK A/D Data ADRES ADIF GO Sample Note 1: AD132 Sampling Stopped 9 8 OLD_DATA 7 6 3 2 1 0 NEW_DATA 1 TCY DONE BSF ADCON0, GO AD134 Q4
(TOSC/2(1))
If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the SLEEP instruction to be executed.
FIGURE 15-13:
PIC16F616/16HV616 A/D CONVERSION TIMING (SLEEP MODE)
BSF ADCON0, GO AD134 Q4 A/D CLK A/D Data ADRES ADIF GO Sample AD132 Sampling Stopped 9 8 7 6 3 2 1 0 NEW_DATA 1 TCY DONE (TOSC/2 + TCY(1)) AD131 AD130 1 TCY
OLD_DATA
Note 1:
If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the SLEEP instruction to be executed.
DS41288C-page 160
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
16.0 DC AND AC CHARACTERISTICS GRAPHS AND TABLES
Graphs are not available at this time.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 161
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 162
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
17.0
17.1
PACKAGING INFORMATION
Package Marking Information
14-Lead PDIP XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 14-Lead SOIC (.150") XXXXXXXXXXX XXXXXXXXXXX YYWWNNN 14-Lead TSSOP Example PIC16F616 -I/P e3 0610017 Example PIC16F616-E 0610017 Example
XXXXXXXX YYWW NNN
XXXX/ST 0610 017
16-Lead QFN
Example
XXXXXXX XXXXXXX YYWWNNN
Legend: XX...X Y YY WW NNN
16F616 -I/ML 0610017
Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package.
e3
*
Note:
In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.
*
Standard PIC(R) device marking consists of Microchip part number, year code, week code, and traceability code. For PIC(R) device marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. For QTP devices, any special marking adders are included in QTP price.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 163
PIC16F610/616/16HV610/616
17.2 Package Details
The following sections give the technical details of the packages.
8-Lead Plastic Dual In-Line (P or PA) - 300 mil Body [PDIP]
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
N
NOTE 1 E1
1
2 D
3 E A2
A
A1 e b1 b
L
c
eB
Units Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width Overall Row Spacing N e A A2 A1 E E1 D L c b1 b eB - .115 .015 .290 .240 .348 .115 .008 .040 .014 - MIN
INCHES NOM 8 .100 BSC - .130 - .310 .250 .365 .130 .010 .060 .018 - .210 .195 - .325 .280 .400 .150 .015 .070 .022 MAX
.430 Notes: 1. Pin 1 visual index feature may vary, but must be located with the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-018B
DS41288C-page 164
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
14-Lead Plastic Small Outline (SL or OD) - Narrow, 3.90 mm Body [SOIC]
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
D N
E E1 NOTE 1 1 2 b 3 e h h A2 c
A
A1
L L1
Units Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Overall Length Chamfer (optional) Foot Length Footprint Foot Angle Lead Thickness Lead Width Mold Draft Angle Top Mold Draft Angle Bottom N e A A2 A1 E E1 D h L L1 c b 0 0.17 0.31 5 5 0.25 0.40 - 1.25 0.10 MIN
MILLIMETERS NOM 14 1.27 BSC - - - 6.00 BSC 3.90 BSC 8.65 BSC - - 1.04 REF - - - - - 8 0.25 0.51 15 0.50 1.27 1.75 - 0.25 MAX
15 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-065B
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 165
PIC16F610/616/16HV610/616
14-Lead Plastic Thin Shrink Small Outline (ST) - 4.4 mm Body [TSSOP]
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
D N
E E1
NOTE 1 1 b A A2 c 2 e
A1
Units Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Molded Package Length Foot Length Footprint Foot Angle Lead Thickness N e A A2 A1 E E1 D L L1 c
L1
MILLIMETERS MIN NOM 14 0.65 BSC - 0.80 0.05 4.30 4.90 0.45 0 0.09 - 1.00 - 6.40 BSC 4.40 5.00 0.60 1.00 REF - - 8 0.20 4.50 5.10 0.75 1.20 1.05 0.15 MAX
L
Lead Width b 0.19 - 0.30 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-087B
DS41288C-page 166
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
16-Lead Plastic Quad Flat, No Lead Package (ML) - 4x4x0.9 mm Body [QFN]
Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
D EXPOSED PAD
D2
e E E2 2 1 b
2 1
N TOP VIEW NOTE 1
N BOTTOM VIEW L
K
A A1
A3
Units Dimension Limits Number of Pins Pitch Overall Height Standoff Contact Thickness Overall Width Exposed Pad Width Overall Length Exposed Pad Length Contact Width Contact Length Contact-to-Exposed Pad N e A A1 A3 E E2 D D2 b L K 2.50 0.25 0.30 0.20 2.50 0.80 0.00 MIN
MILLIMETERS NOM 16 0.65 BSC 0.90 0.02 0.20 REF 4.00 BSC 2.65 4.00 BSC 2.65 0.30 0.40 - 2.80 0.35 0.50 - 2.80 1.00 0.05 MAX
Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Package is saw singulated. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-127B
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 167
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 168
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
APPENDIX A:
Revision A
This is a new data sheet.
