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| INTEGRATED CIRCUITS 83C752/87C752 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count Product specification Supersedes data of 1998 Jan 19 IC20 Data Handbook 1998 May 01 Philips Semiconductors Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 DESCRIPTION The Philips 83C752/87C752 offers many of the advantages of the 80C51 architecture in a small package and at low cost. The 8XC752 Microcontroller is fabricated with Philips high-density CMOS technology. Philips epitaxial substrate minimizes CMOS latch-up sensitivity. The 8XC752 contains a 2k x 8 ROM (83C752) EPROM (87C752), a 64 x 8 RAM, 21 I/O lines, a 16-bit auto-reload counter/timer, a fixed-priority level interrupt structure, a bidirectional inter-integrated circuit (I2C) serial bus interface, an on-chip oscillator, a five channel multiplexed 8-bit A/D converter, and an 8-bit PWM output. The onboard inter-integrated circuit (I2C) bus interface allows the 8XC752 to operate as a master or slave device on the I2C small area network. This capability facilitates I/O and RAM expansion, access to EEPROM, processor-to-processor communication, and efficient interface to a wide variety of dedicated I2C peripherals. The EPROM version of this device, the 87C752, is available in both quartz-lid erasable and plastic one-time programmable (OTP) packages. Once the array has been programmed, it is functionally equivalent to the masked ROM 83C752. Thus, unless explicitly stated otherwise, all references made to the 83C752 apply equally to the 87C752. The 83C752 supports two power reduction modes of operation referred to as the idle mode and the power-down mode. * Small package sizes - 28-pin DIP - 28-pin PLCC - 28-pin SSOP * Wide oscillator frequency range * Low power consumption: - Normal operation: less than 11mA @ 5V, 12MHz - Idle mode - Power-down mode * 2k x 8 ROM (83C752) EPROM (87C752) * 64 x 8 RAM * 16-bit auto reloadable counter/timer * 5-channel 8-bit A/D converter * 8-bit PWM output/timer * Fixed-rate timer * Boolean processor * CMOS and TTL compatible * Well suited for logic replacement, consumer and industrial applications FEATURES packages * Available in erasable quartz lid or One-Time Programmable plastic * 80C51 based architecture * Inter-integrated Circuit (I2C) serial bus interface PART NUMBER SELECTION ROM S83C752-1DB S83C752-1N28 S83C752-2N28 S83C752-4DB S83C752-4N28 S83C752-5N28 S83C752-1A28 S83C752-2A28 S83C752-4A28 S83C752-5A28 S83C752-6A28 EPROM S87C752-1DB S87C752-1N28 S87C752-2N28 S87C752-4DB S87C752-4N28 S87C752-5N28 S87C752-1A28 S87C752-2A28 S87C752-4A28 S87C752-5A28 S87C752-6A28 OTP OTP OTP OTP OTP OTP OTP OTP OTP OTP OTP TEMPERATURE RANGE C AND PACKAGE 0 to +70, 28-pin Plastic Shrink Small Outline Package 0 to +70, 28-pin Plastic Dual In-line Package -40 to +85, 28-pin Plastic Dual In-line Package 0 to +70, 28-pin Plastic Shrink Small Outline Package 0 to +70, 28-pin Plastic Dual In-line Package -40 to +85, 28-pin Plastic Dual In-line Package 0 to +70, 28-pin Plastic Leaded Chip Carrier -40 to +85, 28-pin Plastic Leaded Chip Carrier 0 to +70, 28-pin Plastic Leaded Chip Carrier -40 to +85, 28-pin Plastic Leaded Chip Carrier -55 to +125, 28-pin Plastic Leaded Chip Carrier -55 to +125, 28-pin Plastic Dual In-line Package FREQUENCY 3.5 to 12MHz 3.5 to 12MHz 3.5 to 12MHz 3.5 to 16MHz 3.5 to 16MHz 3.5 to 16MHz 3.5 to 12MHz 3.5 to 12MHz 3.5 to 16MHz 3.5 to 16MHz 3.5 to 12MHz 3.5 to 12MHz DRAWING NUMBER SOT341-1 SOT117-2 SOT117-2 SOT341-1 SOT117-2 SOT117-2 SOT261-3 SOT261-3 SOT261-3 SOT261-3 SOT261-3 SOT117-2 S83C752-6N28 S87C752-6N28 OTP NOTE: 1. OTP = One Time Programmable EPROM. 1998 May 01 2 853-1443 19328 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 BLOCK DIAGRAM P0.0-P0.4 PORT 0 DRIVERS VCC VSS RAM ADDR REGISTER RAM PORT 0 LATCH PORT 2 LATCH ROM/ EPROM I2C CONTROL PWM B REGISTER ACC STACK POINTER PROGRAM ADDRESS REGISTER TMP2 TMP1 ALU PCON I2DAT I2CFG I2STA I2CON TH0 RTH IE TL0 RTL TCON BUFFER PSW INTERRUPT, SERIAL PORT AND TIMER BLOCKS PC INCREMENTER PROGRAM COUNTER INSTRUCTION REGISTER RST TIMING AND CONTROL DPTR PD PORT 1 LATCH PORT 3 LATCH OSCILLATOR ADC X1 X2 PORT 1 DRIVERS PORT 3 DRIVERS AVSS AVCC P1.0-P1.7 P3.0-P3.7 SU00319 1998 May 01 3 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 PIN CONFIGURATIONS P3.4/A4 1 P3.3/A3 2 P3.2/A2/A10 3 P3.1/A1/A9 4 P3.0/A0/A8 5 P0.2/VPP P0.1/SDA/OE-PGM P0.0/SCL/ASEL RST 6 7 8 9 PLASTIC DUAL IN-LINE PACKAGE AND SHRINK SMALL OUTLINE PACKAGE 28 VCC 27 P3.5/A5 26 P3.6/A6 25 P3.7/A7 24 P0.4/PWM OUT 23 P0.3 22 P1.7/T0/D7 21 P1.6/INT1/D6 20 P1.5/INT0/D5 19 AVCC 18 AVSS 17 P1.4/ADC4/D4 16 P1.3/ADC3/D3 15 P1.2/ADC2/D2 X2 10 X1 11 VSS 12 P1.0/ADC0/D0 13 P1.1/ADC1/D1 14 4 5 1 26 25 PLASTIC LEADED CHIP CARRIER 11 12 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Function P3.4/A4 P3.3/A3 P3.2/A2/A10 P3.1/A1/A9 P3.0/A0/A8 P0.2/VPP P0.1/SDA/OE-PGM P0.0/SCL/ASEL RST X2 X1 VSS P1.0/ADC0/D0 P1.1/ADC1/D1 Pin 15 16 17 18 19 20 21 22 23 24 25 26 27 28 18 Function P1.2/ADC2/D2 P1.3/ADC3/D3 P1.4/ADC4/D4 AVSS AVCC P1.5/INT0/D5 P1.6/INT1/D6 P1.7/T0/D7 P0.3 P0.4/PWM OUT P3.7/A7 P3.6/A6 P3.5/A5 VCC 19 SU00318 1998 May 01 4 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 PIN DESCRIPTION MNEMONIC VSS VCC P0.0-P0.4 PIN NO. 12 28 8-6 23, 24 TYPE I I I/O Circuit Ground Potential. Supply voltage during normal, idle, and power-down operation. Port 0: Port 0 is a 5-bit bidirectional port. Port 0.0-P0.2 are open drain. Port 0.0-P0.2 pins that have 1s written to them float, and in that state can be used as high-impedance inputs. P0.3-P0.4 are bidirectional I/O port pins with internal pull-ups. Port 0 also serves as the serial I2C interface. When this feature is activated by software, SCL and SDA are driven low in accordance with the I2C protocol. These pins are driven low if the port register bit is written with a 0 or if the I2C subsystem presents a 0. The state of the pin can always be read from the port register by the program. Port 0.3 and 0.4 have internal pull-ups that function identically to port 3. Pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. To comply with the I2C specification, P0.0 and P0.1 are open drain bidirectional I/O pins with the electrical characteristics listed in the tables that follow. While these differ from "standard TTL" characteristics, they are close enough for the pins to still be used as general-purpose I/O in non-I2C applications. VPP (P0.2) - Programming voltage input. (See Note 2.) OE/PGM (P0.1) - Input which specifies verify mode (output enable) or the program mode. OE/PGM = 1 output enabled (verify mode). OE/PGM = 0 program mode. ASEL (P0.0) - Input which indicates which bits of the EPROM address are applied to port 3. ASEL = 0 low address byte available on port 3. ASEL = 1 high address byte available on port 3 (only the three least significant bits are used). Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. P0.3-P0.4 pins are bidirectional I/O port pins with internal pull-ups. As inputs, port 1 pins that are externally pulled low will source current because of the internal pull-ups. (See DC Electrical Characteristics: IIL). Port 1 also serves the special function features of the SC80C51 family as listed below: INT0 (P1.5): External interrupt. INT1 (P1.6): External interrupt. T0 (P1.7): Timer 0 external input. ADC0 (P1.0)-ADC4 (P1.4): Port 1 also functions as the inputs to the five channel multiplexed A/D converter. These pins can be used as outputs only if the A/D function has been disabled. These pins can be used as inputs while the A/D converter is enabled. Port 1 serves to output the addressed EPROM contents in the verify mode and accepts as inputs the value to program into the selected address during the program mode. P3.0-P3.7 5-1, 27-25 I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 3 pins that are externally being pulled low will source current because of the pull-ups. (See DC Electrical Characteristics: IIL). Port 3 also functions as the address input for the EPROM memory location to be programmed (or verified). The 11-bit address is multiplexed into this port as specified by P0.0/ASEL. Reset: A high on this pin for two machine cycles while the oscillator is running resets the device. An internal diffused resistor to VSS permits a power-on RESET using only an external capacitor to VCC. After the device is reset, a 10-bit serial sequence, sent LSB first, applied to RESET, places the device in the programming state allowing programming address, data and VPP to be applied for programming or verification purposes. The RESET serial sequence must be synchronized with the X1 input. Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock generator circuits. X1 also serves as the clock to strobe in a serial bit stream into RESET to place the device in the programming state. Crystal 2: Output from the inverting oscillator amplifier. Analog supply voltage and reference input. Analog supply and reference ground. NAME AND FUNCTION 6 7 I I 8 I P1.0-P1.7 13-17, 20-22 I/O 20 21 22 13-17 I I I I RST 9 I X1 11 I X2 AVCC AVSS 1 1 10 19 18 O I I NOTE: 1. AVSS (reference ground) must be connected to 0V (ground). AVCC (reference input) cannot differ from VCC by more than 0.2V, and must be in the range 4.5V to 5.5V. 2. When P0.2 is at or close to 0V, it may affect the internal ROM operation. We recommend that P0.2 be tied to VCC via a small pull-up (e.g., 2k). 1998 May 01 5 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 OSCILLATOR CHARACTERISTICS X1 and X2 are the input and output, respectively, of an inverting amplifier which can be configured for use as an on-chip oscillator. To drive the device from an external clock source, X1 should be driven while X2 is left unconnected. There are no requirements on the duty cycle of the external clock signal, because the input to the internal clock circuitry is through a divide-by-two flip-flop. However, minimum and maximum high and low times specified in the data sheet must be observed. DIFFERENCES BETWEEN THE 8XC752 AND THE 80C51 Program Memory On the 8XC752, program memory is 2048 bytes long and is not externally expandable, so the 80C51 instructions MOVX, LJMP, and LCALL are not implemented. If these instructions are executed, the appropriate number of instruction cycles will take place along with external fetches; however, no operation will take place. The LJMP may not respond to all program address bits. The only fixed locations in program memory are the addresses at which execution is taken up in response to reset and interrupts, which are as follows: Program Memory Event Address Reset 000 003 External INT0 Counter/timer 0 00B External INT1 013 Timer I 01B 023 I2C serial ADC 02B PWM 033 IDLE MODE The 8XC752 includes the 80C51 power-down and idle mode features. In idle mode, the CPU puts itself to sleep while all of the on-chip peripherals except the A/D and PWM stay active. The functions that continue to run while in the idle mode are Timer 0, the I2C interface including Timer I, and the interrupts. The instruction to invoke the idle mode is the last instruction executed in the normal operating mode before the idle mode is activated. The CPU contents, the on-chip RAM, and all of the special function registers remain intact during this mode. The idle mode can be terminated either by any enabled interrupt (at which time the process is picked up at the interrupt service routine and continued), or by a hardware reset which starts the processor in the same manner as a power-on reset. Upon powering-up the circuit, or exiting from idle mode, sufficient time must be allowed for stabilization of the internal analog reference voltages before an A/D conversion is started. Memory Organization The 8XC752 manipulates operands in three memory address spaces. The first is the program memory space which contains program instructions as well as constants such as look-up tables. The program memory space contains 2k bytes in the 8XC752. The second memory space is the data memory array which has a logical address space of 128 bytes. However, only the first 64 (0 to 3FH) are implemented in the 8XC752. The third memory space is the special function register array having a 128-byte address space (80H to FFH). Only selected locations in this memory space are used (see Table 2). Note that the architecture of these memory spaces (internal program memory, internal data memory, and special function registers) is identical to the 80C51, and the 8XC752 varies only in the amount of memory physically implemented. The 8XC752 does not directly address any external data or