DATA SHEET REVISION HISTORY
APPENDIX B:
MIGRATING FROM OTHER PIC(R) DEVICES
This discusses some of the issues in migrating from other PIC(R) devices to the PIC16F6XX Family of devices.
Revision B (12/06)
Added PIC16F610/16HV610 parts. Replaced Package Drawings.
Revision C (03/2007)
Replaced Package Drawings (Rev. AM); Replaced Development Support Section; Revised Product ID System.
B.1
PIC16F676 to PIC16F610/616/16HV610/616
FEATURE COMPARISON
Feature PIC16F676 20 MHz 1024 64 10-bit 1/1 8 Y RA0/1/2/4/5 RA0/1/2/3/4/5 1 N 4 MHz N PIC16F610/16HV610 20 MHz 1024 64 None 1/1 8 Y RA0/1/2/4/5, MCLR RA0/1/2/3/4/5 2 N 8 MHz Y (PIC16HV610) PIC16F616/16HV616 20 MHz 2048 128 10-bit 2/1 8 Y RA0/1/2/4/5, MCLR RA0/1/2/3/4/5 2 Y 8 MHz Y (PIC16HV616)
TABLE B-1:
Max Operating Speed Max Program Memory (Words) SRAM (bytes) A/D Resolution Timers (8/16-bit) Oscillator Modes Brown-out Reset Internal Pull-ups Interrupt-on-change Comparator ECCP INTOSC Frequencies Internal Shunt Regulator Note:
This device has been designed to perform to the parameters of its data sheet. It has been tested to an electrical specification designed to determine its conformance with these parameters. Due to process differences in the manufacture of this device, this device may have different performance characteristics than its earlier version. These differences may cause this device to perform differently in your application than the earlier version of this device.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 169
PIC16F610/616/16HV610/616
NOTES:
DS41288C-page 170
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
INDEX
A
A/D Specifications.................................................... 158, 159 Absolute Maximum Ratings .............................................. 139 AC Characteristics Industrial and Extended ............................................ 150 Load Conditions ........................................................ 149 ADC .................................................................................... 71 Acquisition Requirements ........................................... 79 Associated registers.................................................... 81 Block Diagram............................................................. 71 Calculating Acquisition Time....................................... 79 Channel Selection....................................................... 72 Configuration............................................................... 72 Configuring Interrupt ................................................... 74 Conversion Clock........................................................ 72 Conversion Procedure ................................................ 74 Internal Sampling Switch (RSS) Impedance................ 79 Interrupts..................................................................... 73 Operation .................................................................... 74 Operation During Sleep .............................................. 74 Port Configuration ....................................................... 72 Reference Voltage (VREF)........................................... 72 Result Formatting........................................................ 73 Source Impedance...................................................... 79 Special Event Trigger.................................................. 74 Starting an A/D Conversion ........................................ 73 ADCON0 Register............................................................... 76 ADCON1 Register............................................................... 77 ADRESH Register (ADFM = 0) ........................................... 78 ADRESH Register (ADFM = 1) ........................................... 78 ADRESL Register (ADFM = 0)............................................ 78 ADRESL Register (ADFM = 1)............................................ 78 Analog-to-Digital Converter. See ADC ANSEL Register .................................................................. 32 Assembler MPASM Assembler................................................... 136 RC2 and RC3 Pins ..................................................... 41 RC4 Pin ...................................................................... 42 RC5 Pin ...................................................................... 42 Resonator Operation .................................................. 27 Timer1 ........................................................................ 47 Timer2 ........................................................................ 53 TMR0/WDT Prescaler ................................................ 43 Watchdog Timer ....................................................... 119 Brown-out Reset (BOR).................................................... 110 Associated Registers................................................ 111 Specifications ........................................................... 154 Timing and Characteristics ....................................... 153
C
C Compilers MPLAB C18.............................................................. 136 MPLAB C30.............................................................. 136 Calibration Bits.................................................................. 108 Capture Module. See Enhanced Capture/ Compare/PWM (ECCP) Capture/Compare/PWM (CCP) Associated registers w/ Capture/Compare/ PWM..................................................... 85, 87, 103 Capture Mode............................................................. 84 CCP1 Pin Configuration ............................................. 84 Compare Mode........................................................... 86 CCP1 Pin Configuration ..................................... 86 Software Interrupt Mode ............................... 84, 86 Special Event Trigger ......................................... 86 Timer1 Mode Selection................................. 84, 86 Prescaler .................................................................... 84 PWM Mode................................................................. 88 Duty Cycle .......................................................... 89 Effects of Reset .................................................. 90 Example PWM Frequencies and Resolutions, 20 MHz .................................. 89 Example PWM Frequencies and Resolutions, 8 MHz .................................... 89 Operation in Sleep Mode.................................... 90 Setup for Operation ............................................ 90 System Clock Frequency Changes .................... 90 PWM Period ............................................................... 89 Setup for PWM Operation .......................................... 90 CCP1CON (Enhanced) Register ........................................ 83 Clock Sources External Modes........................................................... 26 EC ...................................................................... 26 HS ...................................................................... 27 LP ....................................................................... 27 OST .................................................................... 26 RC ...................................................................... 28 XT ....................................................................... 27 Internal Modes............................................................ 28 INTOSC .............................................................. 28 INTOSCIO .......................................................... 28 CM1CON0 Register............................................................ 60 CM2CON0 Register............................................................ 61 CM2CON1 Register............................................................ 63 Code Examples A/D Conversion .......................................................... 75 Assigning Prescaler to Timer0.................................... 44 Assigning Prescaler to WDT....................................... 44 Changing Between Capture Prescalers ..................... 84 Indirect Addressing..................................................... 22
B
Block Diagrams (CCP) Capture Mode Operation ................................. 84 ADC ............................................................................ 71 ADC Transfer Function ............................................... 80 Analog Input Model ............................................... 62, 80 CCP PWM................................................................... 88 Clock Source............................................................... 25 Comparator C1 ........................................................... 56 Comparator C2 ........................................................... 56 Compare ..................................................................... 86 Crystal Operation ........................................................ 27 External RC Mode....................................................... 28 In-Circuit Serial Programming Connections.............. 123 Interrupt Logic ........................................................... 116 MCLR Circuit............................................................. 109 On-Chip Reset Circuit ............................................... 108 PIC16F610/16HV610.................................................... 7 PIC16F616/16HV616.................................................... 8 PWM (Enhanced)........................................................ 91 RA0 and RA1 Pins ...................................................... 34 RA2 Pins ..................................................................... 35 RA3 Pin....................................................................... 36 RA4 Pin....................................................................... 37 RA5 Pin....................................................................... 38 RC0 and RC1 Pins...................................................... 41
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 171
PIC16F610/616/16HV610/616
Initializing PORTA ....................................................... 31 Initializing PORTC....................................................... 40 Saving Status and W Registers in RAM ................... 118 Code Protection ................................................................ 122 Comparator C2OUT as T1 Gate ..................................................... 63 Operation .................................................................... 55 Operation During Sleep .............................................. 59 Response Time ........................................................... 57 Synchronizing COUT w/Timer1 .................................. 63 Comparator Analog Input Connection Considerations........ 62 Comparator Hysteresis ....................................................... 64 Comparator Module ............................................................ 55 Associated registers.................................................... 65 C1 Output State Versus Input Conditions ................... 57 Comparator Voltage Reference (CVREF) Response Time ........................................................... 57 Comparator Voltage Reference (CVREF) ............................ 68 Effects of a Reset........................................................ 59 Specifications ............................................................ 157 Comparators C2OUT as T1 Gate ..................................................... 48 Effects of a Reset........................................................ 59 Specifications ............................................................ 157 Compare Module. See Enhanced Capture/ Compare/PWM (ECCP) CONFIG Register.............................................................. 107 Configuration Bits.............................................................. 106 CPU Features ................................................................... 106 Customer Change Notification Service ............................. 175 Customer Notification Service........................................... 175 Customer Support ............................................................. 175 Errata .................................................................................... 6
F
Firmware Instructions ....................................................... 125 Fuses. See Configuration Bits
G
General Purpose Register File ........................................... 12
I