program memory spaces. For this reason, the MOVX instructions in the 80C51 instruction set are not implemented in the 83C752, nor are the alternate I/O pin functions RD and WR. Special Function Registers The special function registers (directly addressable only) contain all of the 8XC751 registers except the program counter and the four register banks. Most of the 21 special function registers are used to control the on-chip peripheral hardware. Other registers include arithmetic registers (ACC, B, PSW), stack pointer (SP) and data pointer registers (DPH, DPL). Nine of the SFRs are bit addressable. Data Pointer The data pointer (DPTR) consists of a high byte (DPH) and a low byte (DPL). In the 80C51 this register allows the access of external data memory using the MOVX instruction. Since the 83C752 does not support MOVX or external memory accesses, this register is generally used as a 16-bit offset pointer of the accumulator in a MOVC instruction. DPTR may also be manipulated as two independent 8-bit registers. POWER-DOWN MODE In the power-down mode, the oscillator is stopped and the instruction to invoke power-down is the last instruction executed. Only the contents of the on-chip RAM are preserved. A hardware reset is the only way to terminate the power-down mode. The control bits for the reduced power modes are in the special function register PCON. Table 1. External Pin Status During Idle and Power-Down Modes MODE Idle Power-down * Port 0* Data Data Port 1 Data Data Port 2 Data Data Except for PWM output (P0.4). 1998 May 01 6 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 READ LATCH ALTERNATE OUTPUT FUNCTION VDD INTERNAL PULL-UP READ LATCH ALTERNATE OUTPUT FUNCTION INT. BUS D P1.X LATCH Q P1.X PIN Q INT. BUS D P0.X LATCH Q P0.X PIN Q WRITE TO LATCH CL WRITE TO LATCH CL READ PIN ALTERNATE INPUT FUNCTION READ PIN ALTERNATE INPUT FUNCTION SU00306 Figure 1. Port Bit Latches and I/O Buffers I/O Ports The I/O pins provided by the 83C752 consist of port 0, port 1, and port 3. Port 0 Port 0 is a 5-bit bidirectional I/O port and includes alternate functions on some pins of this port. Pins P0.3 and P0.4 are provided with internal pullups while the remaining pins (P0.0, P0.1, and P0.2) have open drain output structures. The alternate functions for port 0 are: P0.0 P0.1 P0.4 SCL - the I2C bus clock SDA - the I2C bus data PWM - the PWM output I2 C Counter/Timer Subsystem The 8XC752 has one counter/timer called timer/counter 0. Its operation is similar to mode 2 operation on the 80C51, but is extended to 16 bits with 16 bits of autoload. The controls for this counter are centralized in a single register called TCON. A watchdog timer, called Timer I, is for use with the I2C subsystem. In I2C applications, this timer is dedicated to time-generation and bus monitoring of the I2C. In non-I2C applications, it is available for use as a fixed time-base. Interrupt Subsystem--Fixed Priority The IP register and the 2-level interrupt system of the 80C51 are eliminated. The interrupt structure is a seven-source, one-level interrupt system similar to the 8XC751. Simultaneous interrupt conditions are resolved by a single-level, fixed priority as follows: Highest priority: Pin INT0 Counter/timer flag 0 Pin INT1 PWM Timer I Serial I2C Lowest priority: ADC The vector addresses are as follows: Source INT0 TF0 INT1 TIMER I SIO ADC PWM Vector Address 0003H 000BH 0013H 001BH 0023H 002BH 0033H and PWM, are not being used, then If the alternate functions, these pins may be used as I/O ports. Port 1 Port 1 is an 8-bit bidirectional I/O port whose structure is identical to the 80C51, but also includes alternate input functions on all pins. The alternate pin functions for port 1 are: P1.0-P1.4 - ADC0-ADC4 - A/D converter analog inputs P1.5 INT0 - external interrupt 0 input P1.6 INT1 - external interrupt 1 input P1.7 - T0 - timer 0 external input If the alternate functions INT0, INT1, or T0 are not being used, these pins may be used as standard I/O ports. It is necessary to connect AVCC and AVSS to VCC and VSS, respectively, in order to use these pins as standard I/O pins. When the A/D converter is enabled, the analog channel connected to the A/D may not be used as a digital input; however, the remaining analog inputs may be used as digital inputs. They may not be used as digital outputs. While the A/D is enabled, the analog inputs are floating. Port 3 Port 3 is an 8-bit bidirectional I/O port whose structure is identical to the 80C51. Note that the alternate functions associated with port 3 of the 80C51 have been moved to port 1 of the 83C752 (as applicable). See Figure 1 for port bit configurations. Interrupt Control Registers The 80C51 interrupt enable register is modified to take into account the different interrupt sources of the 8XC752. 1998 May 01 7 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 Interrupt Enable Register MSB EA EAD ETI ES EPWM EX1 ET0 LSB EX0 Pulse Width Modulation Output (P0.4) The PWM outputs pulses of programmable length and interval. The repetition frequency is defined by an 8-bit prescaler which generates the clock for the counter. The prescaler register is PWMP. The prescaler and counter are not associated with any other timer. The 8-bit counter counts modulo 255, that is from 0 to 254 inclusive. The value of the 8-bit counter is compared to the contents of a compare register, PWM. When the counter value matches the contents of this register, the output of the PWM is set high. When the counter reaches zero, the output of the PWM is set low. The pulse width ratio (duty cycle) is defined by the contents of the compare register and is in the range of 0 to 1 programmed in increments of 1/255. The PWM output can be set to be continuously high by loading the compare register with 0 and the output can be set to be continuously low by loading the compare register with 255. The PWM output is enabled by a bit in a special function register, PWENA. When enabled, the pin output is driven with a fully active pull-up. That is, when the output is high, a strong pull-up is continuously applied. when disabled, the pin functions as a normal bidirectional I/O pin, however, the counter remains active. The PWM function is disabled during RESET and remains disabled after reset is removed until re-enabled by software. The