ID Locations...................................................................... 122 In-Circuit Debugger........................................................... 123 In-Circuit Serial Programming (ICSP)............................... 123 Indirect Addressing, INDF and FSR registers..................... 22 Instruction Format............................................................. 125 Instruction Set................................................................... 125 ADDLW..................................................................... 127 ADDWF..................................................................... 127 ANDLW..................................................................... 127 ANDWF..................................................................... 127 BCF .......................................................................... 127 BSF........................................................................... 127 BTFSC ...................................................................... 127 BTFSS ...................................................................... 128 CALL......................................................................... 128 CLRF ........................................................................ 128 CLRW ....................................................................... 128 CLRWDT .................................................................. 128 COMF ....................................................................... 128 DECF ........................................................................ 128 DECFSZ ................................................................... 129 GOTO ....................................................................... 129 INCF ......................................................................... 129 INCFSZ..................................................................... 129 IORLW ...................................................................... 129 IORWF...................................................................... 129 MOVF ....................................................................... 130 MOVLW .................................................................... 130 MOVWF .................................................................... 130 NOP .......................................................................... 130 RETFIE ..................................................................... 131 RETLW ..................................................................... 131 RETURN................................................................... 131 RLF ........................................................................... 132 RRF .......................................................................... 132 SLEEP ...................................................................... 132 SUBLW ..................................................................... 132 SUBWF..................................................................... 133 SWAPF ..................................................................... 133 XORLW .................................................................... 133 XORWF .................................................................... 133 Summary Table ........................................................ 126 INTCON Register................................................................ 18 Internal Oscillator Block INTOSC Specifications ........................................... 151, 152 Internal Sampling Switch (RSS) Impedance........................ 79 Internet Address ............................................................... 175 Interrupts........................................................................... 115 ADC ............................................................................ 74 Associated Registers ................................................ 117 Context Saving ......................................................... 118 Interrupt-on-Change ................................................... 32 PORTA Interrupt-on-Change .................................... 116 RA2/INT .................................................................... 115 Timer0 ...................................................................... 116
D
Data Memory....................................................................... 12 DC Characteristics Extended and Industrial ............................................ 146 Industrial and Extended ............................................ 142 Development Support ....................................................... 135 Device Overview ................................................................... 7
E
ECCP. See Enhanced Capture/Compare/PWM ECCPAS Register ............................................................. 100 Effects of Reset PWM mode ................................................................. 90 Electrical Specifications .................................................... 139 Enhanced Capture/Compare/PWM..................................... 83 Enhanced Capture/Compare/PWM (ECCP) Enhanced PWM Mode ................................................ 91 Auto-Restart...................................................... 101 Auto-shutdown .................................................. 100 Direction Change in Full-Bridge Output Mode .... 97 Full-Bridge Application ........................................ 95 Full-Bridge Mode................................................. 95 Half-Bridge Application ....................................... 94 Half-Bridge Application Examples..................... 102 Half-Bridge Mode ................................................ 94 Output Relationships (Active-High and Active-Low) ................................................. 92 Output Relationships Diagram ............................ 93 Programmable Dead Band Delay ..................... 102 Shoot-through Current ...................................... 102 Start-up Considerations ...................................... 99 Specifications ............................................................ 156 Timer Resources......................................................... 83
DS41288C-page 172
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