PWM output is high during power down and idle. The counter is disabled during idle. The repetition frequency of the PWM is given by: fPWM = fOSC / 2 (1 + PWMP) 255 The low/high ratio of the PWM signal is PWM / (255 - PWM) for PWM not equal to 255. For PWM = 255, the output is always low. The repetition frequency range is 92Hz to 23.5kHz for an oscillator frequency of 12MHz. An interrupt will be asserted upon PWM counter overflow if the interrupt is not masked off. The PWM output is an alternative function of P0.4. In order to use this port as a bidirectional I/O port, the PWM output must be disabled by clearing the enable/disable bit in PWENA. In this case, the PWM subsystem can be used as an interval timer by enabling the PWM interrupt. Position IE.7 IE.6 IE.5 IE.4 IE.3 IE.2 IE.1 IE.0 Symbol EA EAD ETI ES EPWM EX1 ET0 EX0 Function Global interrupt disable when EA = 0 A/D conversion complete Timer I I2C serial port PWM counter overflow External interrupt 1 Timer 0 overflow External interrupt 0 Serial Communications The 8XC752 contains an I2C serial communications port instead of the 80C51 UART. The I2C serial port is a single bit hardware interface with all of the hardware necessary to support multimaster and slave operations. Also included are receiver digital filters and timer (timer I) for communication watch-dog purposes. The I2C serial port is controlled through four special function registers; I2C control, I2C data, I2C status, and I2C configuration. The I2C bus uses two wires (SDA and SCL) to transfer information between devices connected to the bus. The main technical features of the bus are: * Bidirectional data transfer between masters and slaves * Serial addressing of slaves * Acknowledgment after each transferred byte * Multimaster bus * Arbitration between simultaneously transmitting master without corruption of serial data on bus feet (30M) * With 82B715, communication distance is extended to beyond 100 A large family of I2C compatible ICs is available. See the I2C section for more details on the bus and available ICs. The 83C752 I2C subsystem includes hardware to simplify the software required to drive the I2C bus. This circuitry is the same as that on the 83C751. (See the 83C751 section for a detailed discussion of this subsystem). 1998 May 01 8 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 Table 2. SYMBOL ACC* ADAT# ADCON# B* DPTR: DPL DPH I2CFG*# 8XC752 Special Function Registers DESCRIPTION Accumulator A/D result A/D control B register Data pointer (2 bytes) Data pointer low Data pointer high I2C configuration DIRECT BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION ADDRESS MSB LSB E0H 84H A0H F0H - F7 - F6 ENADC F5 ADCI F4 ADCS F3 AADR2 F2 AADR1 F1 AADR0 F0 E7 E6 E5 E4 E3 E2 E1 E0 RESET VALUE 00H 00H C0H 00H 82H 83H DF D8H/RD WR SLAVEN SLAVEN 00H 00H DE MASTRQ MASTRQ DD 0 CLRTI 9D DRDY CDR 0 X FD XDATA AD ETI - - 95 INT0 B5 - D5 F0 DC TIRUN TIRUN 9C ARL CARL 0 X FC XACTV AC ES 84 PWM0 94 ADC4 B4 - D4 RS1 DB - - 9B STR CSTR 0 X FB MAKSTR DA - - 9A STP CSTP 0 X FA MAKSTP D9 CT1 CT1 99 MASTER D8 CT0 CT0 98 - XSTP 0 X F8 XSTP A8 EX0 80 SCL 90 ADC0 B0 IDL D0 P 00H xxxxxxxxB FFH xxxx0000B FFH 00H xxx11111B x0100000B 80H 81H 0000xx00B 9F I2CON*# I2DAT# I2C control 98H/RD WR I2C data 99H/RD WR I2STA*# I2C RDAT CXA RDAT XDAT FF status F8H - AF IE*# Interrupt enable ADH EA - P0*# Port 0 80H - 97 P1*# P3* PCON# Port 1 Port 3 Power control 90H B0H 87H T0 B7 - D7 PSW* PWCM# PWENA# PWMP# RTL# RTH# SP TL# TH# Program status word PWM compare PWM enable PWM prescaler Timer low reload Timer high reload Stack pointer Timer low Timer high D0H 8EH FEH 8FH 8BH 8DH 81H 8AH 8CH 8F TCON*# Timer control 88H GATE * SFRs are bit addressable. # SFRs are modified from or added to the 80C51 SFRs. - CY 9E ATN IDLE 0 X FE IDLE AE EAD - - 96 INT1 B6 - D6 AC XSTR 0 X F9 XSTR A9 ET0 81 SDA 91 ADC1 B1 PD D1 - AB EPWM 83 - 93 ADC3 B3 - D3 RS0 AA EX1 82 - 92 ADC2 B2 - D2 OV - - - - - - PWE FEH 00H 00H 00H 07H 00H 00H 8E C/T 8D TF 8C TR 8B IE0 8A IT0 89 IE1 88 IT1 00H 1998 May 01 9 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 Special Function Register Addresses Special function registers for the 8XC752 are identical to those of the 80C51, except for the changes listed below: 80C51 special function registers not present in the 8XC752 are TMOD (89), P2 (A0) and IP (B8). The 80C51 registers TH1, TL1, SCON, and SBUF are replaced with the 8XC752 registers RTH, RTL, I2CON, and I2DAT, respectively. Additional special function registers are I2CFG (D8) and I2STA (FB), ADCON (A0), ADAT (84), PWM (8E), PWMP (8F), and PWENA (FE). See Table 3. A/D Converter The analog input circuitry consists of a 5-input analog multiplexer and an A to D converter with 8-bit resolution. The conversion takes 40 machine cycles, i.e., 40s at 12MHz oscillator frequency. The A/D converter is controlled using the ADCON control register. Input channels are selected by the analog multiplexer through ADCON register bits 0-2. The 83C752 contains a five-channel multiplexed 8-bit A/D converter. The conversion requires 40 machine cycles (40s at 12MHz oscillator frequency). The A/D converter is controlled by the A/D control register, ADCON. Input channels are selected by the analog multiplexer by bits ADCON.0 through ADCON.2. The ADCON register is not bit addressable. ADCON Register MSB X X ENADC ADCI ADCS AADR2 AADR1 LSB AADR0 Position Symbol Function ADCON.5 ENADC Enable A/D function when ENADC = 1. Reset forces ENADC = 0. ADCON.4 ADCI ADC interrupt flag. This flag is set when an ADC conversion is complete. If IE.6 = 1, an interrupt is requested when ADCI = 1. The ADCI flag is cleared when conversion data is read. This flag is read only. ADCON.3 ADCS ADC start. Setting this bit starts an A/D conversion. Once set, ADCS remains high throughout the conversion cycle. On completion of the conversion, it is reset just before the ADCI interrupt flag is cleared. ADCS cannot be reset by software. ADCS should not be used to monitor the A/D converter status. ADCI should be used for this purpose. ADCON.2 AADR2 Analog input select. ADCON.1 AADR1 Analog input select. ADCON.0 AADR0 Analog input select. This binary coded address selects one of the five analog input port pins of P1 to be input to the converter. It can only be changed when ADCI and ADCS are both low. AADR2 is the most significant bit. The completion of the 8-bit ADC conversion is flagged by ADCI in the ADCON register, and the result is stored in the special function register ADAT. An ADC conversion in progress is unaffected by an ADC start. The result of a completed conversion remains unaffected provided ADCI remains at a logic 1. While ADCS is a logic 1 or ADCI is a logic 1, a new ADC START will be blocked and consequently lost. An ADC conversion in progress is aborted when the idle or power-down mode is entered. The result of a completed conversion (ADCI = logic 1) remains unaffected when entering the idle mode. See Figure 2 for an A/D input equivalent circuit. The analog input pins ADC0-ADC4 may be used as digital inputs and outputs when the A/D converter is disabled by a 0 in the ENADC bit in ADCON. When the A/D is enabled, the analog input channel that is selected by the ADDR2-ADDR0 bits in ADCON cannot be used as a digital input. Reading the selected A/D channel as a digital input will always return a 1. The unselected A/D inputs may always be used as digital inputs. Unselected analog inputs will be floating and may not be used as digital outputs. The A/D reference inputs on the 8XC752 are tied together with the analog supply pins AVCC and AVSS. This means that the reference voltage on the A/D cannot be varied separately from the analog supply pins. AVSS must be connected to 0V and AVCC must be connected to a supply voltage between 4.5V and 5.5V. A/D measurements may be made in the range of 4.5V to 5.5V. Increasing the voltage on the A/D ground reference above 0V or reducing the voltage on the positive A/D reference below 4.5V is not permitted. ADCI 0 0 1 1 ADCS 0 1 0 1 Operation ADC not busy, a conversion can be started. ADC busy, start of a new conversion is blocked. Conversion completed, start of a new conversion is blocked. Not possible. INPUT CHANNEL SELECTION ADDR2 0 0 0 0 1 ADDR1 0 0 1 1 0 ADDR0 0 1 0 1 0 INPUT PIN P1.0 P1.1 P1.2 P1.3 P1.4 1998 May 01 10 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 SmN+1 IN+1 SmN RmN+1 IN + RmN To Comparator Multiplexer RS VANALOG INPUT CS CC Rm = 0.5 - 3 k CS + CC = 15pF maximum RS = Recommended < 9.6 k for 1 LSB @ 12MHz NOTE: Because the analog to digital converter has a sampled-data comparator, the input looks capacitive to a source. When a conversion is initiated, switch Sm closes for 8tcy (8s @ 12MHz crystal frequency) during which time capacitance Cs + Cc is charged. It should be noted that the sampling causes the analog input to present a varying load to an analog source. SU00199 Figure 2. A/D Input: Equivalent Circuit A/D CONVERTER PARAMETER DEFINITIONS The following definitions are included to clarify some specifications given and do not represent a complete set of A/D parameter definitions. Gain Error Gain error is the deviation between the ideal and actual analog input voltage required to cause the final code transition to a full-scale output code after the offset error has been removed. This may sometimes be referred to as full scale error. Absolute Accuracy Error Absolute accuracy error of a given output is the difference between the theoretical analog input voltage to produce a given output and the actual analog input voltage required to produce the same code. Since the same output code is produced by a band of input voltages, the "required input voltage" is defined as the midpoint of the band of input voltage that will produce that code. Absolute accuracy error not specified with a code is the maximum over all codes. Offset Error Offset error is the difference between the actual input voltage that causes the first code transition and the ideal value to cause the first code transition. This ideal value is 1/2 LSB above Vref-. Channel to Channel Matching Channel to channel matching is the maximum difference between the corresponding code transitions of the actual characteristics taken from different channels under the same temperature, voltage and frequency conditions. Nonlinearity If a straight line is drawn between the end points of the actual converter characteristics such that zero offset and full scale errors are removed, then non-linearity is the maximum deviation of the code transitions of the actual characteristics from that of the straight line so constructed. This is also referred to as relative accuracy and also integral non-linearity. Crosstalk Crosstalk is the measured level of a signal at the output of the converter resulting from a signal applied to one deselected channel. Total Error Maximum deviation of any step point from a line connecting the ideal first transition point to the ideal last transition point. Differential Non-Linearity Differential non-linearity is the maximum difference between the actual and ideal code widths of the converter. The code widths are the differences expressed in LSB between the code transition points, as the input voltage is varied through the range for the complete set of codes. Relative Accuracy Relative accuracy error is the deviation of the ADC's actual code transition points from the ideal code transition points on a straight line which connects the ideal first code transition point and the final code transition point, after nullifying offset error and gain error. It is generally expressed in LSBs or in percent of FSR. 1998 May 01 11 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 COUNTER/TIMER The 8XC752 counter/timer is designated Timer 0 and is separate from Timer I of the I2C serial port and from the PWM. Its operation is similar to mode 2 of the 80C51 counter/timer, extended to 16 bits. When Timer 0 is used in the external counter mode, the T0 input (P1.7) is sampled every S4P1. The counter/timer function is controlled using the timer control register (TCON). TCON Register MSB GATE C/T TF TR IE0 IT0 IE1 LSB IT1 These flags are functionally identical to the corresponding 80C51 flags except that there is only one of the 80C51 style timers, and the flags are combined into one register. Note that the positions of the IE0/IT0 and IE1/IT1 bits are transposed from the positions used in the standard 80C51 TCON register. A communications watchdog timer, Timer I, is described in the I2C section. In I2C applications, this timer is dedicated to time generation and bus monitoring for the I2C. In non-I2C applications, it is available for use as a fixed time base. The 16-bit timer/counter's operation is similar to mode 2 operation on the 80C51, but is extended to 16 bits. The timer/counter is clocked by either 1/12 the oscillator frequency or by transitions on the T0 pin. The C/T pin in special function register TCON selects between these two modes. When the TCON TR bit is set, the timer/counter is enabled. Register pair TH and TL are incremented by the clock source. When the register pair overflows, the register pair is reloaded with the values in registers RTH and RTL. The value in the reload registers is left unchanged. The TF bit in special function register TCON is set on counter overflow and, if the interrupt is enabled, will generate an interrupt (see Figure 3). Position Symbol Function TCON.7 GATE 1 - Timer 0 is enabled only when INT0 pin is high and TR is 1. 