TMR1 .......................................................................... 49 INTOSC Specifications ............................................. 151, 152 IOCA Register ..................................................................... 33 ANSEL Register ................................................. 32 Interrupt-on-Change ........................................... 32 Weak Pull-Ups.................................................... 32 Associated registers ................................................... 39 Pin Descriptions and Diagrams .................................. 34 RA0............................................................................. 34 RA1............................................................................. 34 RA2............................................................................. 35 RA3............................................................................. 36 RA4............................................................................. 37 RA5............................................................................. 38 Specifications ........................................................... 152 PORTA Register ................................................................. 31 PORTC ............................................................................... 40 Associated registers ................................................... 42 P1A/P1B/P1C/P1D.See Enhanced Capture/ Compare/PWM (ECCP)...................................... 40 Specifications ........................................................... 152 PORTC Register................................................................. 40 Power-Down Mode (Sleep)............................................... 121 Power-on Reset (POR)..................................................... 109 Power-up Timer (PWRT) .................................................. 109 Specifications ........................................................... 154 Precision Internal Oscillator Parameters .......................... 152 Prescaler Shared WDT/Timer0................................................... 44 Switching Prescaler Assignment ................................ 44 Program Memory ................................................................ 11 Map and Stack (PIC16F610/16HV610) ...................... 11 Map and Stack (PIC16F616/16HV616) ...................... 11 Programming, Device Instructions.................................... 125 PWM Mode. See Enhanced Capture/Compare/PWM ........ 91 PWM1CON Register......................................................... 103
L
Load Conditions ................................................................ 149
M
MCLR ................................................................................ 109 Internal ...................................................................... 109 Memory Organization.......................................................... 11 Data ............................................................................ 12 Program ...................................................................... 11 Microchip Internet Web Site .............................................. 175 Migrating from other PIC Devices ..................................... 169 MPLAB ASM30 Assembler, Linker, Librarian ................... 136 MPLAB ICD 2 In-Circuit Debugger ................................... 137 MPLAB ICE 2000 High-Performance Universal In-Circuit Emulator .................................................... 137 MPLAB Integrated Development Environment Software .. 135 MPLAB PM3 Device Programmer .................................... 137 MPLAB REAL ICE In-Circuit Emulator System................. 137 MPLINK Object Linker/MPLIB Object Librarian ................ 136
O
OPCODE Field Descriptions ............................................. 125 Operational Amplifier (OPA) Module AC Specifications...................................................... 158 OPTION Register .......................................................... 17, 45 Oscillator Associated registers.............................................. 29, 51 Oscillator Module ................................................................ 25 EC ............................................................................... 25 HS ............................................................................... 25 INTOSC ...................................................................... 25 INTOSCIO................................................................... 25 LP................................................................................ 25 RC............................................................................... 25 RCIO ........................................................................... 25 XT ............................................................................... 25 Oscillator Parameters ....................................................... 151 Oscillator Specifications .................................................... 150 Oscillator Start-up Timer (OST) Specifications............................................................ 154 OSCTUNE Register ............................................................ 29
R
Reader Response............................................................. 176 Read-Modify-Write Operations ......................................... 125 Registers ADCON0 (ADC Control 0) .......................................... 76 ADCON1 (ADC Control 1) .......................................... 77 ADRESH (ADC Result High) with ADFM = 0) ............ 78 ADRESH (ADC Result High) with ADFM = 1) ............ 78 ADRESL (ADC Result Low) with ADFM = 0).............. 78 ADRESL (ADC Result Low) with ADFM = 1).............. 78 ANSEL (Analog Select) .............................................. 32 CCP1CON (Enhanced CCP1 Control) ....................... 83 CM1CON0 (C1 Control) ............................................. 60 CM2CON0 (C2 Control) ............................................. 61 CM2CON1 (C2 Control) ............................................. 63 CONFIG (Configuration Word) ................................. 107 Data Memory Map (PIC16F610/16HV610) ................ 13 Data Memory Map (PIC16F616/16HV616) ................ 13 ECCPAS (Enhanced CCP Auto-shutdown Control) . 100 INTCON (Interrupt Control) ........................................ 18 IOCA (Interrupt-on-Change PORTA).......................... 33 OPTION_REG (OPTION)..................................... 17, 45 OSCTUNE (Oscillator Tuning).................................... 29 PCON (Power Control Register)................................. 21 PCON (Power Control) ............................................. 111 PIE1 (Peripheral Interrupt Enable 1) .......................... 19 PIR1 (Peripheral Interrupt Register 1) ........................ 20 PORTA ....................................................................... 31 PORTC ....................................................................... 40 PWM1CON (Enhanced PWM Control) ..................... 103 Reset Values ............................................................ 113 Reset Values (special registers)............................... 114
P
P1A/P1B/P1C/P1D.See Enhanced Capture/ Compare/PWM (ECCP) .............................................. 91 Packaging ......................................................................... 163 Marking ..................................................................... 163 PDIP Details.............................................................. 164 PCL and PCLATH ............................................................... 22 Stack ........................................................................... 22 PCON Register ........................................................... 21, 111 PICSTART Plus Development Programmer ..................... 138 PIE1 Register ...................................................................... 19 Pin Diagram PDIP, SOIC, TSSOP................................................. 2, 3 QFN .......................................................................... 4, 5 Pinout Descriptions PIC16F610/16HV610.................................................... 9 PIC16F616/16HV616.................................................. 10 PIR1 Register...................................................................... 20 PORTA................................................................................ 31 Additional Pin Functions ............................................. 32
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 173
PIC16F610/616/16HV610/616
Special Function Registers ......................................... 12 Special Register Summary ......................................... 15 SRCON0 (SR Latch Control 0) ................................... 67 SRCON1 (SR Latch Control 1) ................................... 67 STATUS ...................................................................... 16 T1CON ........................................................................ 50 T2CON ........................................................................ 54 TRISA (Tri-State PORTA) ........................................... 31 TRISC (Tri-State PORTC) .......................................... 40 VRCON (Voltage Reference Control) ......................... 70 WPUA (Weak Pull Up PORTA)................................... 33 Reset................................................................................. 108 Revision History ................................................................ 169 A/D Conversion (Sleep Mode) .................................. 160 Brown-out Reset (BOR)............................................ 153 Brown-out Reset Situations ...................................... 110 CLKOUT and I/O ...................................................... 152 Clock Timing ............................................................. 150 Comparator Output ..................................................... 55 Enhanced Capture/Compare/PWM (ECCP)............. 156 Full-Bridge PWM Output............................................. 96 Half-Bridge PWM Output .................................... 94, 102 INT Pin Interrupt ....................................................... 117 PWM Auto-shutdown Auto-restart Enabled......................................... 101 Firmware Restart .............................................. 101 PWM Direction Change .............................................. 97 PWM Direction Change at Near 100% Duty Cycle..... 98 PWM Output (Active-High) ......................................... 92 PWM Output (Active-Low) .......................................... 93 Reset, WDT, OST and Power-up Timer ................... 153 Time-out Sequence Case 1 .............................................................. 112 Case 2 .............................................................. 112 Case 3 .............................................................. 112 Timer0 and Timer1 External Clock ........................... 155 Timer1 Incrementing Edge ......................................... 49 Wake-up from Interrupt............................................. 122 Timing Parameter Symbology .......................................... 149 TRISA ................................................................................. 31 TRISA Register................................................................... 31 TRISC ................................................................................. 40 TRISC Register................................................................... 40
S
Shoot-through Current ...................................................... 102 Sleep Power-Down Mode ................................................... 121 Wake-up.................................................................... 121 Wake-up using Interrupts .......................................... 121 Software Simulator (MPLAB SIM)..................................... 136 Special Event Trigger.......................................................... 74 Special Function Registers ................................................. 12 SRCON0 Register............................................................... 67 SRCON1 Register............................................................... 67 STATUS Register................................................................ 16
T