0 - Timer 0 is enabled only when TR is 1. TCON.6 C/T 1 - Counter operation from T0 pin. 0 - Timer operation from internal clock. TCON.5 TF 1 - Set on overflow of T0. 0 - Cleared when processor vectors to interrupt routine and by reset. TCON.4 TR 1 - Enable timer 0 0 - Disable timer 0 TCON.3 IE0 1 - Edge detected on INT0 TCON.2 IT0 1 - INT0 is edge triggered. 0 - INT0 is level sensitive. TCON.1 IE1 1 - Edge detected on INT1 TCON.0 IT1 1 - INT1 is edge triggered. 0 - INT1 is level sensitive. OSC / 12 C/T = 0 TL C/T = 1 TH TF Int. T0 Pin TR Reload Gate INT0 Pin RTL RTH SU00300 Figure 3. 83C752 Counter/Timer Block Diagram Table 3. I2C Special Function Register Addresses REGISTER ADDRESS NAME I2C I2C control I2C data configuration I2C status SYMBOL I2CON I2DAT I2CFG I2STA ADDRESS 98 99 D8 F8 MSB 9F - DF FF 9E - DE FE 9D - DD FD 9C - DC FC 9B - DB FB BIT ADDRESS LSB 9A - DA FA 99 - D9 F9 98 - D8 F8 1998 May 01 12 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 ABSOLUTE MAXIMUM RATINGS1, 3, 4 PARAMETER Storage temperature range Voltage from VCC to VSS Voltage from any pin to VSS (except VPP) Power dissipation Voltage from VPP pin to VSS RATING -65 to +150 -0.5 to +6.5 -0.5 to VCC + 0.5 1.0 -0.5 to + 13.0 UNIT C V V W V DC ELECTRICAL CHARACTERISTICS Tamb = 0C to +70C or -40C to +85C, AVCC = 5V 5, AVSS = 0V4 VCC = 5V 10%, VSS = 0V TEST SYMBOL ICC Inputs VIL VIH VIH1 Input low voltage, except SDA, SCL Input high voltage, except X1, RST Input high voltage, X1, RST SDA, SCL, P0.2 Input low voltage Input high voltage (0 to 70C) (-40 to +85C) (0 to 70C) (-40 to +85C) (0 to 70C) (-40 to +85C) (0 to 70C) (-40 to +85C) (0 to 70C) (-40 to -85C) -0.5 -0.5 0.2VCC+0.9 (0.2VCC+1) 0.7VCC 0.7VCC to 0.1 -0.5 -0.5 0.7VCC 0.7VCC+0.1 0.2VCC-0.1 0.2VCC-0.15 VCC+0.5 VCC+0.5 VCC+0.5 VCC+0.5 0.3VCC 0.3VCC-0.1 VCC+0.5 VCC+0.5 V V V V V V V V V PARAMETER Supply current (see Figure 6) CONDITIONS MIN LIMITS4 Typical1 MAX UNIT VIL1 VIH2 Outputs VOL VOL1 VOH Output low voltage, ports 1, 3, 0.3, and 0.4 (PWM disabled) Output low voltage, port 0.2 Output high voltage, ports 1, 3, 0.3, and 0.4 (PWM disabled) IOL = 1.6mA2 IOL = 3.2mA2 IOH = -60A, IOH = -25A IOH = -10A IOH = -400A IOH = -40A IOL = 3mA (over VCC range) ( ) 2.4 0.75VCC 0.9VCC 2.4 0.9VCC 0.45 0.45 V V V V V V V VOH2 VOL2 C IIL ITL ILI RRST CIO IPD Output high voltage, P0.4 (PWM enabled) Port 0.0 and 0.1 (I2C) - Drivers Output low voltage Driver, receiver combined: Capacitance Logical 0 input current, ports 1, 3, 0.3, and 0.4 (PWM disabled)11 Logical 1 to 0 transition current, ports 1, 3, 0.3 and 0.411 Input leakage current, port 0.0, 0.1 and 0.2 Reset pull-down resistor Pin capacitance Power-down current5 0.4 10 V pF A A A A A k pF A VIN = 0.45V (0 to 70C) VIN = 0.45V (0 to +85C) VIN = 2V (0 to 70C) VIN = 2V (-40 to +85C) 0.45 < VIN < VCC 25 Test freq = 1MHz, Tamb = 25C VCC = 2 to 5.5V VCC = 2 to 6.0V (83C752) VSS = 0V VCC = 5V10% Tamb = 21C to 27C VPP = 13.0V 12.5 -50 -75 -650 -750 10 175 10 50 VPP VPP program voltage (87C752 only) 13.0 V IPP Program current (87C752 only) 50 mA 1998 May 01 13 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 DC ELECTRICAL CHARACTERISTICS (Continued) Tamb = 0C to +70C or -40C to +85C, AVCC = 5V 5, AVSS = 0V4 VCC = 5V 10%, VSS = 0V TEST SYMBOL PARAMETER CONDITIONS MIN LIMITS4 Typical1 MAX UNIT Analog Inputs (A/D guaranteed only with quartz window covered.) AVCC AICC AVIN CIA tADS tADC R ERA OSe Ge MCTC Ct Analog supply voltage10 Analog operating supply current Analog input voltage12 Analog input capacitance Sampling time Conversion time Resolution Relative accuracy Zero scale offset Full scale gain error Channel to channel matching Crosstalk 0-100kHz AVCC = VCC0.2V AVCC = 5.12V AVSS-0.2 4.5 5.5 39 AVCC+0.2 15 8tCY 40tCY 8 1 1 0.4 1 -60 V mA V pF s s bits LSB LSB % LSB dB NOTES: 1. 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 these or any conditions other than those described in the AC and DC Electrical Characteristics section of this specification is not implied. 2. Under steady state (non-transient) conditions, IOL must be externally limited as follows: 10mA (NOTE: This is 85C spec.) Maximum IOL per port pin: Maximum IOL per 8-bit port: 26mA 67mA Maximum total IOL for all outputs: If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions. 3. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima. 4. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted. 5. Power-down ICC is measured with all output pins disconnected; port 0 = VCC; X2, X1 n.c.; RST = VSS. 6. ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC - 0.5V; X2 n.c.; RST = port 0 = VCC. ICC will be slightly higher if a crystal oscillator is used. 7. Idle ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC - 0.5V; X2 n.c.; port 0 = VCC; RST = VSS. 8. Load capacitance for ports = 80pF. 9. The resistor ladder network is not disconnected in the power down or idle modes. Thus, to conserve power, the user may remove AVCC. 10. If the A/D function is not required, or if the A/D function is only needed periodically, AVCC may be removed without affecting the operation of the digital circuitry. Contents of ADCON and ADAT are not guaranteed to be valid. If AVCC is removed, the A/D inputs must be lowered to less than 0.5V. Digital inputs on P1.0-P1.4 will not function normally. 11. These parameters do not apply to P1.0-P1.4 if the A/D function is enabled. 12. The input voltage slew rate should be <10V/ms. The maximum slew rate depends on the clock frequency of the microcontroller. Designers should use low pass filters before the A/D inputs as a precaution to noise edges causing false readings. 1998 May 01 14 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 AC ELECTRICAL CHARACTERISTICS Tamb = 0C to +70C or -40C to +85C, VCC = 5V 10%, VSS = 0V4, 8 12MHz CLOCK SYMBOL 1/tCLCL PARAMETER Oscillator frequency: MIN MAX VARIABLE CLOCK MIN 3.5 3.5 MAX 12 16 UNIT MHz MHz External Clock (Figure 4) tCHCX tCLCX tCLCH tCHCL High time Low time Rise time Fall time 20 20 20 20 20 20 20 20 ns ns ns ns EXPLANATION OF THE AC SYMBOLS Each timing symbol has five characters. The first character is always `t' (= time). The other characters, depending on their positions, indicate the name of a signal or the logical status of that signal. The designations are: C - Clock D - Input data H - Logic level high L - Logic level low Q - Output data T - Time V - Valid X - No longer a valid logic level Z - Float VCC -0.5 0.2 VCC + 0.9 0.2 VCC - 0.1 0.45V tCLCX tCHCX tCHCL tCLCL tCLCH SU00297 Figure 4. External Clock Drive VCC -0.5 0.2 VCC + 0.9 0.2 VCC - 0.1 0.45V SU00307 Figure 5. AC Testing Input/Output 1998 May 01 15 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 MAX ACTIVE ICC6 22 20 18 16 14 12 10 8 6 4 2 MAX IDLE ICC7 TYP ACTIVE ICC6 ICC mA TYP IDLE ICC7 4MHz 8MHz FREQ 12MHz 16MHz SU00308 Figure 6. ICC vs. FREQ Maximum ICC values taken at VCC = 5.5V and worst case temperature. Typical ICC values taken at VCC = 5.0V and 25C. Notes 6 and 7 refer to AC Electrical Characteristics. PROGRAMMING CONSIDERATIONS EPROM Characteristics The 87C752 is programmed by using a modified Quick-Pulse Programming algorithm similar to that used for devices such as the 87C451 and 87C51. It differs from these devices in that a serial data stream is used to place the 87C752 in the programming mode. Figure 7 shows a block diagram of the programming configuration for the 87C752. Port pin P0.2 is used as the programming voltage supply input (VPP signal). Port pin P0.1 is used as the program (PGM/) signal. This pin is used for the 25 programming pulses. Port 3 is used as the address input for the byte to be programmed and accepts both the high and low components of the eleven bit address. Multiplexing of these address components is performed using the ASEL input. The user should drive the ASEL input high and then drive port 3 with the high order bits of the address. ASEL should remain high for at least 13 clock cycles. ASEL may then be driven low which latches the high order bits of the address internally. The high address should remain on port 3 for at least two clock cycles after ASEL is driven low. Port 3 may then be driven with the low byte of the address. The low address will be internally stable 13 clock cycles later. The address will remain stable provided that the low byte placed on port 3 is held stable and ASEL is kept low. Note: ASEL needs to be pulsed high only to change the high byte of the address. Port 1 is used as a bidirectional data bus during programming and verify operations. During programming mode, it accepts the byte to be programmed. During verify mode, it provides the contents of the EPROM location specified by the address which has been supplied to Port 3. The XTAL1 pin is the oscillator input and receives the master system clock. This clock should be between 1.2 and 6MHz. The RESET pin is used to accept the serial data stream that places the 87C752 into various programming modes. This pattern consists of a 10-bit code with the LSB sent first. Each bit is synchronized to the clock input, X1. Programming Operation Figures 8 and 9 show the timing diagrams for the program/verify cycle. RESET should initially be held high for at least two machine cycles. P0.1 (PGM/) and P0.2 (VPP) will be at VOH as a result of the RESET operation. At this point, these pins function as normal quasi-bidirectional I/O ports and the programming equipment may pull these lines low. However, prior to sending the 10-bit code on the RESET pin, the programming equipment should drive these pins high (VIH). The RESET pin may now be used as the serial data input for the data stream which places the 87C752 in the programming mode. Data bits are sampled during the clock high time and thus should only change during the time that the clock is low. Following transmission of the last data bit, the RESET pin should be held low. Next the address information for the location to be programmed is placed on port 3 and ASEL is used to perform the address multiplexing, as previously described. At this time, port 1 functions as an output. 1998 May 01 16 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 A high voltage VPP level is then applied to the VPP input (P0.2). (This sets Port 1 as an input port). The data to be programmed into the EPROM array is then placed on Port 1. This is followed by a series of programming pulses applied to the PGM/ pin (P0.1). These pulses are created by driving P0.1 low and then high. This pulse is repeated until a total of 25 programming pulses have occurred. At the conclusion of the last pulse, the PGM/ signal should remain high. The VPP signal may now be driven to the VOH level, placing the 87C752 in the verify mode. (Port 1 is now used as an output port). After four machine cycles (48 clock periods), the contents of the addressed location in the EPROM array will appear on Port 1. The next programming cycle may now be initiated by placing the address information at the inputs of the multiplexed buffers, driving the VPP pin to the VPP voltage level, providing the byte to be programmed to Port1 and issuing the 26 programming pulses on the PGM/ pin, bringing VPP back down to the VC level and verifying the byte. memory will be encrypted with the second byte in the encryption table and so forth up to and including the 16the byte. The encryption repeats in 16-byte groups; the 17th byte in the code memory will be encrypted with the first byte in the encryption table, and so forth. Security Bits Two security bits, security bit 1 and security bit 2, are provided to limit access to the USER EPROM and encryption key arrays. Security bit 1 is the program inhibit bit, and once programmed performs the following functions: 1. Additional programming of the USER EPROM is inhibited. 2. Additional programming of the encryption key is inhibited. 3. Verification of the encryption key is inhibited. 4. Verification of the USER EPROM and the security bit levels may still be performed. (If the encryption key array is being used, this security bit should be programmed by the user to prevent unauthorized parties from reprogramming the encryption key to all logical zero bits. Such programming would provide data during a verify cycle that is the logical complement of the USER EPROM contents). Security bit 2, the verify inhibit bit, prevents verification of both the USER EPROM array and the encryption key arrays. The security bit levels may still be verified. Programming Modes The 87C752 has four programming features incorporated within its EPROM array. These include the USER EPROM for storage of the application's code, a 16-byte encryption key array and two security bits. Programming and verification of these four elements are selected by a combination of the serial data stream applied to the RESET pin and the voltage levels applied to port pins P0.1 and P0.2. The various combinations are shown in Table 4. Programming and Verifying Security Bits Security bits are programmed employing the same techniques used to program the USER EPROM and KEY arrays using serial data streams and logic levels on port pins indicated in Table 4. When programming either security bit, it is not necessary to provide address or data information to the 87C752 on ports 1 and 3. Verification occurs in a similar manner using the RESET serial stream shown in Table 4. Port 3 is not required to be driven and the results of the verify operation will appear on ports 1.6 and 1.7. Ports 1.7 contains the security bit 1 data and is a logical one if programmed and a logical zero if not programmed. Likewise, P1.6 contains the security bit 2 data and is a logical one if programmed and a logical zero if not programmed. Encryption Key Table The 87C752 includes a 16-byte EPROM array that is programmable by the end user. The contents of this array can then be used to encrypt the program memory contents during a program memory verify operation. When a program memory verify operation is performed, the contents of the program memory location is XNOR'ed with one of the bytes in the 16-byte encryption table. The resulting data pattern is then provided to port 1 as the verify data. The encryption mechanism can be disable, in essence, by leaving the bytes in the encryption table in their erased state (FFH) since the XNOR product of a bit with a logical one will result in the original bit. The encryption bytes are mapped with the code memory in 16-byte groups. the first byte in code memory will be encrypted with the first byte in the encryption table; the second byte in code Table 4. Implementing Program/Verify Modes OPERATION Program user EPROM Verify user EPROM Program key EPROM Verify key EPROM Program security bit 1 Program security bit 2 Verify security bits NOTE: * Pulsed from VIH to VIL and returned to VIH. SERIAL CODE 296H 296H 292H 292H 29AH 298H 29AH P0.1 (PGM/) -* VIH -* VIH -* -* VIH P0.2 (VPP) VPP VIH VPP VIH VPP VPP VIH 1998 May 01 17 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 EPROM PROGRAMMING AND VERIFICATION Tamb = 21C to +27C, VCC = 5V 10%, VSS = 0V SYMBOL 1/tCLCL tAVGL1 tGHAX tDVGL tDVGL tGHDX tSHGL tGHSL tGLGH tAVQV2 tGHGL tSYNL tSYNH tMASEL tMAHLD tHASET tADSTA PARAMETER Oscillator/clock frequency Address setup to P0.1 (PROG-) low Address hold after P0.1 (PROG-) high Data setup to P0.1 (PROG-) low Data setup to P0.1 (PROG-) low Data hold after P0.1 (PROG-) high VPP setup to P0.1 (PROG-) low VPP hold after P0.1 (PROG-) P0.1 (PROG-) width VPP low (VCC) to data valid P0.1 (PROG-) high to P0.1 (PROG-) low P0.0 (sync pulse) low P0.0 (sync pulse) high ASEL high time Address hold time Address setup to ASEL Low address to address stable 10 4tCLCL 8tCLCL 13tCLCL 2tCLCL 13tCLCL 13tCLCL MIN 1.2 10s + 24tCLCL 48tCLCL 38tCLCL 38tCLCL 36tCLCL 10 10 90 110 48tCLCL s s s s MAX 6 UNIT MHz NOTES: 1. Address should be valid at least 24tCLCL before the rising edge of P0.2 (VPP). 2. For a pure verify mode, i.e., no program mode in between, tAVQV is 14tCLCL maximum. 87C752 A0-A10 ADDRESS STROBE P3.0-P3.7 P0.0/ASEL VCC VSS +5V PROGRAMMING PULSES VPP/VIH VOLTAGE SOURCE CLK SOURCE P0.1 P0.2 XTAL1 P1.0-P1.7 DATA BUS RESET CONTROL LOGIC RESET SU00320 Figure 7. Programming Configuration XTAL1 MIN 2 MACHINE CYCLES RESET BIT 0 BIT 1 BIT 2 TEN BIT SERIAL CODE BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 P0.2 UNDEFINED P0.1 UNDEFINED SU00302 Figure 8. Entry into Program/Verify Modes 1998 May 01 18 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 12.75V P0.2 (VPP) 5V tSHGL 25 PULSES 5V tGHSL P0.1 (PGM) tMASEL tGLGH 98s MIN P0.0 (ASEL) 10s MIN tGHGL tHASET PORT 3 HIGH ADDRESS tHAHLD LOW ADDRESS tADSTA PORT 1 INVALID DATA VERIFY MODE VALID DATA tDVGL tGHDX tAVQV INVALID DATA VERIFY MODE VALID DATA DATA TO BE PROGRAMMED PROGRAM MODE SU00310 Figure 9. Program/Verify Cycle Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specifications defined by Philips. This specification can be ordered using the code 9398 393 40011. 1998 May 01 19 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 SSOP28: plastic shrink small outline package; 28 leads; body width 5.3mm SOT341-1 1998 May 01 20 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 DIP28: plastic dual in-line package; 28 leads (600 mil); long body SOT117-2 1998 May 01 21 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 PLCC28: plastic leaded chip carrer; 28 leads; pedestal SOT261-3 1998 May 01 22 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 NOTES 1998 May 01 23 Philips Semiconductors Product specification 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8 bit A/D, I2C, PWM, low pin count 83C752/87C752 Data sheet status Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Production [1] Please consult the most recently issued datasheet before initiating or completing a design. Definitions Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Date of release: 05-98 Document order number: 9397 750 03843 Philips Semiconductors 1998 May 01 24 |
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