T1CON Register.................................................................. 50 T2CON Register.................................................................. 54 Thermal Considerations .................................................... 148 Time-out Sequence........................................................... 111 Timer0 ................................................................................. 43 Associated Registers .................................................. 45 External Clock ............................................................. 44 Interrupt....................................................................... 45 Operation .................................................................... 43 Specifications ............................................................ 155 T0CKI .......................................................................... 44 Timer1 ................................................................................. 47 Associated registers.................................................... 51 Asynchronous Counter Mode ..................................... 48 Reading and Writing ........................................... 48 Interrupt....................................................................... 49 Modes of Operation .................................................... 47 Operation .................................................................... 47 Operation During Sleep .............................................. 49 Oscillator ..................................................................... 48 Prescaler ..................................................................... 48 Specifications ............................................................ 155 Timer1 Gate Inverting Gate ..................................................... 48 Selecting Source........................................... 48, 63 SR Latch ............................................................. 66 Synchronizing COUT w/Timer1 .......................... 63 TMR1H Register ......................................................... 47 TMR1L Register .......................................................... 47 Timer2 Associated registers.................................................... 54 Timers Timer1 T1CON................................................................ 50 Timer2 T2CON................................................................ 54 Timing Diagrams A/D Conversion ......................................................... 160
V
Voltage Reference (VR) Specifications ........................................................... 157 Voltage Reference. See Comparator Voltage Reference (CVREF) Voltage References Associated registers ................................................... 65 VP6 Stabilization ........................................................ 69 VREF. SEE ADC Reference Voltage
W
Wake-up Using Interrupts ................................................. 121 Watchdog Timer (WDT).................................................... 119 Associated registers ................................................. 120 Specifications ........................................................... 154 WPUA Register................................................................... 33 WWW Address ................................................................. 175 WWW, On-Line Support ....................................................... 6
DS41288C-page 174
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
THE MICROCHIP WEB SITE
Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information: * Product Support - Data sheets and errata, application notes and sample programs, design resources, user's guides and hardware support documents, latest software releases and archived software * General Technical Support - Frequently Asked Questions (FAQ), technical support requests, online discussion groups, Microchip consultant program member listing * Business of Microchip - Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels: * * * * * Distributor or Representative Local Sales Office Field Application Engineer (FAE) Technical Support Development Systems Information Line
Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document. Technical support is available through the web site at: http://support.microchip.com
CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip's customer notification service helps keep customers current on Microchip products. Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions.
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 175
PIC16F610/616/16HV610/616
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150. Please list the following information, and use this outline to provide us with your comments about this document. To: RE: Technical Publications Manager Reader Response Total Pages Sent ________
From: Name Company Address City / State / ZIP / Country Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y N Literature Number: DS41288C FAX: (______) _________ - _________
Device: PIC16F610/616/16HV610/616 Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS41288C-page 176
Preliminary
(c) 2007 Microchip Technology Inc.
PIC16F610/616/16HV610/616
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. Device X Temperature Range /XX Package XXX Pattern Examples:
a) PIC16F610/616/16HV610/616-E/P 301 = Extended Temp., PDIP package, 20 MHz, QTP pattern #301 PIC16F610/616/16HV610/616-I/SL = Industrial Temp., SOIC package, 20 MHz
b) Device: PIC16F610/616/16HV610/616, PIC16F610/616/16HV610/ 616T(1)
Temperature Range:
I E
= -40C to +85C = -40C to +125C
(Industrial) (Extended)
Package:
ML P SL ST
= = = =
Quad Flat No Leads (QFN) Plastic DIP 14-lead Small Outline (3.90 mm) Thin Shrink Small Outline (4.4 mm) Note 1: T = in tape and reel TSSOP and SOIC packages only.
Pattern:
QTP, SQTP or ROM Code; Special Requirements (blank otherwise)
(c) 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 177
WORLDWIDE SALES AND SERVICE
AMERICAS
Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Kokomo Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509
ASIA/PACIFIC
Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Habour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8528-2100 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 China - Fuzhou Tel: 86-591-8750-3506 Fax: 86-591-8750-3521 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 China - Shunde Tel: 86-757-2839-5507 Fax: 86-757-2839-5571 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 China - Xian Tel: 86-29-8833-7250 Fax: 86-29-8833-7256
ASIA/PACIFIC
India - Bangalore Tel: 91-80-4182-8400 Fax: 91-80-4182-8422 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea - Gumi Tel: 82-54-473-4301 Fax: 82-54-473-4302 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Malaysia - Penang Tel: 60-4-646-8870 Fax: 60-4-646-5086 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-572-9526 Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350
EUROPE
Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820
12/08/06
DS41288C-page 178
Preliminary
(c) 2007 Microchip Technology Inc.

▲Up To Search▲

Price & Availability of PIC16HV610T-IST

	To Download PIC16HV610T-IST Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .