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To all our customers
Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp.
The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices and power devices.
Renesas Technology Corp. Customer Support Dept. April 1, 2003
Rev.1.0
Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Description
The M16C/30 group of single-chip microcomputers are built using the high-performance silicon gate CMOS process using a M16C/60 Series CPU core and are packaged in a 100-pin plastic molded QFP. These single-chip microcomputers operate using sophisticated instructions featuring a high level of instruction efficiency. With 1M bytes of address space, they are capable of executing instructions at high speed. They also feature a built-in multiplier and DMAC, making them ideal for controlling office, communications, industrial equipment, and other high-speed processing applications. The M16C/30 group includes a wide range of products with different internal memory sizes and various package types.
Features
* Memory capacity .................................. ROM (See Figure 1.1.4. ROM Expansion) RAM 2K to 3K bytes * Shortest instruction execution time ...... 62.5ns (f(XIN)=16MHZ, VCC=5V) 100ns (f(XIN)=10MHZ, VCC=3V, with software one-wait) * Supply voltage ..................................... 4.2V to 5.5V (f(XIN)=16MHZ, without software wait) 2.7V to 5.5V (f(XIN)=10MHZ with software one-wait) * Low power consumption ...................... 25.5mW ( f(XIN)=10MHZ, with software one-wait, VCC = 3V) * Interrupts .............................................. 16 internal and 5 external interrupt sources, 4 software interrupt sources; 7 levels (including key input interrupt) * Multifunction 16-bit timer ...................... 3 output timers + 2 input timers * Serial I/O .............................................. 3 channels (3 for UART or clock synchronous) * DMAC .................................................. 1 channels (trigger: 14 sources) * A-D converter ....................................... 10 bits X 8 channels (Expandable up to 10 channels) * Watchdog timer .................................... 1 line * Programmable I/O port ........................ 87 lines _______ * Input port .............................................. 1 line (P85 shared with NMI pin) * Memory expansion .............................. Available (to a maximum of 1M bytes) * Chip select output ................................ 4 lines * Clock generating circuit ....................... 2 built-in clock generation circuits (built-in feedback resistor, and external ceramic or quartz oscillator)
Applications
Audio, cameras, office equipment, communications equipment, portable equipment
------Table of Contents-----Central Processing Unit (CPU) ..................... 11 Reset ............................................................. 14 Processor Mode ............................................ 21 Clock Generating Circuit ............................... 34 Protection ...................................................... 43 Interrupt ......................................................... 44 Watchdog Timer ............................................ 64 DMAC ........................................................... 66 Timer ............................................................. 75 Serial I/O ....................................................... 93 A-D Converter ............................................. 130 Programmable I/O Ports ............................. 136 Electrical characteristics ............................. 146
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pin Configuration
Figures 1.1.1 and 1.1.2 show the pin configurations (top view).
PIN CONFIGURATION (top view)
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
P10/D8 P11/D9 P12/D10 P13/D11 P14/D12 P15/D13 P16/D14 P17/D15 P20/A0(/D0/-) P21/A1(/D1/D0) P22/A2(/D2/D1) P23/A3(/D3/D2) P24/A4(/D4/D3) P25/A5(/D5/D4) P26/A6(/D6/D5) P27/A7(/D7/D6) Vss P30/A8(/-/D7) Vcc P31/A9 P32/A10 P33/A11 P34/A12 P35/A13 P36/A14 P37/A15 P40/A16 P41/A17 P42/A18 P43/A19
P07/D7 P06/D6 P05/D5 P04/D4 P03/D3 P02/D2 P01/D1 P00/D0 P107/AN7/KI3 P106/AN6/KI2 P105/AN5/KI1 P104/AN4/KI0 P103/AN3 P102/AN2 P101/AN1 AVSS P100/AN0 VREF AVcc P97/ADTRG
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1 23 45
M16C/30 Group
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
P44/CS0 P45/CS1 P46/CS2 P47/CS3 P50/WRL/WR P51/WRH/BHE P52/RD P53/BCLK P54/HLDA P55/HOLD P56/ALE P57/RDY/CLKOUT P60/CTS0/RTS0 P61/CLK0 P62/RxD0 P63/TXD0 P64/CTS1/RTS1/CLKS1 P65/CLK1 P66/RxD1 P67/TXD1
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
P96/ANEX1 P95/ANEX0 P94 P93 P92/TB2IN P91/TB1IN P90 BYTE CNVss P87/XCIN P86/XCOUT RESET XOUT VSS XIN VCC P85/NMI P84/INT2 P83/INT1 P82/INT0 P81 P80 P77 P76 P75/TA2IN P74/TA2OUT P73/CTS2/RTS2/TA1IN P72/CLK2/TA1OUT P71/RxD2/SCL/TA0IN (Note) P70/TXD2/SDA/TA0OUT (Note)
Note: P70 and P71 are N channel open-drain output pin.
Package: 100P6S-A
Figure 1.1.1. Pin configuration (top view)
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PIN CONFIGURATION (top view)
P13/D11 P14/D12 P15/D13 P16/D14 P17/D15 P20/A0(/D0/-) P21/A1(/D1/D0) P22/A2(/D2/D1) P23/A3(/D3/D2) P24/A4(/D4/D3) P25/A5(/D5/D4) P26/A6(/D6/D5) P27/A7(/D7/D6) Vss P30/A8(/-/D7) Vcc P31/A9 P32/A10 P33/A11 P34/A12 P35/A13 P36/A14 P37/A15 P40/A16 P41/A17
75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
P12/D10 P11/D9 P10/D8 P07/D7 P06/D6 P05/D5 P04/D4 P03/D3 P02/D2 P01/D1 P00/D0 P107/AN7/KI3 P106/AN6/KI2 P105/AN5/KI1 P104/AN4/KI0 P103/AN3 P102/AN2 P101/AN1 AVSS P100/AN0 VREF AVcc P97/ADTRG P96/ANEX1 P95/ANEX0
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 12 34567 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
M16C/30 Group
P42/A18 P43/A19 P44/CS0 P45/CS1 P46/CS2 P47/CS3 P50/WRL/WR P51/WRH/BHE P52/RD P53/BCLK P54/HLDA P55/HOLD P56/ALE P57/RDY/CLKOUT P60/CTS0/RTS0 P61/CLK0 P62/RxD0 P63/TXD0 P64/CTS1/RTS1/CLKS1 P65/CLK1 P66/RxD1 P67/TXD1 P70/TXD2/SDA/TA0OUT (Note) P71/RxD2/SCL/TA0IN (Note) P72/CLK2/TA1OUT
Note: P70 and P71 are N channel open-drain output pin.
P94 P93 P92/TB2IN P91/TB1IN P90 BYTE CNVss P87/XCIN P86/XCOUT RESET XOUT VSS XIN VCC P85/NMI P84/INT2 P83/INT1 P82/INT0 P81 P80 P77 P76 P75/TA2IN P74/TA2OUT P73/CTS2/RTS2/TA1IN
Package: 100P6Q-A
Figure 1.1.2. Pin configuration (top view)
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Block Diagram
Figure 1.1.3 is a block diagram of the M16C/30 group.
8
8
8
8
8
8
8
I/O ports
Port P0
Port P1
Port P2
Port P3
Port P4
Port P5
Port P6
Port P7
Internal peripheral functions
Timer Timer TA0 (16 bits) Timer TA1 (16 bits) Timer TA2 (16 bits) Timer TB1 (16 bits) Timer TB2 (16 bits)
A-D converter
(10 bits X 8 channels
Expandable up to 10 channels) UART/clock synchronous SI/O
System clock generator XIN-XOUT XCIN-XCOUT
8
Port P8
(8 bits X 3 channels)
7
Port P85
M16C/60 series16-bit CPU core
Registers Program counter PC Stack pointer ISP USP Vector table INTB Flag register FLG R0H R0L R0H R0L R1H R1L R1H R1L R2 R2 R3 R3 A0 A0 A1 A1 FB FB SB
Memory
ROM (Note 1) RAM (Note 2)
Watchdog timer
(15 bits)
Port P9
8
DMAC
(1 channel)
Port P10
Multiplier
8
Note 1: ROM size depends on MCU type. Note 2: RAM size depends on MCU type.
Figure 1.1.3. Block diagram of M16C/30 group
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Performance Outline
Table 1.1.1 is a performance outline of M16C/30 group. Table 1.1.1. Performance outline of M16C/30 group Item Number of basic instructions Shortest instruction execution time Memory capacity I/O port Input port Multifunction timer Serial I/O A-D converter ROM RAM P0 to P10 (except P85) P85 TA0, TA1, TA2 TB1, TB2 UART0, UART1, UART2 Performance 91 instructions 62.5ns(f(XIN)=16MHZ, VCC=5V) 100ns (f(XIN)=10MHZ, VCC=3V, with software one-wait) (See the figure 1.1.4. ROM Expansion) 2K to 3K bytes 8 bits x 10, 7 bits x 1 1 bit x 1 16 bits x 3 16 bits x 2 (UART or clock synchronous) x 3 10 bits x (8+2) channels 1 channels (trigger: 14 sources) 15 bits x 1 (with prescaler) 16 internal and 5 external sources, 4 software sources, 7 levels 2 built-in clock generation circuits (built-in feedback resistor, and external ceramic or quartz oscillator) 4.2V to 5.5V (f(XIN)=16MHZ, without software wait) 2.7V to 5.5V (f(XIN)=10MHZ with software one-wait) 25.5mW (f(XIN) = 10MHZ, VCC=3V with software one-wait) 5V 5mA Available (to a maximum of 1M bytes) CMOS high performance silicon gate 100-pin plastic mold QFP
DMAC Watchdog timer Interrupt Clock generating circuit Supply voltage Power consumption I/O I/O withstand voltage characteristics Output current Memory expansion Device configuration Package
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mitsubishi plans to release the following products in the M16C/30 group: (1) Support for mask ROM version (2) ROM capacity (3) Package 100P6S-A : Plastic molded QFP 100P6Q-A : Plastic molded QFP
ROM Size (Byte) 128K 96K 64K 32K M30302MC-XXXFP/GP M30302MA-XXXFP/GP M30302M8-XXXFP/GP M30302M4-XXXFP/GP Mask ROM version
Figure 1.1.4. ROM expansion The M16C/30 group products currently supported are listed in Table 1.1.2. Table 1.1.2. M16C/30 group
Type No. M30302M4-XXXFP M30302M4-XXXGP M30302M8-XXXFP M30302M8-XXXGP M30302MA-XXXFP M30302MA-XXXGP M30302MC-XXXFP M30302MC-XXXGP **: Under development * : New product ROM capacity RAM capacity Package type 100P6S-A 2K byte 64K byte 100P6Q-A 100P6S-A 100P6Q-A 96K byte 3K byte 128K byte 100P6S-A 100P6Q-A 100P6S-A 100P6Q-A Mask ROM version June, 2002 Remarks
** ** ** ** ** ** * *
32K byte
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Mitsubishi microcomputers
M16C / 30 Group Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Type No.
M30302 M 8 - XXX GP
Package type: FP : Package GP : ROM No. ROM capacity: 4 : 32K bytes 8 : 64K bytes A : 96K bytes C : 128K bytes Memory type: M : Mask ROM version Shows RAM capacity, pin count, etc (The value itself has no specific meaning) M16C/30 Group M16C Family 100P6S-A 100P6Q-A
Figure 1.1.5. Type No., memory size, and package
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Mitsubishi microcomputers
M16C / 30 Group Pin Description
Pin Description
Pin name VCC, VSS CNVSS Signal name Power supply input CNVSS Input I/O type Function Supply 2.7V to 5.5 V to the VCC pin. Supply 0 V to the VSS pin. This pin switches between processor modes. Connect this pin to the VSS pin when after a reset you want to start operation in single-chip mode (memory expansion mode) or the VCC pin when starting operation in microprocessor mode. A "L" on this input resets the microcomputer. These pins are provided for the main clock generating circuit.Connect a ceramic resonator or crystal between the XIN and the XOUT pins. To use an externally derived clock, input it to the XIN pin and leave the XOUT pin open. This pin selects the width of an external data bus. A 16-bit width is selected when this input is "L"; an 8-bit width is selected when this input is "H". This input must be fixed to either "H" or "L". Connect this pin to the VSS pin when not using external data bus. This pin is a power supply input for the A-D converter. Connect this pin to VCC. This pin is a power supply input for the A-D converter. Connect this pin to VSS. Input Input/output This pin is a reference voltage input for the A-D converter. This is an 8-bit CMOS I/O port. It has an input/output port direction register that allows the user to set each pin for input or output individually. When used for input in single-chip mode, the port can be set to have or not have a pull-up resistor in units of four bits by software. In memory expansion and microprocessor modes, selection of the internal pull-resistor is not available. When set as a separate bus, these pins input and output data (D0-D7). This is an 8-bit I/O port equivalent to P0. When set as a separate bus, these pins input and output data (D8-D15). This is an 8-bit I/O port equivalent to P0. These pins output 8 low-order address bits (A0-A7). If the external bus is set as an 8-bit wide multiplexed bus, these pins input and output data (D0-D7) and output 8 low-order address bits (A0-A7) separated in time by multiplexing. If the external bus is set as a 16-bit wide multiplexed bus, these pins input and output data (D0-D6) and output address (A1-A7) separated in time by multiplexing. They also output address (A0). This is an 8-bit I/O port equivalent to P0. These pins output 8 middle-order address bits (A8-A15). If the external bus is set as a 16-bit wide multiplexed bus, these pins input and output data (D7) and output address (A8) separated in time by multiplexing. They also output address (A9-A15). This is an 8-bit I/O port equivalent to P0. These pins output A16-A19 and CS0-CS3 signals. A16-A19 are 4 highorder address bits. CS0-CS3 are chip select signals used to specify an access space.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
RESET XIN XOUT
Reset input Clock input Clock output
Input Input Output
BYTE
External data bus width select input Analog power supply input Analog power supply input Reference voltage input I/O port P0
Input
AVCC AVSS
VREF P00 to P07
D0 to D7 P10 to P17 D8 to D15 P20 to P27 A0 to A7 A0/D0 to A7/D7 I/O port P2 I/O port P1
Input/output Input/output Input/output Input/output Output Input/output
A0 A1/D0 to A7/D6 P30 to P37 A8 to A15 A8/D7, A9 to A15 P40 to P47 A16 to A19, CS0 to CS3 I/O port P4 I/O port P3
Output Input/output
Input/output Output Input/output Output Input/output Output Output
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Mitsubishi microcomputers
M16C / 30 Group Pin Description
Pin Description
Pin name P50 to P57 Signal name I/O port P5 I/O type Input/output Function This is an 8-bit I/O port equivalent to P0. In single-chip mode, P57 in this port outputs a divide-by-8 or divide-by-32 clock of XIN or a clock of the same frequency as XCIN as selected by software. Output WRL, WRH (WR and BHE), RD, BCLK, HLDA, and ALE signals. WRL and WRH, and BHE and WR can be switched using software control. WRL, WRH, and RD selected With a 16-bit external data bus, data is written to even addresses when the WRL signal is "L" and to the odd addresses when the WRH signal is "L". Data is read when RD is "L". WR, BHE, and RD selected Data is written when WR is "L". Data is read when RD is "L". Odd addresses are accessed when BHE is "L". Use this mode when using an 8-bit external data bus. While the input level at the HOLD pin is "L", the microcomputer is placed in the hold state. While in the hold state, HLDA outputs a "L" level. ALE is used to latch the address. While the input level of the RDY pin is "L", the microcomputer is in the ready state. This is an 8-bit I/O port equivalent to P0. When used for input in singlechip, memory expansion, and microprocessor modes, the port can be set to have or not have a pull-up resistor in units of four bits by software. Pins in this port also function as UART0 and UART1 I/O pins as selected by software. This is an 8-bit I/O port equivalent to P6 (P70 and P71 are N channel open-drain output). Pins in this port also function as timer A0-A2, or UART2 I/O pins as selected by software. P80 to P84, P86, and P87 are I/O ports with the same functions as P6. Using software, they can be made to function as the I/O pins for the input pins for external interrupts. P86 and P87 can be set using software to function as the I/O pins for a sub clock generation circuit. In this case, connect a quartz oscillator between P86 (XCOUT pin) and P87 (XCIN pin). P85 is an input-only port that also functions for NMI. The NMI interrupt is generated when the input at this pin changes from "H" to "L". The NMI function cannot be cancelled using software. The pull-up cannot be set for this pin. This is an 8-bit I/O port equivalent to P6. Pins in this port also function as, timer B1, B2 input pins, A-D converter extended input pins, or A-D trigger input pins as selected by software. This is an 8-bit I/O port equivalent to P6. Pins in this port also function as A-D converter input pins as selected by software. Furthermore, P104 -P107 also function as input pins for the key input interrupt function.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
WRL / WR, WRH / BHE, RD, BCLK, HLDA, HOLD, ALE, RDY
Output Output Output Output Output Input Output Input
P60 to P67
I/O port P6
Input/output
P70 to P77
I/O port P7
Input/output
P80 to P84, P86, P87, P85
I/O port P8
Input/output Input/output Input/output
I/O port P85
Input
P90 to P97
I/O port P9
Input/output
P100 to P107
I/O port P10
Input/output
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Mitsubishi microcomputers
M16C / 30 Group Memory
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Operation of Functional Blocks
The M16C/30 group accommodates certain units in a single chip. These units include ROM and RAM to store instructions and data and the central processing unit (CPU) to execute arithmetic/logic operations. Also included are peripheral units such as timers, serial I/O, DMAC, A-D converter, and I/O ports. The following explains each unit.
Memory
Figure 1.3.1 is a memory map of the M16C/30 group. The address space extends the 1M bytes from address 0000016 to FFFFF16. From FFFFF16 down is ROM. For example, in the M30302MC-XXXGP, there is 128K bytes of internal ROM from E000016 to FFFFF16. The vector table for fixed interrupts such as _______ the reset and NMI are mapped to FFFDC16 to FFFFF16. The starting address of the interrupt routine is stored here. The address of the vector table for timer interrupts, etc., can be set as desired using the internal register (INTB). See the section on interrupts for details. From 0040016 up is RAM. For example, in the M30302MC-XXXGP, 3K bytes of internal RAM is mapped to the space from 0040016 to 00FFF16. In addition to storing data, the RAM also stores the stack used when calling subroutines and when interrupts are generated. The SFR area is mapped to 0000016 to 003FF16. This area accommodates the control registers for peripheral devices such as I/O ports, A-D converter, serial I/O, and timers, etc. Figures 1.6.1 to 1.6.3 are location of peripheral unit control registers. Any part of the SFR area that is not occupied is reserved and cannot be used for other purposes. The special page vector table is mapped to FFE0016 to FFFDB16. If the starting addresses of subroutines or the destination addresses of jumps are stored here, subroutine call instructions and jump instructions can be used as 2-byte instructions, reducing the number of program steps. In memory expansion mode and microprocessor mode, a part of the spaces are reserved and cannot be used. For example, in the M30302MC-XXXGP, the following spaces cannot be used. * The space between 0180016 and 03FFF16 (Memory expansion and microprocessor modes) * The space between D000016 and DFFFF16 (Memory expansion mode)
0000016
SFR area For details, see Figures 1.6.1 to 1.6.3 FFE0016
0040016
Internal RAM area
XXXXX16
RAM size 2K bytes 3K bytes Address XXXXX16 00BFF16 00FFF16
Internal reserved area (Note 1)
Special page vector table
0400016
External area
FFFDC16
Undefined instruction
Overflow
BRK instruction Address match Single step Watchdog timer DBC NMI Reset
ROM size 32K bytes 64K bytes 96K bytes 128K bytes
Address YYYYY16 F800016 F000016 E800016 E000016
D000016 YYYYY16
Internal reserved area (Note 2)
Internal ROM area
FFFFF16 FFFFF16
Note 1: During memory expansion and microprocessor modes, can not be used. Note 2: In memory expansion mode, can not be used.
Figure 1.3.1. Memory map
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Mitsubishi microcomputers
M16C / 30 Group CPU
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Central Processing Unit (CPU)
The CPU has a total of 13 registers shown in Figure 1.4.1. Seven of these registers (R0, R1, R2, R3, A0, A1, and FB) come in two sets; therefore, these have two register banks.
b15
b8 b7
b0
R0(Note)
H
L
b15
b8 b7
b0
b19
b0
R1(Note)
H
L Data registers
PC
Program counter
b15
b0
b19
b0
R2(Note)
INTB
H
L
Interrupt table register
b0
b15
b0
b15
R3(Note)
USP
User stack pointer
b15
b0
b15
b0
A0(Note) Address registers
ISP
Interrupt stack pointer
b15
b0
b15
b0
A1(Note)
SB
Static base register
b15
b0
b15
b0
FB(Note)
Frame base registers
FLG
Flag register
IPL
U
I OBS Z DC
Note: These registers consist of two register banks.
Figure 1.4.1. Central processing unit register
(1) Data registers (R0, R1, R1H, R2, and R3)
Data registers (R0, R1, R2, and R3) are configured with 16 bits, and are used primarily for transfer and arithmetic/logic operations. Register R0 can be used as separate 8-bit data registers, R0H and R0L. Register R1 can be used as separate 8-bit data registers, R1H and R1L. In some instructions, registers R2 and R0, as well as R3 and R1 can use as 32-bit data registers (R2R0 or R3R1).
(2) Address registers (A0 and A1)
Address registers (A0 and A1) are configured with 16 bits, and have functions equivalent to those of data registers. These registers can also be used for address register indirect addressing and address register relative addressing. In some instructions, registers A1 and A0 can be combined for use as a 32-bit address register (A1A0).
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Mitsubishi microcomputers
M16C / 30 Group CPU (3) Frame base register (FB)
Frame base register (FB) is configured with 16 bits, and is used for FB relative addressing.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) Program counter (PC)
Program counter (PC) is configured with 20 bits, indicating the address of an instruction to be executed.
(5) Interrupt table register (INTB)
Interrupt table register (INTB) is configured with 20 bits, indicating the start address of an interrupt vector table.
(6) Stack pointer (USP or ISP)
Stack pointer comes in two types: user stack pointer (USP) and interrupt stack pointer (ISP), each configured with 16 bits. Your desired type of stack pointer (USP or ISP) can be selected by a stack pointer select flag (U flag). This flag is located at the position of bit 7 in the flag register (FLG).
(7) Static base register (SB)
Static base register (SB) is configured with 16 bits, and is used for SB relative addressing.
(8) Flag register (FLG)
Flag register (FLG) is configured with 11 bits, each bit is used as a flag. Figure 1.4.2 shows the flag register (FLG). The following explains the function of each flag: * Bit 0: Carry flag (C flag) This flag retains a carry, borrow, or shift-out bit that has occurred in the arithmetic/logic unit. * Bit 1: Debug flag (D flag) This flag enables a single-step interrupt. When this flag is "1", a single-step interrupt is generated after instruction execution. This flag is cleared to "0" when the interrupt is acknowledged. * Bit 2: Zero flag (Z flag) This flag is set to "1" when an arithmetic operation resulted in 0; otherwise, cleared to "0". * Bit 3: Sign flag (S flag) This flag is set to "1" when an arithmetic operation resulted in a negative value; otherwise, cleared to "0". * Bit 4: Register bank select flag (B flag) This flag chooses a register bank. Register bank 0 is selected when this flag is "0" ; register bank 1 is selected when this flag is "1". * Bit 5: Overflow flag (O flag) This flag is set to "1" when an arithmetic operation resulted in overflow; otherwise, cleared to "0". * Bit 6: Interrupt enable flag (I flag) This flag enables a maskable interrupt. An interrupt is disabled when this flag is "0", and is enabled when this flag is "1". This flag is cleared to "0" when the interrupt is acknowledged.
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Mitsubishi microcomputers
M16C / 30 Group CPU
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Bit 7: Stack pointer select flag (U flag) Interrupt stack pointer (ISP) is selected when this flag is "0" ; user stack pointer (USP) is selected when this flag is "1". This flag is cleared to "0" when a hardware interrupt is acknowledged or an INT instruction of software interrupt Nos. 0 to 31 is executed. * Bits 8 to 11: Reserved area * Bits 12 to 14: Processor interrupt priority level (IPL) Processor interrupt priority level (IPL) is configured with three bits, for specification of up to eight processor interrupt priority levels from level 0 to level 7. If a requested interrupt has priority greater than the processor interrupt priority level (IPL), the interrupt is enabled. * Bit 15: Reserved area The C, Z, S, and O flags are changed when instructions are executed. See the software manual for details.
b15
b0
IPL
U
I
OBSZDC
Flag register (FLG)
Carry flag Debug flag Zero flag Sign flag Register bank select flag Overflow flag Interrupt enable flag Stack pointer select flag Reserved area Processor interrupt priority level Reserved area
Figure 1.4.2. Flag register (FLG)
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Mitsubishi microcomputers
M16C / 30 Group Reset Reset
There are two kinds of resets; hardware and software. In both cases, operation is the same after the reset. (See "Software Reset" for details of software resets.) This section explains on hardware resets. When the supply voltage is in the range where operation is guaranteed, a reset is effected by holding the reset pin level "L" (0.2VCC max.) for at least 20 cycles. When the reset pin level is then returned to the "H" level while main clock is stable, the reset status is cancelled and program execution resumes from the address in the reset vector table. The RAM is undefined at power on. The initial value must therefore be set. When a reset signal is applied while the CPU is writing a value to the RAM, the value may be set as unknown due to the termination of the CPU access. Figure 1.5.1 shows the example reset circuit. Figure 1.5.2 shows the reset sequence.
5V 4.0V VCC 0V 5V RESET 0.8V 0V Example when VCC = 5V. More than 20 cycles of XIN are needed.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
RESET
VCC
Figure 1.5.1. Example reset circuit
XIN More than 20 cycles are needed Microprocessor mode BYTE = "H" RESET BCLK 24cycles
BCLK Content of reset vector Address FFFFC16 FFFFD16 FFFFE16
RD
WR
CS0 Microprocessor mode BYTE = "L" Address FFFFC16 FFFFE16
Content of reset vector
RD
WR
CS0 Single chip mode Address FFFFC16 FFFFE16 Content of reset vector
Figure 1.5.2. Reset sequence
14
Mitsubishi microcomputers
M16C / 30 Group Reset
____________
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.5.1 shows the statuses of the other pins while the RESET pin level is "L". Figures 1.5.3 and 1.5.4 show the internal status of the microcomputer immediately after the reset is cancelled.
____________
Table 1.5.1. Pin status when RESET pin level is "L"
Status Pin name
P0 P1 P2, P3, P40 to P43 P44 P45 to P47 CNVSS = VCC CNVSS = VSS BYTE = VSS Input port (floating) Input port (floating) Input port (floating) Input port (floating) Input port (floating) Data input (floating) Data input (floating) Address output (undefined) CS0 output ("H" level is output) Input port (floating) (pull-up resistor is on) WR output ("H" level is output) BHE output (undefined) RD output ("H" level is output) BCLK output BYTE = VCC Data input (floating) Input port (floating) Address output (undefined) CS0 output ("H" level is output) Input port (floating) (pull-up resistor is on) WR output ("H" level is output) BHE output (undefined) RD output ("H" level is output) BCLK output
P50 P51 P52 P53 P54
Input port (floating) Input port (floating) Input port (floating) Input port (floating) Input port (floating)
HLDA output (The output value HLDA output (The output value depends on the input to the depends on the input to the HOLD pin) HOLD pin) HOLD input (floating) ALE output ("L" level is output) RDY input (floating) Input port (floating) HOLD input (floating) ALE output ("L" level is output) RDY input (floating) Input port (floating)
P55 P56 P57
Input port (floating) Input port (floating) Input port (floating)
P6, P7, P80 to P84, P86, P87, P9, P10 Input port (floating)
15
Mitsubishi microcomputers
M16C / 30 Group Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Processor mode register 0 (Note 1) (2) Processor mode register 1 (3) System clock control register 0 (4) System clock control register 1 (5) Chip select control register (6) Address match interrupt enable register (7) Protect register (8) Watchdog timer control register (9) Address match interrupt register 0
(000416)***
0016 0
(20) UART1 transmit interrupt control register (21) UART1 receive interrupt control register (22) Timer A0 interrupt control register (23) Timer A1 interrupt control register (24) Timer A2 interrupt control register (25) Timer B1 interrupt control register (26) Timer B2 interrupt control register (27) INT0 interrupt control register (28) INT1 interrupt control register (29) INT2 interrupt control register (30) Interrupt cause select register (31) UART2 special mode register 3 (Note 2) (32) UART2 special mode register 2 (33) UART2 special mode register (34) UART2 transmit/receive mode register
(005316)*** (005416)*** (005516)*** (005616)*** (005716)*** (005B16)*** (005C16)*** (005D16)*** (005E16)*** (005F16)*** (035F16)*** (037516)*** (037616)*** (037716)*** (037816)***
?000 ?000 ?000 ?000 ?000 ?000 ?000 00?000 00?000 00?000 0016 ? 0016 0016 0016
(000516)*** 0 0 0 0 0
(000616)*** 0 1 0 0 1 0 0 0 (000716)*** 0 0 1 0 0 0 0 0 (000816)*** 0 0 0 0 0 0 0 1 (000916)*** (000A16)*** 00 000
(000F16)*** 0 0 0 ? ? ? ? ? (001016)*** (001116)*** (001216)*** 0016 0016 0000 0016 0016 0000
(10) Address match interrupt register 1
(001416)*** (001516)*** (001616)***
(11) DMA0 control register (12) Bus collision detection interrupt control register (13) DMA0 interrupt control register (14) Key input interrupt control register (15) A-D conversion interrupt control register (16) UART2 transmit interrupt control register (17) UART2 receive interrupt control register (18) UART0 transmit interrupt control register (19) UART0 receive interrupt control register
(002C16)*** 0 0 0 0 0 ? 0 0 (004A16)*** (004B16)*** (004D16)*** (004E16)*** (004F16)*** (005016)*** (005116)*** (005216)*** ?000 ?000 ?000 ?000 ?000 ?000 ?000 ?000
(35) UART2 transmit/receive control register 0 (037C16)*** 0 0 0 0 1 0 0 0 (36) UART2 transmit/receive control register 1 (037D16)*** 0 0 0 0 0 0 1 0 (37) Count start flag (38) Clock prescaler reset flag (39) One-shot start flag (40) Trigger select flag (41) Up-down flag (038016)*** (038116)*** 0 (038216)*** 0 0 (038316)*** (038416)*** 00000 0016 0016 0016
x : Nothing is mapped to this bit ? : Undefined The content of other registers are undefined when the microcomputer is reset. The initial values must therefore be set. The RAM is undefined at power on. The initial values must therefore be set. When a reset signal is applied while the CPU is writing a value to the RAM, the value may be set as unknown due to the termination of the CPU access. Note 1: When the VCC level is applied to the CNVSS pin, it is 0316 at a reset. Note 2: "0016" is read out when set bit 7 (SDDS) of the UART2 special mode register ( address 037716) to "1".
Figure 1.5.3. Device's internal status after a reset is cleared
16
Mitsubishi microcomputers
M16C / 30 Group Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(42) Timer A0 mode register (43) Timer A1 mode register (44) Timer A2 mode register (45) Timer B1 mode register (46) Timer B2 mode register (47) UART0 transmit/receive mode register
(039616)*** (039716)*** (039816)*** (039C16)*** 0 0 ? (039D16)*** 0 0 ? (03A016)***
0016 0016 0016 0000 0000 0016
(62) Port P4 direction register (63) Port P5 direction register (64) Port P6 direction register (65) Port P7 direction register (66) Port P8 direction register (67) Port P9 direction register (68) Port P10 direction register (69) Pull-up control register 0 (70) Pull-up control register 1(Note) (71) Pull-up control register 2 (72) Port control register (73) Data registers (R0/R1/R2/R3) (74) Address registers (A0/A1) (75) Frame base register (FB) (76) Interrupt table register (INTB) (77) User stack pointer (USP) (78) Interrupt stack pointer (ISP) (79) Static base register (SB) (80) Flag register (FLG)
(03EA16)*** (03EB16)*** (03EE16)*** (03EF16)*** (03F216)*** 0 0 (03F316)*** (03F616)*** (03FC16)*** (03FD16)*** (03FE16)*** (03FF16)***
0016 0016 0016 0016 00000 0016 0016 0016 0016 0016 0016 000016 000016 000016 0000016 000016 000016 000016 000016
(48) UART0 transmit/receive control register 0 (03A416)*** 0 0 0 0 1 0 0 0 (49) UART0 transmit/receive control register 1 (03A516)*** 0 0 0 0 0 0 1 0 (50) UART1 transmit/receive mode register (03A816)*** 0016
(51) UART1 transmit/receive control register 0 (03AC16)*** 0 0 0 0 1 0 0 0 (52) UART1 transmit/receive control register 1 (03AD16)*** 0 0 0 0 0 0 1 0 (53) UART transmit/receive control register 2 (54) DMA0 cause select register (55) A-D control register 2 (56) A-D control register 0 (57) A-D control register 1 (58) Port P0 direction register (59) Port P1 direction register (60) Port P2 direction register (61) Port P3 direction register (03B016)*** (03B816)*** 0000000 0016
(03D416)*** 0 0 0 0 ? ? ? 0 (03D616)*** 0 0 0 0 0 ? ? ? (03D716)*** (03E216)*** (03E316)*** (03E616)*** (03E716)*** 0016 0016 0016 0016 0016
x : Nothing is mapped to this bit ? : Undefined The content of other registers are undefined when the microcomputer is reset. The initial values must therefore be set. The RAM is undefined at power on. The initial values must therefore be set. When a reset signal is applied while the CPU is writing a value to the RAM, the value may be set as unknown due to the termination of the CPU access. Note: When the VCC level is applied to the CNVSS pin, it is 0216 at a reset.
Figure 1.5.4. Device's internal status after a reset is cleared
17
Mitsubishi microcomputers
M16C / 30 Group SFR
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
000016 000116 000216 000316 000416 000516 000616 000716 000816 000916 000A16 000B16 000C16 000D16 000E16 000F16 001016 001116 001216 001316 001416 001516 001616 001716 001816 001916 001A16 001B16 001C16 001D16 001E16 001F16 002016 002116 002216 002316 002416 002516 002616 002716 002816 002916 002A16 002B16 002C16 002D16 002E16 002F16 003016 003116 003216 003316 003416 003516 003616 003716 003816 003916 003A16 003B16 003C16 003D16 003E16 003F16
004016 004116 004216 004316
Processor mode register 0 (PM0) Processor mode register 1(PM1) System clock control register 0 (CM0) System clock control register 1 (CM1) Chip select control register (CSR) Address match interrupt enable register (AIER) Protect register (PRCR)
004416 004516 004616 004716 004816 004916 004A16 004B16 Bus collision detection interrupt control register (BCNIC)
DMA0 interrupt control register (DM0IC) Key input interrupt control register (KUPIC) A-D conversion interrupt control register (ADIC)
UART2 transmit interrupt control register (S2TIC) UART2 receive interrupt control register (S2RIC) UART0 transmit interrupt control register (S0TIC) UART0 receive interrupt control register (S0RIC) UART1 transmit interrupt control register (S1TIC) UART1 receive interrupt control register (S1RIC)
Watchdog timer start register (WDTS) Watchdog timer control register (WDC) Address match interrupt register 0 (RMAD0)
004C16 004D16 004E16 004F16 005016 005116 005216
Address match interrupt register 1 (RMAD1)
005316 005416 005516 005616 005716 005816 005916 005A16 005B16 005C16 005D16 005E16
Timer A0 interrupt control register (TA0IC) Timer A1 interrupt control register (TA1IC) Timer A2 interrupt control register (TA2IC)
DMA0 source pointer (SAR0)
005F16 006016 006116 006216
Timer B1 interrupt control register (TB1IC) Timer B2 interrupt control register (TB2IC) INT0 interrupt control register (INT0IC) INT1 interrupt control register (INT1IC) INT2 interrupt control register (INT2IC)
DMA0 destination pointer (DAR0)
006316 006416 006516
DMA0 transfer counter (TCR0)
DMA0 control register (DM0CON)
032A16 032B16 032C16 032D16 032E16 032F16 033016 033116 033216 033316 033416 033516 033616 033716 033816 033916 033A16 033B16 033C16 033D16 033E16 033F16
Note : Locations in the SFR area where nothing is allocated are reserved areas. Do not access these areas for read or write.
Figure 1.6.1. Location of peripheral unit control registers (1)
18
Mitsubishi microcomputers
M16C / 30 Group SFR
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
034016 034116 034216 034316 034416 034516 034616 034716 034816 034916 034A16 034B16 034C16 034D16 034E16 034F16 035016 035116 035216 035316 035416 035516 035616 035716 035816 035916 035A16 035B16 035C16 035D16 035E16 035F16 036016 036116 036216 036316 036416 036516 036616 036716 036816 036916 036A16 036B16 036C16 036D16 036E16 036F16 037016 037116 037216 037316 037416 037516 037616 037716 037816 037916 037A16 037B16 037C16 037D16 037E16 037F16
038016 038116 038216 038316 038416 038516 038616 038716 038816 038916 038A16 038B16 038C16 038D16 038E16 038F16 039016 039116 039216 039316 039416 039516 039616 039716 039816 039916 039A16 039B16 039C16 039D16 039E16
Count start flag (TABSR) Clock prescaler reset flag (CPSRF) One-shot start flag (ONSF) Trigger select register (TRGSR) Up-down flag (UDF) Timer A0 register (TA0) Timer A1 register (TA1) Timer A2 register (TA2)
Timer B1 register (TB1) Timer B2 register (TB2) Timer A0 mode register (TA0MR) Timer A1 mode register (TA1MR) Timer A2 mode register (TA2MR)
Timer B1 mode register (TB1MR) Timer B2 mode register (TB2MR)
Interrupt cause select register (IFSR)
039F16 03A016 03A116 03A216 03A316 03A416 03A516 03A616 03A716 03A816 03A916 03AA16 03AB16 03AC16 03AD16 03AE16 03AF16 03B016 03B116 03B216 03B316 03B416
UART0 transmit/receive mode register (U0MR)
UART0 bit rate generator (U0BRG) UART0 transmit buffer register (U0TB)
UART0 transmit/receive control register 0 (U0C0) UART0 transmit/receive control register 1 (U0C1)
UART0 receive buffer register (U0RB)
UART1 transmit/receive mode register (U1MR)
UART1 bit rate generator (U1BRG) UART1 transmit buffer register (U1TB)
UART1 transmit/receive control register 0 (U1C0) UART1 transmit/receive control register 1 (U1C1)
UART1 receive buffer register (U1RB)
UART transmit/receive control register 2 (UCON)
UART2 special mode register 3(U2SMR3) UART2 special mode register 2(U2SMR2) UART2 special mode register (U2SMR)
UART2 transmit/receive mode register (U2MR) UART2 bit rate generator (U2BRG) UART2 transmit buffer register (U2TB) UART2 transmit/receive control register 0 (U2C0) UART2 transmit/receive control register 1 (U2C1) UART2 receive buffer register (U2RB)
03B516 03B616 03B716 03B816 03B916 03BA16 03BB16 03BC16 03BD16 03BE16 03BF16
DMA0 request cause select register (DM0SL)
Note : Locations in the SFR area where nothing is allocated are reserved areas. Do not access these areas for read or write.
Figure 1.6.2. Location of peripheral unit control registers (2)
19
Mitsubishi microcomputers
M16C / 30 Group SFR
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
03C016 03C116 03C216 03C316 03C416 03C516 03C616 03C716 03C816 03C916 03CA16 03CB16 03CC16 03CD16 03CE16 03CF16 03D016 03D116 03D216 03D316 03D416 03D516 03D616 03D716 03D816 03D916 03DA16 03DB16 03DC16 03DD16 03DE16 03DF16 03E016 03E116 03E216 03E316 03E416 03E516 03E616 03E716 03E816 03E916 03EA16 03EB16 03EC16 03ED16 03EE16 03EF16 03F016 03F116 03F216 03F316 03F416 03F516 03F616 03F716 03F816 03F916 03FA16 03FB16 03FC16 03FD16 03FE16 03FF16
A-D register 0 (AD0) A-D register 1 (AD1) A-D register 2 (AD2) A-D register 3 (AD3) A-D register 4 (AD4) A-D register 5 (AD5) A-D register 6 (AD6) A-D register 7 (AD7)
A-D control register 2 (ADCON2) A-D control register 0 (ADCON0) A-D control register 1 (ADCON1)
Port P0 register (P0) Port P1 register (P1) Port P0 direction register (PD0) Port P1 direction register (PD1) Port P2 register (P2) Port P3 register (P3) Port P2 direction register (PD2) Port P3 direction register (PD3) Port P4 register (P4) Port P5 register (P5) Port P4 direction register (PD4) Port P5 direction register (PD5) Port P6 register (P6) Port P7 register (P7) Port P6 direction register (PD6) Port P7 direction register (PD7) Port P8 register (P8) Port P9 register (P9) Port P8 direction register (PD8) Port P9 direction register (PD9) Port P10 register (P10) Port P10 direction register (PD10)
Pull-up control register 0 (PUR0) Pull-up control register 1 (PUR1) Pull-up control register 2 (PUR2) Port control register (PCR)
Note : Locations in the SFR area where nothing is allocated are reserved areas. Do not access these areas for read or write.
Figure 1.6.3. Location of peripheral unit control registers (3)
20
Mitsubishi microcomputers
M16C / 30 Group Software Reset Software Reset
Writing "1" to bit 3 of the processor mode register 0 (address 000416) applies a (software) reset to the microcomputer. A software reset has the same effect as a hardware reset. The contents of internal RAM are preserved.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Processor Mode (1) Types of Processor Mode
One of three processor modes can be selected: single-chip mode, memory expansion mode, and microprocessor mode. The functions of some pins, the memory map, and the access space differ according to the selected processor mode. * Single-chip mode In single-chip mode, only internal memory space (SFR, internal RAM, and internal ROM) can be accessed. However, after the reset has been released and the operation of shifting from the microprocessor mode has started ("H" applied to the CNVSS pin), the internal ROM area cannot be accessed even if the CPU shifts to the single-chip mode. Ports P0 to P10 can be used as programmable I/O ports or as I/O ports for the internal peripheral functions. * Memory expansion mode In memory expansion mode, external memory can be accessed in addition to the internal memory space (SFR, internal RAM, and internal ROM). However, after the reset has been released and the operation of shifting from the microprocessor mode has started ("H" applied to the CNVSS pin), the internal ROM area cannot be accessed even if the CPU shifts to the memory expansion mode. In this mode, some of the pins function as the address bus, the data bus, and as control signals. The number of pins assigned to these functions depends on the bus and register settings. (See "Bus Settings" for details.) * Microprocessor mode In microprocessor mode, the SFR, internal RAM, and external memory space can be accessed. The internal ROM area cannot be accessed. In this mode, some of the pins function as the address bus, the data bus, and as control signals. The number of pins assigned to these functions depends on the bus width and register settings. (See "Bus Settings" for details.)
(2) Setting Processor Modes
The processor mode is set using the CNVSS pin and the processor mode bits (bits 1 and 0 at address 000416). Do not set the processor mode bits to "102". Regardless of the level of the CNVSS pin, changing the processor mode bits selects the mode. Therefore, never change the processor mode bits when changing the contents of other bits. Do not change the processor mode bits simultaneously with other bits when changing the processor mode bits "012" or "112". Change the processor mode bits after changing the other bits. Also do not attempt to shift to or from the microprocessor mode within the program stored in the internal ROM area. * Applying VSS to CNVSS pin The microcomputer begins operation in single-chip mode after being reset. Memory expansion mode is selected by writing "012" to the processor mode bits. * Applying VCC to CNVSS pin The microcomputer starts to operate in microprocessor mode after being reset.
21
Mitsubishi microcomputers
M16C / 30 Group Processor Mode
Figure 1.7.1 shows the processor mode register 0 and 1. Figure 1.7.2 shows the memory maps in each processor modes.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Processor mode register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PM0
Address 000416
When reset 0016 (Note 2)
Bit symbol
PM00 PM01 PM02 PM03
Bit name
Processor mode bit
b1 b0
Function
0 0: Single-chip mode 0 1: Memory expansion mode 1 0: Must not be set 1 1: Microprocessor mode 0 : RD,BHE,WR 1 : RD,WRH,WRL The device is reset when this bit is set to "1". The value of this bit is "0" when read.
b5 b4
RW
R/W mode select bit Software reset bit
PM04 PM05 PM06
Multiplexed bus space select bit
0 0 : Multiplexed bus is not used 0 1 : Allocated to CS2 space 1 0 : Allocated to CS1 space 1 1 : Allocated to entire space (Note4)
Port P40 to P43 function select bit (Note 3) BCLK output disable bit
0 : Address output 1 : Port function (Address is not output) 0 : BCLK is output 1 : BCLK is not output (Pin is left floating)
PM07
Note 1: Set bit 1 of the protect register (address 000A16) to "1" when writing new values to this register. Note 2: If the VCC voltage is applied to the CNVSS, the value of this register when reset is 0316. (PM00 and PM01 both are set to "1".) Note 3: Valid in microprocessor and memory expansion modes. Note 4: If the entire space is of multiplexed bus in memory expansion mode, choose an 8bit width.The processor operates using the separate bus after reset is revoked, so the entire space multiplexed bus cannot be chosen in microprocessor mode. P31 to P37 become a port if the entire space multiplexed bus is chosen, so only 256 bytes can be used in each chip select.
Processor mode register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
00
00
0
Symbol PM1
Address 000516
When reset 00000XX02
Bit symbol
Reserved bit Nothing is assigned.
Bit name
Function
Must always be set to "0"
RW
In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
Reserved bit Reserved bit Reserved bit Reserved bit PM17 Wait bit Must always be set to "0" Must always be set to "0" Must always be set to "0" Must always be set to "0" 0 : No wait state 1 : Wait state inserted
Note: Set bit 1 of the protect register (address 000A16) to "1" when writing new values to this register.
Figure 1.7.1. Processor mode register 0 and 1
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Mitsubishi microcomputers
M16C / 30 Group Processor Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Single-chip mode
0000016
Memory expansion mode
SFR area Internal RAM area
Internally reserved area
Microprocessor mode
SFR area Internal RAM area
Internally reserved area
SFR area
0040016
Internal RAM area
XXXXX16
0400016
Inhibited
External area
Internally reserved area
External area
D000016 YYYYY16
Internal ROM area
FFFFF16
Internal ROM area
RAM size 2K bytes 3K bytes
Address XXXXX16 00BFF16 00FFF16
ROM size 32K bytes 64K bytes 96K bytes 128K bytes
Address YYYYY16 F800016 F000016 E800016 E000016
External area :
Accessing this area allows the user to access a device connected externally to the microcomputer.
Figure 1.7.2. Memory maps in each processor modes
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Mitsubishi microcomputers
M16C / 30 Group Bus Settings Bus Settings
The BYTE pin and bits 4 to 6 of the processor mode register 0 (address 000416) are used to change the bus settings. Table 1.8.1 shows the factors used to change the bus settings. Table 1.8.1. Factors for switching bus settings Bus setting Switching external address bus width Switching external data bus width Switching between separate and multiplex bus Switching factor Bit 6 of processor mode register 0 BYTE pin Bits 4 and 5 of processor mode register 0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Selecting external address bus width
The address bus width for external output in the 1M bytes of address space can be set to 16 bits (64K bytes address space) or 20 bits (1M bytes address space). When bit 6 of the processor mode register 0 is set to "1", the external address bus width is set to 16 bits, and P2 and P3 become part of the address bus. P40 to P43 can be used as programmable I/O ports. When bit 6 of processor mode register 0 is set to "0", the external address bus width is set to 20 bits, and P2, P3, and P40 to P43 become part of the address bus.
(2) Selecting external data bus width
The external data bus width can be set to 8 or 16 bits. (Note, however, that only the separate bus can be set.) When the BYTE pin is "L", the bus width is set to 16 bits; when "H", it is set to 8 bits. (The internal bus width is permanently set to 16 bits.) While operating, fix the BYTE pin either to "H" or to "L".
(3) Selecting separate/multiplex bus
The bus format can be set to multiplex or separate bus using bits 4 and 5 of the processor mode register 0. * Separate bus In this mode, the data and address are input and output separately. The data bus can be set using the BYTE pin to be 8 or 16 bits. When the BYTE pin is "H", the data bus is set to 8 bits and P0 functions as the data bus and P1 as a programmable I/O port. When the BYTE pin is "L", the data bus is set to 16 bits and P0 and P1 are both used for the data bus. When the separate bus is used for access, a software wait can be selected. * Multiplex bus In this mode, data and address I/O are time multiplexed. With the BYTE pin = "H", the 8 bits from D0 to D7 are multiplexed with A0 to A7. With the BYTE pin = "L", the 8 bits from D0 to D7 are multiplexed with A1 to A8. D8 to D15 are not multiplexed. In this case, the external devices connected to the multiplexed bus are mapped to the microcomputer's even addresses (every 2nd address). To access these external devices, access the even addresses as bytes. The ALE signal latches the address. It is output from P56. Before using the multiplex bus for access, be sure to insert a software wait. If the entire space is of multiplexed bus in memory expansion mode, choose an 8-bit width. The processor operates using the separate bus after reset is revoked, so the entire space multiplexed bus cannot be chosen in microprocessor mode. P31 to P37 become a port if the entire space multiplexed bus is chosen, so only 256 bytes can be used in each chip select.
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Mitsubishi microcomputers
M16C / 30 Group Bus Settings
Table 1.8.2. Pin functions for each processor mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Processor mode
Single-chip mode
Memory expansion mode/microprocessor modes
"01", "10" "00"
(separate bus)
Memory expansion mode
Multiplexed bus space select bit
Either CS1 or CS2 is for multiplexed bus and others are for separate bus
"11" (Note 1) multiplexed bus for the entire space 8 bit "H"
I/O port
Data bus width BYTE pin level P00 to P07 I/O port
8 bits "H"
Data bus
16 bits "L"
Data bus
8 bits "H"
Data bus
16 bits "L"
Data bus
P10 to P17 P20 P21 to P27 P30 P31 to P37 P40 to P43 Port P40 to P43 function select bit = 1 P40 to P43 Port P40 to P43 function select bit = 0 P44 to P47 P50 to P53 P54 P55
P56 P57
I/O port I/O port I/O port I/O port I/O port I/O port
I/O port
Data bus
I/O port Address bus Address bus Address bus Address bus I/O port
Data bus Address bus Address bus Address bus Address bus I/O port
I/O port Address bus /data bus Address bus /data bus A8/D7 I/O port I/O port
Address bus Address bus /data bus(Note 2) Address bus /data bus(Note 2) Address bus Address bus /data bus(Note 2)
Address bus
/data bus(Note 2)
Address bus I/O port
Address bus I/O port
I/O port
Address bus
Address bus
Address bus
Address bus
I/O port
I/O port I/O port I/O port I/O port
I/O port I/O port
CS (chip select) or programmable I/O port (For details, refer to "Bus control") Outputs RD, WRL, WRH, and BCLK or RD, BHE, WR, and BCLK (For details, refer to "Bus control") HLDA HOLD
ALE RDY
HLDA HOLD
ALE RDY
HLDA HOLD
ALE RDY
HLDA HOLD
ALE RDY
HLDA HOLD
ALE RDY
Note 1: If the entire space is of multiplexed bus in memory expansion mode, choose an 8-bit width. The processor operates using the separate bus after reset is revoked, so the entire space multiplexed bus cannot be chosen in microprocessor mode. P31 to P37 become a port if the entire space multiplexed bus is chosen, so only 256 bytes can be used in each chip select. Note 2: Address bus when in separate bus mode.
25
Mitsubishi microcomputers
M16C / 30 Group Bus Control Bus Control
The following explains the signals required for accessing external devices and software waits. The signals required for accessing the external devices are valid when the processor mode is set to memory expansion mode and microprocessor mode. The software waits are valid in all processor modes. (1) Address bus/data bus The address bus consists of the 20 pins A0 to A19 for accessing the 1M bytes of address space. The data bus consists of the pins for data I/O. When the BYTE pin is "H", the 8 ports D0 to D7 function as the data bus. When BYTE is "L", the 16 ports D0 to D15 function as the data bus. When a change is made from single-chip mode to memory expansion mode, the value of the address bus is undefined until external memory is accessed. (2) Chip select signal The chip select signal is output using the same pins as P44 to P47. Bits 0 to 3 of the chip select control register (address 000816) set each pin to function as a port or to output the chip select signal. The chip select control register is valid in memory expansion mode and microprocessor mode. In single-chip mode, P44 to P47 function as programmable I/O ports regardless of the value in the chip select control register. _______ In microprocessor mode, only CS0 outputs the chip select signal after the reset state has been can_______ _______ celled. CS1 to CS3 function as input ports. Figure 1.9.1 shows the chip select control register. The chip select signal can be used to split the external area into as many as four blocks. Tables 1.9.1 shows the external memory areas specified using the chip select signal. Table 1.9.1. External areas specified by the chip select signals
Processor mode CS0 3000016 to CFFFF16 (640K bytes) 3000016 to FFFFF16 (832K bytes)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Chip select signal
CS1 CS2 CS3
Memory expansion mode
Microprocessor mode
2800016 to 2FFFF16 (32K bytes)
0800016 to 27FFF16 (128K bytes)
0400016 to 07FFF16 (16K bytes)
26
Mitsubishi microcomputers
M16C / 30 Group Bus Control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Chip select control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol CSR
Address 000816
When reset 0116
Bit symbol
CS0 CS1 CS2 CS3 CS0W CS1W CS2W CS3W
Bit name
CS0 output enable bit CS1 output enable bit CS2 output enable bit CS3 output enable bit CS0 wait bit CS1 wait bit CS2 wait bit CS3 wait bit
Function
0 : Chip select output disabled (Normal port pin) 1 : Chip select output enabled
RW
0 : Wait state inserted 1 : No wait state
Figure 1.9.1. Chip select control register
The timing of the chip select signal changing to "L"(active) is synchronized with the address bus. But the timing of the chip select signal changing to "H" depends on the area which will be accessed in the next cycle. Figure 1.9.2 shows the output example of the address bus and chip select signal.
27
Mitsubishi microcomputers
M16C / 30 Group Bus Control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Example 1) After access the external area, both the address signal and the chip select signal change concurrently in the next cycle. In this example, after access to the external area(i), an access to the area indicated by the other chip select signal(j) will occur in the next cycle. In this case, both the address bus and the chip select signal change between the two cycles.
Example 2) After access the external area, only the chip select signal changes in the next cycle (the address bus does not change). In this example, an access to the internal ROM or the internal RAM in the next cycle will occur, after access to the external area. In this case, the chip select signal changes between the two cycles, but the address does not change.
Access to the Access to the Other External Area( i ) External Area( j )
Access to the External Area
Internal ROM/RAM Access
BCLK Read/Write signal Data bus Address bus Chip select (CS i) Chip select (CS j) Data Address
BCLK Read/Write signal Data bus Address bus Chip select Data Address
Example 3) After access the external area, only the address bus changes in the next cycle (the chip select signal does not change). In this example, after access to the external area(i), an access to the area indicated by the same chip select signal(i) will occur in the next cycle. In this case, the address bus changes between the two cycles, but the chip select signal does not change.
Example 4) After access the external area, either the address signal and the chip select signal do not change in the next cycle. In this example, any access to any area does not occur in the next cycle (either instruction prefetch does not occur). In this case,either the address bus and chip select signal do not change between the two cycles.
Access to the External Area( i )
Access to the Same External Area( i )
Access to the External Area
No Access
BCLK Read/Write signal Data bus Address bus Chip select (CS i) Data Address
BCLK Read/Write signal Data bus Address bus Chip select Data Address
Note : These examples show the address bus and chip select signal within the successive two cycles. According to the combination of these examples, the chip select can be elongated to over 2cycles.
Figure 1.9.2. Output Examples about Address Bus and Chip Select Signal (Separated Bus without Wait)
28
Mitsubishi microcomputers
M16C / 30 Group Bus Control (3) Read/write signals
With a 16-bit data bus (BYTE pin ="L"), bit 2 of the processor mode register 0 (address 000416) select the _____ ________ ______ _____ ________ _________ combinations of RD, BHE, and WR signals or RD, WRL, and WRH signals. With an 8-bit data bus (BYTE _____ ______ _______ pin = "H"), use the combination of RD, WR, and BHE signals. (Set bit 2 of the processor mode register 0 (address 000416) to "0".) Tables 1.9.3 and 1.9.4 show the operation of these signals. _____ ______ ________ After a reset has been cancelled, the combination of RD, WR, and BHE signals is automatically selected. _____ _________ _________ When switching to the RD, WRL, and WRH combination, do not write to external memory until bit 2 of the processor mode register 0 (address 000416) has been set (Note). Note: Before attempting to change the contents of the processor mode register 0, set bit 1 of the protect register (address 000A16) to "1".
_____ ________ _________
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.9.3. Operation of RD, WRL, and WRH signals
Data bus width 16-bit (BYTE = "L") RD L H H H WRL H L H L WRH H H L L Status of external data bus Read data Write 1 byte of data to even address Write 1 byte of data to odd address Write data to both even and odd addresses
_____
______
________
Table 1.9.4. Operation of RD, WR, and BHE signals
Data bus width RD H L H L H L H L WR L H L H L H L H BHE L L H H L L Not used Not used A0 H H L L L L H/L H/L Status of external data bus Write 1 byte of data to odd address Read 1 byte of data from odd address Write 1 byte of data to even address Read 1 byte of data from even address Write data to both even and odd addresses Read data from both even and odd addresses Write 1 byte of data Read 1 byte of data
16-bit (BYTE = "L")
8-bit (BYTE = "H")
(4) ALE signal
The ALE signal latches the address when accessing the multiplex bus space. Latch the address when the ALE signal falls.
When BYTE pin = "H" ALE D0/A0 to D7/A7 A8 to A19 Address Data (Note 1) When BYTE pin = "L" ALE A0 D0/A1 to D7/A8 Address (Note 2) A9 to A19 Address Address Address Data (Note 1)
Note 1: Floating when reading. Note 2: When multiplexed bus for the entire space is selected, these are I/O ports.
Figure 1.9.3. ALE signal and address/data bus
29
Mitsubishi microcomputers
M16C / 30 Group Bus Control
________
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(5) The RDY signal
________
RDY is a signal that facilitates access to an external device that requires long access time. As shown in ________ Figure 1.9.4, if an "L" is being input to the RDY at the BCLK falling edge, the bus turns to the wait state. If ________ an "H" is being input to the RDY pin at the BCLK falling edge, the bus cancels the wait state. Table 1.9.5 shows the state of the microcomputer with the bus in the wait state, and Figure 1.9.4 shows an example ____ ________ in which the RD signal is prolonged by the RDY signal. ________ The RDY signal is valid when accessing the external area during the bus cycle in which bits 4 to 7 of the ________ chip select control register (address 000816) are set to "0". The RDY signal is invalid when setting "1" to ________ all bits 4 to 7 of the chip select control register (address 000816), but the RDY pin should be treated as properly as in non-using. Table 1.9.5. Microcomputer status in wait state (Note) Item Oscillation
___ _____
Status On
________
R/W signal, address bus, data bus, CS __________ ALE signal, HLDA, programmable I/O ports Internal peripheral circuits
________
Maintain status when RDY signal received On
Note: The RDY signal cannot be received immediately prior to a software wait.
In an instance of separate bus
BCLK
RD CSi
(i=0 to 3)
RDY
tsu(RDY - BCLK)
Accept timing of RDY signal
In an instance of multiplexed bus
BCLK
RD CSi
(i=0 to 3)
RDY
tsu(RDY - BCLK)
: Wait using RDY signal : Wait using software
_____
Accept timing of RDY signal
________
Figure 1.9.4. Example of RD signal extended by RDY signal
30
Mitsubishi microcomputers
M16C / 30 Group Bus Control (6) Hold signal
The hold signal is used to transfer the bus privileges from the CPU to the external circuits. Inputting "L" to __________ the HOLD pin places the microcomputer in the hold state at the end of the current bus access. This status __________ __________ is maintained and "L" is output from the HLDA pin as long as "L" is input to the HOLD pin. Table 1.9.6 shows the microcomputer status in the hold state. __________ Bus-using priorities are given to HOLD, DMAC, and CPU in order of decreasing precedence.
__________
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
HOLD > DMAC > CPU
Figure 1.9.5. Bus-using priorities Table 1.9.6. Microcomputer status in hold state Item Oscillation
___ _____ _______
Status ON Floating Floating Maintains status when hold signal is received Output "L" ON (but watchdog timer stops) Undefined
R/W signal, address bus, data bus, CS, BHE Programmable I/O ports P0, P1, P2, P3, P4, P5 P6, P7, P8, P9, P10
__________
HLDA Internal peripheral circuits ALE signal
(7) External bus status when the internal area is accessed
Table 1.9.7 shows the external bus status when the internal area is accessed. Table 1.9.7. External bus status when the internal area is accessed
Item Address bus SFR accessed Address output Internal ROM/RAM accessed Maintain status before accessed address of external area Data bus When read When write RD, WR, WRL, WRH BHE Floating Output data RD, WR, WRL, WRH output BHE output Floating Undefined Output "H" Maintain status before accessed status of external area CS ALE Output "H" Output "L" Output "H" Output "L"
31
Mitsubishi microcomputers
M16C / 30 Group Bus Control (8) BCLK output
The user can choose the BCLK output by use of bit 7 of processor mode register 0 (000416) (Note). When set to "1", the output floating. Note: Before attempting to change the contents of the processor mode register 0, set bit 1 of the protect register (address 000A16) to "1".
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(9) Software wait
A software wait can be inserted by setting the wait bit (bit 7) of the processor mode register 1 (address 000516) (Note) and bits 4 to 7 of the chip select control register (address 000816). A software wait is inserted in the internal ROM/RAM area and in the external memory area by setting the wait bit of the processor mode register 1. When set to "0", each bus cycle is executed in one BCLK cycle. When set to "1", each bus cycle is executed in two or three BCLK cycles. After the microcomputer has been reset, this bit defaults to "0". When set to "1", a wait is applied to all memory areas (two or three BCLK cycles), regardless of the contents of bits 4 to 7 of the chip select control register. Set this bit after referring to the recommended operating conditions (main clock input oscillation frequency) of the electric character________ istics. However, when the user is using the RDY signal, the relevant bit in the chip select control register's bits 4 to 7 must be set to "0". When the wait bit of the processor mode register 1 is "0", software waits can be set independently for each of the 4 areas selected using the chip select signal. Bits 4 to 7 of the chip select control register _______ _______ correspond to chip selects CS0 to CS3. When one of these bits is set to "1", the bus cycle is executed in one BCLK cycle. When set to "0", the bus cycle is executed in two or three BCLK cycles. These bits default to "0" after the microcomputer has been reset. The SFR area is always accessed in two BCLK cycles regardless of the setting of these control bits. Also, insert a software wait if using the multiplex bus to access the external memory area. Table 1.9.8 shows the software wait and bus cycles. Figure 1.9.6 shows example of bus timing when using software waits. Note: Before attempting to change the contents of the processor mode register 1, set bit 1 of the protect register (address 000A16) to "1". Table 1.9.8. Software waits and bus cycles
Area SFR Internal ROM/RAM Separate bus Separate bus External memory area Separate bus Multiplex bus Multiplex bus Bus status Wait bit Invalid 0 1 0 0 1 0 1 Bits 4 to 7 of chip select control register Invalid Invalid Invalid 1 0 0 (Note) 0 0 (Note) Bus cycle 2 BCLK cycles 1 BCLK cycle 2 BCLK cycles 1 BCLK cycle 2 BCLK cycles 2 BCLK cycles 3 BCLK cycles 3 BCLK cycles
Note: When using the RDY signal, always set to "0".
32
Mitsubishi microcomputers
M16C / 30 Group Bus Control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
< Separate bus (no wait) >
Bus cycle (Note 1) Bus cycle (Note 1)
BCLK Write signal Read signal
Output Input
Data bus Address bus (Note 2) Chip select (Note 2)
Address
Address
< Separate bus (with wait) >
Bus cycle (Note 1)
Bus cycle (Note 1)
BCLK Write signal Read signal
Output Input
Data bus Address bus (Note 2) Chip select (Note 2)
Address
Address
< Multiplexed bus > Bus cycle (Note 1) Bus cycle (Note 1)
BCLK Write signal Read signal ALE Address bus (Note 2) Address bus/ Data bus Chip select (Note 2) Address Address Data output Address Address
Input
Note 1: These example timing charts indicate bus cycle length. After this bus cycle sometimes come read and write cycles in succession. Note 2: The address bus and chip select may be extended depending on the CPU status such as that of the instruction queue buffer.
Figure 1.9.6. Typical bus timings using software wait
33
Mitsubishi microcomputers
M16C / 30 Group Clock Generating Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Generating Circuit
The clock generating circuit contains two oscillator circuits that supply the operating clock sources to the CPU and internal peripheral units. Table 1.10.1. Main clock and sub-clock generating circuits Use of clock Main clock generating circuit Sub-clock generating circuit * CPU's operating clock source * CPU's operating clock source * Internal peripheral units' * Timer A/B's count clock operating clock source source Ceramic or crystal oscillator Crystal oscillator XIN, XOUT XCIN, XCOUT Available Available Oscillating Stopped Externally derived clock can be input
Usable oscillator Pins to connect oscillator Oscillation stop/restart function Oscillator status immediately after reset Other
Example of oscillator circuit
Figure 1.10.1 shows some examples of the main clock circuit, one using an oscillator connected to the circuit, and the other one using an externally derived clock for input. Figure 1.10.2 shows some examples of sub-clock circuits, one using an oscillator connected to the circuit, and the other one using an externally derived clock for input. Circuit constants in Figures 1.10.1 and 1.10.2 vary with each oscillator used. Use the values recommended by the manufacturer of your oscillator.
Microcomputer
(Built-in feedback resistor)
Microcomputer
(Built-in feedback resistor)
XIN
XOUT
(Note) Rd
XIN
XOUT Open
Externally derived clock
CIN COUT
Vcc Vss
Note: Insert a damping resistor if required. The resistance will vary depending on the oscillator and the oscillation drive capacity setting. Use the value recommended by the maker of the oscillator. When the oscillation drive capacity is set to low, check that oscillation is stable. Also, if the oscillator manufacturer's data sheet specifies that a feedback resistor be added external to the chip, insert a feedback resistor between XIN and XOUT following the instruction.
Figure 1.10.1. Examples of main clock
Microcomputer
(Built-in feedback resistor)
Microcomputer
(Built-in feedback resistor)
XCIN
XCOUT (Note) RCd
XCIN
XCOUT Open
Externally derived clock CCIN CCOUT Vcc Vss
Note: Insert a damping resistor if required. The resistance will vary depending on the oscillator and the oscillation drive capacity setting. Use the value recommended by the maker of the oscillator. When the oscillation drive capacity is set to low, check that oscillation is stable. Also, if the oscillator manufacturer's data sheet specifies that a feedback resistor be added external to the chip, insert a feedback resistor between XCIN and XCOUT following the instruction.
Figure 1.10.2. Examples of sub-clock
34
Mitsubishi microcomputers
M16C / 30 Group Clock Generating Circuit Clock Control
Figure 1.10.3 shows the block diagram of the clock generating circuit.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
XCIN CM04
XCOUT 1/32
fC32 f1 f1SIO2 fC fAD f8 f32 f8SIO2 f32SIO2
Sub clock CM10 "1" Write signal SQ XIN R RESET Software reset NMI Interrupt request level judgment output WAIT instruction Main clock CM02 CM05 XOUT b a c d Divider
CM07=0 BCLK fC CM07=1
SQ R
b a
1/2 1/2 1/2 1/2 1/2
c
CM06=0 CM17,CM16=11 CM06=1 CM06=0 CM17,CM16=10
d
CM06=0 CM17,CM16=01 CM06=0 CM17,CM16=00 CM0i : Bit i at address 000616 CM1i : Bit i at address 000716 WDCi : Bit i at address 000F16
Details of divider
Figure 1.10.3. Clock generating circuit
35
Mitsubishi microcomputers
M16C / 30 Group Clock Generating Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
The following paragraphs describes the clocks generated by the clock generating circuit.
(1) Main clock
The main clock is generated by the main clock oscillation circuit. After a reset, the clock is divided by 8 to the BCLK. The clock can be stopped using the main clock stop bit (bit 5 at address 000616). Stopping the clock, after switching the operating clock source of CPU to the sub-clock, reduces the power dissipation. After the oscillation of the main clock oscillation circuit has stabilized, the drive capacity of the main clock oscillation circuit can be reduced using the XIN-XOUT drive capacity select bit (bit 5 at address 000716). Reducing the drive capacity of the main clock oscillation circuit reduces the power dissipation. This bit changes to "1" when shifting from high-speed/medium-speed mode to stop mode and at a reset. When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained.
(2) Sub-clock
The sub-clock is generated by the sub-clock oscillation circuit. No sub-clock is generated after a reset. After oscillation is started using the port XC select bit (bit 4 at address 000616), the sub-clock can be selected as the BCLK by using the system clock select bit (bit 7 at address 000616). However, be sure that the sub-clock oscillation has fully stabilized before switching. After the oscillation of the sub-clock oscillation circuit has stabilized, the drive capacity of the sub-clock oscillation circuit can be reduced using the XCIN-XCOUT drive capacity select bit (bit 3 at address 000616). Reducing the drive capacity of the sub-clock oscillation circuit reduces the power dissipation. This bit changes to "1" when shifting to stop mode and at a reset. When the XCIN/XCOUT is used, set ports P86 and P87 as the input ports without pull-up.
(3) BCLK
The BCLK is the clock that drives the CPU, and is fC or the clock is derived by dividing the main clock by 1, 2, 4, 8, or 16. The BCLK is derived by dividing the main clock by 8 after a reset. The BCLK signal can be output from BCLK pin by the BCLK output disable bit (bit 7 at address 000416) in the memory expansion and the microprocessor modes. The main clock division select bit 0(bit 6 at address 000616) changes to "1" when shifting from highspeed/medium-speed to stop mode and at reset. When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained.
(4) Peripheral function clock(f1, f8, f32, f1SIO2, f8SIO2,f32SIO2,fAD)
The clock for the peripheral devices is derived from the main clock or by dividing it by 1, 8, or 32. The peripheral function clock is stopped by stopping the main clock or by setting the WAIT peripheral function clock stop bit (bit 2 at 000616) to "1" and then executing a WAIT instruction.
(5) fC32
This clock is derived by dividing the sub-clock by 32. It is used for the timer A and timer B counts.
(6) fC
This clock has the same frequency as the sub-clock. It is used for the BCLK and for the watchdog timer.
36
Mitsubishi microcomputers
M16C / 30 Group Clock Generating Circuit
Figure 1.10.4 shows the system clock control registers 0 and 1.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
System clock control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol CM0 Bit symbol
CM00 CM01 CM02 CM03 CM04 CM05 CM06 CM07
Address 000616 Bit name
Clock output function select bit (Valid only in single-chip mode) WAIT peripheral function clock stop bit
When reset 4816 Function
b1 b0
RW
0 0 : I/O port P57 0 1 : fC output 1 0 : f8 output 1 1 : f32 output 0 : Do not stop peripheral function clock in wait mode 1 : Stop peripheral function clock in wait mode (Note 8)
XCIN-XCOUT drive capacity 0 : LOW select bit (Note 2) 1 : HIGH Port XC select bit Main clock (XIN-XOUT) stop bit (Note 3, 4, 5) Main clock division select bit 0 (Note 7) System clock select bit (Note 6) 0 : I/O port 1 : XCIN-XCOUT generation (Note 9) 0 : On 1 : Off 0 : CM16 and CM17 valid 1 : Division by 8 mode 0 : XIN, XOUT 1 : XCIN, XCOUT
Note 1: Set bit 0 of the protect register (address 000A16) to "1" before writing to this register. Note 2: Changes to "1" when shiffing to stop mode and at a reset. Note 3: When entering low power dissipation mode, main clock stops by using this bit. To stop the main clock, when the sub clock oscillation is stable, set system clock select bit (CM07) to "1" before setting this bit to "1". Note 4: When inputting external clock, only clock oscillation buffer is stopped and clock input is acceptable. Note 5: If this bit is set to "1", XOUT turns "H". The built-in feedback resistor remains being connected, so XIN turns pulled up to XOUT ("H") via the feedback resistor. Note 6: Set port XC select bit (CM04) to "1" and stabilize the sub-clock oscillating before setting this bit from "0" to "1". Do not write to both bits at the same time. And also, set the main clock stop bit (CM05) to "0" and stabilize the main clock oscillating before setting this bit from "1" to "0". Note 7: This bit changes to "1" when shifting from high-speed/medium-speed mode to stop mode and at a reset. When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained. Note 8: fC32 is not included. Do not set to "1" when using low-speed or low power dissipation mode. Note 9: When the XCIN/XCOUT is used, set ports P86 and P87 as the input ports without pull-up.
System clock control register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
00
0
0
Symbol CM1 Bit symbol
CM10
Address 000716 Bit name
All clock stop control bit (Note4)
When reset 2016 Function
0 : Clock on 1 : All clocks off (stop mode) Must always be set to "0" Must always be set to "0" Must always be set to "0" Must always be set to "0" 0 : LOW 1 : HIGH
b7 b6
RW
Reserved bit Reserved bit Reserved bit Reserved bit CM15 CM16 CM17 XIN-XOUT drive capacity select bit (Note 2) Main clock division select bit 1 (Note 3)
0 0 : No division mode 0 1 : Division by 2 mode 1 0 : Division by 4 mode 1 1 : Division by 16 mode
Note 1: Set bit 0 of the protect register (address 000A16) to "1" before writing to this register. Note 2: This bit changes to "1" when shifting from high-speed/medium-speed mode to stop mode and at a reset. When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained. Note 3: Can be selected when bit 6 of the system clock control register 0 (address 000616) is "0". If "1", division mode is fixed at 8. Note 4: If this bit is set to "1", XOUT turns "H", and the built-in feedback resistor is cut off. XCIN and XCOUT turn highimpedance state.
Figure 1.10.4. Clock control registers 0 and 1
37
Mitsubishi microcomputers
M16C / 30 Group Clock Generating Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Output
In single-chip mode, the clock output function select bits (bits 0 and 1 at address 000616) enable f8, f32, or fc to be output from the P57/CLKOUT pin. When the WAIT peripheral function clock stop bit (bit 2 at address 000616) is set to "1", the output of f8 and f32 stops when a WAIT instruction is executed.
Stop Mode
Writing "1" to the all-clock stop control bit (bit 0 at address 000716) stops all oscillation and the microcomputer enters stop mode. In stop mode, the content of the internal RAM is retained provided that VCC remains above 2V. Because the oscillation , BCLK, f1 to f32, f1SIO2 to f32SIO2, fC, fC32, and fAD stops in stop mode, peripheral functions such as the A-D converter and watchdog timer do not function. However, timer A and timer B operate provided that the event counter mode is set to an external pulse, and UARTi(i = 0 to 2) functions provided an external clock is selected. Table 1.10.2 shows the status of the ports in stop mode. Stop mode is cancelled by a hardware reset or an interrupt. If an interrupt is to be used to cancel stop mode, that interrupt must first have been enabled, and the priority level of the interrupt which is not used to cancel must have been changed to 0. If returning by an interrupt, that interrupt routine is executed. If only a _______ hardware reset or an NMI interrupt is used to cancel stop mode, change the priority level of all interrupt to 0, then shift to stop mode. When shifting from high-speed/medium-speed mode to stop mode and at a reset, the main clock division select bit 0 (bit 6 at address 000616) is set to "1". When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained.
Table 1.10.2. Port status during stop mode Pin
_______ _______
Memory expansion mode Microprocessor mode Retains status before stop mode
Single-chip mode
Address bus, data bus, CS0 to CS3,
________
BHE
_____ ______ ________ _________
RD, WR, WRL, WRH
__________
"H" "H" "H" Retains status before stop mode Retains status before stop mode Valid only in single-chip mode "H" Valid only in single-chip mode Retains status before stop mode
HLDA, BCLK ALE Port CLKOUT When fc selected When f8, f32 selected
38
Mitsubishi microcomputers
M16C / 30 Group Wait Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Wait Mode
When a WAIT instruction is executed, the BCLK stops and the microcomputer enters the wait mode. In this mode, oscillation continues but the BCLK and watchdog timer stop. Writing "1" to the WAIT peripheral function clock stop bit and executing a WAIT instruction stops the clock being supplied to the internal peripheral functions, allowing power dissipation to be reduced. However, peripheral function clock fC32 does not stop so that the peripherals using fC32 do not contribute to the power saving. When the MCU running in low-speed or low power dissipation mode, do not enter WAIT mode with this bit set to "1". Table 1.10.3 shows the status of the ports in wait mode. Wait mode is cancelled by a hardware reset or an interrupt. If an interrupt is used to cancel wait mode, that interrupt must first have been enabled, and the priority level of the interrupt which is not used to cancel must have been changed to 0. If returning by an interrupt, the clock in which the WAIT instruction executed is set to BCLK by the microcomputer, and the action is resumed from the interrupt routine. If only a hardware _______ reset or an NMI interrupt is used to cancel wait mode, change the priority level of all interrupt to 0,then shift to wait mode. Table 1.10.3. Port status during wait mode Pin
_______ _______
Memory expansion mode Microprocessor mode Retains status before wait mode
Single-chip mode
Address bus, data bus, CS0 to CS3,
________
BHE
_____ ______ ________ _________
RD, WR, WRL, WRH
__________
"H"
HLDA,BCLK ALE Port CLKOUT
"H" "H" Retains status before wait mode When fC selected Valid only in single-chip mode When f8, f32 selected Valid only in single-chip mode
Retains status before wait mode Does not stop Does not stop when the WAIT peripheral function clock stop bit is "0". When the WAIT peripheral function clock stop bit is "1", the status immediately prior to entering wait mode is maintained.
39
Mitsubishi microcomputers
M16C / 30 Group Status Transition of BCLK
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Status Transition of BCLK
Power dissipation can be reduced and low-voltage operation achieved by changing the count source for BCLK. Table 1.10.4 shows the operating modes corresponding to the settings of system clock control registers 0 and 1. When reset, the device starts in division by 8 mode. The main clock division select bit 0(bit 6 at address 000616) changes to "1" when shifting from high-speed/medium-speed to stop mode and at a reset. When shifting from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained. The following shows the operational modes of BCLK.
(1) Division by 2 mode
The main clock is divided by 2 to obtain the BCLK.
(2) Division by 4 mode
The main clock is divided by 4 to obtain the BCLK.
(3) Division by 8 mode
The main clock is divided by 8 to obtain the BCLK. When reset, the device starts operating from this mode. Before the user can go from this mode to no division mode, division by 2 mode, or division by 4 mode, the main clock must be oscillating stably. When going to low-speed or lower power consumption mode, make sure the sub-clock is oscillating stably.
(4) Division by 16 mode
The main clock is divided by 16 to obtain the BCLK.
(5) No-division mode
The main clock is divided by 1 to obtain the BCLK.
(6) Low-speed mode
fC is used as the BCLK. Note that oscillation of both the main and sub-clocks must have stabilized before transferring from this mode to another or vice versa. At least 2 to 3 seconds are required after the subclock starts. Therefore, the program must be written to wait until this clock has stabilized immediately after powering up and after stop mode is cancelled.
(7) Low power dissipation mode
fC is the BCLK and the main clock is stopped. Note : Before the count source for BCLK can be changed from XIN to XCIN or vice versa, the clock to which the count source is going to be switched must be oscillating stably. Allow a wait time in software for the oscillation to stabilize before switching over the clock. Table 1.10.4. Operating modes dictated by settings of system clock control registers 0 and 1 CM17 CM16 CM07 CM06 CM05 CM04 Operating mode of BCLK 0 1 Invalid 1 0 Invalid Invalid 1 0 Invalid 1 0 Invalid Invalid 0 0 0 0 0 1 1 0 0 1 0 0 Invalid Invalid 0 0 0 0 0 0 1 Invalid Invalid Invalid Invalid Invalid 1 1 Division by 2 mode Division by 4 mode Division by 8 mode Division by 16 mode No-division mode Low-speed mode Low power dissipation mode
CM1i : Bit i of the address 000716 CM0i : Bit i of the address 000616
40
Mitsubishi microcomputers
M16C / 30 Group Power control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Power control
The following is a description of the three available power control modes:
Modes
Power control is available in three modes. (a) Normal operation mode * High-speed mode Divide-by-1 frequency of the main clock becomes the BCLK. The CPU operates with the BCLK. Each peripheral function operates according to its assigned clock. * Medium-speed mode Divide-by-2, divide-by-4, divide-by-8, or divide-by-16 frequency of the main clock becomes the BCLK. The CPU operates with the BCLK. Each peripheral function operates according to its assigned clock. * Low-speed mode fC becomes the BCLK. The CPU operates according to the fC clock. The fC clock is supplied by the subclock. Each peripheral function operates according to its assigned clock. * Low power dissipation mode The main clock operating in low-speed mode is stopped. The CPU operates according to the fC clock. The fC clock is supplied by the subclock. The only peripheral functions that operate are those with the subclock selected as the count source. (b) Wait mode The CPU operation is stopped. The oscillators do not stop. (c) Stop mode All oscillators stop. The CPU and all built-in peripheral functions stop. This mode, among the three modes listed here, is the most effective in decreasing power consumption. Figure 1.10.5 is the state transition diagram of the above modes.
41
Mitsubishi microcomputers
M16C / 30 Group Power control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Transition of stop mode, wait mode Reset
All oscillators stopped
WAIT instruction Interrupt WAIT instruction Interrupt WAIT instruction Interrupt
CPU operation stopped
Stop mode
All oscillators stopped
CM10 = "1" Interrupt Interrupt CM10 = "1"
Medium-speed mode (divided-by-8 mode)
Wait mode
CPU operation stopped
Stop mode
All oscillators stopped
High-speed/mediumspeed mode
Wait mode
CPU operation stopped
Stop mode
CM10 = "1" Interrupt
Low-speed/low power dissipation mode
Wait mode
Normal mode
(Refer to the following for the transition of normal mode.)
Transition of normal mode
Main clock is oscillating Sub clock is stopped Medium-speed mode (divided-by-8 mode)
CM06 = "1" BCLK : f(XIN)/8 CM07 = "0" CM06 = "1" CM04 = "1" (Notes 1, 3) CM07 = "0" (Note 1) CM06 = "1" CM04 = "0"
Main clock is oscillating CM04 = "0" Sub clock is oscillating High-speed mode
BCLK : f(XIN) CM07 = "0" CM06 = "0" CM17 = "0" CM16 = "0"
Medium-speed mode (divided-by-2 mode)
BCLK : f(XIN)/2 CM07 = "0" CM06 = "0" CM17 = "0" CM16 = "1"
Medium-speed mode (divided-by-8 mode)
BCLK : f(XIN)/8 CM07 = "0" CM06 = "1"
Main clock is oscillating Sub clock is oscillating Low-speed mode
CM07 = "0" (Note 1, 3) BCLK : f(XCIN) CM07 = "1" CM07 = "1" (Note 2)
Medium-speed mode (divided-by-4 mode)
BCLK : f(XIN)/4 CM07 = "0" CM06 = "0" CM17 = "1" CM16 = "0"
Medium-speed mode (divided-by-16 mode)
BCLK : f(XIN)/16 CM07 = "0" CM06 = "0" CM17 = "1" CM16 = "1"
CM05 = "0" CM04 = "0"
CM05 = "1"
Main clock is oscillating Sub clock is stopped
CM04 = "1"
High-speed mode
BCLK : f(XIN) CM07 = "0" CM06 = "0" CM17 = "0" CM16 = "0" CM06 = "0" (Notes 1,3)
Medium-speed mode (divided-by-2 mode)
BCLK : f(XIN)/2 CM07 = "0" CM06 = "0" CM17 = "0" CM16 = "1"
Main clock is stopped Sub clock is oscillating Low power dissipation mode
CM07 = "1" (Note 2) CM05 = "1" BCLK : f(XCIN) CM07 = "1" CM07 = "0" (Note 1) CM06 = "0" (Note 3) CM04 = "1"
Medium-speed mode (divided-by-4 mode)
BCLK : f(XIN)/4 CM07 = "0" CM06 = "0" CM17 = "1" CM16 = "0"
Medium-speed mode (divided-by-16 mode)
BCLK : f(XIN)/16 CM07 = "0" CM06 = "0" CM17 = "1" CM16 = "1"
Note 1: Switch clock after oscillation of main clock is sufficiently stable. Note 2: Switch clock after oscillation of sub clock is sufficiently stable. Note 3: Change CM06 after changing CM17 and CM16. Note 4: Transit in accordance with arrow.
Figure 1.10.5. State transition diagram of Power control mode
42
Mitsubishi microcomputers
M16C / 30 Group Protection
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Protection
The protection function is provided so that the values in important registers cannot be changed in the event that the program runs out of control. Figure 1.10.6 shows the protect register. The values in the processor mode register 0 (address 000416), processor mode register 1 (address 000516), system clock control register 0 (address 000616), system clock control register 1 (address 000716), port P9 direction register (address 03F316) can only be changed when the respective bit in the protect register is set to "1". Therefore, important outputs can be allocated to port P9. If, after "1" (write-enabled) has been written to the port P9 direction register write-enable bit (bit 2 at address 000A16), a value is written to any address, the bit automatically reverts to "0" (write-inhibited). However, the system clock control registers 0 and 1 write-enable bit (bit 0 at 000A16) and processor mode register 0 and 1 write-enable bit (bit 1 at 000A16) do not automatically return to "0" after a value has been written to an address. The program must therefore be written to return these bits to "0".
Protect register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PRCR Bit symbol
PRC0
Address 000A16 Bit name
When reset XXXXX0002 Function RW
Enables writing to system clock control registers 0 and 1 (addresses 0 : Write-inhibited 1 : Write-enabled 000616 and 000716) Enables writing to processor mode 0 : Write-inhibited registers 0 and 1 (addresses 000416 1 : Write-enabled and 000516) Enables writing to port P9 direction register (address 03F316) (Note) 0 : Write-inhibited 1 : Write-enabled
PRC1
PRC2
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
Note: Writing a value to an address after "1" is written to this bit returns the bit to "0" . Other bits do not automatically return to "0" and they must therefore be reset by the program.
Figure 1.10.6. Protect register
43
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Overview of Interrupt Type of Interrupts
Figure 1.11.1 lists the types of interrupts.
Software
Interrupt
Special
Hardware
Peripheral I/O (Note)
Note: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system. Figure 1.11.1. Classification of interrupts
* Maskable interrupt :
An interrupt which can be enabled (disabled) by the interrupt enable flag (I flag) or whose interrupt priority can be changed by priority level. * Non-maskable interrupt : An interrupt which cannot be enabled (disabled) by the interrupt enable flag (I flag) or whose interrupt priority cannot be changed by priority level.
44

Undefined instruction (UND instruction) Overflow (INTO instruction) BRK instruction INT instruction Reset NMI ________ DBC Watchdog timer Single step Address matched
_______

Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Interrupts
A software interrupt occurs when executing certain instructions. Software interrupts are non-maskable interrupts. * Undefined instruction interrupt An undefined instruction interrupt occurs when executing the UND instruction. * Overflow interrupt An overflow interrupt occurs when executing the INTO instruction with the overflow flag (O flag) set to "1". The following are instructions whose O flag changes by arithmetic: ABS, ADC, ADCF, ADD, CMP, DIV, DIVU, DIVX, NEG, RMPA, SBB, SHA, SUB * BRK interrupt A BRK interrupt occurs when executing the BRK instruction. * INT interrupt An INT interrupt occurs when specifying one of software interrupt numbers 0 through 63 and executing the INT instruction. Software interrupt numbers 0 through 31 are assigned to peripheral I/O interrupts, so executing the INT instruction allows executing the same interrupt routine that a peripheral I/ O interrupt does. The stack pointer (SP) used for the INT interrupt is dependent on which software interrupt number is involved. So far as software interrupt numbers 0 through 31 are concerned, the microcomputer saves the stack pointer assignment flag (U flag) when it accepts an interrupt request. If change the U flag to "0" and select the interrupt stack pointer (ISP), and then execute an interrupt sequence. When returning from the interrupt routine, the U flag is returned to the state it was before the acceptance of interrupt request. So far as software numbers 32 through 63 are concerned, the stack pointer does not make a shift.
45
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Hardware Interrupts
Hardware interrupts are classified into two types -- special interrupts and peripheral I/O interrupts. (1) Special interrupts Special interrupts are non-maskable interrupts. * Reset ____________ Reset occurs if an "L" is input to the RESET pin. _______ * NMI interrupt _______ _______ An NMI interrupt occurs if an "L" is input to the NMI pin. ________ * DBC interrupt This interrupt is exclusively for the debugger, do not use it in other circumstances. * Watchdog timer interrupt Generated by the watchdog timer. * Single-step interrupt This interrupt is exclusively for the debugger, do not use it in other circumstances. With the debug flag (D flag) set to "1", a single-step interrupt occurs after one instruction is executed. * Address match interrupt An address match interrupt occurs immediately before the instruction held in the address indicated by the address match interrupt register is executed with the address match interrupt enable bit set to "1". If an address other than the first address of the instruction in the address match interrupt register is set, no address match interrupt occurs. (2) Peripheral I/O interrupts A peripheral I/O interrupt is generated by one of built-in peripheral functions. Built-in peripheral functions are dependent on classes of products, so the interrupt factors too are dependent on classes of products. The interrupt vector table is the same as the one for software interrupt numbers 0 through 31 the INT instruction uses. Peripheral I/O interrupts are maskable interrupts. * Bus collision detection interrupt This is an interrupt that the serial I/O bus collision detection generates. * DMA0 interrupt This is an interrupts that DMA generates. * Key-input interrupt ___ A key-input interrupt occurs if an "L" is input to the KI pin. * A-D conversion interrupt This is an interrupt that the A-D converter generates. * UART0, UART1, UART2/NACK transmission interrupt These are interrupts that the serial I/O transmission generates. * UART0, UART1, UART2/ACK reception interrupt These are interrupts that the serial I/O reception generates. * Timer A0 interrupt through timer A2 interrupt These are interrupts that timer A generates * Timer B1, timer B2 interrupt These are interrupts that timer B generates. ________ ________ * INT0 interrupt through INT2 interrupt ______ ______ An INT interrupt occurs if either a rising edge or a falling edge or a both edge is input to the INT pin.
46
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupts and Interrupt Vector Tables
If an interrupt request is accepted, a program branches to the interrupt routine set in the interrupt vector table. Set the first address of the interrupt routine in each vector table. Figure 1.11.2 shows the format for specifying the address. Two types of interrupt vector tables are available -- fixed vector table in which addresses are fixed and variable vector table in which addresses can be varied by the setting.
MSB
LSB Low address Mid address 0000 0000 High address 0000
Vector address + 0 Vector address + 1 Vector address + 2 Vector address + 3
Figure 1.11.2. Format for specifying interrupt vector addresses
* Fixed vector tables The fixed vector table is a table in which addresses are fixed. The vector tables are located in an area extending from FFFDC16 to FFFFF16. One vector table comprises four bytes. Set the first address of interrupt routine in each vector table. Table 1.11.1 shows the interrupts assigned to the fixed vector tables and addresses of vector tables. Table 1.11.1. Interrupts assigned to the fixed vector tables and addresses of vector tables Interrupt source Undefined instruction Overflow BRK instruction Vector table addresses Address (L) to address (H) FFFDC16 to FFFDF16 FFFE016 to FFFE316 FFFE416 to FFFE716 Remarks Interrupt on UND instruction Interrupt on INTO instruction If the vector contains FF16, program execution starts from the address shown by the vector in the variable vector table There is an address-matching interrupt enable bit Do not use
Address match FFFE816 to FFFEB16 Single step (Note) FFFEC16 to FFFEF16 Watchdog timer FFFF016 to FFFF316 ________ DBC (Note) FFFF416 to FFFF716 Do not use _______ _______ NMI FFFF816 to FFFFB16 External interrupt by input to NMI pin Reset FFFFC16 to FFFFF16 Note: Interrupts used for debugging purposes only.
47
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Variable vector tables The addresses in the variable vector table can be modified, according to the user's settings. Indicate the first address using the interrupt table register (INTB). The 256-byte area subsequent to the address the INTB indicates becomes the area for the variable vector tables. One vector table comprises four bytes. Set the first address of the interrupt routine in each vector table. Table 1.11.2 shows the interrupts assigned to the variable vector tables and addresses of vector tables. Table 1.11.2. Interrupts assigned to the variable vector tables and addresses of vector tables
Software interrupt number Software interrupt number 0 Vector table address
Address (L) to address (H)
Interrupt source BRK instruction
Remarks Cannot be masked I flag
+0 to +3 (Note 1)
Software interrupt number 10 Software interrupt number 11
+40 to +43 (Note 1) +44 to +47 (Note 1)
Bus collision detection DMA0
Software interrupt number 13 Software interrupt number 14 Software interrupt number 15 Software interrupt number 16 Software interrupt number 17 Software interrupt number 18 Software interrupt number 19 Software interrupt number 20 Software interrupt number 21 Software interrupt number 22 Software interrupt number 23
+52 to +55 (Note 1) +56 to +59 (Note 1) +60 to +63 (Note 1) +64 to +67 (Note 1) +68 to +71 (Note 1) +72 to +75 (Note 1) +76 to +79 (Note 1) +80 to +83 (Note 1) +84 to +87 (Note 1) +88 to +91 (Note 1) +92 to +95 (Note 1)
Key input interrupt A-D UART2 transmit/NACK (Note 2) UART2 receive/ACK (Note 2) UART0 transmit UART0 receive UART1 transmit UART1 receive Timer A0 Timer A1 Timer A2
Software interrupt number 27 Software interrupt number 28 Software interrupt number 29 Software interrupt number 30 Software interrupt number 31 Software interrupt number 32 to Software interrupt number 63
+108 to +111 (Note 1) +112 to +115 (Note 1) +116 to +119 (Note 1) +120 to +123 (Note 1) +124 to +127 (Note 1) +128 to +131 (Note 1) to +252 to +255 (Note 1)
Timer B1 Timer B2 INT0 INT1 INT2
Software interrupt
Cannot be masked I flag
Note 1: Address relative to address in interrupt table register (INTB). Note 2: When IIC mode is selected, NACK and ACK interrupts are selected.
48
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt Control
Descriptions are given here regarding how to enable or disable maskable interrupts and how to set the priority to be accepted. What is described here does not apply to non-maskable interrupts. Enable or disable a maskable interrupt using the interrupt enable flag (I flag), interrupt priority level selection bit, or processor interrupt priority level (IPL). Whether an interrupt request is present or absent is indicated by the interrupt request bit. The interrupt request bit and the interrupt priority level selection bit are located in the interrupt control register of each interrupt. Also, the interrupt enable flag (I flag) and the IPL are located in the flag register (FLG). Figure 1.11.3 shows the memory map of the interrupt control registers.
49
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt control register (Note 2)
Symbol BCNIC DM0IC KUPIC ADIC SiTIC(i=0 to 2) SiRIC(i=0 to 2) TAiIC(i=0 to 2) TBiIC(i=1, 2) Address 004A16 004B16 004D16 004E16 005116, 005316, 004F16 005216, 005416, 005016 005516 to 005716 005B16, 005C16 When reset XXXXX0002 XXXXX0002 XXXXX0002 XXXXX0002 XXXXX0002 XXXXX0002 XXXXX0002 XXXXX0002
b7
b6
b5
b4
b3
b2
b1
b0
Bit symbol
ILVL0
Bit name
Interrupt priority level select bit
b2 b1 b0
Function
000: 001: 010: 011: 100: 101: 110: 111: Level 0 (interrupt disabled) Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7
R
W
ILVL1
ILVL2
IR
Interrupt request bit
0 : Interrupt not requested 1 : Interrupt requested
(Note 1)
Nothing is assigned.
In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
Note 1: This bit can only be accessed for reset (= 0), but cannot be accessed for set (= 1). Note 2: To rewrite the interrupt control register, do so at a point that does not generate the interrupt request for that register. For details, see the precautions for interrupts.
b7
b6
b5
b4
b3
b2
b1
b0
0
Symbol INTiIC(i=0 to 2)
Address 005D16 to 005F16
When reset XX00X0002
Bit symbol
ILVL0
Bit name
Interrupt priority level select bit
b2 b1 b0
Function
0 0 0 : Level 0 (interrupt disabled) 0 0 1 : Level 1 0 1 0 : Level 2 0 1 1 : Level 3 1 0 0 : Level 4 1 0 1 : Level 5 1 1 0 : Level 6 1 1 1 : Level 7 0: Interrupt not requested 1: Interrupt requested 0 : Selects falling edge 1 : Selects rising edge Must always be set to "0"
R
W
ILVL1
ILVL2
IR
Interrupt request bit
(Note 1)
POL
Polarity select bit
Reserved bit Nothing is assigned.
In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
Note 1: This bit can only be accessed for reset (= 0), but cannot be accessed for set (= 1). Note 2: To rewrite the interrupt control register, do so at a point that does not generate the interrupt request for that register. For details, see the precautions for interrupts.
Figure 1.11.3. Interrupt control registers
50
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt Enable Flag (I flag)
The interrupt enable flag (I flag) controls the enabling and disabling of maskable interrupts. Setting this flag to "1" enables all maskable interrupts; setting it to "0" disables all maskable interrupts. This flag is set to "0" after reset.
Interrupt Request Bit
The interrupt request bit is set to "1" by hardware when an interrupt is requested. After the interrupt is accepted and jumps to the corresponding interrupt vector, the request bit is set to "0" by hardware. The interrupt request bit can also be set to "0" by software. (Do not set this bit to "1").
Interrupt Priority Level Select Bit and Processor Interrupt Priority Level (IPL)
Set the interrupt priority level using the interrupt priority level select bit, which is one of the component bits of the interrupt control register. When an interrupt request occurs, the interrupt priority level is compared with the IPL. The interrupt is enabled only when the priority level of the interrupt is higher than the IPL. Therefore, setting the interrupt priority level to "0" disables the interrupt. Table 1.11.3 shows the settings of interrupt priority levels and Table 1.11.4 shows the interrupt levels enabled, according to the contents of the IPL. The following are conditions under which an interrupt is accepted: * interrupt enable flag (I flag) = "1" * interrupt request bit = "1" * interrupt priority level > IPL The interrupt enable flag (I flag), the interrupt request bit, the interrupt priority select bit, and the IPL are independent, and they are not affected by one another.
Table 1.11.3. Settings of interrupt priority levels
Interrupt priority level select bit
b2 b1 b0
Table 1.11.4. Interrupt levels enabled according to the contents of the IPL
IPL
IPL2 IPL1 IPL0
Interrupt priority level
Priority order
Enabled interrupt priority levels
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
Level 0 (interrupt disabled) Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 High Low
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
Interrupt levels 1 and above are enabled Interrupt levels 2 and above are enabled Interrupt levels 3 and above are enabled Interrupt levels 4 and above are enabled Interrupt levels 5 and above are enabled Interrupt levels 6 and above are enabled Interrupt levels 7 and above are enabled All maskable interrupts are disabled
51
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Rewrite the interrupt control register
To rewrite the interrupt control register, do so at a point that does not generate the interrupt request for that register. If there is possibility of the interrupt request occur, rewrite the interrupt control register after the interrupt is disabled. The program examples are described as follow:
Example 1:
INT_SWITCH1: FCLR I AND.B #00h, 0055h NOP NOP FSET I ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Four NOP instructions are required when using HOLD function. ; Enable interrupts.
Example 2:
INT_SWITCH2: FCLR I AND.B #00h, 0055h MOV.W MEM, R0 FSET I ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Dummy read. ; Enable interrupts.
Example 3:
INT_SWITCH3: PUSHC FLG FCLR I AND.B #00h, 0055h POPC FLG ; Push Flag register onto stack ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Enable interrupts.
The reason why two NOP instructions (four when using the HOLD function) or dummy read are inserted before FSET I in Examples 1 and 2 is to prevent the interrupt enable flag I from being set before the interrupt control register is rewritten due to effects of the instruction queue.
When changing an interrupt control register in a sate of interrupts being disabled, please read the following precautions on instructions used before changing the register. Changing a non-interrupt request bit If an interrupt request for an interrupt control register is generated during an instruction to rewrite the register is being executed, there is a case that the interrupt request bit is not set and consequently the interrupt is ignored. This will depend on the instruction. If this creates problems, use the below instructions to change the register. Instructions : AND, OR, BCLR, BSET Changing the interrupt request bit When attempting to clear the interrupt request bit of an interrupt control register, the interrupt request bit is not cleared sometimes. This will depend on the instruction. If this creates problems, use the below instructions to change the register. Instructions : MOV
52
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt Sequence
An interrupt sequence -- what are performed over a period from the instant an interrupt is accepted to the instant the interrupt routine is executed -- is described here. If an interrupt occurs during execution of an instruction, the processor determines its priority when the execution of the instruction is completed, and transfers control to the interrupt sequence from the next cycle. If an interrupt occurs during execution of either the SMOVB, SMOVF, SSTR or RMPA instruction, the processor temporarily suspends the instruction being executed, and transfers control to the interrupt sequence. In the interrupt sequence, the processor carries out the following in sequence given: (1) CPU gets the interrupt information (the interrupt number and interrupt request level) by reading address 0000016. After this, the corresponding interrupt request bit becomes "0". (2) Saves the content of the flag register (FLG) as it was immediately before the start of interrupt sequence in the temporary register (Note) within the CPU. (3) Sets the interrupt enable flag (I flag), the debug flag (D flag), and the stack pointer select flag (U flag) to "0" (the U flag, however does not change if the INT instruction, in software interrupt numbers 32 through 63, is executed) (4) Saves the content of the temporary register (Note) within the CPU in the stack area. (5) Saves the content of the program counter (PC) in the stack area. (6) Sets the interrupt priority level of the accepted instruction in the IPL. After the interrupt sequence is completed, the processor resumes executing instructions from the first address of the interrupt routine. Note: This register cannot be utilized by the user.
Interrupt Response Time
'Interrupt response time' is the period between the instant an interrupt occurs and the instant the first instruction within the interrupt routine has been executed. This time comprises the period from the occurrence of an interrupt to the completion of the instruction under execution at that moment (a) and the time required for executing the interrupt sequence (b). Figure 1.11.4 shows the interrupt response time.
Interrupt request generated
Interrupt request acknowledged
Time
Instruction
(a)
Interrupt sequence
(b)
Instruction in interrupt routine
Interrupt response time
(a) Time from interrupt request is generated to when the instruction then under execution is completed. (b) Time in which the instruction sequence is executed.
Figure 1.11.4. Interrupt response time
53
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Time (a) is dependent on the instruction under execution. Thirty cycles is the maximum required for the DIVX instruction (without wait). Time (b) is as shown in Table 1.11.5. Table 1.11.5. Time required for executing the interrupt sequence
Interrupt vector address Even Even Odd (Note 2) Odd (Note 2) Stack pointer (SP) value Even Odd Even Odd
________
16-Bit bus, without wait 18 cycles (Note 1) 19 cycles (Note 1) 19 cycles (Note 1) 20 cycles (Note 1)
8-Bit bus, without wait 20 cycles (Note 1) 20 cycles (Note 1) 20 cycles (Note 1) 20 cycles (Note 1)
Note 1: Add 2 cycles in the case of a DBC interrupt; add 1 cycle in the case either of an address match interrupt or of a single-step interrupt. Note 2: Locate an interrupt vector address in an even address, if possible.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BCLK Address bus Data bus R W The indeterminate segment is dependent on the queue buffer. If the queue buffer is ready to take an instruction, a read cycle occurs. Address 0000
Interrupt information
Indeterminate Indeterminate Indeterminate
SP-2 SP-2 contents
SP-4 SP-4 contents
vec vec contents
vec+2 vec+2 contents
PC
Figure 1.11.5. Time required for executing the interrupt sequence
Variation of IPL when Interrupt Request is Accepted
If an interrupt request is accepted, the interrupt priority level of the accepted interrupt is set in the IPL. If an interrupt request, that does not have an interrupt priority level, is accepted, one of the values shown in Table 1.11.6 is set in the IPL.
Table 1.11.6. Relationship between interrupts without interrupt priority levels and IPL Interrupt sources without priority levels
_______
Value set in the IPL 7 0 Not changed
Watchdog timer, NMI
Reset
Other
54
Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Saving Registers
In the interrupt sequence, only the contents of the flag register (FLG) and that of the program counter (PC) are saved in the stack area. First, the processor saves the four higher-order bits of the program counter, and 4 upper-order bits and 8 lower-order bits of the FLG register, 16 bits in total, in the stack area, then saves 16 lower-order bits of the program counter. Figure 1.11.6 shows the state of the stack as it was before the acceptance of the interrupt request, and the state the stack after the acceptance of the interrupt request. Save other necessary registers at the beginning of the interrupt routine using software. Using the PUSHM instruction alone can save all the registers except the stack pointer (SP).
Address MSB
Stack area LSB
Address MSB
Stack area LSB [SP] New stack pointer value
m-4 m-3 m-2 m-1 m m+1 Content of previous stack Content of previous stack [SP] Stack pointer value before interrupt occurs
m-4 m-3 m-2 m-1 m m+1
Program counter (PCL) Program counter (PCM) Flag register (FLGL) Flag register (FLGH) Program counter (PCH)
Content of previous stack Content of previous stack
Stack status before interrupt request is acknowledged
Stack status after interrupt request is acknowledged
Figure 1.11.6. State of stack before and after acceptance of interrupt request
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Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
The operation of saving registers carried out in the interrupt sequence is dependent on whether the content of the stack pointer (Note) , at the time of acceptance of an interrupt request, is even or odd. If the content of the stack pointer (Note) is even, the content of the flag register (FLG) and the content of the program counter (PC) are saved, 16 bits at a time. If odd, their contents are saved in two steps, 8 bits at a time. Figure 1.11.7 shows the operation of the saving registers. Note: When any INT instruction in software numbers 32 to 63 has been executed, this is the stack pointer indicated by the U flag. Otherwise, it is the interrupt stack pointer (ISP).
(1) Stack pointer (SP) contains even number
Address Stack area Sequence in which order registers are saved
[SP] - 5 (Odd) [SP] - 4 (Even) [SP] - 3(Odd) [SP] - 2 (Even) [SP] - 1(Odd) [SP] (Even) Finished saving registers in two operations. Program counter (PCL) Program counter (PCM) Flag register (FLGL) Flag register (FLGH) Program counter (PCH) (1) Saved simultaneously, all 16 bits (2) Saved simultaneously, all 16 bits
(2) Stack pointer (SP) contains odd number
Address Stack area Sequence in which order registers are saved
[SP] - 5 (Even) [SP] - 4(Odd) [SP] - 3 (Even) [SP] - 2(Odd) [SP] - 1 (Even) [SP] (Odd) Finished saving registers in four operations. Program counter (PCL) Program counter (PCM) Flag register (FLGL) Flag register (FLGH) Program counter (PCH)
(3) (4) (1) (2)
Saved simultaneously, all 8 bits
Note: [SP] denotes the initial value of the stack pointer (SP) when interrupt request is acknowledged. After registers are saved, the SP content is [SP] minus 4.
Figure 1.11.7. Operation of saving registers
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Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Returning from an Interrupt Routine
Executing the REIT instruction at the end of an interrupt routine returns the contents of the flag register (FLG) as it was immediately before the start of interrupt sequence and the contents of the program counter (PC), both of which have been saved in the stack area. Then control returns to the program that was being executed before the acceptance of the interrupt request, so that the suspended process resumes. Return the other registers saved by software within the interrupt routine using the POPM or similar instruction before executing the REIT instruction.
Interrupt Priority
If there are two or more interrupt requests occurring at a point in time within a single sampling (checking whether interrupt requests are made), the interrupt assigned a higher priority is accepted. Assign an arbitrary priority to maskable interrupts (peripheral I/O interrupts) using the interrupt priority level select bit. If the same interrupt priority level is assigned, however, the interrupt assigned a higher hardware priority is accepted. Priorities of the special interrupts, such as Reset (dealt with as an interrupt assigned the highest priority), watchdog timer interrupt, etc. are regulated by hardware. Figure 1.11.8 shows the priorities of hardware interrupts. Software interrupts are not affected by the interrupt priority. If an instruction is executed, control branches invariably to the interrupt routine.
_______
________
Reset > NMI > DBC > Watchdog timer > Peripheral I/O > Single step > Address match
Figure 1.11.8. Hardware interrupts priorities
Interrupt resolution circuit
When two or more interrupts are generated simultaneously, this circuit selects the interrupt with the highest priority level. Figure 1.11.9 shows the circuit that judges the interrupt priority level.
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Mitsubishi microcomputers
M16C / 30 Group Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Priority level of each interrupt Level 0 (initial value) INT1 Timer B2 Timer A1 INT2 INT0 Timer B1 Timer A2 UART1 reception UART0 reception UART2 reception/ACK A-D conversion Bus collision detection Timer A0 UART1 transmission UART0 transmission UART2 transmission/NACK Key input interrupt DMA0
High
Priority of peripheral I/O interrupts (if priority levels are same)
Low
Processor interrupt priority level (IPL)
Interrupt request level judgment output to clock generating circuit (Fig.1.10.3)
Interrupt enable flag (I flag) Address match Watchdog timer DBC NMI Reset
Interrupt request accepted
Figure 1.11.9. Maskable interrupts priorities (peripheral I/O interrupts)
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Mitsubishi microcomputers
______
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
INT Interrupt
______
INT Interrupt
________ ________
INT0 to INT2 are triggered by the edges of external inputs. The edge polarity is selected using the polarity select bit. As for external interrupt input, an interrupt can be generated both at the rising edge and at the falling edge by setting "1" in the INTi interrupt polarity switching bit of the interrupt request cause select register (035F16). To select both edges, set the polarity switching bit of the corresponding interrupt control register to `falling edge' ("0"). Figure 1.11.10 shows the Interrupt request cause select register.
Interrupt request cause select register
b7 b6 b5 b4 b3 b2 b1 b0
00
0
0
0
Symbol IFSR
Bit symbol
Address 035F16
When reset 0016
Bit name
INT0 interrupt polarity switching bit INT1 interrupt polarity switching bit INT2 interrupt polarity switching bit
Function
0 : One edge 1 : Two edges 0 : One edge 1 : Two edges 0 : One edge 1 : Two edges Must always be set to "0" Must always be set to "0" Must always be set to "0" Must always be set to "0" Must always be set to "0"
RW
IFSR0 IFSR1 IFSR2
Reserved bit Reserved bit Reserved bit Reserved bit Reserved bit
Figure 1.11.10. Interrupt request cause select register
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Mitsubishi microcomputers
________
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
NMI Interrupt
______
NMI Interrupt
______ ______ ______
An NMI interrupt is generated when the input to the P85/NMI pin changes from "H" to "L". The NMI interrupt is a non-maskable external interrupt. The pin level can be checked in the port P85 register (bit 5 at address 03F016). This pin cannot be used as a normal port input.
Key Input Interrupt
If the direction register of any of P104 to P107 is set for input and a falling edge is input to that port, a key input interrupt is generated. A key input interrupt can also be used as a key-on wakeup function for cancelling the wait mode or stop mode. However, if you intend to use the key input interrupt, do not use P104 to P107 as A-D input ports. Figure 1.11.11 shows the block diagram of the key input interrupt. Note that if an "L" level is input to any pin that has not been disabled for input, inputs to the other pins are not detected as an interrupt.
Port P104-P107 pull-up select bit
Pull-up transistor
Key input interrupt control register
Port P107 direction register
Port P107 direction register
(address 004D16)
P107/KI3
Pull-up transistor
Port P106 direction register
Interrupt control circuit
P106/KI2
Pull-up transistor
Key input interrupt request
Port P105 direction register
P105/KI1
Pull-up transistor
Port P104 direction register
P104/KI0
Figure 1.11.11. Block diagram of key input interrupt
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Mitsubishi microcomputers
M16C / 30 Group Address Match Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Address Match Interrupt
An address match interrupt is generated when the address match interrupt address register contents match the program counter value. Two address match interrupts can be set, each of which can be enabled and disabled by an address match interrupt enable bit. Address match interrupts are not affected by the interrupt enable flag (I flag) and processor interrupt priority level (IPL). For an address match interrupt, the value of the program counter (PC) that is saved to the stack area varies depending on the instruction being executed. Note that when using the external data bus in width of 8 bits, the address match interrupt cannot be used for external area. Figure 1.11.12 shows the address match interrupt-related registers.
Address match interrupt enable register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol AIER Bit symbol
Address 000916 Bit name Address match interrupt 0 enable bit Address match interrupt 1 enable bit
When reset XXXXXX002 Function 0 : Interrupt disabled 1 : Interrupt enabled 0 : Interrupt disabled 1 : Interrupt enabled RW
AIER0 AIER1
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminated.
Address match interrupt register i (i = 0, 1)
(b23) b7 (b19) b3 (b16)(b15) b0 b7 (b8) b0 b7 b0
Symbol RMAD0 RMAD1
Address 001216 to 001016 001616 to 001416
When reset X0000016 X0000016
Function Address setting register for address match interrupt
Values that can be set R W 0000016 to FFFFF16
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminated.
Figure 1.11.12. Address match interrupt-related registers
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Mitsubishi microcomputers
M16C / 30 Group Precautions for Interrupts
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Precautions for Interrupts (1) Reading address 0000016
* When maskable interrupt is occurred, CPU reads the interrupt information (the interrupt number and interrupt request level) in the interrupt sequence. The interrupt request bit of the certain interrupt written in address 0000016 will then be set to "0". Even if the address 0000016 is read out by software, "0" is set to the enabled highest priority interrupt source request bit. Therefore interrupt can be canceled and unexpected interrupt can occur. Do not read address 0000016 by software.
(2) Setting the stack pointer
* The value of the stack pointer immediately after reset is initialized to 000016. Accepting an interrupt before setting a value in the stack pointer may become a factor of runaway. Be sure to set a value in _______ the stack pointer before accepting an interrupt. When using the NMI interrupt, initialize the stack pointer at the beginning of a program. Concerning the first instruction immediately after reset, generat_______ ing any interrupts including the NMI interrupt is prohibited.
_______
(3) The NMI interrupt
_______ _______
*The NMI interrupt can not be disabled. Be sure to connect NMI pin to Vcc via a pull-up resistor if unused. Be sure to work on it. _______ * The NMI pin also serves as P85, which is exclusively input. Reading the contents of the P8 register allows reading the pin value. Use the reading of this pin only for establishing the pin level at the time _______ when the NMI interrupt is input. _______ * Do not attempt to go into stop mode with the input to the NMI pin being in the "L" state. With the input to _______ the NMI being in the "L" state, the CM10 is fixed to "0", so attempting to go into stop mode is turned down. _______ * Do not attempt to go into wait mode with the input to the NMI pin being in the "L" state. With the input to _______ the NMI pin being in the "L" state, the CPU stops but the oscillation does not stop, so no power is saved. In this instance, the CPU is returned to the normal state by a later interrupt. _______ * Signals input to the NMI pin require "L" level and "H" level of 2 clock +300ns or more, from the operation clock of the CPU.
(4) External interrupt
________
* Either an "L" level or an "H" level of at least 250 ns width is necessary for the signal input to pins INT0 ________ through INT2 regardless of the CPU operation clock. ________ ________ * When the polarity of the INT0 to INT2 pins is changed, the interrupt request bit is sometimes set to "1". After changing the polarity, set the interrupt request bit to "0". Figure 1.11.13 shows the procedure for ______ changing the INT interrupt generate factor.
Clear the interrupt enable flag to "0" (Disable interrupt)
Set the interrupt priority level to level 0 (Disable INTi interrupt)
Set the polarity select bit
NOP X 2
Clear the interrupt request bit to "0"
Set the interrupt priority level to level 1 to 7 (Enable the accepting of INTi interrupt request)
Set the interrupt enable flag to "1" (Enable interrupt) Note: Execute the setting above individually. Don't execute two or more settings at once(by one instruction).
______
Figure 1.11.13. Switching condition of INT interrupt request
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Mitsubishi microcomputers
M16C / 30 Group Precautions for Interrupts
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(5) Rewrite the interrupt control register
* To rewrite the interrupt control register, do so at a point that does not generate the interrupt request for that register. If there is possibility of the interrupt request occur, rewrite the interrupt control register after the interrupt is disabled. The program examples are described as follow:
Example 1:
INT_SWITCH1: FCLR I AND.B #00h, 0055h NOP NOP FSET I ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Four NOP instructions are required when using HOLD function. ; Enable interrupts.
Example 2:
INT_SWITCH2: FCLR I AND.B #00h, 0055h MOV.W MEM, R0 FSET I ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Dummy read. ; Enable interrupts.
Example 3:
INT_SWITCH3: PUSHC FLG FCLR I AND.B #00h, 0055h POPC FLG ; Push Flag register onto stack ; Disable interrupts. ; Clear TA0IC int. priority level and int. request bit. ; Enable interrupts.
The reason why two NOP instructions (four when using the HOLD function) or dummy read are inserted before FSET I in Examples 1 and 2 is to prevent the interrupt enable flag I from being set before the interrupt control register is rewritten due to effects of the instruction queue.
When changing an interrupt control register in a sate of interrupts being disabled, please read the following precautions on instructions used before changing the register. Changing a non-interrupt request bit If an interrupt request for an interrupt control register is generated during an instruction to rewrite the register is being executed, there is a case that the interrupt request bit is not set and consequently the interrupt is ignored. This will depend on the instruction. If this creates problems, use the below instructions to change the register. Instructions : AND, OR, BCLR, BSET Changing the interrupt request bit When attempting to clear the interrupt request bit of an interrupt control register, the interrupt request bit is not cleared sometimes. This will depend on the instruction. If this creates problems, use the below instructions to change the register. Instructions : MOV
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Mitsubishi microcomputers
M16C / 30 Group Watchdog Timer Watchdog Timer
The watchdog timer has the function of detecting when the program is out of control. Therefore, we recommend using the watchdog timer to improve reliability of a system. The watchdog timer is a 15-bit counter which down-counts the clock derived by dividing the BCLK using the prescaler. A watchdog timer interrupt is generated when an underflow occurs in the watchdog timer. When XIN is selected for the BCLK, bit 7 of the watchdog timer control register (address 000F16) selects the prescaler division ratio (by 16 or by 128). When XCIN is selected as the BCLK, the prescaler is set for division by 2 regardless of bit 7 of the watchdog timer control register (address 000F16). Thus the watchdog timer's period can be calculated as given below. The watchdog timer's period is, however, subject to an error due to the prescaler. With XIN chosen for BCLK Watchdog timer period = prescaler dividing ratio (16 or 128) X watchdog timer count (32768) BCLK With XCIN chosen for BCLK Watchdog timer period = prescaler dividing ratio (2) X watchdog timer count (32768) BCLK For example, suppose that BCLK runs at 16 MHz and that 16 has been chosen for the dividing ratio of the prescaler, then the watchdog timer's period becomes approximately 32.8 ms. The watchdog timer is initialized by writing to the watchdog timer start register (address 000E16) and when a watchdog timer interrupt request is generated. The prescaler is initialized only when the microcomputer is reset. After a reset is cancelled, the watchdog timer and prescaler are both stopped. The count is started by writing to the watchdog timer start register (address 000E16). In stop mode, wait mode and hold state, the watchdog timer and prescaler are stopped. Counting is resumed from the held value when the modes or state are released. Figure 1.12.1 shows the block diagram of the watchdog timer. Figure 1.12.2 shows the watchdog timerrelated registers.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Prescaler
"CM07 = 0" "WDC7 = 0"
1/16
BCLK HOLD
1/128
"CM07 = 0" "WDC7 = 1"
Watchdog timer
Watchdog timer interrupt request
"CM07 = 1"
1/2
Write to the watchdog timer start register (address 000E16)
Set to "7FFF16"
RESET
Figure 1.12.1. Block diagram of watchdog timer
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Mitsubishi microcomputers
M16C / 30 Group Watchdog Timer
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Watchdog timer control register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol WDC
Bit symbol
Address 000F16
Bit name
When reset 000XXXXX2
Function RW
High-order bit of watchdog timer
Reserved bit Reserved bit
WDC7
Must always be set to "0" Must always be set to "0"
Prescaler select bit
0 : Divided by 16 1 : Divided by 128
Watchdog timer start register
b7 b0
Symbol WDTS
Address 000E16
When reset Indeterminate
RW
Function The watchdog timer is initialized and starts counting after a write instruction to this register. The watchdog timer value is always initialized to "7FFF16" regardless of whatever value is written.
Figure 1.12.2. Watchdog timer control and start registers
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAC
This microcomputer has one DMAC (direct memory access controller) channel that allow data to be sent to memory without using the CPU. DMAC shares the same data bus with the CPU. The DMAC is given a higher right of using the bus than the CPU, which leads to working the cycle stealing method. On this account, the operation from the occurrence of DMA transfer request signal to the completion of 1-word (16bit) or 1-byte (8-bit) data transfer can be performed at high speed. Figure 1.13.1 shows the block diagram of the DMAC. Table 1.13.1 shows the DMAC specifications. Figures 1.13.2 to 1.13.4 show the registers used by the DMAC.
Address bus
DMA0 source pointer SAR0(20) (addresses 002216 to 002016) DMA0 destination pointer DAR0 (20)
DMA0 transfer counter reload register TCR0 (16) (addresses 002616 to 002416)
(addresses 002916, 002816) DMA0 transfer counter TCR0 (16)
DMA0 forward address pointer (20) (Note)
DMA latch high-order bits DMA latch low-order bits
Data bus low-order bits Data bus high-order bits Note: Pointer is incremented by a DMA request.
Figure 1.13.1. Block diagram of DMAC
Either a write signal to the software DMA request bit or an interrupt request signal is used as a DMA transfer request signal. But the DMA transfer is affected neither by the interrupt enable flag (I flag) nor by the interrupt priority level. The DMA transfer doesn't affect any interrupts either. If the DMAC is active (the DMA enable bit is set to 1), data transfer starts every time a DMA transfer request signal occurs. If the cycle of the occurrences of DMA transfer request signals is higher than the DMA transfer cycle, there can be instances in which the number of transfer requests doesn't agree with the number of transfers. For details, see the description of the DMA request bit.
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Mitsubishi microcomputers
M16C / 30 Group DMAC
Table 1.13.1. DMAC specifications Item No. of channels Transfer memory space Specification 2 (cycle steal method) * From any address in the 1M bytes space to a fixed address * From a fixed address to any address in the 1M bytes space * From a fixed address to a fixed address (Note that DMA-related registers [002016 to 003F16] cannot be accessed) 128K bytes (with 16-bit transfers) or 64K bytes (with 8-bit transfers)
________
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Maximum No. of bytes transferred DMA request factors (Note)
Falling edge of INT0 or both edge Timer A0 to timer A2 interrupt requests Timer B1 and timer B2 interrupt requests UART0 transfer and reception interrupt requests UART1 transfer and reception interrupt requests UART2 transfer and reception interrupt requests A-D conversion interrupt requests Software triggers Transfer unit 8 bits or 16 bits Transfer address direction forward/fixed (forward direction cannot be specified for both source and destination simultaneously) Transfer mode * Single transfer mode After the transfer counter underflows, the DMA enable bit turns to "0", and the DMAC turns inactive * Repeat transfer mode After the transfer counter underflows, the value of the transfer counter reload register is reloaded to the transfer counter. The DMAC remains active unless a "0" is written to the DMA enable bit. DMA interrupt request generation timing When an underflow occurs in the transfer counter Active When the DMA enable bit is set to "1". When the DMAC is active, data transfer starts every time a DMA transfer request signal occurs. Inactive * When the DMA enable bit is set to "0". At the time of starting data transfer immediately after turning the DMAC active, the Reload timing for forward value of one of source pointer and destination pointer - the one specified for the address pointer and transfer forward direction - is reloaded to the forward direction address pointer, and the value counter of the transfer counter reload register is reloaded to the transfer counter. Writing to register Registers specified for forward direction transfer are always write enabled. Registers specified for fixed address transfer are write-enabled when the DMA enable bit is "0". Reading the register Can be read at any time. However, when the DMA enable bit is "1", reading the register set up as the forward register is the same as reading the value of the forward address pointer. Note: DMA transfer is not effective to any interrupt. DMA transfer is affected neither by the interrupt enable flag (I flag) nor by the interrupt priority level.
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMA0 request cause select register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol DM0SL
Address 03B816
When reset 0016
Bit symbol
Bit name DMA request cause select bit
b6 b5 b4 b3 b2 b1 b0
(DMS)
Function
R
W
DSEL0 DSEL1 DSEL2 DSEL3 DSEL4 DSEL5 DMS
0 0 0 0 0 0 0 : Falling edge of INT0 pin 0 0 0 0 0 0 1 : Software trigger 0 0 0 0 0 1 0 : Timer A0 0 0 0 0 0 1 1 : Timer A1 0 0 0 0 1 0 0 : Timer A2 0 0 0 0 1 0 1 : Must not be set 0 0 0 0 1 1 0 : Must not be set 0 0 0 0 1 1 1 : Must not be set 0 0 0 1 0 0 0 : Timer B1 0 0 0 1 0 0 1 : Timer B2 0 0 0 1 0 1 0 : UART0 transmit 0 0 0 1 0 1 1 : UART0 receive 0 0 0 1 1 0 0 : UART2 transmit 0 0 0 1 1 0 1 : UART2 receive 0 0 0 1 1 1 0 : A-D conversion 0 0 0 1 1 1 1 : UART1 transmit 1 0 0 0 1 1 0 : Two edges of INT0 pin Must not be set except the above.
DSR
Software DMA request bit
If software trigger is selected, a DMA request is generated by setting this bit to "1" (When read, the value of this bit is always "0")
Figure 1.13.2. DMAC register (1)
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMA0 control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol DM0CON
Address 002C16
When reset 00000X002
Bit symbol DMBIT DMASL DMAS DMAE DSD DAD
Bit name Transfer unit bit select bit Repeat transfer mode select bit DMA request bit (Note 1) DMA enable bit Source address direction select bit (Note 3) 0 : 16 bits 1 : 8 bits
Function
R
W
0 : Single transfer 1 : Repeat transfer 0 : DMA not requested 1 : DMA requested 0 : Disabled 1 : Enabled 0 : Fixed 1 : Forward
(Note 2)
Destination address 0 : Fixed direction select bit (Note 3) 1 : Forward
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
Note 1: DMA request can be cleared by resetting the bit. Note 2: This bit can only be set to "0". Note 3: Source address direction select bit and destination address direction select bit cannot be set to "1" simultaneously.
Figure 1.13.3. DMAC register (2)
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMA0 source pointer
(b23) b7 (b19) b3 (b16)(b15) b0 b7 (b8) b0 b7 b0
Symbol SAR0
Address 002216 to 002016
When reset Indeterminate
Function * Source pointer Stores the source address
Transfer address specification 0000016 to FFFFF16
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
DMA0 destination pointer
(b23) b7 (b19) b3 (b16)(b15) b0 b7 (b8) b0 b7 b0
Symbol DAR0
Address 002616 to 002416
When reset Indeterminate
Function * Destination pointer Stores the destination address
Transfer address specification 0000016 to FFFFF16
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
DMA0 transfer counter
(b15) b7 (b8) b0 b7 b0
Symbol TCR0
Address 002916, 002816
When reset Indeterminate
Function * Transfer counter Set a value one less than the transfer count
Transfer count specification 000016 to FFFF16
RW
Figure 1.13.4. DMAC register (3)
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Mitsubishi microcomputers
M16C / 30 Group DMAC (1) Transfer cycle
The transfer cycle consists of the bus cycle in which data is read from memory or from the SFR area (source read) and the bus cycle in which the data is written to memory or to the SFR area (destination write). The number of read and write bus cycles depends on the source and destination addresses. In memory expansion mode and microprocessor mode, the number of read and write bus cycles also depends on the level of the BYTE pin. Also, the bus cycle itself is longer when software waits are inserted. (a) Effect of source and destination addresses When 16-bit data is transferred on a 16-bit data bus, and the source and destination both start at odd addresses, there are one more source read cycle and destination write cycle than when the source and destination both start at even addresses. (b) Effect of BYTE pin level When transferring 16-bit data over an 8-bit data bus (BYTE pin = "H") in memory expansion mode and microprocessor mode, the 16 bits of data are sent in two 8-bit blocks. Therefore, two bus cycles are required for reading the data and two are required for writing the data. Also, in contrast to when the CPU accesses internal memory, when the DMAC accesses internal memory (internal ROM, internal RAM, and SFR), these areas are accessed using the data size selected by the BYTE pin. (c) Effect of software wait When the SFR area or a memory area with a software wait is accessed, the number of cycles is increased for the wait by 1 bus cycle. The length of the cycle is determined by BCLK. Figure 1.13.5 shows the example of the transfer cycles for a source read. For convenience, the destination write cycle is shown as one cycle and the source read cycles for the different conditions are shown. In reality, the destination write cycle is subject to the same conditions as the source read cycle, with the transfer cycle changing accordingly. When calculating the transfer cycle, remember to apply the respective conditions to both the destination write cycle and the source read cycle. For example (2) in Figure 1.13.5, if data is being transferred in 16-bit units on an 8-bit bus, two bus cycles are required for both the source read cycle and the destination write cycle.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) 8-bit transfers 16-bit transfers and the source address is even.
BCLK Address bus RD signal WR signal Data bus
CPU use Source Destination Dummy cycle CPU use CPU use Source Destination Dummy cycle CPU use
(2) 16-bit transfers and the source address is odd Transferring 16-bit data on an 8-bit data bus (In this case, there are also two destination cycles).
BCLK Address bus RD signal WR signal Data bus
CPU use Source Source + 1 Destination Dummy cycle CPU use CPU use Source Source + 1 Destination Dummy cycle CPU use
(3) One wait is inserted into the source read under the conditions in (1)
BCLK Address bus RD signal WR signal Data bus
CPU use Source Destination Dummy cycle CPU use CPU use Source Destination Dummy cycle CPU use
(4) One wait is inserted into the source read under the conditions in (2) (When 16-bit data is transferred on an 8-bit data bus, there are two destination cycles).
BCLK Address bus RD signal WR signal Data bus
CPU use Source Source + 1 Destination Dummy cycle CPU use CPU use Source Source + 1 Destination Dummy cycle CPU use
Note: The same timing changes occur with the respective conditions at the destination as at the source.
Figure 1.13.5. Example of the transfer cycles for a source read
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Mitsubishi microcomputers
M16C / 30 Group DMAC (2) DMAC transfer cycles
Any combination of even or odd transfer read and write addresses is possible. Table 1.13.2 shows the number of DMAC transfer cycles. The number of DMAC transfer cycles can be calculated as follows: No. of transfer cycles per transfer unit = No. of read cycles x j + No. of write cycles x k Table 1.13.2. No. of DMAC transfer cycles Transfer unit Memory expansion mode Bus width Access address Microprocessor mode No. of read No. of write No. of read No. of write cycles cycles cycles cycles 16-bit Even 1 1 1 1 (BYTE= "L") Odd 1 1 1 1 8-bit Even -- -- 1 1 (BYTE = "H") Odd -- -- 1 1 16-bit Even 1 1 1 1 (BYTE = "L") Odd 2 2 2 2 8-bit Even -- -- 2 2 (BYTE = "H") Odd -- -- 2 2 Single-chip mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
8-bit transfers (DMBIT= "1")
16-bit transfers (DMBIT= "0")
Coefficient j, k Internal memory Internal ROM/RAM Internal ROM/RAM No wait With wait 1 2 SFR area 2 External memory Separate bus Separate bus No wait With wait 1 2 Multiplex bus 3
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Mitsubishi microcomputers
M16C / 30 Group DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMA enable bit
Setting the DMA enable bit to "1" makes the DMAC active. The DMAC carries out the following operations at the time data transfer starts immediately after DMAC is turned active. (1) Reloads the value of one of the source pointer and the destination pointer - the one specified for the forward direction - to the forward direction address pointer. (2) Reloads the value of the transfer counter reload register to the transfer counter. Thus overwriting "1" to the DMA enable bit with the DMAC being active carries out the operations given above, so the DMAC operates again from the initial state at the instant "1" is overwritten to the DMA enable bit.
DMA request bit
The DMAC can generate a DMA transfer request signal triggered by a factor chosen in advance out of DMA request factors. DMA request factors include the following. * Factors effected by using the interrupt request signals from the built-in peripheral functions and software DMA factors (internal factors) effected by a program. * External factors effected by utilizing the input from external interrupt signals. For the selection of DMA request factors, see the descriptions of the DMA0 factor selection register. The DMA request bit turns to "1" if the DMA transfer request signal occurs regardless of the DMAC's state (regardless of whether the DMA enable bit is set to "1" or "0"). It turns to "0" immediately before data transfer starts. In addition, it can be set to "0" by use of a program, but cannot be set to "1". There can be instances in which a change in DMA request factor selection bit causes the DMA request bit to turn to "1". So be sure to set the DMA request bit to "0" after the DMA request factor selection bit is changed. The DMA request bit turns to "1" if a DMA transfer request signal occurs, and turns to "0" immediately before data transfer starts. If the DMAC is active, data transfer starts immediately, so the value of the DMA request bit, if read by use of a program, turns out to be "0" in most cases. To examine whether the DMAC is active, read the DMA enable bit. Here follows the timing of changes in the DMA request bit.
(1) Internal factors
Except the DMA request factors triggered by software, the timing for the DMA request bit to turn to "1" due to an internal factor is the same as the timing for the interrupt request bit of the interrupt control register to turn to "1" due to several factors. Turning the DMA request bit to "0" due to an internal factor is timed to be effected immediately before the transfer starts.
(2) External factors
________
An external factor is a factor caused to occur by the leading edge of input from the INT0 pin. ________ Selecting the INT0 pins as external factors using the DMA request factor selection bit causes input from these pins to become the DMA transfer request signals. The timing for the DMA request bit to turn to "1" when an external factor is selected synchronizes with the signal's edge applicable to the function specified by the DMA request factor selection bit (synchronizes ________ with the trailing edge of the input signal to INT0 pin, for example). With an external factor selected, the DMA request bit is timed to turn to "0" immediately before data transfer starts similarly to the state in which an internal factor is selected.
74
Mitsubishi microcomputers
M16C / 30 Group Timer Timer
There are five 16-bit timers. These timers can be classified by function into timers A (three) and timers B (two). All these timers function independently. Figures 1.14.1 and 1.14.2 show the block diagram of timers.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock prescaler XIN 1/8 1/4 f1 f8 f32 fC32 f1 f8 f32 XCIN Clock prescaler reset flag (bit 7 at address 038116) set to "1" 1/32 Reset fC32
* Timer mode * One-shot timer mode * PWM mode
Timer A0 interrupt TA0IN
Noise filter
Timer A0
* Event counter mode
* Timer mode * One-shot timer mode * PWM mode
Timer A1 interrupt
TA1IN
Noise filter
Timer A1
* Event counter mode * Timer mode * One-shot timer mode * PWM mode
Timer A2 interrupt TA2IN
Noise filter
Timer A2
* Event counter mode
Timer B2 overflow
Note : The TA0IN pin (P71) is shared with RxD2, so be careful.
Figure 1.14.1. Timer A block diagram
75
Mitsubishi microcomputers
M16C / 30 Group Timer
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock prescaler XIN 1/8 1/4 f1 f8 f32 fC32 f1 f8 f32 XCIN Clock prescaler reset flag (bit 7 at address 038116) set to "1" 1/32 Reset fC32
* Timer mode * Pulse width measuring mode
TB1IN
Noise filter
Timer B1 interrupt
Timer B1
* Event counter mode
* Timer mode * Pulse width measuring mode
Timer B2 interrupt
TB2IN
Noise filter
Timer B2
* Event counter mode
Timer A
Figure 1.14.2. Timer B block diagram
76
Mitsubishi microcomputers
M16C / 30 Group Timer A Timer A
Figure 1.14.3 shows the block diagram of timer A. Figures 1.14.4 to 1.14.6 show the timer A-related registers. Except in event counter mode, timers A0 through A2 all have the same function. Use the timer Ai mode register (i = 0 to 2) bits 0 and 1 to choose the desired mode. Timer A has the four operation modes listed as follows: * Timer mode: The timer counts an internal count source. * Event counter mode: The timer counts pulses from an external source or a timer overflow. * One-shot timer mode: The timer stops counting when the count reaches "000016". * Pulse width modulation (PWM) mode: The timer outputs pulses of a given width.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Data bus high-order bits
Clock source selection
f1 f8 f32 fC32
Polarity selection
TAiIN (i = 0 to 2)
* Timer * One shot * PWM
Data bus low-order bits Clock selection Low-order 8 bits Reload register (16) High-order 8 bits
* Timer (gate function) * Event counter
Counter (16) Clock selection
Up count/down count Always down count except in event counter mode TAi Addresses TAj TAk Timer A1 Timer A0 038716 038616 Must not be set Timer A0 Timer A2 Timer A1 038916 038816 Timer A1 Must not be set Timer A2 038B16 038A16
Count start flag
(Address 038016)
TB2 overflow TAj overflow TAk overflow
To external trigger circuit
Down count
(j = i - 1. Note, however, must not be set when i = 0)
Up/down flag
(Address 038416)
(k = i + 1. Note, however, must not be set when i = 2)
TAiOUT
(i = 0 to 2)
Pulse output
Toggle flip-flop
Figure 1.14.3. Block diagram of timer A
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol TAiMR(i=0 to 2)
Address When reset 039616 to 039816 0016
Bit symbol
TMOD0
Bit name
Operation mode select bit
b1 b0
Function
0 0 : Timer mode 0 1 : Event counter mode 1 0 : One-shot timer mode 1 1 : Pulse width modulation (PWM) mode
RW
TMOD1
MR0 MR1 MR2 MR3 TCK0 TCK1
Function varies with each operation mode
Count source select bit (Function varies with each operation mode)
Figure 1.14.4. Timer A-related registers (1)
77
Mitsubishi microcomputers
M16C / 30 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Ai register (Note 1)
(b15) b7 (b8) b0 b7 b0
Symbol TA0 TA1 TA2 Function
Address 038716,038616 038916,038816 038B16,038A16
When reset Indeterminate Indeterminate Indeterminate
Values that can be set
RW
* Timer mode Counts an internal count source
000016 to FFFF16
* Event counter mode 000016 to FFFF16 Counts pulses from an external source or timer overflow * One-shot timer mode Counts a one shot width * Pulse width modulation mode (16-bit PWM) Functions as a 16-bit pulse width modulator * Pulse width modulation mode (8-bit PWM) Timer low-order address functions as an 8-bit prescaler and high-order address functions as an 8-bit pulse width modulator 000016 to FFFF16 (Note 2,4) 000016 to FFFE16 (Note 3,4) 0016 to FE16
(High-order address) (Low-order address)
0016 to FF16
(Note 3,4)
Note 1: Read and write data in 16-bit units. Note 2: When the timer Ai register is set to "000016", the counter does not operate and the timer Ai interrupt request is not generated. When the pulse is set to output, the pulse does not output from the TAiOUT pin. Note 3: When the timer Ai register is set to "000016", the pulse width modulator does not operate and the output level of the TAiOUT pin remains "L" level, therefore the timer Ai interrupt request is not generated. This also occurs in the 8-bit pulse width modulator mode when the significant 8 high-order bits in the timer Ai register are set to "0016". Note 4: Use MOV instruction to write to this register.
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Symbol TABSR Bit symbol TA0S TA1S TA2S
Address 038016 Bit name Timer A0 count start flag Timer A1 count start flag Timer A2 count start flag
When reset 0016 Function 0 : Stops counting 1 : Starts counting RW
Reserved bit TB1S TB2S Timer B1 count start flag Timer B2 count start flag
Must always be set to "0" 0 : Stops counting 1 : Starts counting
Up/down flag (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
0
0
00
Symbol UDF
Address 038416
When reset 0016
Bit symbol TA0UD TA1UD TA2UD
Bit name Timer A0 up/down flag Timer A1 up/down flag Timer A2 up/down flag
Function 0 : Down count 1 : Up count This specification becomes valid when the up/down flag content is selected for up/down switching cause Must always be set to "0"
RW
Reserved bit
TA2P
0 : two-phase pulse signal processing disabled Timer A2 two-phase pulse signal processing select bit 1 : two-phase pulse signal processing enabled (Note 2) When not using the two-phase pulse signal processing function, set the select bit to "0" Must always be set to "0"
Reserved bit
Note 1: Use MOV instruction to write to this register. Note 2: Set the TAiIN and TAiOUT pins correspondent port direction registers to "0".
Figure 1.14.5. Timer A-related registers (2)
78
Mitsubishi microcomputers
M16C / 30 Group Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
One-shot start flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol ONSF
Address 038216
When reset 00X000002
0
0
Bit symbol
TA0OS TA1OS TA2OS
Bit name Timer A0 one-shot start flag Timer A1 one-shot start flag Timer A2 one-shot start flag
Function
1 : Timer start When read, the value is "0"
RW
Reserved bit
Must always be set to "0"
Nothing is assigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate.
TA0TGL TA0TGH
Timer A0 event/trigger select bit
b7 b6
0 0 : Input on TA0IN is selected (Note) 0 1 : TB2 overflow is selected 1 0 : Must not be set 1 1 : TA1 overflow is selected
Note: Set the corresponding port direction register to "0".
Trigger select register
b7 b6 b5 b4 b3 b2 b1 b0
000
0
Symbol TRGSR
Address 038316
When reset 0016
Bit symbol
TA1TGL
Bit name Timer A1 event/trigger select bit
Function
b1 b0
RW
TA1TGH TA2TGL
0 0 : Input on TA1IN is selected (Note) 0 1 : TB2 overflow is selected 1 0 : TA0 overflow is selected 1 1 : TA2 overflow is selected
b3 b2
Timer A2 event/trigger select bit
TA2TGH
0 0 : Input on TA2IN is selected (Note) 0 1 : TB2 overflow is selected 1 0 : TA1 overflow is selected 1 1 : Must not be set
Must always be set to "0"
Reserved bit
Note: Set the corresponding port direction register to "0".
Clock prescaler reset flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol CPSRF
Address 038116
When reset 0XXXXXXX2
Bit symbol
Bit name
Function
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
CPSR
Clock prescaler reset flag
0 : No effect 1 : Prescaler is reset (When read, the value is "0")
Figure 1.14.6. Timer A-related registers (3)
79
Mitsubishi microcomputers
M16C / 30 Group
Timer A (1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table 1.14.1.) Figure 1.14.7 shows the timer Ai mode register in timer mode. Table 1.14.1. Specifications of timer mode Item Count source Count operation Divide ratio Count start condition Count stop condition Interrupt request generation timing TAiIN pin function TAiOUT pin function Read from timer Write to timer Specification f1, f8, f32, fC32 * Down count * When the timer underflows, it reloads the reload register contents before continuing counting 1/(n+1) n : Set value Count start flag is set (= 1) Count start flag is reset (= 0) When the timer underflows Programmable I/O port or gate input Programmable I/O port or pulse output Count value can be read out by reading timer Ai register * When counting stopped When a value is written to timer Ai register, it is written to both reload register and counter * When counting in progress When a value is written to timer Ai register, it is written to only reload register (Transferred to counter at next reload time) * Gate function Counting can be started and stopped by the TAiIN pin's input signal * Pulse output function Each time the timer underflows, the TAiOUT pin's polarity is reversed
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Select function
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Symbol TAiMR(i=0 to 2)
Bit symbol
TMOD0 TMOD1 MR0
Address When reset 039616 to 039816 0016
Bit name Function
b1 b0
RW
Operation mode select bit Pulse output function select bit
0 0 : Timer mode 0 : Pulse is not output (TAiOUT pin is a normal port pin) 1 : Pulse is output (Note 1) (TAiOUT pin is a pulse output pin)
b4 b3
MR1
Gate function select bit
0 X (Note 2): Gate function not available
(TAiIN pin is a normal port pin)
MR2
1 0 : Timer counts only when TAiIN pin is held "L" (Note 3) 1 1 : Timer counts only when TAiIN pin is held "H" (Note 3)
0 (Must always be "0" in timer mode)
Count source select bit
b7 b6
MR3
TCK0
TCK1
0 0 : f1 0 1 : f8 1 0 : f32 1 1 : fC32
Note 1: The settings of the corresponding port register and port direction register are invalid. Note 2: The bit can be "0" or "1". Note 3: Set the corresponding port direction register to "0".
Figure 1.14.7. Timer Ai mode register in timer mode
80
Mitsubishi microcomputers
M16C / 30 Group Timer A (2) Event counter mode
In this mode, the timer counts an external signal or an internal timer's overflow. Timers A0 and A1 can count a single-phase external signal. Timer A2 can count a single-phase and a two-phase external signal. Table 1.14.2 lists timer specifications when counting a single-phase external signal. Figure 1.14.8 shows the timer Ai mode register in event counter mode. Table 1.14.3 lists timer specifications when counting a two-phase external signal. Figure 1.14.9 shows the timer Ai mode register in event counter mode. Table 1.14.2. Timer specifications in event counter mode (when not processing two-phase pulse signal) Item Specification Count source * External signals input to TAiIN pin (effective edge can be selected by software) * TB2 overflow, TAj overflow Count operation * Up count or down count can be selected by external signal or software * When the timer overflows or underflows, it reloads the reload register con tents before continuing counting (Note) Divide ratio 1/ (FFFF16 - n + 1) for up count 1/ (n + 1) for down count n : Set value Count start condition Count start flag is set (= 1) Count stop condition Count start flag is reset (= 0) Interrupt request generation timing The timer overflows or underflows TAiIN pin function Programmable I/O port or count source input TAiOUT pin function Programmable I/O port, pulse output, or up/down count select input Read from timer Count value can be read out by reading timer Ai register Write to timer * When counting stopped When a value is written to timer Ai register, it is written to both reload register and counter * When counting in progress When a value is written to timer Ai register, it is written to only reload register (Transferred to counter at next reload time) Select function * Free-run count function Even when the timer overflows or underflows, the reload register content is not reloaded to it * Pulse output function Each time the timer overflows or underflows, the TAiOUT pin's polarity is reversed Note: This does not apply when the free-run function is selected.
Timer Ai mode register (When not using two-phase pulse signal processing)
b7 b6 b5 b4 b3 b2 b1 b0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
0
01
Symbol Address TAiMR(i = 0 to 2) 039616 to 039816 Bit symbol TMOD0 TMOD1 MR0 Pulse output function select bit Bit name Operation mode select bit
b1 b0
When reset 0016 Function RW
0 1 : Event counter mode (Note 1) 0 : Pulse is not output (TAiOUT pin is a normal port pin) 1 : Pulse is output (Note 2) (TAiOUT pin is a pulse output pin) 0 : Counts external signal's falling edge 1 : Counts external signal's rising edge 0 : Up/down flag's content 1 : TAiOUT pin's input signal (Note 4)
MR1 MR2 MR3 TCK0 TCK1
Count polarity select bit (Note 3) Up/down switching cause select bit
0 (Must always be "0" in event counter mode) Count operation type select bit 0 : Reload type 1 : Free-run type
Invalid when not using two-phase pulse signal processing Can be "0" or "1"
Note 1: In event counter mode, the count source is selected by the event / trigger select bit (addresses 038216 and 038316). Note 2: The settings of the corresponding port register and port direction register are invalid. Note 3: Valid only when counting an external signal. Note 4: When an "L" signal is input to the TAiOUT pin, the downcount is activated. When "H", the upcount is activated. Set the corresponding port direction register to "0".
Figure 1.14.8. Timer Ai mode register in event counter mode
81
Mitsubishi microcomputers
M16C / 30 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.14.3. Timer specifications in event counter mode (when processing two-phase pulse signal with timer A2) Item Count source Count operation Specification * Two-phase pulse signals input to TA2IN or TA2OUT pin * Up count or down count can be selected by two-phase pulse signal * When the timer overflows or underflows, the reload register content is reloaded and the timer starts over again (Note) 1/ (FFFF16 - n + 1) for up count 1/ (n + 1) for down count n : Set value Count start flag is set (= 1) Count start flag is reset (= 0) Timer overflows or underflows Two-phase pulse input (Set the TA2IN pin correspondent port direction register to "0".) Two-phase pulse input (Set the TA2OUT pin correspondent port direction register to "0".) Count value can be read out by reading timer A2 register * When counting stopped When a value is written to timer A2 register, it is written to both reload register and counter * When counting in progress When a value is written to timer A2 register, it is written to only reload register. (Transferred to counter at next reload time.) * Normal processing operation The timer counts up rising edges or counts down falling edges on the TA2IN pin when input signal on the TA2OUT pin is "H".
Divide ratio Count start condition Count stop condition
Interrupt request generation timing
TA2IN pin function TA2OUT pin function Read from timer Write to timer
Select function
TA2OUT TA2IN
Up count Up count Up count Down count Down count Down count
Note: This does not apply when the free-run function is selected.
82
Mitsubishi microcomputers
M16C / 30 Group Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Ai mode register (When using two-phase pulse signal processing) (Note)
b6 b5 b4 b3 b2 b1 b0
0
010001
Symbol TA2MR
Address 039816
When reset 0016
Bit name
TMOD0 TMOD1 MR0 MR1 MR2 MR3 TCK0 TCK1 Operation mode select bit
b1 b0
Function
0 1 : Event counter mode
RW
0 (Must always be "0" when using two-phase pulse signal processing) 0 (Must always be "0" when using two-phase pulse signal processing) 1 (Must always be "1" when using two-phase pulse signal processing) 0 (Must always be "0" when using two-phase pulse signal processing) Count operation type select bit 0 : Reload type 1 : Free-run type
0 (Must always be "0" when using two-phase pulse signal processing)
Note : When performing two-phase pulse signal processing, make sure the two-phase pulse signal processing operation select bit (address 038416) is set to "1". Also, always be sure to set the event/trigger select bit (address 038316) to "00".
Figure 1.14.9. Timer Ai mode register in event counter mode
83
Mitsubishi microcomputers
M16C / 30 Group
Timer A (3) One-shot timer mode
In this mode, the timer operates only once. (See Table 1.14.4.) When a trigger occurs, the timer starts up and continues operating for a given period. Figure 1.14.10 shows the timer Ai mode register in one-shot timer mode. Table 1.14.4. Timer specifications in one-shot timer mode Item Count source Count operation Specification f1, f8, f32, fC32 * The timer counts down * When the count reaches 000016, the timer stops counting after reloading a new count * If a trigger occurs when counting, the timer reloads a new count and restarts counting 1/n n : Set value * An external trigger is input * The timer overflows * The one-shot start flag is set (= 1) * A new count is reloaded after the count has reached 000016 * The count start flag is reset (= 0) The count reaches 000016 Programmable I/O port or trigger input Programmable I/O port or pulse output When timer Ai register is read, it indicates an indeterminate value * When counting stopped When a value is written to timer Ai register, it is written to both reload register and counter * When counting in progress When a value is written to timer Ai register, it is written to only reload register (Transferred to counter at next reload time)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Divide ratio Count start condition
Count stop condition
Interrupt request generation timing
TAiIN pin function TAiOUT pin function Read from timer Write to timer
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
0
10
Symbol Address When reset TAiMR(i = 0 to 2) 039616 to 039816 0016 Bit symbol TMOD0 TMOD1 MR0 Pulse output function select bit Bit name Operation mode select bit
b1 b0
Function 1 0 : One-shot timer mode 0 : Pulse is not output (TAiOUT pin is a normal port pin) 1 : Pulse is output (Note 1) (TAiOUT pin is a pulse output pin)
0 : Falling edge of TAiIN pin's input signal (Note 3) 1 : Rising edge of TAiIN pin's input signal (Note 3)
RW
MR1 MR2
External trigger select bit (Note 2) Trigger select bit
0 : One-shot start flag is valid 1 : Selected by event/trigger select bits
MR3 TCK0 TCK1
0 (Must always be "0" in one-shot timer mode) Count source select bit
b7 b6
0 0 : f1 0 1 : f8 1 0 : f32 1 1 : fC32
Note 1: The settings of the corresponding port register and port direction register are invalid. Note 2: Valid only when the TAiIN pin is selected by the event/trigger select bit (addresses 038216 and 038316). If timer overflow is selected, this bit can be "1" or "0". Note 3: Set the corresponding port direction register to "0".
Figure 1.14.10. Timer Ai mode register in one-shot timer mode
84
Mitsubishi microcomputers
M16C / 30 Group Timer A (4) Pulse width modulation (PWM) mode
In this mode, the timer outputs pulses of a given width in succession. (See Table 1.14.5.) In this mode, the counter functions as either a 16-bit pulse width modulator or an 8-bit pulse width modulator. Figure 1.14.11 shows the timer Ai mode register in pulse width modulation mode. Figure 1.14.12 shows the example of how a 16-bit pulse width modulator operates. Figure 1.14.13 shows the example of how an 8bit pulse width modulator operates. Table 1.14.5. Timer specifications in pulse width modulation mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Item
Count source Count operation
Specification
f1, f8, f32, fC32 * The timer counts down (operating as an 8-bit or a 16-bit pulse width modulator) * The timer reloads a new count at a rising edge of PWM pulse and continues counting * The timer is not affected by a trigger that occurs when counting * High level width n / fi n : Set value * Cycle time (216-1) / fi fixed * High level width n (m+1) / fi n : values set to timer Ai register's high-order address * Cycle time (28-1) (m+1) / fi m : values set to timer Ai register's low-order address * External trigger is input * The timer overflows * The count start flag is set (= 1) * The count start flag is reset (= 0) PWM pulse goes "L" Programmable I/O port or trigger input Pulse output When timer Ai register is read, it indicates an indeterminate value * When counting stopped When a value is written to timer Ai register, it is written to both reload register and counter * When counting in progress When a value is written to timer Ai register, it is written to only reload register (Transferred to counter at next reload time)
16-bit PWM 8-bit PWM Count start condition
Count stop condition Interrupt request generation timing TAiIN pin function TAiOUT pin function Read from timer Write to timer
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
11
1
Symbol TAiMR(i=0 to 2)
Bit symbol
TMOD0 TMOD1 MR0 MR1 MR2
Address When reset 039616 to 039816 0016
Function
b1 b0
Bit name
Operation mode select bit 1 1 : PWM mode
RW
1 (Must always be "1" in PWM mode) External trigger select bit (Note 1) Trigger select bit
0: Falling edge of TAiIN pin's input signal (Note 2) 1: Rising edge of TAiIN pin's input signal (Note 2)
0: Count start flag is valid 1: Selected by event/trigger select bits
0: Functions as a 16-bit pulse width modulator 1: Functions as an 8-bit pulse width modulator
b7 b6
MR3
16/8-bit PWM mode select bit
TCK0
Count source select bit
TCK1
0 0 : f1 0 1 : f8 1 0 : f32 1 1 : fC32
Note 1: Valid only when the TAiIN pin is selected by the event/trigger select bit (addresses 038216 and 038316). If timer overflow is selected, this bit can be "1" or "0". Note 2: Set the corresponding port direction register to "0".
Figure 1.14.11. Timer Ai mode register in pulse width modulation mode
85
Mitsubishi microcomputers
M16C / 30 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Condition : Reload register = 000316, when external trigger (rising edge of TAiIN pin input signal) is selected
1 / fi X (2 16 - 1)
Count source
TAiIN pin input signal
"H" "L"
Trigger is not generated by this signal 1 / fi X n
PWM pulse output from TAiOUT pin Timer Ai interrupt request bit
"H" "L" "1" "0"
fi : Frequency of count source (f1, f8, f32, fC32) Cleared to "0" when interrupt request is accepted, or cleared by software Note: n = 000016 to FFFE16.
Figure 1.14.12. Example of how a 16-bit pulse width modulator operates
Condition : Reload register high-order 8 bits = 0216 Reload register low-order 8 bits = 0216 External trigger (falling edge of TAiIN pin input signal) is selected
1 / fi X (m + 1) X (2 8 - 1)
Count source (Note1)
TAiIN pin input signal
"H" "L"
1 / fi X (m + 1)
"H" Underflow signal of 8-bit prescaler (Note2) "L"
1 / fi X (m + 1) X n
PWM pulse output from TAiOUT pin Timer Ai interrupt request bit
"H" "L" "1" "0"
fi : Frequency of count source (f1, f8, f32, fC32)
Cleared to "0" when interrupt request is accepted, or cleaerd by software
Note 1: The 8-bit prescaler counts the count source. Note 2: The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal. Note 3: m = 0016 to FF16; n = 0016 to FE16.
Figure 1.14.13. Example of how an 8-bit pulse width modulator operates
86
Mitsubishi microcomputers
M16C / 30 Group Timer B Timer B
Figure 1.14.14 shows the block diagram of timer B. Figures 1.14.15 and 1.14.16 show the timer B-related registers. Use the timer Bi mode register (i = 1, 2) bits 0 and 1 to choose the desired mode. Timer B has three operation modes listed as follows: * Timer mode: The timer counts an internal count source. * Event counter mode: The timer counts pulses from an external source or a timer overflow. * Pulse period/pulse width measuring mode: The timer measures an external signal's pulse period or pulse width.
Data bus high-order bits Data bus low-order bits Low-order 8 bits High-order 8 bits
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock source selection
f1 f8 f32 fC32
TBiIN (i = 1, 2)
* Timer * Pulse period/pulse width measurement
Reload register (16)
Clock selection
* Event counter Polarity switching and edge pulse Count start flag (address 038016) Counter reset circuit Can be selected in only event counter mode TBj overflow (j = i - 1. Note, however, must not be set when i = 1) TBi Timer B1 Timer B2 Address 039316 039216 039516 039416 TBj Must not be set Timer B1 Counter (16)
Figure 1.14.14. Block diagram of timer B
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol TBiMR(i = 1, 2)
Address 039C16, 039D16
When reset 00XX00002
Bit symbol
TMOD0 TMOD1
Bit name
Operation mode select bit
b1 b0
Function
0 0 : Timer mode 0 1 : Event counter mode 1 0 : Pulse period/pulse width measurement mode 1 1 : Must not be set.
R
W
MR0 MR1
Function varies with each operation mode
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
MR3 TCK0 TCK1
Function varies with each operation mode
Count source select bit (Function varies with each operation mode)
Figure 1.14.15. Timer B-related registers (1)
87
Mitsubishi microcomputers
M16C / 30 Group Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Bi register (Note)
(b15) b7 (b8) b0 b7 b0
Symbol TB1 TB2
Address 039316, 039216 039516, 039416
When reset Indeterminate Indeterminate
Function
* Timer mode Counts the timer's period * Event counter mode Counts external pulses input or a timer overflow * Pulse period / pulse width measurement mode Measures a pulse period or width
Values that can be set
RW
000016 to FFFF16
000016 to FFFF16
Note: Read and write data in 16-bit units.
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Symbol TABSR
Address 038016
When reset 0016
Bit symbol TA0S TA1S TA2S
Bit name
Timer A0 count start flag Timer A1 count start flag Timer A2 count start flag
Function
0 : Stops counting 1 : Starts counting
RW
Reverved bit TB1S TB2S Timer B1 count start flag Timer B2 count start flag
Must always be set to "0" 0 : Stops counting 1 : Starts counting
Clock prescaler reset flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol CPSRF
Address 038116
When reset 0XXXXXXX2
Bit symbol Nothing is assigned.
Bit name
Function
RW
In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate.
CPSR Clock prescaler reset flag 0 : No effect 1 : Prescaler is reset (When read, the value is "0")
Figure 1.14.16. Timer B-related registers (2)
88
Mitsubishi microcomputers
M16C / 30 Group Timer B (1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table 1.14.6.) Figure 1.14.17 shows the timer Bi mode register in timer mode. Table 1.14.6. Timer specifications in timer mode Item Count source Count operation Specification f1, f8, f32, fC32 * Counts down * When the timer underflows, it reloads the reload register contents before continuing counting 1/(n+1) n : Set value Count start flag is set (= 1) Count start flag is reset (= 0) The timer underflows Programmable I/O port Count value is read out by reading timer Bi register * When counting stopped When a value is written to timer Bi register, it is written to both reload register and counter * When counting in progress When a value is written to timer Bi register, it is written to only reload register (Transferred to counter at next reload time)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Divide ratio Count start condition Count stop condition Interrupt request generation timing TBiIN pin function Read from timer Write to timer
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol TBiMR(i=1, 2)
Address 039C16, 039D16
When reset 00XX00002
Bit symbol TMOD0 TMOD1 MR0 MR1
Bit name
Operation mode select bit
b1 b0
Function
0 0 : Timer mode
R
W
Invalid in timer mode Can be "0" or "1"
Nothing is assiigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate. MR3 Invalid in timer mode. In an attempt to write to this bit, write "0". The value, if read in timer mode, turns out to be indeterminate. Count source select bit
b7 b6
TCK0 TCK1
0 0 : f1 0 1 : f8 1 0 : f32 1 1 : fC32
Figure 1.14.17. Timer Bi mode register in timer mode
89
Mitsubishi microcomputers
M16C / 30 Group Timer B (2) Event counter mode
In this mode, the timer counts an external signal or an internal timer's overflow. (See Table 1.14.7.) Figure 1.14.18 shows the timer Bi mode register in event counter mode. Table 1.14.7. Timer specifications in event counter mode Item Count source Specification * External signals input to TBiIN pin * Effective edge of count source can be a rising edge, a falling edge, or falling and rising edges as selected by software Count operation * Counts down * When the timer underflows, it reloads the reload register contents before continuing counting Divide ratio 1/(n+1) n : Set value Count start condition Count start flag is set (= 1) Count stop condition Count start flag is reset (= 0) Interrupt request generation timing The timer underflows TBiIN pin function Read from timer Write to timer Count source input Count value can be read out by reading timer Bi register * When counting stopped When a value is written to timer Bi register, it is written to both reload register and counter * When counting in progress When a value is written to timer Bi register, it is written to only reload register (Transferred to counter at next reload time)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
01
Symbol TBiMR(i=1, 2)
Address 039C16, 039D16
When reset 00XX00002
Bit symbol
TMOD0 TMOD1 MR0
Bit name
Operation mode select bit
b1 b0
Function
0 1 : Event counter mode
b3 b2
R
W
Count polarity select bit (Note 1)
MR1
0 0 : Counts external signal's falling edges 0 1 : Counts external signal's rising edges 1 0 : Counts external signal's falling and rising edges 1 1 : Must not be set.
Nothing is assigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate. MR3 Invalid in event counter mode. In an attempt to write to this bit, write "0". The value, if read in event counter mode, turns out to be indeterminate. Invalid in event counter mode. Can be "0" or "1". Event clock select 0 : Input from TBiIN pin (Note 2) 1 : TBj overflow
(j = i - 1; however, must not be set, when i = 1)
TCK0 TCK1
Note 1: Valid only when input from the TBiIN pin is selected as the event clock. If timer's overflow is selected, this bit can be "0" or "1". Note 2: Set the corresponding port direction register to "0".
Figure 1.14.18. Timer Bi mode register in event counter mode
90
Mitsubishi microcomputers
M16C / 30 Group Timer B (3) Pulse period/pulse width measurement mode
In this mode, the timer measures the pulse period or pulse width of an external signal. (See Table 1.14.8.) Figure 1.14.19 shows the timer Bi mode register in pulse period/pulse width measurement mode. Figure 1.14.20 shows the operation timing when measuring a pulse period. Figure 1.14.21 shows the operation timing when measuring a pulse width. Table 1.14.8. Timer specifications in pulse period/pulse width measurement mode f1, f8, f32, fC32 * Up count * Counter value "000016" is transferred to reload register at measurement pulse's effective edge and the timer continues counting Count start condition Count start flag is set (= 1) Count stop condition Count start flag is reset (= 0) Interrupt request generation timing * When measurement pulse's effective edge is input (Note 1) * When an overflow occurs. (Simultaneously, the timer Bi overflow flag changes to "1". Assume that the count start flag condition is "1" and then the timer Bi overflow flag becomes "1". If the timer Bi mode register has a writeaccess after next count cycle of the timer from the above condition, the timer Bi overflow flag becomes "0".) TBiIN pin function Measurement pulse input Read from timer When timer Bi register is read, it indicates the reload register's content (measurement result) (Note 2) Write to timer Cannot be written to Note 1: An interrupt request is not generated when the first effective edge is input after the timer has started counting. Note 2: The value read out from the timer Bi register is indeterminate until the second effective edge is input after the timer has started counting.
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Item Count source Count operation
Specification
10
Symbol TBiMR(i=1, 2)
Address 039C16, 039D16
When reset 00XX00002
Bit symbol
TMOD0 TMOD1 MR0
Bit name
Operation mode select bit Measurement mode select bit
b1 b0
Function
1 0 : Pulse period / pulse width measurement mode
b3 b2
R
W
MR1
0 0 : Pulse period measurement (Interval between measurement pulse's falling edge to falling edge) 0 1 : Pulse period measurement (Interval between measurement pulse's rising edge to rising edge) 1 0 : Pulse width measurement (Interval between measurement pulse's falling edge to rising edge, and between rising edge to falling edge) 1 1 : Must not be set.
Nothing is assigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate. MR3 TCK0 TCK1 Timer Bi overflow flag (Note) Count source select bit 0 : Timer did not overflow 1 : Timer has overflowed
b7 b6
0 0 : f1 0 1 : f8 1 0 : f32 1 1 : fC32
Note: It is indeterminate when reset. Assume that the count start flag condition is "1" and then the timer Bi overflow flag becomes "1". If the timer Bi mode register has a write access after next count cycle of the timer from the above condition, the timer Bi overflow flag becomes "0". This flag cannot be set to "1" by software.
Figure 1.14.19. Timer Bi mode register in pulse period/pulse width measurement mode
91
Mitsubishi microcomputers
M16C / 30 Group Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
When measuring measurement pulse time interval from falling edge to falling edge
Count source
Measurement pulse
"H" "L" Transfer (indeterminate value) Transfer (measured value)
Reload register transfer timing
counter (Note 1) (Note 1) (Note 2)
Timing at which counter reaches "000016" Count start flag
"1" "0"
Timer Bi interrupt request bit
"1" "0"
Cleared to "0" when interrupt request is accepted, or cleared by software. Timer Bi overflow flag
"1" "0"
Note 1: Counter is initialized at completion of measurement. Note 2: Timer has overflowed.
Figure 1.14.20. Operation timing when measuring a pulse period
Count source
Measurement pulse
"H" "L"
Transfer (indeterminate value) Transfer (measured value) Transfer (measured value) Transfer (measured value)
Reload register transfer timing
counter
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 2)
Timing at which counter reaches "000016"
"1" "0"
Count start flag
Timer Bi interrupt request bit
"1" "0"
Cleared to "0" when interrupt request is accepted, or cleared by software. Timer Bi overflow flag
"1" "0"
Note 1: Counter is initialized at completion of measurement. Note 2: Timer has overflowed.
Figure 1.14.21. Operation timing when measuring a pulse width
92
Mitsubishi microcomputers
M16C / 30 Group Serial I/O Serial I/O
Serial I/O is configured as three channels: UART0, UART1, UART2. UART0, UART1 and UART2 each have an exclusive timer to generate a transfer clock, so they operate independently of each other. Figure 1.16.1 shows the block diagram of UART0, UART1 and UART2. Figures 1.16.2 and 1.16.3 show the block diagram of the transmit/receive unit. UARTi (i = 0 to 2) has two operation modes: a clock synchronous serial I/O mode and a clock asynchronous serial I/O mode (UART mode). The contents of the serial I/O mode select bits (bits 0 to 2 at addresses 03A016, 03A816 and 037816) determine whether UARTi is used as a clock synchronous serial I/O or as a UART. Although a few functions are different, UART0, UART1 and UART2 have almost the same functions. UART2, in particular, is used for the SIM interface with some extra settings added in clock-asynchronous serial I/O mode (Note). It also has the bus collision detection function that generates an interrupt request if the TxD pin and the RxD pin are different in level. Table 1.16.1 shows the comparison of functions of UART0 through UART2, and Figures 1.16.4 to 1.16.9 show the registers related to UARTi. Note: SIM : Subscriber Identity Module
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.16.1. Comparison of functions of UART0 through UART2
Function CLK polarity selection LSB first / MSB first selection Continuous receive mode selection Transfer clock output from multiple pins selection Serial data logic switch Sleep mode selection TxD, RxD I/O polarity switch TxD, RxD port output format Parity error signal output Bus collision detection UART0 Possible Possible Possible Impossible Impossible Possible Impossible CMOS output Impossible Impossible (Note 3) (Note 1) (Note 1) (Note 1) UART1 Possible Possible Possible Possible Impossible Possible Impossible CMOS output Impossible Impossible (Note 3) (Note 1) (Note 1) (Note 1) (Note 1) UART2 Possible Possible Possible Impossible Possible Impossible Possible N-channel open-drain output Possible Possible (Note 4) (Note 4) (Note 1) (Note 2) (Note 1)
Note 1: Only when clock synchronous serial I/O mode. Note 2: Only when clock synchronous serial I/O mode and 8-bit UART mode. Note 3: Only when UART mode. Note 4: Using for SIM interface.
93
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(UART0)
RxD0
UART reception
TxD0
1/16
Clock source selection
f1 f8 f32
Bit rate generator Internal (address 03A116)
Clock synchronous type UART transmission
Reception control circuit
Receive clock
Transmit/ receive unit
1 / (n0+1)
External
1/16
Clock synchronous type
Transmission control circuit
Transmit clock
Clock synchronous type
1/2
(when internal clock is selected)
Clock synchronous type (when internal clock is selected)
CLK0
CLK polarity reversing circuit
CTS/RTS disabled
CTS/RTS selected
Clock synchronous type (when external clock is selected)
CTS0 / RTS0
Vcc
CTS/RTS disabled
RTS0
CTS0
(UART1)
RxD1
Clock source selection
f1 f8 f32
1/16
TxD1
UART reception
Reception control circuit
Receive clock
Bit rate generator Internal (address 03A916)
Clock synchronous type UART transmission
1/16
Transmit/ receive unit
1 / (n1+1)
External
Clock synchronous type Clock synchronous type
1/2 (when internal clock is selected)
Transmission control circuit
Transmit clock
CLK1
CTS1 / RTS1/ CLKS1
CLK polarity reversing circuit
Clock synchronous type (when internal clock is selected)
Clock synchronous type (when external clock is selected)
CTS/RTS disabled CTS/RTS selected
RTS1 CTS1
Clock output pin select switch
VCC CTS/RTS disabled
(UART2)
RxD2
RxD polarity reversing circuit
UART reception
1/16
Clock source selection Bit rate generator f1 Internal (address 037916) f8 f32 1 / (n2+1) External
Clock synchronous type UART transmission
1/16
Reception control circuit
Receive clock
TxD polarity reversing circuit
Transmit/ receive unit
TxD2
Clock synchronous type Clock synchronous type
1/2
Transmission control circuit
Transmit clock
(when internal clock is selected)
CLK2
CLK polarity reversing circuit
Clock synchronous type (when internal clock is selected)
Clock synchronous type (when external clock is selected)
CTS/RTS selected
CTS/RTS disabled
CTS2 / RTS2
Vcc
CTS/RTS disabled
RTS2
CTS2
n0 : Values set to UART0 bit rate generator (U0BRG) n1 : Values set to UART1 bit rate generator (U1BRG) n2 : Values set to UART2 bit rate generator (U2BRG)
Figure 1.16.1. Block diagram of UARTi (i = 0 to 2)
94
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock synchronous type UART (7 bits) UART (8 bits)
1SP
PAR disabled
Clock synchronous type
UART (7 bits)
UARTi receive register
RxDi
SP 2SP
SP
PAR
PAR enabled
UART
UART (9 bits)
Clock synchronous type UART (8 bits) UART (9 bits)
0
0
0
0
0
0
0
D8
D7
D6
D5
D4
D3
D2
D1
D0
UARTi receive buffer register Address 03A616 Address 03A716 Address 03AE16 Address 03AF16
MSB/LSB conversion circuit
Data bus high-order bits Data bus low-order bits
MSB/LSB conversion circuit
D8
D7
D6
D5
D4
D3
D2
D1
D0
UARTi transmit buffer register Address 03A216 Address 03A316 Address 03AA16 Address 03AB16
UART (8 bits) UART (9 bits)
UART (9 bits)
Clock synchronous type
2SP SP SP 1SP
PAR
PAR enabled
UART
TxDi
PAR disabled Clock synchronous type
UART (7 bits)
UART (7 bits) UART (8 bits) Clock synchronous type
UARTi transmit register
"0"
SP: Stop bit PAR: Parity bit
Figure 1.16.2. Block diagram of UARTi (i = 0, 1) transmit/receive unit
95
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
No reverse
RxD2
RxD data reverse circuit
Reverse
Clock synchronous type
1SP SP 2SP SP
PAR
PAR disabled
Clock synchronous type
UART (7 bits) UART (8 bits)
UART(7 bits)
UART2 receive register
PAR enabled
UART
UART (9 bits)
Clock synchronous type
UART (8 bits) UART (9 bits)
0
0
0
0
0
0
0
D8
D7
D6
D5
D4
D3
D2
D1
D0
UART2 receive buffer register Address 037E16 Address 037F16
Logic reverse circuit + MSB/LSB conversion circuit
Data bus high-order bits Data bus low-order bits
Logic reverse circuit + MSB/LSB conversion circuit
D8
D7
D6
D5
D4
D3
D2
D1
D0
UART2 transmit buffer register Address 037A16 Address 037B16
UART (8 bits) UART (9 bits)
PAR enabled
UART (9 bits) UART
Clock synchronous type
2SP SP SP 1SP
PAR
PAR disabled
Clock synchronous type
"0"
UART (7 bits) UART (8 bits)
Clock synchronous type
UART(7 bits)
UART2 transmit register
Error signal output disable
No reverse
Error signal output circuit
Error signal output enable Reverse
TxD data reverse circuit
TxD2
SP: Stop bit PAR: Parity bit
Figure 1.16.3. Block diagram of UART2 transmit/receive unit
96
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit buffer register (Note)
(b15) b7 (b8) b0 b7 b0
Symbol U0TB U1TB U2TB
Address 03A316, 03A216 03AB16, 03AA16 037B16, 037A16
When reset Indeterminate Indeterminate Indeterminate Function RW
Transmit data Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate. Note: Use MOV instruction to write to this register.
UARTi receive buffer register
(b15) b7 (b8) b0 b7 b0
Symbol U0RB U1RB U2RB
Address 03A716, 03A616 03AF16, 03AE16 037F16, 037E16
When reset Indeterminate Indeterminate Indeterminate Function (During UART mode) Receive data
Bit symbol
Bit name
Function (During clock synchronous serial I/O mode) Receive data
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0". ABT OER FER PER SUM Arbitration lost detecting flag (Note 2) 0 : Not detected 1 : Detected Invalid 0 : No overrun error 1 : Overrun error found 0 : No framing error 1 : Framing error found 0 : No parity error 1 : Parity error found 0 : No error 1 : Error found
Overrun error flag (Note 1) 0 : No overrun error 1 : Overrun error found Framing error flag (Note 1) Invalid Parity error flag (Note 1) Error sum flag (Note 1) Invalid Invalid
Note 1: Bits 15 through 12 are set to "0" when the serial I/O mode select bit (bits 2 to 0 at addresses 03A016, 03A816 and 037816) are set to "0002" or the receive enable bit is set to "0". (Bit 15 is set to "0" when bits 14 to 12 all are set to "0".) Bits 14 and 13 are also set to "0" when the lower byte of the UARTi receive buffer register (addresses 03A616, 03AE16 and 037E16) is read out. Note 2: Arbitration lost detecting flag is allocated to U2RB and noting but "0" may be written. Nothing is assigned in bit 11 of U0RB and U1RB. When write, set "0". The value, if read, turns out to be "0".
UARTi bit rate generator (Note 1, 2)
b7 b0
Symbol U0BRG U1BRG U2BRG
Address 03A116 03A916 037916 Function
When reset Indeterminate Indeterminate Indeterminate Values that can be set 0016 to FF16 RW
Assuming that set value = n, BRGi divides the count source by n+1 Note 1: Write a value to this register while transmit/receive halts. Note 2: Use MOV instruction to write to this register.
Figure 1.16.4. Serial I/O-related registers (1)
97
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit/receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol UiMR(i=0,1)
Address 03A016, 03A816
When reset 0016
Bit symbol SMD0 SMD1 SMD2
Bit name Serial I/O mode select bit
Function (During clock synchronous serial I/O mode) Must always be "001"
b2 b1 b0
Function (During UART mode)
b2 b1 b0
RW
0 0 0 : Serial I/O invalid 0 1 0 : Must not be set. 0 1 1 : Must not be set. 1 1 1 : Must not be set.
1 0 0 : Transfer data 7 bits long 1 0 1 : Transfer data 8 bits long 1 1 0 : Transfer data 9 bits long 0 0 0 : Serial I/O invalid 0 1 0 : Must not be set. 0 1 1 : Must not be set. 1 1 1 : Must not be set. 0 : Internal clock 1 : External clock (Note) 0 : One stop bit 1 : Two stop bits Valid when bit 6 = "1" 0 : Odd parity 1 : Even parity 0 : Parity disabled 1 : Parity enabled 0 : Sleep mode deselected 1 : Sleep mode selected
CKDIR Internal/external clock select bit STPS PRY Stop bit length select bit
0 : Internal clock 1 : External clock (Note) Invalid
Odd/even parity select bit Invalid
PRYE SLEP
Parity enable bit Sleep select bit
Invalid Must always be "0"
Note : Set the corresponding port direction register to "0".
UART2 transmit/receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2MR
Address 037816
When reset 0016
Bit symbol SMD0 SMD1 SMD2
Bit name Serial I/O mode select bit
Function (During clock synchronous serial I/O mode) Must always be "001"
b2 b1 b0
Function (During UART mode)
b2 b1 b0
RW
0 0 0 : Serial I/O invalid 0 1 0 : (Note 1) 0 1 1 : Must not be set. 1 1 1 : Must not be set.
1 0 0 : Transfer data 7 bits long 1 0 1 : Transfer data 8 bits long 1 1 0 : Transfer data 9 bits long 0 0 0 : Serial I/O invalid 0 1 0 : Must not be set. 0 1 1 : Must not be set. 1 1 1 : Must not be set. Must always be "0" 0 : One stop bit 1 : Two stop bits Valid when bit 6 = "1" 0 : Odd parity 1 : Even parity 0 : Parity disabled 1 : Parity enabled 0 : No reverse 1 : Reverse Usually set to "0"
CKDIR Internal/external clock select bit STPS PRY Stop bit length select bit
0 : Internal clock 1 : External clock (Note 2) Invalid
Odd/even parity select bit Invalid
PRYE IOPOL
Parity enable bit TxD, RxD I/O polarity reverse bit
Invalid 0 : No reverse 1 : Reverse Usually set to "0"
Note 1: Bit 2 to bit 0 are set to "0102" when I2C mode is used. Note 2: Set the corresponding port direction register to "0".
Figure 1.16.5. Serial I/O-related registers (2)
98
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit/receive control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol UiC0(i=0,1) Bit symbol CLK0 CLK1 CRS
Address When reset 03A416, 03AC16 0816 Function (During clock synchronous serial I/O mode)
b1 b0 b1 b0
Bit name BRG count source select bit
Function (During UART mode) 0 0 : f1 is selected 0 1 : f8 is selected 1 0 : f32 is selected 1 1 : Must not be set.
Valid when bit 4 = "0" 0 : CTS function is selected (Note 1) 1 : RTS function is selected (Note 2)
RW
0 0 : f1 is selected 0 1 : f8 is selected 1 0 : f32 is selected 1 1 : Must not be set.
Valid when bit 4 = "0"
0 : CTS function is selected (Note 1) 1 : RTS function is selected (Note 2)
CTS/RTS function select bit
TXEPT
0 : Data present in transmit 0 : Data present in transmit register Transmit register empty register (during transmission) (during transmission) flag 1 : No data present in transmit 1 : No data present in transmit register (transmission completed) register (transmission completed) 0 : CTS/RTS function enabled 1 : CTS/RTS function disabled (P60 and P64 function as programmable I/O port) 0: TXDi pin is CMOS output 1: TXDi pin is N-channel open-drain output
CRD
CTS/RTS disable bit
0 : CTS/RTS function enabled 1 : CTS/RTS function disabled (P60 and P64 function as programmable I/O port) 0 : TXDi pin is CMOS output 1 : TXDi pin is N-channel open-drain output 0 : Transmit data is output at falling edge of transfer clock and receive data is input at rising edge 1 : Transmit data is output at rising edge of transfer clock and receive data is input at falling edge
NCH
Data output select bit
CKPOL
CLK polarity select bit
Must always be "0"
UFORM Transfer format select bit 0 : LSB first 1 : MSB first
Must always be "0"
Note 1: Set the corresponding port direction register to "0". Note 2: The settings of the corresponding port register and port direction register are invalid.
UART2 transmit/receive control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2C0 Bit symbol CLK0 CLK1 CRS CTS/RTS function select bit
Address 037C16
When reset 0816 Function (During clock synchronous serial I/O mode) Function (During UART mode)
b1 b0
Bit name BRG count source select bit
RW
b1 b0
0 0 : f1 is selected 0 1 : f8 is selected 1 0 : f32 is selected 1 1 : Must not be set.
Valid when bit 4 = "0"
0 : CTS function is selected (Note 1) 1 : RTS function is selected (Note 2)
0 0 : f1 is selected 0 1 : f8 is selected 1 0 : f32 is selected 1 1 : Must not be set.
Valid when bit 4 = "0" 0 : CTS function is selected (Note 1) 1 : RTS function is selected (Note 2)
TXEPT
0 : Data present in transmit 0 : Data present in transmit register Transmit register empty register (during transmission) (during transmission) flag 1 : No data present in transmit 1 : No data present in transmit register (transmission completed) register (transmission completed) 0 : CTS/RTS function enabled 1 : CTS/RTS function disabled (P73 functions programmable I/O port) 0: TXDi pin is CMOS output open-drain output
CRD
CTS/RTS disable bit
0 : CTS/RTS function enabled 1 : CTS/RTS function disabled (P73 functions programmable I/O port) 0 : TXDi pin is CMOS output open-drain output 0 : Transmit data is output at falling edge of transfer clock and receive data is input at rising edge 1 : Transmit data is output at rising edge of transfer clock and receive data is input at falling edge
Nothing is assigned.
CKPOL
: TXDi pin is N-channel 1: to be "0". In an attempt to write to this bit, write1"0". The value, if read, turns out TXDi pin is N-channel
CLK polarity select bit
Must always be "0"
UFORM Transfer format select bit 0 : LSB first 1 : MSB first (Note 3)
0 : LSB first 1 : MSB first
Note 1: Set the corresponding port direction register to "0". Note 2: The settings of the corresponding port register and port direction register are invalid. Note 3: Only clock synchronous serial I/O mode and 8-bit UART mode are valid.
Figure 1.16.6. Serial I/O-related registers (3)
99
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit/receive control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol UiC1(i=0,1)
Address 03A516,03AD16
When reset 0216
Bit symbol TE TI
Bit name Transmit enable bit Transmit buffer empty flag
Function (During clock synchronous serial I/O mode) 0 : Transmission disabled 1 : Transmission enabled 0 : Data present in transmit buffer register 1 : No data present in transmit buffer register 0 : Reception disabled 1 : Reception enabled 0 : No data present in receive buffer register 1 : Data present in receive buffer register
Function (During UART mode) 0 : Transmission disabled 1 : Transmission enabled 0 : Data present in transmit buffer register 1 : No data present in transmit buffer register 0 : Reception disabled 1 : Reception enabled 0 : No data present in receive buffer register 1 : Data present in receive buffer register
RW
RE RI
Receive enable bit Receive complete flag
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
UART2 transmit/receive control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2C1
Address 037D16
When reset 0216
Bit symbol TE TI
Bit name Transmit enable bit Transmit buffer empty flag
Function (During clock synchronous serial I/O mode) 0 : Transmission disabled 1 : Transmission enabled 0 : Data present in transmit buffer register 1 : No data present in transmit buffer register 0 : Reception disabled 1 : Reception enabled 0 : No data present in receive buffer register 1 : Data present in receive buffer register 0 : Transmit buffer empty (TI = 1) 1 : Transmit is completed (TXEPT = 1) 0 : Continuous receive mode disabled 1 : Continuous receive mode enabled 0 : No reverse 1 : Reverse Must always be "0"
Function (During UART mode) 0 : Transmission disabled 1 : Transmission enabled 0 : Data present in transmit buffer register 1 : No data present in transmit buffer register 0 : Reception disabled 1 : Reception enabled 0 : No data present in receive buffer register 1 : Data present in receive buffer register 0 : Transmit buffer empty (TI = 1) 1 : Transmit is completed (TXEPT = 1) Must always be "0"
RW
RE RI
Receive enable bit Receive complete flag
U2IRS UART2 transmit interrupt cause select bit
U2RRM UART2 continuous receive mode enable bit
U2LCH Data logic select bit U2ERE Error signal output enable bit
0 : No reverse 1 : Reverse 0 : Output disabled 1 : Output enabled
Figure 1.16.7. Serial I/O-related registers (4)
100
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UART transmit/receive control register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol UCON
Address 03B016
When reset X00000002
Bit symbol U0IRS
Bit name UART0 transmit interrupt cause select bit UART1 transmit interrupt cause select bit
Function (During clock synchronous serial I/O mode)
0 : Transmit buffer empty (Tl = 1) 1 : Transmission completed
(TXEPT = 1)
Function (During UART mode)
0 : Transmit buffer empty (Tl = 1) 1 : Transmission completed (TXEPT = 1) 0 : Transmit buffer empty (Tl = 1) 1 : Transmission completed (TXEPT = 1)
RW
U1IRS
0 : Transmit buffer empty (Tl = 1) 1 : Transmission completed
(TXEPT = 1)
U0RRM UART0 continuous receive mode enable bit
0 : Continuous receive mode disabled 1 : Continuous receive mode enable 0 : Continuous receive mode disabled 1 : Continuous receive mode enabled Valid when bit 5 = "1" 0 : Clock output to CLK1 1 : Clock output to CLKS1 0 : Normal mode
(CLK output is CLK1 only)
Must always be "0"
U1RRM UART1 continuous receive mode enable bit
Must always be "0"
CLKMD0 CLK/CLKS select bit 0
Invalid
CLKMD1 CLK/CLKS select bit 1 (Note)
Must always be "0"
1 : Transfer clock output from multiple pins function selected Reserved bit Must always be set to "0"
Nothing is assigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate. Note: When using multiple pins to output the transfer clock, the following requirements must be met: * UART1 internal/external clock select bit (bit 3 at address 03A816) = "0".
UART2 special mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR
Address 037716
When reset 0016
Bit symbol IICM ABC BBS LSYN ABSCS
Bit name I2C mode select bit Arbitration lost detecting flag control bit Bus busy flag SCLL sync output enable bit Bus collision detect sampling clock select bit Auto clear function select bit of transmit enable bit Transmit start condition select bit SDA digital delay select bit (Note 2, Note 3)
Function (During clock synchronous serial I/O mode) 0 : Normal mode 1 : I2C mode 0 : Update per bit 1 : Update per byte
0 : STOP condition detected 1 : START condition detected
Function (During UART mode) Must always be "0" Must always be "0" Must always be "0"
RW
(Note1)
0 : Disabled 1 : Enabled Must always be "0"
Must always be "0" 0 : Rising edge of transfer clock 1 : Underflow signal of timer A0 0 : No auto clear function 1 : Auto clear at occurrence of bus collision 0 : Ordinary 1 : Falling edge of RXD2 Must always be "0"
ACSE
Must always be "0"
SSS
Must always be "0" 0 : Analog delay output is selected 1 : Digital delay output is selected (must always be "0" when not using I 2 C mode)
SDDS
Note 1: Nothing but "0" may be written. Note 2: When not in I2C mode, do not set this bit by writing a "1". During normal mode, set it to "0". When this bit = "0", UART2 special mode register 3 (U2SMR3 at address 037516) bits 7 to 5 (DL2 to DL0 = SDA digital delay setup bits) are initialized to "000", with the analog delay circuit selected. Also, when SDDS = "0", the U2SMR3 register cannot be read or written to. Note 3: When analog delay is selected, only the analog delay value is effective; when digital delay is selected, only the digital delay value is effective.
Figure 1.16.8. Serial I/O-related registers (5)
101
Mitsubishi microcomputers
M16C / 30 Group Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UART2 special mode register 2 (I 2 C bus exclusive use register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR2
Address 037616
When reset 0016 Function (I2C bus exclusive use)
Bit symbol IICM2 CSC SWC ALS STAC SWC2 SDHI SHTC
Bit name I 2C mode select bit 2 Clock-synchronous bit SCL wait output bit SDA output stop bit UART2 initialization bit SCL wait output bit 2 SDA output disable bit Start/stop condition control bit
RW
Refer to Table 1.16.11 0 : Disabled 1 : Enabled 0 : Disabled 1 : Enabled 0 : Disabled 1 : Enabled 0 : Disabled 1 : Enabled 0: UART2 clock 1: 0 output 0: Enabled 1: Disabled (high impedance) 1: Set this bit to "1" in I2C mode (refer to Table 1.16.12)
UART2 special mode register 3 (I 2 C bus exclusive use register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR3
Address 037516
When reset Indeterminate (However, when SDDS = "1", the initial value is "0016") Function (I 2 C bus exclusive use register) RW
Bit symbol
Bit name
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate. However, when SDDS = "1", the value "0" is read out (Note 1) DL0 SDA digital delay setup bit (Note 1, Note 2, Note 3, Note 4)
b7 b6 b5
DL1
DL2
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 : Analog delay is selected 1 : 1 to 2 cycle(s) of 1/f(XIN) 0 : 2 to 3 cycles of 1/f(XIN) 1 : 3 to 4 cycles of 1/f(XIN) 0 : 4 to 5 cycles of 1/f(XIN) 1 : 5 to 6 cycles of 1/f(XIN) 0 : 6 to 7 cycles of 1/f(XIN) 1 : 7 to 8 cycles of 1/f(XIN)
Digital delay is selected
Note 1: This bit can be read or written to when UART2 special mode register (U2SMR at address 037716) bit 7 (SDDS: SDA digital delay select bit) = "1". When the initial value of UART2 special mode register 3 (U2SMR3) is read after setting SDDS = "1", the value is "0016". When writing to UART2 special mode register 3 (U2SMR3) after setting SDDS = "1", be sure to write 0's to bits 0-4. When SDDS = "0", this register cannot be written to; when read, the value is indeterminate. Note 2: These bits are initialized to "000" when SDDS = "0", with the analog delay circuit selected. After a reset, these bits are set to "000", with the analog delay circuit selected. However, because these bits can be read only when SDDS = "1", the value read from these bits when SDDS = "0" is indeterminate. Note 3: When analog delay is selected, only the analog delay value is effective; when digital delay is selected, only the digital delay value is effective. Note 4: The amount of delay varies with the load on SCL and SDA pins. Also, when using an external clock, the amount of delay increases by about 100 ns, so be sure to take this into account when using the device.
Figure 1.16.9. Serial I/O-related registers (6)
102
Mitsubishi microcomputers
M16C / 30 Group Clock synchronous serial I/O mode (1) Clock synchronous serial I/O mode
The clock synchronous serial I/O mode uses a transfer clock to transmit and receive data. Tables 1.16.2 and 1.16.3 list the specifications of the clock synchronous serial I/O mode. Figure 1.16.10 shows the UARTi transmit/receive mode register. Table 1.16.2. Specifications of clock synchronous serial I/O mode (1) Specification * Transfer data length: 8 bits * When internal clock is selected (bit 3 at addresses 03A016, 03A816, 037816 = "0") : fi/ 2(n+1) (Note 1) fi = f1, f8, f32 * When external clock is selected (bit 3 at addresses 03A016, 03A816, 037816 = "1") : Input from CLKi pin _______ _______ _______ _______ Transmission/reception control * CTS function, RTS function, CTS and RTS function invalid: selectable Transmission start condition * To start transmission, the following requirements must be met: _ Transmit enable bit (bit 0 at addresses 03A516, 03AD16, 037D16) = "1" _ Transmit buffer empty flag (bit 1 at addresses 03A516, 03AD16, 037D16) = "0" _______ _______ _ When CTS function selected, CTS input level = "L" * Furthermore, if external clock is selected, the following requirements must also be met: _ CLKi polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16) = "0": CLKi input level = "H" _ CLKi polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16) = "1": CLKi input level = "L" Reception start condition * To start reception, the following requirements must be met: _ Receive enable bit (bit 2 at addresses 03A516, 03AD16, 037D16) = "1" _ Transmit enable bit (bit 0 at addresses 03A516, 03AD16, 037D16) = "1" _ Transmit buffer empty flag (bit 1 at addresses 03A516, 03AD16, 037D16) = "0" * Furthermore, if external clock is selected, the following requirements must also be met: _ CLKi polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16) = "0": CLKi input level = "H" _ CLKi polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16) = "1": CLKi input level = "L" * When transmitting Interrupt request _ Transmit interrupt cause select bit (bits 0, 1 at address 03B016, bit 4 at generation timing address 037D16) = "0": Interrupts requested when data transfer from UARTi transfer buffer register to UARTi transmit register is completed _ Transmit interrupt cause select bit (bits 0, 1 at address 03B016, bit 4 at address 037D16) = "1": Interrupts requested when data transmission from UARTi transfer register is completed * When receiving _ Interrupts requested when data transfer from UARTi receive register to UARTi receive buffer register is completed Error detection * Overrun error (Note 2) This error occurs when the next data is ready before contents of UARTi receive buffer register are read out Note 1: "n" denotes the value 0016 to FF16 that is set to the UART bit rate generator. Note 2: If an overrun error occurs, the UARTi receive buffer will have the next data written in. Note also that the UARTi receive interrupt request bit does not change. Item Transfer data format Transfer clock
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
103
Mitsubishi microcomputers
Clock synchronous serial I/O mode
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.16.3. Specifications of clock synchronous serial I/O mode (2) Item Select function Specification * CLK polarity selection Whether transmit data is output/input timing at the rising edge or falling edge of the transfer clock can be selected * LSB first/MSB first selection Whether transmission/reception begins with bit 0 or bit 7 can be selected * Continuous receive mode selection Reception is enabled simultaneously by a read from the receive buffer register * Transfer clock output from multiple pins selection (UART1) UART1 transfer clock can be chosen by software to be output from one of the two pins set * Switching serial data logic (UART2) Whether to reverse data in writing to the transmission buffer register or reading the reception buffer register can be selected. * TxD, RxD I/O polarity reverse (UART2) This function is reversing TxD port output and RxD port input. All I/O data level is reversed.
104
Mitsubishi microcomputers
M16C / 30 Group Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit/receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
0
001
Symbol UiMR(i=0,1) Bit symbol SMD0 SMD1 SMD2 CKDIR STPS PRY PRYE SLEP
Address 03A016, 03A816 Bit name
When reset 0016 Function
b2 b1 b0
RW
Serial I/O mode select bit
0 0 1 : Clock synchronous serial I/O mode 0 : Internal clock 1 : External clock (Note)
Internal/external clock select bit
Invalid in clock synchronous serial I/O mode 0 (Must always be "0" in clock synchronous serial I/O mode)
Note : Set the corresponding port direction register to "0".
UART2 transmit/receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
0
001
Symbol U2MR Bit symbol SMD0 SMD1 SMD2 CKDIR STPS PRY PRYE IOPOL
Address 037816 Bit name
When reset 0016 Function
b2 b1 b0
RW
Serial I/O mode select bit
0 0 1 : Clock synchronous serial I/O mode 0 : Internal clock 1 : External clock (Note 2)
Internal/external clock select bit
Invalid in clock synchronous serial I/O mode TxD, RxD I/O polarity reverse bit (Note 1) 0 : No reverse 1 : Reverse
Note 1: Usually set to "0". Note 2: Set the corresponding port direction register to "0".
Figure 1.16.10. UARTi transmit/receive mode register in clock synchronous serial I/O mode
105
Mitsubishi microcomputers
Clock synchronous serial I/O mode
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.16.4 lists the functions of the input/output pins during clock synchronous serial I/O mode. This table shows the pin functions when the transfer clock output from multiple pins function is not selected. Note that for a period from when the UARTi operation mode is selected to when transfer starts, the TxDi pin outputs an "H". (If the N-channel open-drain is selected, this pin is in floating state.) Table 1.16.4. Input/output pin functions in clock synchronous serial I/O mode (when transfer clock output from multiple pins is not selected)
Pin name Function Method of selection (Outputs dummy data when performing reception only) Port P62, P66 and P71 direction register (bits 2 and 6 at address 03EE16, bit 1 at address 03EF16)= "0" (Can be used as an input port when performing transmission only) Internal/external clock select bit (bit 3 at address 03A016, 03A816, 037816) = "0" Internal/external clock select bit (bit 3 at address 03A016, 03A816, 037816) = "1" Port P61, P65 and P72 direction register (bits 1 and 5 at address 03EE16, bit 2 at address 03EF16) = "0" CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) ="0" CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = "0" Port P60, P64 and P73 direction register (bits 0 and 4 at address 03EE16, bit 3 at address 03EF16) = "0" CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = "0" CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = "1" CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = "1" TxDi Serial data output (P63, P67, P70) Serial data input RxDi (P62, P66, P71) CLKi Transfer clock output (P61, P65, P72) Transfer clock input
CTSi/RTSi CTS input (P60, P64, P73)
RTS output Programmable I/O port
106
Mitsubishi microcomputers
M16C / 30 Group Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Example of transmit timing (when internal clock is selected)
Tc
Transfer clock
"1" "0" "1" "0" Transferred from UARTi transmit buffer register to UARTi transmit register "H" Data is set in UARTi transmit buffer register
Transmit enable bit (TE) Transmit buffer empty flag (Tl) CTSi
"L"
TCLK
Stopped pulsing because CTS = "H"
Stopped pulsing because transfer enable bit = "0"
CLKi
TxDi Transmit register empty flag (TXEPT)
"1" "0"
D0 D1 D2 D3 D4 D5 D6 D7
D0 D1 D2 D3 D4 D5 D6 D7
D0 D1 D2 D3 D4 D5 D6 D7
Transmit interrupt "1" request bit (IR) "0"
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings: * Internal clock is selected. * CTS function is selected. * CLK polarity select bit = "0". * Transmit interrupt cause select bit = "0". Tc = TCLK = 2(n + 1) / fi fi: frequency of BRGi count source (f1, f8, f32) n: value set to BRGi
* Example of receive timing (when external clock is selected)
Receive enable bit (RE) Transmit enable bit (TE) Transmit buffer empty flag (Tl) RTSi
"1" "0" "1" "0" "1" "0" "H" "L"
Dummy data is set in UARTi transmit buffer register
Transferred from UARTi transmit buffer register to UARTi transmit register
1 / fEXT
Receive data is taken in
CLKi
RxDi Receive complete "1" flag (Rl) "0" Receive interrupt request bit (IR)
"1" "0"
D0 D1 D2 D3 D4 D5 D6 D7
Transferred from UARTi receive register to UARTi receive buffer register
D0 D1 D2
D3 D4 D5
Read out from UARTi receive buffer register
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings: * External clock is selected. * RTS function is selected. * CLK polarity select bit = "0". fEXT: frequency of external clock Meet the following conditions are met when the CLK input before data reception = "H" * Transmit enable bit "1" * Receive enable bit "1" * Dummy data write to UARTi transmit buffer register
Figure 1.16.11. Typical transmit/receive timings in clock synchronous serial I/O mode
107
Mitsubishi microcomputers
Clock synchronous serial I/O mode
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(a) Polarity select function As shown in Figure 1.16.12, the CLK polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16) allows selection of the polarity of the transfer clock.
* When CLK polarity select bit = "0"
CLKi TXDi RXDi D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7
Note 1: The CLKi pin level when not transferring data is "H".
* When CLK polarity select bit = "1"
CLKi TXDi RXDi D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7
Note 2: The CLKi pin level when not transferring data is "L".
Figure 1.16.12. Polarity of transfer clock (b) LSB first/MSB first select function As shown in Figure 1.16.13, when the transfer format select bit (bit 7 at addresses 03A416, 03AC16, 037C16) = "0", the transfer format is "LSB first"; when the bit = "1", the transfer format is "MSB first".
* When transfer format select bit = "0"
CLKi TXDi RXDi D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7
LSB first
D7
* When transfer format select bit = "1"
CLKi TXDi RXDi D7 D7 D6 D6 D5 D5 D4 D4 D3 D3 D2 D2 D1 D1 D0
MSB first
D0
Note: This applies when the CLK polarity select bit = "0".
Figure 1.16.13. Transfer format
108
Mitsubishi microcomputers
M16C / 30 Group Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(c) Transfer clock output from multiple pins function (UART1) This function allows the setting two transfer clock output pins and choosing one of the two to output a clock by using the CLK and CLKS select bit (bits 4 and 5 at address 03B016). (See Figure 1.16.14.) The multiple pins function is valid only when the internal clock is selected for UART1.
Microcomputer
TXD1 (P67)
CLKS1 (P64) CLK1 (P65) IN CLK IN CLK
Note: This applies when the internal clock is selected and transmission is performed only in clock synchronous serial I/O mode.
Figure 1.16.14. The transfer clock output from the multiple pins function usage (d) Continuous receive mode If the continuous receive mode enable bit (bits 2 and 3 at address 03B016, bit 5 at address 037D16) is set to "1", the unit is placed in continuous receive mode. In this mode, when the receive buffer register is read out, the unit simultaneously goes to a receive enable state without having to set dummy data to the transmit buffer register back again. (e) Serial data logic switch function (UART2) When the data logic select bit (bit6 at address 037D16) = "1", and writing to transmit buffer register or reading from receive buffer register, data is reversed. Figure 1.16.15 shows the example of serial data logic switch timing.
*When LSB first
Transfer clock TxD2
"H" "L" "H"
(no reverse) "L"
D0
D1
D2
D3
D4
D5
D6
D7
TxD2
"H"
(reverse) "L"
D0
D1
D2
D3
D4
D5
D6
D7
Figure 1.16.15. Serial data logic switch timing
109
Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode (2) Clock asynchronous serial I/O (UART) mode
The UART mode allows transmitting and receiving data after setting the desired transfer rate and transfer data format. Tables 1.16.5 and 1.16.6 list the specifications of the UART mode. Figure 1.16.16 shows the UARTi transmit/receive mode register. Table 1.16.5. Specifications of UART Mode (1) Item Transfer data format Specification * Character bit (transfer data): 7 bits, 8 bits, or 9 bits as selected * Start bit: 1 bit * Parity bit: Odd, even, or nothing as selected * Stop bit: 1 bit or 2 bits as selected * When internal clock is selected (bit 3 at addresses 03A016, 03A816, 037816 = "0") : fi/16(n+1) (Note 1) fi = f1, f8, f32 * When external clock is selected (bit 3 at addresses 03A016, 03A816 ="1") : fEXT/16(n+1) (Note 1) (Note 2) (Do not set external clock for UART2)
_______ _______ _______ _______
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Transfer clock
Transmission/reception control * CTS function, RTS function, CTS and RTS function invalid: selectable Transmission start condition * To start transmission, the following requirements must be met: - Transmit enable bit (bit 0 at addresses 03A516, 03AD16, 037D16) = "1" - Transmit buffer empty flag (bit 1 at addresses 03A516, 03AD16, 037D16) = "0" _______ _______ - When CTS function selected, CTS input level = "L" Reception start condition * To start reception, the following requirements must be met: - Receive enable bit (bit 2 at addresses 03A516, 03AD16, 037D16) = "1" - Start bit detection Interrupt request * When transmitting generation timing - Transmit interrupt cause select bits (bits 0,1 at address 03B016, bit4 at address 037D16) = "0": Interrupts requested when data transfer from UARTi transfer buffer register to UARTi transmit register is completed - Transmit interrupt cause select bits (bits 0, 1 at address 03B016, bit4 at address 037D16) = "1": Interrupts requested when data transmission from UARTi transfer register is completed * When receiving - Interrupts requested when data transfer from UARTi receive register to UARTi receive buffer register is completed Error detection * Overrun error (Note 3) This error occurs when the next data is ready before contents of UARTi receive buffer register are read out * Framing error This error occurs when the number of stop bits set is not detected * Parity error This error occurs when if parity is enabled, the number of 1's in parity and character bits does not match the number of 1's set * Error sum flag This flag is set (= 1) when any of the overrun, framing, and parity errors is encountered Note 1: `n' denotes the value 0016 to FF16 that is set to the UARTi bit rate generator. Note 2: fEXT is input from the CLKi pin. Note 3: If an overrun error occurs, the UARTi receive buffer will have the next data written in. Note also that the UARTi receive interrupt request bit does not change.
110
Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
Table 1.16.6. Specifications of UART Mode (2) Item Select function Specification * Sleep mode selection (UART0, UART1) This mode is used to transfer data to and from one of multiple slave microcomputers * Serial data logic switch (UART2) This function is reversing logic value of transferring data. Start bit, parity bit and stop bit are not reversed. * TXD, RXD I/O polarity switch (UART2) This function is reversing TXD port output and RXD port input. All I/O data level is reversed.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
111
Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit / receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
Symbol UiMR(i=0,1)
Address 03A016, 03A816
When reset 0016
Bit symbol
SMD0 SMD1 SMD2 CKDIR STPS PRY
Bit name
Serial I/O mode select bit
b2 b1 b0
Function
1 0 0 : Transfer data 7 bits long 1 0 1 : Transfer data 8 bits long 1 1 0 : Transfer data 9 bits long 0 : Internal clock 1 : External clock (Note) 0 : One stop bit 1 : Two stop bits Valid when bit 6 = "1" 0 : Odd parity 1 : Even parity 0 : Parity disabled 1 : Parity enabled 0 : Sleep mode deselected 1 : Sleep mode selected
RW
Internal / external clock select bit Stop bit length select bit Odd / even parity select bit Parity enable bit Sleep select bit
PRYE SLEP
Note : Set the corresponding port direction register to "0".
UART2 transmit / receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2MR
Address 037816
When reset 0016
Bit symbol
SMD0 SMD1 SMD2 CKDIR STPS PRY
Bit name
Serial I/O mode select bit
b2 b1 b0
Function
1 0 0 : Transfer data 7 bits long 1 0 1 : Transfer data 8 bits long 1 1 0 : Transfer data 9 bits long Must always be "0" 0 : One stop bit 1 : Two stop bits Valid when bit 6 = "1" 0 : Odd parity 1 : Even parity 0 : Parity disabled 1 : Parity enabled 0 : No reverse 1 : Reverse
RW
Internal / external clock select bit Stop bit length select bit Odd / even parity select bit Parity enable bit TxD, RxD I/O polarity reverse bit (Note)
PRYE IOPOL
Note: Usually set to "0".
Figure 1.16.16. UARTi transmit/receive mode register in UART mode
112
Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.16.7 lists the functions of the input/output pins during UART mode. Note that for a period from when the UARTi operation mode is selected to when transfer starts, the TxDi pin outputs an "H". (If the Nchannel open-drain is selected, this pin is in floating state.) Table 1.16.7. Input/output pin functions in UART mode
Pin name Function TxDi Serial data output (P63, P67, P70) RxDi Serial data input (P62, P66, P71) CLKi Programmable I/O port (P61, P65, P72) Transfer clock input Method of selection
Port P62, P66 and P71 direction register (bits 2 and 6 at address 03EE16, bit 1 at address 03EF16)= "0" (Can be used as an input port when performing transmission only) Internal/external clock select bit (bit 3 at address 03A016, 03A816, 037816) = "0" Internal/external clock select bit (bit 3 at address 03A016, 03A816) = "1" Port P61, P65 direction register (bits 1 and 5 at address 03EE16) = "0" (Do not set external clock for UART2) CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) ="0" CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = "0" Port P60, P64 and P73 direction register (bits 0 and 4 at address 03EE16, bit 3 at address 03EF16) = "0" CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = "0" CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = "1" CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = "1"
CTSi/RTSi CTS input (P60, P64, P73)
RTS output Programmable I/O port
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Example of transmit timing when transfer data is 8 bits long (parity enabled, one stop bit)
The transfer clock stops momentarily as CTS is "H" when the stop bit is checked. The transfer clock starts as the transfer starts immediately CTS changes to "L".
Tc
Transfer clock Transmit enable bit(TE) Transmit buffer empty flag(TI)
"1" "0" "1" "0"
Data is set in UARTi transmit buffer register.
Transferred from UARTi transmit buffer register to UARTi transmit register
"H"
CTSi
"L"
Start bit TxDi
"1" Transmit register empty flag (TXEPT) "0" "1" "0"
Parity bit
P
Stop bit
SP
Stopped pulsing because transmit enable bit = "0"
ST D0 D1
ST D0 D1 D2 D3 D4 D5 D6 D7
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
Transmit interrupt request bit (IR)
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings : * Parity is enabled. * One stop bit. * CTS function is selected. * Transmit interrupt cause select bit = "1". Tc = 16 (n + 1) / fi or 16 (n + 1) / fEXT fi : frequency of BRGi count source (f1, f8, f32) fEXT : frequency of BRGi count source (external clock) n : value set to BRGi
* Example of transmit timing when transfer data is 9 bits long (parity disabled, two stop bits)
Tc
Transfer clock Transmit enable bit(TE) Transmit buffer empty flag(TI)
"1" "0" "1" "0"
Data is set in UARTi transmit buffer register
Transferred from UARTi transmit buffer register to UARTi transmit register Start bit TxDi
"1" Transmit register empty flag (TXEPT) "0" "1" "0"
Stop bit
Stop bit
ST D0 D1 D2 D3 D4 D5 D6 D7 D8 SPSP ST D0 D1
ST D0 D1 D2 D3 D4 D5 D6 D7 D8 SP SP
Transmit interrupt request bit (IR)
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings : * Parity is disabled. * Two stop bits. * CTS function is disabled. * Transmit interrupt cause select bit = "0". Tc = 16 (n + 1) / fi or 16 (n + 1) / fEXT fi : frequency of BRGi count source (f1, f8, f32) fEXT : frequency of BRGi count source (external clock) n : value set to BRGi
Figure 1.16.17. Typical transmit timings in UART mode(UART0,UART1)
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Example of transmit timing when transfer data is 8 bits long (parity enabled, one stop bit)
Tc
Transfer clock Transmit enable bit(TE) Transmit buffer empty flag(TI)
"1" "0" "1" "0"
Data is set in UART2 transmit buffer register
Note
Transferred from UART2 transmit buffer register to UARTi transmit register Start bit
ST D0 D1
TxD2
Parity bit
D2 D3 D4 D5 D6 D7 P
Stop bit
SP ST D0 D1 D2 D3 D4 D5 D6 D7 P
SP
"1" Transmit register empty flag (TXEPT) "0"
Transmit interrupt request bit (IR)
"1" "0"
Cleared to "0" when interrupt request is accepted, or cleared by software
Shown in ( ) are bit symbols. The above timing applies to the following settings : * Parity is enabled. * One stop bit. * Transmit interrupt cause select bit = "1". Tc = 16 (n + 1) / fi fi : frequency of BRG2 count source (f1, f8, f32) n : value set to BRG2
Note: The transmit is started with overflow timing of BRG after having written in a value at the transmit buffer in the above timing.
Figure 1.16.18. Typical transmit timings in UART mode(UART2)
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
* Example of receive timing when transfer data is 8 bits long (parity disabled, one stop bit)
BRGi count source Receive enable bit RxDi "1" "0" Start bit Sampled "L" Receive data taken in Transfer clock Receive complete flag RTSi Receive interrupt request bit Reception triggered when transfer clock "1" is generated by falling edge of start bit "0" "H" "L" "1" "0" Cleared to "0" when interrupt request is accepted, or cleared by software The above timing applies to the following settings : *Parity is disabled. *One stop bit. *RTS function is selected. Transferred from UARTi receive register to UARTi receive buffer register
Stop bit
D0
D1
D7
Figure 1.16.19. Typical receive timing in UART mode
(a) Sleep mode (UART0, UART1) This mode is used to transfer data between specific microcomputers among multiple microcomputers connected using UARTi. The sleep mode is selected when the sleep select bit (bit 7 at addresses 03A016, 03A816) is set to "1" during reception. In this mode, the unit performs receive operation when the MSB of the received data = "1" and does not perform receive operation when the MSB = "0". (b) Function for switching serial data logic (UART2) When the data logic select bit (bit 6 of address 037D16) is assigned "1", data is inverted in writing to the transmission buffer register or reading the reception buffer register. Figure 1.16.20 shows the example of timing for switching serial data logic.
* When LSB first, parity enabled, one stop bit
Transfer clock TxD2
(no reverse)
"H" "L" "H" "L" "H" "L"
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
TxD2
(reverse)
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
ST : Start bit P : Even parity SP : Stop bit
Figure 1.16.20. Timing for switching serial data logic
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(c) TxD, RxD I/O polarity reverse function (UART2) This function is to reverse TXD pin output and RXD pin input. The level of any data to be input or output (including the start bit, stop bit(s), and parity bit) is reversed. Set this function to "0" (not to reverse) for usual use.
(d) Bus collision detection function (UART2) This function is to sample the output level of the TXD pin and the input level of the RXD pin at the rising edge of the transfer clock; if their values are different, then an interrupt request occurs. Figure 1.16.21 shows the example of detection timing of a bus collision (in UART mode).
Transfer clock
"H" "L"
TxD2
"H" "L"
ST
SP
RxD2 Bus collision detection interrupt request signal Bus collision detection interrupt request bit
"H" "L" "1" "0" "1" "0"
ST
SP
ST : Start bit SP : Stop bit
Figure 1.16.21. Detection timing of a bus collision (in UART mode)
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) Clock-asynchronous serial I/O mode (used for the SIM interface)
The SIM interface is used for connecting the microcomputer with a memory card or the like; adding some extra settings in UART2 clock-asynchronous serial I/O mode allows the user to effect this function. Table 1.16.8 shows the specifications of clock-asynchronous serial I/O mode (used for the SIM interface). Table 1.16.8. Specifications of clock-asynchronous serial I/O mode (used for the SIM interface) Item Transfer data format Specification * Transfer data 8-bit UART mode (bit 2 through bit 0 of address 037816 = "1012") * One stop bit (bit 4 of address 037816 = "0") * With the direct format chosen Set parity to "even" (bit 5 and bit 6 of address 037816 = "1" and "1" respectively) Set data logic to "direct" (bit 6 of address 037D16 = "0"). Set transfer format to LSB (bit 7 of address 037C16 = "0"). * With the inverse format chosen Set parity to "odd" (bit 5 and bit 6 of address 037816 = "0" and "1" respectively) Set data logic to "inverse" (bit 6 of address 037D16 = "1") Set transfer format to MSB (bit 7 of address 037C16 = "1") * With the internal clock chosen (bit 3 of address 037816 = "0") : fi / 16 (n + 1) (Note 1) : fi=f1, f8, f32 (Do not set external clock)
_______ _______
Transfer clock
Transmission / reception control * Disable the CTS and RTS function (bit 4 of address 037C16 = "1") Other settings * The sleep mode select function is not available for UART2 * Set transmission interrupt factor to "transmission completed" (bit 4 of address 037D16 = "1") Transmission start condition * To start transmission, the following requirements must be met: - Transmit enable bit (bit 0 of address 037D16) = "1" - Transmit buffer empty flag (bit 1 of address 037D16) = "0" Reception start condition * To start reception, the following requirements must be met: - Reception enable bit (bit 2 of address 037D16) = "1" - Detection of a start bit Interrupt request * When transmitting generation timing When data transmission from the UART2 transmit register is completed (bit 4 of address 037D16 = "1") * When receiving When data transfer from the UART2 receive register to the UART2 receive buffer register is completed Error detection * Overrun error (see the specifications of clock-asynchronous serial I/O) (Note 2) * Framing error (see the specifications of clock-asynchronous serial I/O) * Parity error (see the specifications of clock-asynchronous serial I/O) - On the reception side, an "L" level is output from the TXD2 pin by use of the parity error signal output function (bit 7 of address 037D16 = "1") when a parity error is detected - On the transmission side, a parity error is detected by the level of input to the RXD2 pin when a transmission interrupt occurs * The error sum flag (see the specifications of clock-asynchronous serial I/O) Note 1: `n' denotes the value 0016 to FF16 that is set to the UART2 bit rate generator. Note 2: If an overrun error occurs, the UART2 receive buffer will have the next data written in. Note also that the UART2 receive interrupt request bit does not change.
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Tc
Transfer clock Transmit enable bit(TE) Transmit buffer empty flag(TI)
"1" "0" "1" "0" Data is set in UART2 transmit buffer register Note 1
Transferred from UART2 transmit buffer register to UART2 transmit register Start bit Parity bit
D1 D2 D3 D4 D5 D6 D7 P
Stop bit
SP ST D0 D1 D2 D3 D4 D5 D6 D7 P SP
TxD2 RxD2
ST D0
An "L" level returns from TxD2 due to the occurrence of a parity error.
Signal conductor level (Note 2)
"1" Transmit register empty flag (TXEPT) "0" "1" "0"
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
ST D0 D1 D2 D3 D4 D5 D6 D7 The level is detected by the interrupt routine.
P
SP
The level is detected by the interrupt routine.
Transmit interrupt request bit (IR)
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings : * Parity is enabled. * One stop bit. * Transmit interrupt cause select bit = "1". Tc = 16 (n + 1) / fi fi : frequency of BRG2 count source (f1, f8, f32) n : value set to BRG2
Note 1: The transmit is started with overflow timing of BRG after having written in a value at the transmit buffer in the above timing.
Tc
Transfer clock Receive enable bit (RE)
"1" "0"
Start bit
Parity bit
P
Stop bit
SP ST D0 D1 D2 D3 D4 D5 D6 D7 P SP
RxD2 TxD2
ST D0 D1 D2 D3 D4 D5 D6 D7
An "L" level returns from TxD2 due to the occurrence of a parity error.
Signal conductor level (Note 2) Receive complete flag (RI) Receive interrupt request bit (IR)
"1" "0" "1" "0"
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
Read to receive buffer
Read to receive buffer
Cleared to "0" when interrupt request is accepted, or cleared by software Shown in ( ) are bit symbols. The above timing applies to the following settings : * Parity is enabled. * One stop bit. * Transmit interrupt cause select bit = "0". Tc = 16 (n + 1) / fi fi : frequency of BRG2 count source (f1, f8, f32) n : value set to BRG2
Note 2: Equal in waveform because TxD2 and RxD2 are connected.
Figure 1.16.22. Typical transmit/receive timing in UART mode (used for the SIM interface)
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(a) Function for outputting a parity error signal During reception, with the error signal output enable bit (bit 7 of address 037D16) assigned "1", you can output an "L" level from the TXD2 pin when a parity error is detected. And during transmission, comparing with the case in which the error signal output enable bit (bit 7 of address 037D16) is assigned "0", the transmission completion interrupt occurs in the half cycle later of the transfer clock. Therefore parity error signals can be detected by a transmission completion interrupt program. Figure 1.16.23 shows the output timing of the parity error signal.
* LSB first
Transfer clock RxD2 TxD2 Receive complete flag
"H" "L" "H" "L" "H" "L" "1" "0"
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
Hi-Z
ST : Start bit P : Even Parity SP : Stop bit
Figure 1.16.23. Output timing of the parity error signal
(b) Direct format/inverse format Connecting the SIM card allows you to switch between direct format and inverse format. If you choose the direct format, D0 data is output from TxD2. If you choose the inverse format, D7 data is inverted and output from TxD2. Figure 1.16.24 shows the SIM interface format.
Transfer clcck TxD2 (direct) TxD2 (inverse) D0 D1 D2 D3 D4 D5 D6 D7 P
D7
D6
D5
D4
D3
D2
D1
D0
P P : Even parity
Figure 1.16.24. SIM interface format
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Mitsubishi microcomputers
M16C / 30 Group Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Figure 1.16.25 shows the example of connecting the SIM interface. Connect TXD2 and RXD2 and apply pull-up.
Microcomputer
SIM card TxD2 RxD2
Figure 1.16.25. Connecting the SIM interface
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register UART2 Special Mode Register
The UART2 special mode register (address 037716) is used to control UART2 in various ways. Figure 1.16.26 shows the UART2 special mode register. Bit 0 of the UART2 special mode register (037716) is used as the I2C mode select bit. Setting "1" in the I2C mode select bit (bit 0) goes the circuit to achieve the I2C bus (simplified I2C bus) interface effective. Table 1.16.9 shows the relation between the I2C mode select bit and respective control workings. Since this function uses clock-synchronous serial I/O mode, set this bit to "0" in UART mode.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UART2 special mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR
Address 037716
When reset 0016
Bit symbol
IICM ABC BBS LSYN I2C
Bit name
mode select bit
Function (During clock synchronous serial I/O mode) 0 : Normal mode 1 : I2C mode 0 : Update per bit 1 : Update per byte
0 : STOP condition detected 1 : START condition detected
Function (During UART mode)
Must always be "0" Must always be "0"
RW
Arbitration lost detecting flag control bit Bus busy flag SCL L sync output enable bit Bus collision detect sampling clock select bit
Must always be "0"
(Note1)
0 : Disabled 1 : Enabled
Must always be "0"
Must always be "0"
ABSCS
0 : Rising edge of transfer clock 1 : Underflow signal of timer A0
0 : No auto clear function 1 : Auto clear at occurrence of bus collision
ACSE
Auto clear function select bit of transmit enable bit Transmit start condition select bit
SDA digital delay select bit (Note 2, Note 3)
Must always be "0"
SSS
SDDS
Must always be "0"
0 : Analog delay output is selected 1 : Digital delay output is selected (must always be "0" when not using I 2 C mode)
0 : Ordinary 1 : Falling edge of RxD2
Must always be "0"
Note 1: Nothing but "0" may be written. Note 2: When not in I2C mode, do not set this bit by writing a "1". During normal mode, set it to "0". When this bit = "0", UART2 special mode register 3 (U2SMR3 at address 037516) bits 7 to 5 (DL2 to DL0 = SDA digital delay setup bits) are initialized to "000", with the analog delay circuit selected. Also, when SDDS = "0", the U2SMR3 register cannot be read or written to. Note 3: When analog delay is selected, only the analog delay value is effective; when digital delay is selected, only the digital delay value is effective.
UART2 special mode register 3 (I 2 C bus exclusive use register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR3
Address 037516
When reset Indeterminate (However, when SDDS = "1", the initial value is "0016") Function (I 2 C bus exclusive use register) RW
Bit symbol
Bit name
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be indeterminate. However, when SDDS = "1", the value "0" is read out (Note 1) DL0 SDA digital delay setup bit (Note 1, Note 2, Note 3, Note 4)
b7 b6 b5
DL1
DL2
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 : Analog delay is selected 1 : 1 to 2 cycle(s) of 1/f(XIN) 0 : 2 to 3 cycles of 1/f(XIN) 1 : 3 to 4 cycles of 1/f(XIN) 0 : 4 to 5 cycles of 1/f(XIN) 1 : 5 to 6 cycles of 1/f(XIN) 0 : 6 to 7 cycles of 1/f(XIN) 1 : 7 to 8 cycles of 1/f(XIN)
Digital delay is selected
Note 1: This bit can be read or written to when UART2 special mode register (U2SMR at address 037716) bit 7 (SDDS: SDA digital delay select bit) = "1". When the initial value of UART2 special mode register 3 (U2SMR3) is read after setting SDDS = "1", the value is "0016". When writing to UART2 special mode register 3 (U2SMR3) after setting SDDS = "1", be sure to write 0's to bits 0-4. When SDDS = "0", this register cannot be written to; when read, the value is indeterminate. Note 2: These bits are initialized to "000" when SDDS = "0", with the analog delay circuit selected. After a reset, these bits are set to "000", with the analog delay circuit selected. However, because these bits can be read only when SDDS = "1", the value read from these bits when SDDS = "0" is indeterminate. Note 3: When analog delay is selected, only the analog delay value is effective; when digital delay is selected, only the digital delay value is effective. Note 4: The amount of delay varies with the load on SCL and SDA pins. Also, when using an external clock, the amount of delay increases by about 100 ns, so be sure to take this into account when using the device.
Figure 1.16.26. UART2 special mode register
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
P70 through P72 conforming to the simplified I 2C bus
P70/TxD2/SDA
Timer
I/O
Selector
UART2
SDDS=0 or DL=000
IICM=1 (SDDS=0) or DL=000 (SDDS=1) Analog delay IICM=0 or DL000 (SDDS=1)
To DMA0
UART2
Transmission register
IICM=0 or IICM2=1 IICM=1 and IICM2=0
UART2 transmission/ NACK interrupt request
Digital delay (Divider)
SDDS=1 and DL000
SDHI ALS
DQ T Noize Filter
Arbitration To DMA0
IICM=1 Reception register IICM=0 UART2
IICM=1 and IICM2=0
S Q
Timer
IICM=0 or IICM2=1
UART2 reception/ACK interrupt request
Start condition detection Stop condition detection
Falling edge detection P71/RxD2/SCL I/O
Q R R
Bus busy
NACK
D T DQ T Q
L-synchronous output enabling bit
ACK
Data bus
Selector
UART2 IICM=1
Noize Filter Noize Filter
(Port P71 output data latch) Internal clock
SWC2
9th pulse IICM=1 CLK control detection UART2
Bus collision/start, stop condition detection interrupt request
Bus collision
IICM=0
IICM=1
External clock
IICM=0
Falling edge of 9 bit SWC
UART2
Port reading
* With IICM set to 1, the port terminal is to be readable
P72/CLK2
IICM=0
Selector
even if 1 is assigned to P7 1 of the direction register.
I/O
Timer
Figure 1.16.27. Functional block diagram for I2C mode Table 1.16.9. Features in I2C mode
Function 1 2 3 4 5 6 7 8 9 Factor of interrupt number 10 (Note 2) Factor of interrupt number 15 (Note 2) Factor of interrupt number 16 (Note 2) UART2 transmission output delay P70 at the time when UART2 is in use P71 at the time when UART2 is in use P72 at the time when UART2 is in use Noise filter width Reading P71 Normal mode Bus collision detection UART2 transmission UART2 reception Not delayed TxD2 (output) RxD2 (input) CLK2 15ns Reading the terminal when 0 is assigned to the direction register H level (when 0 is assigned to the CLK polarity select bit) I2C mode (Note 1) Start condition detection or stop condition detection No acknowledgment detection (NACK) Acknowledgment detection (ACK) Delayed SDA (input/output) (Note 3) SCL (input/output) P72 50ns Reading the terminal regardless of the value of the direction register The value set in latch P70 when the port is selected
10 Initial value of UART2 output
Note 1: Make the settings given below when I2C mode is in use. Set 0 1 0 in bits 2, 1, 0 of the UART2 transmission/reception mode register. Disable the RTS/CTS function. Choose the MSB First function. Note 2: Follow the steps given below to switch from a factor to another. 1. Disable the interrupt of the corresponding number. 2. Switch from a factor to another. 3. Reset the interrupt request flag of the corresponding number. 4. Set an interrupt level of the corresponding number. Note 3: Set an initial value of SDA transmission output when serial I/O is invalid.
123
Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Figure 1.16.27 shows the functional block diagram for I2C mode. Setting "1" in the I2C mode select bit (IICM) causes ports P70, P71, and P72 to work as data transmission-reception terminal SDA, clock inputoutput terminal SCL, and port P72 respectively. A delay circuit is added to the SDA transmission output, so the SDA output changes after SCL fully goes to "L". The SDA digital delay select bit (bit 7 at address 037716) can be used to select between analog delay and digital delay. When digital delay is selected, the amount of delay can be selected in the range of 2 cycles to 8 cycles of f1 using UART2 special mode register 3 (at address 037516). Delay circuit select conditions are shown in Table 1.16.10. Table 1.16.10. Delay circuit select conditions
Register value Contents IICM
Digital delay is selected
SDDS 1 1
1
DL 001 to 111 000 (000) (000)
When digital delay is selected, no analog delay is added. Only digital delay is effective. When DL is set to "000", analog delay is selected no matter what value is set in SDDS. When SDDS is set to "0", DL is initialized, so that DL ="000".
Analog delay is selected
1 0
No delay
0
0
When IICM = "0", no delay circuit is selected. When IICM = "0", however, always make sure SDDS = "0".
An attempt to read Port P71 (SCL) results in getting the terminal's level regardless of the content of the port direction register. The initial value of SDA transmission output goes to the value set in port P70. The interrupt factors of the bus collision detection interrupt, UART2 transmission interrupt, and of UART2 reception interrupt turn to the start/stop condition detection interrupt, acknowledgment non-detection interrupt, and acknowledgment detection interrupt respectively. The start condition detection interrupt refers to the interrupt that occurs when the falling edge of the SDA terminal (P70) is detected with the SCL terminal (P71) staying "H". The stop condition detection interrupt refers to the interrupt that occurs when the rising edge of the SDA terminal (P70) is detected with the SCL terminal (P71) staying "H". The bus busy flag (bit 2 of the UART2 special mode register) is set to "1" by the start condition detection, and set to "0" by the stop condition detection. The acknowledgment non-detection interrupt refers to the interrupt that occurs when the SDA terminal level is detected still staying "H" at the rising edge of the 9th transmission clock. The acknowledgment detection interrupt refers to the interrupt that occurs when SDA terminal's level is detected already went to "L" at the 9th transmission clock. Bit 1 of the UART2 special mode register (037716) is used as the arbitration lost detecting flag control bit. Arbitration means the act of detecting the nonconformity between transmission data and SDA terminal data at the timing of the SCL rising edge. This detecting flag is located at bit 11 of the UART2 reception buffer register (037F16, 037E16), and "1" is set in this flag when nonconformity is detected. Use the arbitration lost detecting flag control bit to choose which way to use to update the flag, bit by bit or byte by byte. When setting this bit to "1" and updated the flag byte by byte if nonconformity is detected, the arbitration lost detecting flag is set to "1" at the falling edge of the 9th transmission clock. If update the flag byte by byte, must judge and clear ("0") the arbitration lost detecting flag after completing the first byte acknowledge detect and before starting the next one byte transmission. Bit 3 of the UART2 special mode register is used as SCL- and L-synchronous output enable bit. Setting this bit to "1" goes the P71 data register to "0" in synchronization with the SCL terminal level going to "L".
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Some other functions added are explained here. Figure 1.16.28 shows their workings. Bit 4 of the UART2 special mode register is used as the bus collision detect sampling clock select bit. The bus collision detect interrupt occurs when the RXD2 level and TXD2 level do not match, but the nonconformity is detected in synchronization with the rising edge of the transfer clock signal if the bit is set to "0". If this bit is set to "1", the nonconformity is detected at the timing of the overflow of timer A0 rather than at the rising edge of the transfer clock. Bit 5 of the UART2 special mode register is used as the auto clear function select bit of transmit enable bit. Setting this bit to "1" automatically resets the transmit enable bit to "0" when "1" is set in the bus collision detect interrupt request bit (nonconformity). Bit 6 of the UART2 special mode register is used as the transmit start condition select bit. Setting this bit to "1" starts the TxD transmission in synchronization with the falling edge of the RxD terminal.
1. Bus collision detect sampling clock select bit (Bit 4 of the UART2 special mode register)
0: Rising edges of the transfer clock
CLK TxD/RxD
1: Timer A0 overflow
Timer A0
2. Auto clear function select bit of transmt enable bit (Bit 5 of the UART2 special mode register)
CLK TxD/RxD Bus collision detect interrupt request bit Transmit enable bit
3. Transmit start condition select bit (Bit 6 of the UART2 special mode register)
0: In normal state
CLK TxD
Enabling transmission With "1: falling edge of RxD2" selected
CLK TxD RxD
Figure 1.16.28. Some other functions added
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register 2 UART2 Special Mode Register 2
UART2 special mode register 2 (address 037616) is used to further control UART2 in I2C mode. Figure 1.16.29 shows the UART2 special mode register 2.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UART2 special mode register 2 (I 2 C bus exclusive use register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol U2SMR2
Address 037616
When reset 0016
Bit symbol IICM2 CSC SWC ALS STAC SWC2 SDHI
SHTC
Bit name I 2C mode select bit 2 Clock-synchronous bit SCL wait output bit SDA output stop bit UART2 initialization bit SCL wait output bit 2 SDA output disable bit
Start/stop condition control bit
Function Refer to Table 1.16.11 0 : Disabled 1 : Enabled 0 : Disabled 1 : Enabled 0 : Disabled 1 : Enabled
0 : Disabled 1 : Enabled 0: UART2 clock 1: 0 output 0: Enabled 1: Disabled (high impedance) 1: Set this bit to "1" in I2C mode (refer to Table 1.16.12)
RW
Figure 1.16.29. UART2 special mode register 2
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register 2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Bit 0 of the UART2 special mode register 2 (address 037616) is used as the I2C mode select bit 2. Table 1.16.11 shows the types of control to be changed by I2C mode select bit 2 when the I2C mode select bit is set to "1". Table 1.16.12 shows the timing characteristics of detecting the start condition and the stop condition. Set the start/stop condition control bit (bit 7 of UART2 special mode register 2) to "1" in I2C mode.
Table 1.16.11. Functions changed by I2C mode select bit 2
Function 1 Factor of interrupt number 15 2 Factor of interrupt number 16 3 Timing for transferring data from the UART2 reception shift register to the reception buffer. 4 Timing for generating a UART2 reception/ACK interrupt request IICM2 = 0 No acknowledgment detection (NACK) Acknowledgment detection (ACK) The rising edge of the final bit of the reception clock The rising edge of the final bit of the reception clock IICM2 = 1 UART2 transmission (the rising edge of the final bit of the clock) UART2 reception (the falling edge of the final bit of the clock) The falling edge of the final bit of the reception clock The falling edge of the final bit of the reception clock
Table 1.16.12. Timing characteristics of detecting the start condition and the stop condition (Note 1)
3 to 6 cycles < duration for setting-up (Note 2)
3 to 6 cycles < duration for holding (Note 2) Note 1 : When the start/stop condition control bit SHTC is "1" . Note 2 : "Cycles" is in terms of the input oscillation frequency f(XIN) of the main clock. Duration for setting up
SCL SDA
Duration for holding
(Start condition)
SDA
(Stop condition)
127
Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register 2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
P70 through P72 conforming to the simplified I 2C bus
P70/TxD2/SDA
Timer
I/O
Selector
UART2
SDDS=0 or DL=000
IICM=1 (SDDS=0) or DL=000 (SDDS=1) Analog delay IICM=0 or DL000 (SDDS=1)
To DMA0
UART2
Transmission register
IICM=0 or IICM2=1 IICM=1 and IICM2=0
UART2 transmission/ NACK interrupt request
Digital delay (Divider)
SDDS=1 and DL000
SDHI ALS
DQ T Noize Filter
Arbitration To DMA0
IICM=1 Reception register IICM=0 UART2
IICM=1 and IICM2=0
S Q
Timer
IICM=0 or IICM2=1
UART2 reception/ACK interrupt request
Start condition detection Stop condition detection
Falling edge detection P71/RxD2/SCL I/O
Q R R
Bus busy
NACK
D T DQ T Q
L-synchronous output enabling bit
ACK
Data bus
Selector
(Port P71 output data latch) Internal clock UART2 IICM=1
SWC2
9th pulse IICM=1
Bus collision/start, stop condition detection interrupt request
Noize Filter Noize Filter
IICM=1
Bus collision CLK control detection
UART2 Falling edge of 9 bit SWC
IICM=0
External clock
IICM=0
UART2
Port reading
* With IICM set to 1, the port terminal is to be readable
P72/CLK2
IICM=0
Selector
even if 1 is assigned to P7 1 of the direction register.
I/O
Timer
Figure 1.16.30. Functional block diagram for I2C mode
Functions available in I2C mode are shown in Figure 1.16.30 -- a functional block diagram. Bit 3 of the UART2 special mode register 2 (address 037616) is used as the SDA output stop bit. Setting this bit to "1" causes an arbitration loss to occur, and the SDA pin turns to high-impedance state at the instant when the arbitration lost detecting flag is set to "1". Bit 1 of the UART2 special mode register 2 (address 037616) is used as the clock synchronization bit. With this bit set to "1" at the time when the internal SCL is set to "H", the internal SCL turns to "L" if the falling edge is found in the SCL pin; and the baud rate generator reloads the set value, and start counting within the "L" interval. When the internal SCL changes from "L" to "H" with the SCL pin set to "L", stops counting the baud rate generator, and starts counting it again when the SCL pin turns to "H". Due to this function, the UART2 transmission-reception clock becomes the logical product of the signal flowing through the internal SCL and that flowing through the SCL pin. This function operates over the period from the moment earlier by a half cycle than falling edge of the UART2 first clock to the rising edge of the ninth bit. To use this function, choose the internal clock for the transfer clock. Bit 2 of the UART2 special mode register 2 (037616) is used as the SCL wait output bit. Setting this bit to "1" causes the SCL pin to be fixed to "L" at the falling edge of the ninth bit of the clock. Setting this bit to "0" frees the output fixed to "L".
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Mitsubishi microcomputers
M16C / 30 Group UART2 Special Mode Register 2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Bit 4 of the UART2 special mode register 2 (address 037616) is used as the UART2 initialization bit. Setting this bit to "1", and when the start condition is detected, the microcomputer operates as follows. (1) The transmission shift register is initialized, and the content of the transmission register is transferred to the transmission shift register. This starts transmission by dealing with the clock entered next as the first bit. The UART2 output value, however, doesn't change until the first bit data is output after the entrance of the clock, and remains unchanged from the value at the moment when the microcomputer detected the start condition. (2) The reception shift register is initialized, and the microcomputer starts reception by dealing with the clock entered next as the first bit. (3) The SCL wait output bit turns to "1". This turns the SCL pin to "L" at the falling edge of the ninth bit of the clock. Starting to transmit/receive signals to/from UART2 using this function doesn't change the value of the transmission buffer empty flag. To use this function, choose the external clock for the transfer clock. Bit 5 of the UART2 special mode register 2 (037616) is used as the SCL wait output bit 2. Setting this bit to "1" with the serial I/O specified allows the user to forcibly output an "1" from the SCL pin even if UART2 is in operation. Setting this bit to "0" frees the "L" output from the SCL pin, and the UART2 clock is input/ output. Bit 6 of the UART2 special mode register 2 (037616) is used as the SDA output disable bit. Setting this bit to "1" forces the SDA pin to turn to the high-impedance state. Refrain from changing the value of this bit at the rising edge of the UART2 transfer clock. There can be instances in which arbitration lost detecting flag is turned on.
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter A-D Converter
The A-D converter consists of one 10-bit successive approximation A-D converter circuit with a capacitive coupling amplifier. Pins P100 to P107, P95, and P96 also function as the analog signal input pins. The direction registers of these pins for A-D conversion must therefore be set to input. The Vref connect bit (bit 5 at address 03D716) can be used to isolate the resistance ladder of the A-D converter from the reference voltage input pin (VREF) when the A-D converter is not used. Doing so stops any current flowing into the resistance ladder from VREF, reducing the power dissipation. When using the A-D converter, start A-D conversion only after setting bit 5 of 03D716 to connect VREF. The result of A-D conversion is stored in the A-D registers of the selected pins. When set to 10-bit precision, the low 8 bits are stored in the even addresses and the high 2 bits in the odd addresses. When set to 8-bit precision, the low 8 bits are stored in the even addresses. Table 1.17.1 shows the performance of the A-D converter. Figure 1.17.1 shows the block diagram of the A-D converter, and Figures 1.17.2 and 1.17.3 show the A-D converter-related registers. Table 1.17.1. Performance of A-D converter Item Performance Method of A-D conversion Successive approximation (capacitive coupling amplifier) Analog input voltage (Note 1) 0V to AVCC (VCC) Operating clock AD (Note 2) VCC = 5V fAD/divide-by-2 of fAD/divide-by-4 of fAD, fAD=f(XIN) VCC = 3V divide-by-2 of fAD/divide-by-4 of fAD, fAD=f(XIN) Resolution 8-bit or 10-bit (selectable) Absolute precision VCC = 5V * Without sample and hold function 3LSB * With sample and hold function (8-bit resolution) 2LSB * With sample and hold function (10-bit resolution) AN0 to AN7 input : 3LSB ANEX0 and ANEX1 input (including mode in which external operation amp is connected) : 7LSB VCC = 3V * Without sample and hold function (8-bit resolution) 2LSB Operating modes One-shot mode Analog input pins 8pins (AN0 to AN7) + 2pins (ANEX0 and ANEX1) A-D conversion start condition * Software trigger A-D conversion starts when the A-D conversion start flag changes to "1" * External trigger (can be retriggered) A-D conversion starts when the A-D conversion start flag is "1" and the ___________ ADTRG/P97 input changes from "H" to "L" Conversion speed per pin * Without sample and hold function 8-bit resolution: 49 AD cycles, 10-bit resolution: 59 AD cycles * With sample and hold function 8-bit resolution: 28 AD cycles, 10-bit resolution: 33 AD cycles Note 1: Does not depend on use of sample and hold function. Note 2: Divide the frequency if f(XIN) exceeds 10MHZ, and make AD frequency equal to or less than 10MHz. Without sample and hold function, set the AD frequency to 250kHZ min. With the sample and hold function, set the AD frequency to 1MHZ min.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
CKS1=1
fAD 1/2 1/2
CKS0=1 CKS1=0
AD
A-D conversion rate selection
CKS0=0
VREF
VCUT=0
Resistor ladder
AVSS
VCUT=1
Successive conversion register A-D control register 1 (address 03D716)
A-D control register 0 (address 03D616)
Addresses
(03C116, 03C016) (03C316, 03C216) (03C516, 03C416) (03C716, 03C616) (03C916, 03C816) (03CB16, 03CA16) (03CD16, 03CC16) (03CF16, 03CE16)
A-D register 0(16) A-D register 1(16) A-D register 2(16) A-D register 3(16) A-D register 4(16) A-D register 5(16) A-D register 6(16) A-D register 7(16) VIN Comparator Vref Decoder
Data bus high-order Data bus low-order
AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7
CH2,CH1,CH0=000 CH2,CH1,CH0=001 CH2,CH1,CH0=010 CH2,CH1,CH0=011 CH2,CH1,CH0=100 CH2,CH1,CH0=101 CH2,CH1,CH0=110 CH2,CH1,CH0=111
OPA1, OPA0
OPA1,OPA0=0,0
OPA1,OPA0=1,1 OPA0=1
0 0 1 1
0 : Normal operation 1 : ANEX0 0 : ANEX1 1 : External op-amp mode
ANEX0
OPA1,OPA0=0,1
ANEX1
OPA1=1
Figure 1.17.1. Block diagram of A-D converter
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol ADCON0 Bit symbol
CH0
Address 03D616 Bit name
When reset 00000XXX2 Function
b2 b1 b0
RW
Analog input pin select bit
CH1
CH2 MD0 MD1 TRG Trigger select bit A-D conversion start flag Frequency select bit 0 A-D operation mode select bit 0
0 0 0 : AN0 is selected 0 0 1 : AN1 is selected 0 1 0 : AN2 is selected 0 1 1 : AN3 is selected 1 0 0 : AN4 is selected 1 0 1 : AN5 is selected 1 1 0 : AN6 is selected 1 1 1 : AN7 is selected
b4 b3
0 0 : One-shot mode Must not be set except "00" 0 : Software trigger 1 : ADTRG trigger 0 : A-D conversion disabled 1 : A-D conversion started 0 : fAD/4 is selected 1 : fAD/2 is selected
ADST CKS0
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
A-D control register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
0
0
0
Symbol ADCON1 Bit symbol
Reserved bit BITS CKS1 VCUT OPA0 OPA1
Address 03D716 Bit name
When reset 0016 Function
Must always be set to "0" 0 : 8-bit mode 1 : 10-bit mode 0 : fAD/2 or fAD/4 is selected 1 : fAD is selected 0 : Vref not connected 1 : Vref connected
b7 b6
RW
8/10-bit mode select bit Frequency select bit 1 Vref connect bit External op-amp connection mode bit
0 0 : ANEX0 and ANEX1 are not used 0 1 : ANEX0 input is A-D converted 1 0 : ANEX1 input is A-D converted 1 1 : External op-amp connection mode
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
Figure 1.17.2. A-D converter-related registers (1)
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A-D control register 2 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON2
Address
03D416
When reset
0000XXX02
000
Bit symbol
SMP Reserved bit
Bit name
A-D conversion method select bit
Function
0 : Without sample and hold 1 : With sample and hold Must always be set to "0"
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0". Note: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
A-D register i
(b15) b7 (b8) b0 b7
Symbol
ADi(i=0 to 7)
Address When reset 03C016 to 03CF16 Indeterminate
b0
Function
Eight low-order bits of A-D conversion result * During 10-bit mode Two high-order bits of A-D conversion result * During 8-bit mode When read, the content is indeterminate Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
RW
Figure 1.17.3. A-D converter-related registers (2)
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter (1) One-shot mode
In one-shot mode, the pin selected using the analog input pin select bit is used for one-shot A-D conversion. Table 1.17.2 shows the specifications of one-shot mode. Figure 1.17.4 shows the A-D control register in one-shot mode. Table 1.17.2. One-shot mode specifications Item Function Start condition Stop condition Specification The pin selected by the analog input pin select bit is used for one A-D conversion Writing "1" to A-D conversion start flag * End of A-D conversion (A-D conversion start flag changes to "0", except when external trigger is selected) * Writing "0" to A-D conversion start flag End of A-D conversion One of AN0 to AN7, as selected Read A-D register corresponding to selected pin
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt request generation timing Input pin Reading of result of A-D converter
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol ADCON0 Bit symbol
CH0
Address 03D616 Bit name
When reset 00000XXX2 Function
b2 b1 b0
RW
Analog input pin select bit
CH1 CH2 MD0 MD1 TRG ADST CKS0 A-D operation mode select bit 0 Trigger select bit A-D conversion start flag Frequency select bit 0
0 0 0 : AN0 is selected 0 0 1 : AN1 is selected 0 1 0 : AN2 is selected 0 1 1 : AN3 is selected 1 0 0 : AN4 is selected 1 0 1 : AN5 is selected 1 1 0 : AN6 is selected 1 1 1 : AN7 is selected
b4 b3
0 0 : One-shot mode 0 : Software trigger 1 : ADTRG trigger 0 : A-D conversion disabled 1 : A-D conversion started 0: fAD/4 is selected 1: fAD/2 is selected
Note : If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
A-D control register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
1
000
Symbol ADCON1 Bit symbol
Reserved bit BITS CKS1 VCUT OPA0 OPA1
Address 03D716 Bit name
When reset 0016 Function
Must always be set to "0" 0 : 8-bit mode 1 : 10-bit mode 0 : fAD/2 or fAD/4 is selected 1 : fAD is selected 1 : Vref connected
b7 b6
RW
8/10-bit mode select bit Frequency select bit1 Vref connect bit External op-amp connection mode bit
0 0 : ANEX0 and ANEX1 are not used 0 1 : ANEX0 input is A-D converted 1 0 : ANEX1 input is A-D converted 1 1 : External op-amp connection mode
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
Figure 1.17.4. A-D conversion register in one-shot mode
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Mitsubishi microcomputers
M16C / 30 Group A-D Converter (a) Sample and hold
Sample and hold is selected by setting bit 0 of the A-D control register 2 (address 03D416) to "1". When sample and hold is selected, the rate of conversion of each pin increases. As a result, a 28 AD cycle is achieved with 8-bit resolution and 33 AD with 10-bit resolution. Sample and hold can be selected in all modes. However, in all modes, be sure to specify before starting A-D conversion whether sample and hold is to be used.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(b) Extended analog input pins
In one-shot mode and repeat mode, the input via the extended analog input pins ANEX0 and ANEX1 can also be converted from analog to digital. When bit 6 of the A-D control register 1 (address 03D716) is "1" and bit 7 is "0", input via ANEX0 is converted from analog to digital. The result of conversion is stored in A-D register 0. When bit 6 of the A-D control register 1 (address 03D716) is "0" and bit 7 is "1", input via ANEX1 is converted from analog to digital. The result of conversion is stored in A-D register 1.
(c) External operation amp connection mode
In this mode, multiple external analog inputs via the extended analog input pins, ANEX0 and ANEX1, can be amplified together by just one operation amp and used as the input for A-D conversion. When bit 6 of the A-D control register 1 (address 03D716) is "1" and bit 7 is "1", input via AN0 to AN7 is output from ANEX0. The input from ANEX1 is converted from analog to digital and the result stored in the corresponding A-D register. The speed of A-D conversion depends on the response of the external operation amp. Do not connect the ANEX0 and ANEX1 pins directly. Figure 1.17.5 is an example of how to connect the pins in external operation amp mode.
Resistor ladder
Successive conversion register
Analog input
AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7
ANEX0
ANEX1
Comparator External op-amp
Figure 1.17.5. Example of external op-amp connection mode
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Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Programmable I/O Ports
There are 87 programmable I/O ports: P0 to P10 (excluding P85). Each port can be set independently for input or output using the direction register. A pull-up resistance for each block of 4 ports can be set. P85 is an input-only port and has no built-in pull-up resistance. Figures 1.20.1 to 1.20.4 show the programmable I/O ports. Figure 1.20.5 shows the I/O pins. Each pin functions as a programmable I/O port and as the I/O for the built-in peripheral devices. To use the pins as the inputs for the built-in peripheral devices, set the direction register of each pin to input mode. When the pins are used as the outputs for the built-in peripheral devices (other than the D-A converter), they function as outputs regardless of the contents of the direction registers. When pins are to be used as the outputs for the D-A converter, do not set the direction registers to output mode. See the descriptions of the respective functions for how to set up the built-in peripheral devices.
(1) Direction registers
Figure 1.20.6 shows the direction registers. These registers are used to choose the direction of the programmable I/O ports. Each bit in these registers corresponds one for one to each I/O pin. In memory expansion and microprocessor mode, the contents of corresponding direction register of pins _______ _______ _____ ________ ______ ________ _______ _______ __________ _________ A0 to A19, D0 to D15, CS0 to CS3, RD, WRL/WR, WRH/BHE, ALE, RDY, HOLD, HLDA and BCLK cannot be modified. Note: There is no direction register bit for P85.
(2) Port registers
Figure 1.20.7 shows the port registers. These registers are used to write and read data for input and output to and from an external device. A port register consists of a port latch to hold output data and a circuit to read the status of a pin. Each bit in port registers corresponds one for one to each I/O pin. In memory expansion and microprocessor mode, the contents of corresponding port register of pins A0 to _______ ________ _____ ________ ______ ________ ________ _______ __________ _________ A19, D0 to D15, CS0 to CS3, RD, WRL/WR, WRH/BHE, ALE, RDY, HOLD, HLDA and BCLK cannot be modified.
(3) Pull-up control registers
Figure 1.20.8 shows the pull-up control registers. The pull-up control register can be set to apply a pull-up resistance to each block of 4 ports. When ports are set to have a pull-up resistance, the pull-up resistance is connected only when the direction register is set for input. However, in memory expansion mode and microprocessor mode, the pull-up control register of P0 to P3, P40 to P43, and P5 is invalid. The contents of register can be changed, but the pull-up resistance is not connected.
(4) Port control register
Figure 1.20.9 shows the port control register. The bit 0 of port control register is used to read port P1 as follows: 0 : When port P1 is input port, port input level is read. When port P1 is output port , the contents of port P1 register is read. 1 : The contents of port P1 register is read always. This register is valid in the following: * External bus width is 8 bits in microprocessor mode or memory expansion mode. * Port P1 can be used as a port in multiplexed bus for the entire space.
136
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up selection Direction register P00 to P07, P20 to P27, P30 to P37, P40 to P47, P50 to P54, P56 Data bus Port latch (Note)
Pull-up selection P10 to P14 Direction register
Port P1 control register
Data bus
Port latch (Note)
Pull-up selection P15 to P17 Direction register
Port P1 control register
Data bus
Port latch (Note)
Input to respective peripheral functions Pull-up selection P57, P60, P61, P64, P65, P72, P73, P74 Data bus Direction register
"1"
Output
Port latch (Note)
Input to respective peripheral functions
Note:
symbolizes a parasitic diode. Do not apply a voltage higher than Vcc to each port.
Figure 1.20.1. Programmable I/O ports (1)
137
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up selection P82 to P84 Direction register
Data bus
Port latch (Note1)
Input to respective peripheral functions
Pull-up selection P76, P77, P80, P81, P90, P93, P94 (inside dotted-line not included) P55, P62, P66, P75, P91, P92, P97 (inside dotted-line included) Data bus Direction register
Port latch (Note1)
Input to respective peripheral functions (Note 2)
Pull-up selection P63, P67 Direction register "1" Data bus Port latch Output (Note1)
P85 Data bus NMI interrupt input (Note1)
Note 1:
symbolizes a parasitic diode. Do not apply a voltage higher than Vcc to each port.
Note 2: In a part of port, the input to a respective peripheral functions does not exist, but schmitt circuit exists.
Figure 1.20.2. Programmable I/O ports (2)
138
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
P70, P71
Direction register "1" Data bus Port latch Output (Note 2)
Input to respective peripheral functions
P96, P100 to P103 (inside dotted-line not included) P95, P104 to P107 (inside dotted-line included)
Pull-up selection Direction register
Data bus
Port latch (Note 1)
Analog input Input to respective peripheral functions
Note 1:
symbolizes a parasitic diode. Do not apply a voltage higher than Vcc to each port. Note 2: symbolizes a parasitic diode.
Figure 1.20.3. Programmable I/O ports (3)
139
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up selection Direction register P87
Data bus
Port latch (Note)
fc
Rf
Pull-up selection P86 Direction register "1" Data bus Port latch Output (Note)
Rd
Note :
symbolizes a parasitic diode. Do not apply a voltage higher than Vcc to each port.
Figure 1.20.4. Programmable I/O ports (4)
BYTE
BYTE signal input
(Note)
CNVSS
CNVSS signal input
(Note)
RESET
RESET signal input
(Note)
Note :
symbolizes a parasitic diode. Do not apply a voltage higher than Vcc to each pin.
Figure 1.20.5. I/O pins
140
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port Pi direction register (Note 1, 2)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PDi (i = 0 to 10, except 8) Bit symbol
PDi_0 PDi_1 PDi_2 PDi_3 PDi_4 PDi_5 PDi_6 PDi_7
Address 03E216, 03E316, 03E616, 03E716, 03EA16 03EB16, 03EE16, 03EF16, 03F316, 03F616 Function
0 : Input mode (Functions as an input port) 1 : Output mode (Functions as an output port) (i = 0 to 10 except 8)
When reset 0016 0016
Bit name
Port Pi0 direction register Port Pi1 direction register Port Pi2 direction register Port Pi3 direction register Port Pi4 direction register Port Pi5 direction register Port Pi6 direction register Port Pi7 direction register
RW
Note 1: Set bit 2 of protect register (address 000A16) to "1" before rewriting to the port P9 direction register. Note 2: In memory expansion and microprocessor mode, the contents of corresponding port Pi direction register of pins A0 to A19, D0 to D15, CS0 to CS3, RD, WRL/WR, WRH/BHE, ALE, RDY, HOLD, HLDA and BCLK cannot be modified.
Port P8 direction register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PD8
Address 03F216 Bit name
Port P80 direction register Port P81 direction register Port P82 direction register Port P83 direction register
When reset 00X000002 Function
0 : Input mode (Functions as an input port) 1 : Output mode (Functions as an output port)
Bit symbol
PD8_0 PD8_1 PD8_2 PD8_3
RW
PD8_4 Port P84 direction register Nothing is assigned. In an attempt to write to this bit, write "0". The value, if read, turns out to be indeterminate. PD8_6 PD8_7 Port P86 direction register Port P87 direction register 0 : Input mode (Functions as an input port) 1 : Output mode (Functions as an output port)
Figure 1.20.6. Direction register
141
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port Pi register (Note 2)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol Pi (i = 0 to 10, except 8)
Address 03E016, 03E116, 03E416, 03E516, 03E816 03E916, 03EC16, 03ED16, 03F116, 03F416 Function
Data is input and output to and from each pin by reading and writing to and from each corresponding bit 0 : "L" level data 1 : "H" level data (Note 1) (i = 0 to 10 except 8)
When reset Indeterminate Indeterminate RW
Bit symbol
Pi_0 Pi_1 Pi_2 Pi_3 Pi_4 Pi_5 Pi_6 Pi_7
Bit name
Port Pi0 register Port Pi1 register Port Pi2 register Port Pi3 register Port Pi4 register Port Pi5 register Port Pi6 register Port Pi7 register
Note 1: Since P70 and P71 are N-channel open drain ports, the data is high-impedance. Note 2: In memory expansion and microprocessor mode, the contents of corresponding port Pi register of pins A0 to A19, D0 to D15, CS0 to CS3, RD, WRL/WR, WRH/BHE, ALE, RDY, HOLD, HLDA and BCLK cannot be modified.
Port P8 register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol P8 Bit symbol
P8_0 P8_1 P8_2 P8_3 P8_4 P8_5 P8_6 P8_7
Address 03F016 Bit name
Port P80 register Port P81 register Port P82 register Port P83 register Port P84 register Port P85 register Port P86 register Port P87 register
When reset Indeterminate Function
Data is input and output to and from each pin by reading and writing to and from each corresponding bit (except for P85) 0 : "L" level data 1 : "H" level data
RW
Figure 1.20.7. Port register
142
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PUR0
Bit symbol
PU00 PU01 PU02 PU03 PU04 PU05 PU06 PU07
Address 03FC16
Bit name
P00 to P03 pull-up P04 to P07 pull-up P10 to P13 pull-up P14 to P17 pull-up P20 to P23 pull-up P24 to P27 pull-up P30 to P33 pull-up P34 to P37 pull-up
When reset 0016
Function
The corresponding port is pulled high with a pull-up resistor 0 : Not pulled high 1 : Pulled high
RW
Note : In memory expansion and microprocessor mode, the content of this register can be changed, but the pull-up resistance is not connected.
Pull-up control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PUR1
Bit symbol
PU10 PU11 PU12 PU13 PU14 PU15 PU16
Address 03FD16
Bit name
When reset 0016 (Note 2)
Function
RW
P40 to P43 pull-up (Note 3) The corresponding port is pulled high with a pull-up resistor P44 to P47 pull-up 0 : Not pulled high P50 to P53 pull-up (Note 3) 1 : Pulled high P54 to P57 pull-up (Note 3) P60 to P63 pull-up P64 to P67 pull-up P72 to P73 pull-up (Note 1)
PU17 P74 to P77 pull-up Note 1: Since P70 and P71 are N-channel open drain ports, pull-up is not available for them. Note 2: When the VCC level is being impressed to the CNVSS terminal, this register becomes to 0216 when reset (PU11 becomes to "1"). Note 3: In memory expansion and microprocessor mode, the content of these bits can be changed, but the pull-up resistance is not connected.
Pull-up control register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol PUR2
Bit symbol
PU20 PU21 PU22 PU23 PU24 PU25
Address 03FE16
Bit name
P80 to P83 pull-up P84 to P87 pull-up (Except P85) P90 to P93 pull-up P94 to P97 pull-up P100 to P103 pull-up P104 to P107 pull-up
When reset 0016
Function
The corresponding port is pulled high with a pull-up resistor 0 : Not pulled high 1 : Pulled high
RW
Nothing is assigned. In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
Figure 1.20.8. Pull-up control register
143
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbpl PCR
Address 03FF16
When reset 0016
Bit symbol
PCR0
Bit name
Port P1 control register
Function
0 : When input port, read port input level. When output port, read the contents of port P1 register. 1 : Read the contents of port P1 register though input/output port.
RW
Nothing is assigned.
In an attempt to write to these bits, write "0". The value, if read, turns out to be "0".
Figure 1.20.9. Port control register
144
Mitsubishi microcomputers
M16C / 30 Group Programmable I/O Port
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.20.1. Example connection of unused pins in single-chip mode
Pin name Ports P0 to P10 (excluding P85) XOUT (Note) NMI AVCC AVSS, VREF, BYTE Connection After setting for input mode, connect every pin to VSS via a resistor (pull-down); or after setting for output mode, leave these pins open. Open Connect via resistor to VCC (pull-up) Connect to VCC Connect to VSS
Note: With external clock input to XIN pin.
Table 1.20.2. Example connection of unused pins in memory expansion mode and microprocessor mode
Pin name Ports P6 to P10 (excluding P85) P45 / CS1 to P47 / CS3 Connection After setting for input mode, connect every pin to VSS via a resistor (pull-down); or after setting for output mode, leave these pins open. Set ports to input mode, set output enable bits of CS1 through CS3 to 0, and connect to Vcc via resistors (pull-up). Open
BHE, ALE, HLDA, XOUT (Note 1), BCLK (Note 2) HOLD, RDY, NMI AVCC AVSS, VREF
Connect via resistor to VCC (pull-up) Connect to VCC Connect to VSS
Note 1: With external clock input to XIN pin. Note 2: When the BCLK output disable bit (bit 7 at address 000416) is set to "1", connect to VCC via a resistor (pull-up).
Microcomputer
Port P0 to P10 (except for P85) (Input mode) * * * (Input mode) (Output mode)
* * *
Microcomputer
Port P6 to P10 (except for P85) (Input mode) * * * (Input mode) (Output mode)
* * *
Open
Open
NMI XOUT AVCC BYTE AVSS VREF Open VCC
NMI BHE Port P45 / CS1 HLDA to P47 / CS3 ALE XOUT BCLK (Note) HOLD RDY AVCC AVSS VREF VSS
Open VCC
VSS
In single-chip mode
In memory expansion mode or in microprocessor mode
Note : When the BCLK output disable bit (bit 7 at address 000416) is set to "1", connect to VCC via a resistor (pull-up).
Figure 1.20.10. Example connection of unused pins
145
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics
Electrical characteristics
Table 1.23.1. Absolute maximum ratings
Symbol
Vcc AVcc
Supply voltage Analog supply voltage RESET, CNVSS, BYTE, Input P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P87, P90 to P97, P100 to P107, VREF, XIN P70, P71 Output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37,P40 to P47, P50 to P57,
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Parameter
Condition
VCC=AVCC VCC=AVCC
Rated value
-0.3 to 6.5 -0.3 to 6.5
Unit
V V
-0.3 to Vcc+0.3
VI
V
-0.3 to 6.5
V
VO
P60 to P67,P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107, XOUT P70, P71
Power dissipation Operating ambient temperature Storage temperature
-0.3 to Vcc+0.3
V
Pd Topr Tstg
Topr=25 C
-0.3 to 6.5 300 -20 to 85 / -40 to 85 (Note) -65 to 150
V mW C C
Note : Specify a product of -40C to 85C to use it.
146
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.23.2. Recommended operating conditions (referenced to VCC = 2.7V to 5.5V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 3) unless otherwise specified) Standard Symbol Unit Parameter Typ. Min Max.
Vcc AVcc Vss AVss
Supply voltage Analog supply voltage Supply voltage Analog supply voltage
HIGH input P31 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P87, P90 to P97, P100 to P107, voltage XIN, RESET, CNVSS, BYTE P70 , P71 P00 to P07, P10 to P17, P20 to P27, P30 (during single-chip mode) P00 to P07, P10 to P17, P20 to P27, P30
(data input function during memory expansion and microprocessor modes)
2.7
5.0 Vcc 0 0
5.5
V V V V V V V V V V V mA
VIH
0.8Vcc 0.8Vcc 0.8Vcc 0.5Vcc 0 0 0
Vcc 6.5 Vcc Vcc 0.2Vcc 0.2Vcc 0.16Vcc -10.0
LOW input voltage VIL
P31 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P87, P90 to P97, P100 to P107, XIN, RESET, CNVSS, BYTE P00 to P07, P10 to P17, P20 to P27, P30 (during single-chip mode) P00 to P07, P10 to P17, P20 to P27, P30
(data input function during memory expansion and microprocessor modes)
HIGH peak output I OH (peak) current HIGH average output current
I OH (avg)
LOW peak output I OL (peak) current I OL (avg) LOW average output current
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107
-5.0
mA
10.0 5.0 0 0 0 0 32.768 16
mA mA MHz
No wait
f (XIN)
Vcc=4.2V to 5.5V Vcc=2.7V to 4.2V Vcc=4.2V to 5.5V Vcc=2.7V to 4.2V
Main clock input oscillation frequency (Note 4) Subclock oscillation frequency
With wait
7.33 X Vcc MHz -14.791 MHz 16 4 X Vcc -0.8 50 MHz kHz
f (XcIN)
Note 1: The mean output current is the mean value within 100ms. Note 2: The total IOL (peak) for ports P0, P1, P2, P86, P87, P9, and P10 must be 80mA max. The total IOH (peak) for ports P0, P1, P2, P86, P87, P9, and P10 must be 80mA max. The total IOL (peak) for ports P3, P4, P5, P6, P7, and P80 to P84 must be 80mA max. The total IOH (peak) for ports P3, P4, P5, P6, P72 to P77, and P80 to P84 must be 80mA max. Note 3: Specify a product of -40C to 85C to use it. Note 4: Relationship between main clock oscillation frequency and supply voltage.
Main clock input oscillation frequency (No wait)
Operating maximum frequency [MHZ]
Main clock input oscillation frequency (With wait)
Operating maximum frequency [MHZ]
16.0
7.33 X VCC - 14.791MHZ
16.0
4 X VCC - 0.8MHZ
10.0
5.0
0.0 2.7 4.2
Supply voltage[V]
0.0 2.7 4.2
Supply voltage[V]
5.5
5.5
(BCLK: no division)
(BCLK: no division)
147
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.23.3. A-D conversion characteristics (referenced to VCC = AVCC = VREF = 2.7V to 5.5V, Vss = AVSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 4) unless otherwise specified)
Symbol Resolution
Absolute accuracy
Sample & hold function not available Sample & hold function available(10bit)
Parameter
Measuring condition
VREF = VCC
VREF = VCC = 5V AN0 to AN7 input VREF =VCC ANEX0, ANEX1 input, = 5V External op-amp connection mode VREF = VCC = 5V
Standard Min. Typ. Max.
10 3 3 7 2 2 40
Unit
Bits LSB LSB LSB LSB LSB k s s s s
Sample & hold function available(8bit)
Sample & hold function not available(8bit) VREF = VCC = 3V, OAD = fAD/2
RLADDER tCONV tCONV tCONV tSAMP VREF VIA
Ladder resistance
Conversion time(10bit), Sample & hold function available Conversion time(8bit), Sample & hold function available Conversion time(8bit), Sample & hold function not available
VREF = VCC
VREF = VCC = 5V, OAD =10MHz VREF = VCC = 5V, OAD =10MHz VREF = VCC = 3V, OAD = fAD/2 = 5MHz
10 3.3 2.8 9.8 0.3 2.7 0
Sampling time Reference voltage Analog input voltage
VCC VREF
V V
Note 1: Do f(X IN) in range of main clock input oscillation frequency prescribed with recommended operating conditions of table 1.23.2. Divide the f AD if f(XIN) exceeds 10MHz, and make AD operation clock frequency (OAD) equal to or lower than 10MHz. And divide the f AD if VCC is less than 4.2V, and make AD operation clock frequency (OAD) equal to or lower than f AD/2. Note 2: A case without sample & hold function turn AD operation clock frequency (OAD) into 250 kHz or more in addition to a limit of Note 1. A case with sample & hold function turn AD operation clock frequency (OAD) into 1MHz or more in addition to a limit of Note 1. Note 3: Connect AV CC pin to VCC pin and apply the same electric potential. Note 4: Specify a product of -40C to 85C to use it.
148
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Table 1.23.6. Electrical characteristics (referenced to VCC = 4.2V to 5.5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 2), f(XIN) = 16MHZ unless otherwise specified)
Symbol Parameter Measuring condition Min
3 .0
Standard Typ. Max.
Unit
VOH
HIGH output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, IOH = -5mA, VCC=5.0V P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 HIGH output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, IOH = -200A, VCC=5.0V P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 HIGH output voltage HIGH output voltage XOUT XCOUT
HIGHPOWER LOWPOWER HIGHPOWER LOWPOWER
V
VOH
4 .7
V
IOH = -1mA, VCC=5.0V IOH = -0.5mA, VCC=5.0V With no load applied, VCC=5.0V With no load applied, VCC=5.0V
3 .0 3 .0 3 .0 1.6
V V
VOH
VOL
LOW output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 LOW output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 LOW output voltage LOW output voltage Hysteresis XOUT XCOUT
HIGHPOWER LOWPOWER HIGHPOWER LOWPOWER
IOL = 5mA, VCC=5.0V
2.0
V
VOL
IOL = 200A, VCC=5.0V
0.45
V
VOL
IOL = 1mA, VCC=5.0V IOL = 0.5mA, VCC=5.0V With no load applied, VCC=5.0V With no load applied, VCC=5.0V 0 0
2.0 2.0
V V
VT+-VT-
HOLD, RDY, TA0IN to TA2IN, TB1IN, TB2IN, INT0 to INT2, NMI, ADTRG, CTS0 to CTS2, SCL, SDA, CLK0 to CLK4,TA2OUT, KI0 to KI3, RxD0 to RxD2 RESET
VCC=5.0V
0 .2
1.0
V
VT+-VT-
Hysteresis
VCC=5.0V
0.2
1.8
V
IIH
HIGH input P00 to P07, P10 to P17, P20 to P27, current P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P87, P90 to P97, P100 to P107, XIN, RESET, CNVss, BYTE LOW input current P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P87, P90 to P97, P100 to P107, XIN, RESET, CNVss, BYTE P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107
VI = 5V, VCC=5.0V
5 .0
A
I IL
VI = 0V, VCC=5.0V
-5.0
A
RPULLUP
Pull-up resistance
VI = 0V, VCC=5.0V
30.0
50.0
167.0
k
RfXIN RfXCIN V
RAM
Feedback resistance XIN Feedback resistance XCIN RAM retention voltage In single-chip mode, the output pins are open and other pins are VSS When clock is stopped f(XIN) = 16MHz
Square wave, no division
1.0 6.0 2 .0 30.0 90.0 10 (Topr = 25C) 1 .0 50.0
M M V mA A A
f(XCIN) = 32kHz
Square wave
Icc
Power supply current
f(XCIN) = 32kHz
When a WAIT instruction is executed (Note 1)
4 .0
Topr = 25C when clock is stopped Topr = 85C when clock is stopped Note 1: With one timer operated using fC32. Note 2: Specify a product of -40C to 85C to use it.
A 20.0
149
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.7. External clock input
Symbol
tc tw(H) tw(L) tr tf
Parameter
External clock input cycle time External clock input HIGH pulse width External clock input LOW pulse width External clock rise time External clock fall time
Standard Min. Max.
62.5 25 25 15 15
Unit
ns ns ns ns ns
Table 1.23.8. Memory expansion and microprocessor modes
Symbol
tac1(RD-DB) tac2(RD-DB) tac3(RD-DB) tsu(DB-RD) tsu(RDY-BCLK ) tsu(HOLD-BCLK ) th(RD-DB) th(BCLK -RDY) th(BCLK-HOLD ) td(BCLK-HLDA )
Parameter
Data input access time (no wait) Data input access time (with wait) Data input access time (when accessing multiplex bus area) Data input setup time RDY input setup time HOLD input setup time Data input hold time RDY input hold time HOLD input hold time HLDA output delay time
Standard Max. Min.
(Note) (Note) (Note)
40 30 40 0 0 0 40
Unit
ns ns ns ns ns ns ns ns ns ns
Note: Calculated according to the BCLK frequency as follows:
tac1(RD - DB) = tac2(RD - DB) = tac3(RD - DB) =
10 9 - 45 f(BCLK) X 2 3 X 10 - 45 f(BCLK) X 2 3 X 10 - 45 f(BCLK) X 2
9 9
[ns]
[ns] [ns]
150
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.9. Timer A input (counter input in event counter mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Min. Max. 100 40 40 Unit ns ns ns
Table 1.23.10. Timer A input (gating input in timer mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Max. Min. 400 200 200 Unit ns ns ns
Table 1.23.11. Timer A input (external trigger input in one-shot timer mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Min. Standard Max. Unit ns ns ns
200 100 100
Table 1.23.12. Timer A input (external trigger input in pulse width modulation mode)
Symbol tw(TAH) tw(TAL) TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Max. Min. 100 100 Unit ns ns
Table 1.23.13. Timer A input (up/down input in event counter mode)
Symbol tc(UP) tw(UPH) tw(UPL) tsu(UP-TIN) th(TIN-UP) TAiOUT input cycle time TAiOUT input HIGH pulse width TAiOUT input LOW pulse width TAiOUT input setup time TAiOUT input hold time Parameter Standard Min. Max. 2000 1000 1000 400 400 Unit ns ns ns ns ns
151
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.14. Timer B input (counter input in event counter mode)
Symbol tc(TB) tw(TBH) tw(TBL) tc(TB) tw(TBH) tw(TBL) Parameter TBiIN input cycle time (counted on one edge) TBiIN input HIGH pulse width (counted on one edge) TBiIN input LOW pulse width (counted on one edge) TBiIN input cycle time (counted on both edges) TBiIN input HIGH pulse width (counted on both edges) TBiIN input LOW pulse width (counted on both edges) Standard Min. 100 40 40 200 80 80 Max. Unit ns ns ns ns ns ns
Table 1.23.15. Timer B input (pulse period measurement mode)
Symbol tc(TB) tw(TBH) tw(TBL) TBiIN input cycle time TBiIN input HIGH pulse width TBiIN input LOW pulse width Parameter Standard Min. 400 200 200 Max. Unit ns ns ns
Table 1.23.16. Timer B input (pulse width measurement mode)
Symbol tc(TB) tw(TBH) tw(TBL) TBiIN input cycle time TBiIN input HIGH pulse width TBiIN input LOW pulse width Parameter Standard Min. 400 200 200 Max. Unit ns ns ns
Table 1.23.17. A-D trigger input
Symbol tc(AD) tw(ADL) Parameter ADTRG input cycle time (trigger able minimum) ADTRG input LOW pulse width Standard Min. 1000 125 Max. Unit ns ns
Table 1.23.18. Serial I/O
Symbol tc(CK) tw(CKH) tw(CKL) td(C-Q) th(C-Q) tsu(D-C) th(C-D) CLKi input cycle time CLKi input HIGH pulse width CLKi input LOW pulse width TxDi output delay time TxDi hold time RxDi input setup time RxDi input hold time
_______
Parameter
Standard Min. 200 100 100 80 0 30 90 Max.
Unit ns ns ns ns ns ns ns
Table 1.23.19. External interrupt INTi inputs
Symbol tw(INH) tw(INL) INTi input HIGH pulse width INTi input LOW pulse width Parameter Standard Min. 250 250 Max. Unit ns ns
152
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Switching characteristics (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 3), CM15 = "1" unless otherwise specified) Table 1.23.20. Memory expansion mode and microprocessor mode (no wait)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) td(BCLK-ALE) th(BCLK-ALE) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) ALE signal output delay time ALE signal output hold time RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard)(Note2) 10 9 - 40 f(BCLK) X 2
Measuring condition
Standard Min. Max.
25 4 0 0 25 4 25
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Figure 1.23.1
-4 25 0 25 0 40 4
(Note1)
0
Note 1: Calculated according to the BCLK frequency as follows:
td(DB - WR) = [ns]
Note 2: This is standard value shows the timing when the output is off, and doesn't show hold time of data bus. Hold time of data bus is different by capacitor volume and pull-up (pull-down) resistance value. Hold time of data bus is expressed in t = -CR X ln (1 - VOL / VCC) by a circuit of the right figure. For example, when VOL = 0.2VCC, C = 30pF, R = 1k, hold time of output "L" level is t = - 30pF X 1k X ln (1 - 0.2VCC / VCC) = 6.7ns. Note 3: Specify a product of -40C to 85C to use it.
R DBi C
P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10
30pF
Figure 1.23.1. Port P0 to P10 measurement circuit
153
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Switching characteristics (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 3), CM15 = "1" unless otherwise specified) Table 1.23.21. Memory expansion mode and microprocessor mode (with wait, accessing external memory)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) td(BCLK-ALE) th(BCLK-ALE) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) ALE signal output delay time ALE signal output hold time RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard)(Note2) 10 9 f(BCLK)
Measuring condition
Standard Min. Max.
25 4 0 0 25 4 25
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Figure 1.23.1
-4 25 0 25 0 40 4 (Note1) 0
Note 1: Calculated according to the BCLK frequency as follows:
td(DB - WR) = - 40 [ns]
Note 2: This is standard value shows the timing when the output is off, and doesn't show hold time of data bus. Hold time of data bus is different by capacitor volume and pull-up (pull-down) resistance value. Hold time of data bus is expressed in t = -CR X ln (1 - VOL / VCC) by a circuit of the right figure. For example, when VOL = 0.2VCC, C = 30pF, R = 1k, hold time of output "L" level is t = - 30pF X 1k X ln (1 - 0.2VCC / VCC) = 6.7ns. Note 3: Specify a product of -40C to 85C to use it.
R DBi C
154
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Switching characteristics (referenced to VCC = 5V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 2), CM15 = "1" unless otherwise specified) Table 1.23.22. Memory expansion mode and microprocessor mode (with wait, accessing external memory, multiplex bus area selected)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) th(RD-CS) th(WR-CS) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB) td(BCLK-ALE) th(BCLK-ALE) td(AD-ALE) th(ALE-AD) td(AD-RD) td(AD-WR) tdZ(RD-AD)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) Chip select output hold time (RD standard) Chip select output hold time (WR standard) RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard) ALE signal output delay time (BCLK standard) ALE signal output hold time (BCLK standard) ALE signal output delay time (Address standard) ALE signal output hold time (Adderss standard) Post-address RD signal output delay time Post-address WR signal output delay time Address output floating start time 10 9 f(BCLK) X 2 10 f(BCLK) X 2 10 9 f(BCLK) X 2 10 f(BCLK) X 2 10 X 3 - 40 f(BCLK) X 2 10 f(BCLK) X 2 10 9 - 25 f(BCLK) X 2
9 9 9 9
Measuring condition
Standard Min. Max.
25 4
(Note1) (Note1)
Unit
ns ns ns ns
25 4
(Note1) (Note1)
ns ns ns ns ns ns ns ns ns ns ns
25
Figure 1.23.1
0 25 0 40 4
(Note1) (Note1)
25 -4
(Note1)
ns ns ns ns ns ns
30 0 0 8
ns ns
Note 1: Calculated according to the BCLK frequency as follows:
th(RD - AD) = [ns]
th(WR - AD) =
[ns]
th(RD - CS) =
[ns]
th(WR - CS) =
[ns]
td(DB - WR) =
[ns]
th(WR - DB) =
[ns]
td(AD - ALE) =
[ns]
Note 2: Specify a product of -40C to 85C to use it.
155
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
tc(TA) tw(TAH) TAiIN input tw(TAL) tc(UP) tw(UPH) TAiOUT input tw(UPL) TAiOUT input (Up/down input) During event counter mode TAiIN input
(When count on falling edge is selected)
th(TIN-UP)
tsu(UP-TIN)
TAiIN input
(When count on rising edge is selected)
tc(TB) tw(TBH) TBiIN input tw(TBL) tc(AD) tw(ADL) ADTRG input tc(CK) tw(CKH) CLKi tw(CKL) TxDi td(C-Q) RxDi tw(INL) INTi input tw(INH) tsu(D-C) th(C-D) th(C-Q)
Figure 1.23.2. VCC = 5V timing diagram (1)
156
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 5V
Memory Expansion Mode and Microprocessor Mode
(Valid only with wait)
BCLK RD (Separate bus) WR, WRL, WRH (Separate bus) RD (Multiplexed bus) WR, WRL, WRH (Multiplexed bus) RDY input
tsu(RDY-BCLK) th(BCLK-RDY)
(Valid with or without wait)
BCLK
tsu(HOLD-BCLK) th(BCLK-HOLD)
HOLD input
HLDA output
td(BCLK-HLDA) td(BCLK-HLDA)
Hi-Z
P0, P1, P2, P3, P4, P50 to P52
Note: The above pins are set to high-impedance regardless of the input level of the BYTE pin and bit (PM06) of processor mode register 0 selects the function of ports P40 to P43.
Measuring conditions : * VCC=5V * Input timing voltage : Determined with VIL=1.0V, VIH=4.0V * Output timing voltage : Determined with VOL=2.5V, VOH=2.5V
Figure 1.23.3. VCC = 5V timing diagram (2)
157
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Memory Expansion Mode and Microprocessor Mode
(With no wait) Read timing
VCC = 5V
BCLK td(BCLK-CS)
25ns.max
th(BCLK-CS)
4ns.min
CSi
tcyc
th(RD-CS)
0ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE RD
td(BCLK-ALE) th(BCLK-ALE)
25ns.max 25ns.max -4ns.min
th(RD-AD)
0ns.min
td(BCLK-RD)
th(BCLK-RD)
0ns.min
tac1(RD-DB) DB
Hi-Z
tSU(DB-RD)
40ns.min
th(RD-DB)
0ns.min
Write timing BCLK td(BCLK-CS)
25ns.max
th(BCLK-CS)
4ns.min
CSi
tcyc
th(WR-CS)
0ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE) th(BCLK-ALE)
25ns.max
th(WR-AD) 0ns.min th(BCLK-WR)
0ns.min
-4ns.min
td(BCLK-WR) WR,WRL, WRH DB
25ns.max
td(BCLK-DB)
40ns.max Hi-Z
th(BCLK-DB)
4ns.min
(tcyc/2-40)ns.min
td(DB-WR)
th(WR-DB)
0ns.min
Figure 1.23.4. VCC = 5V timing diagram (3)
158
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Memory Expansion Mode and Microprocessor Mode
(When accessing external memory area with wait) Read timing BCLK td(BCLK-CS)
25ns.max
VCC = 5V
th(BCLK-CS)
4ns.min
CSi
tcyc
th(RD-CS)
0ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE) 25ns.max
th(RD-AD)
0ns.min
th(BCLK-ALE)
-4ns.min
td(BCLK-RD) RD DB
25ns.max
th(BCLK-RD)
0ns.min
tac2(RD-DB)
Hi-Z
tSU(DB-RD)
40ns.min
th(RD-DB)
0ns.min
Write timing BCLK td(BCLK-CS)
25ns.max
th(BCLK-CS)
4ns.min
CSi
tcyc
th(WR-CS)
0ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE)
25ns.max
th(WR-AD)
0ns.min
th(BCLK-ALE)
-4ns.min
td(BCLK-WR) WR,WRL, WRH DBi td(DB-WR)
(tcyc-40)ns.min 25ns.max
th(BCLK-WR)
0ns.min
td(BCLK-DB)
40ns.max
th(BCLK-DB)
4ns.min
th(WR-DB)
0ns.min
Measuring conditions : * VCC=5V * Input timing voltage : Determined with: VIL=0.8V, VIH=2.5V * Output timing voltage : Determined with: VOL=0.8V, VOH=2.0V
Figure 1.23.5. VCC = 5V timing diagram (4)
159
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Memory Expansion Mode and Microprocessor Mode
Read timing BCLK td(BCLK-CS)
25ns.max tcyc
VCC = 5V
(When accessing external memory area with wait, and select multiplexed bus)
th(RD-CS)
(tcyc/2)ns.min
th(BCLK-CS)
4ns.min
CSi ADi /DBi
td(AD-ALE)
(tcyc/2-25)ns.min Address
th(ALE-AD)
30ns.min Data input tac3(RD-DB) Address
tdz(RD-AD)
8ns.max
th(RD-DB) tSU(DB-RD) 0ns.min
40ns.min
td(AD-RD)
0ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE RD
td(BCLK-ALE)
25ns.max
th(BCLK-ALE)
-4ns.min
th(RD-AD)
(tcyc/2)ns.min
td(BCLK-RD)
25ns.max
th(BCLK-RD)
0ns.min
Write timing BCLK td(BCLK-CS)
25ns.max tcyc
th(BCLK-CS) th(WR-CS)
(tcyc/2)ns.min 4ns.min
CSi td(BCLK-DB)
40ns.max
th(BCLK-DB)
4ns.min Data output Address
ADi /DBi
Address
td(AD-ALE)
(tcyc/2-25)ns.min
td(DB-WR)
(tcyc x 3/2-40)ns.min
th(WR-DB)
(tcyc/2)ns.min
td(BCLK-AD)
25ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE)
25ns.max
th(BCLK-ALE)
-4ns.min
td(AD-WR)
0ns.min
th(WR-AD)
(tcyc/2)ns.min
td(BCLK-WR) WR,WRL, WRH
25ns.max
th(BCLK-WR)
0ns.min
Measuring conditions : * VCC=5V * Input timing voltage : Determined with VIL=0.8V, VIH=2.5V * Output timing voltage : Determined with VOL=0.8V, VOH=2.0V
Figure 1.23.6. VCC = 5V timing diagram (5)
160
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Table 1.23.23. Electrical characteristics (referenced to VCC = 2.7 to 3.3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 1), f(XIN) = 10MHZ with wait unless otherwise specified)
Symbol Parameter Measuring condition Min
2 .5
Standard Typ. Max.
Unit
VOH
HIGH output P00 to P07, P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, IOH = -1mA, VCC=3.0V P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107 HIGH output voltage XOUT
HIGHPOWER LOWPOWER
V
IOH = -0.1mA, VCC=3.0V IOH = -50A, VCC=3.0V With no load applied, VCC=3.0V With no load applied, VCC=3.0V
2 .5 2 .5 3.0 1 .6 V V
VOH
HIGH output voltage XCOUT
HIGHPOWER LOWPOWER
VOL
LOW output P00 to P07 ,P10 to P17, P20 to P27, voltage P30 to P37, P40 to P47, P50 to P57, IOL = 1mA, VCC=3.0V P60 to P67, P70 to P77, P80 to P84, P86, P87, P90 to P97, P100 to P107
HIGHPOWER
0.5
V
VOL
LOW output voltage XOUT LOW output voltage XCOUT Hysteresis
IOL = 0.1mA, VCC=3.0V IOL = 50A, VCC=3.0V With no load applied, VCC=3.0V With no load applied, VCC=3.0V 0 0
0.5 0.5
V V
LOWPOWER HIGHPOWER LOWPOWER
VT+-VT-
HOLD, RDY, TA0IN to TA2IN, TB1IN, TB2IN, INT0 to INT2, NMI, ADTRG, CTS0 to CTS2, SCL, SDA CLK0 to CLK4,TA2OUT, KI0 to KI3, RxD0 to RxD2 RESET
VCC=3.0V
0 .2
0 .8
V
VT+-VT-
Hysteresis
VCC=3.0V
0.2
1.8
V
IIH
HIGH input P00 to P07, P10 to P17, P20 to P27, current P30 to P37, P40 to P47 ,P50 to P57, P60 to P67, P70 to P77, P80 to P87, P90 to P97, P100 to P107, XIN, RESET, CNVss, BYTE LOW input current P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P70 to P77, P80 to P87, P90 to P97, P100 to P107, XIN, RESET, CNVss, BYTE P00 to P07, P10 to P17, P20 to P27, P30 to P37, P40 to P47, P50 to P57, P60 to P67, P72 to P77, P80 to P84, P86, P87, P90 to P97 ,P100 to P107
VI = 3V, VCC=3.0V
4.0
A
I IL
VI = 0V, VCC=3.0V
-4.0
A
R PULLUP
Pull-up resistance
VI = 0V, VCC=3.0V
66.0
120.0
500.0
k M M
V mA A
R fXIN R fXCIN V RAM
Feedback resistance XIN Feedback resistance XCIN RAM retention voltage In single-chip mode, the output pins are open and other pins are VSS When clock is stopped f(XIN) = 10MHz
Square wave, no division
3 .0 10.0 2.0 8.5 40.0 21.25
f(XCIN) = 32kHz
Square wave
f(XCIN) = 32kHz
When a WAITinstruction is executed. Oscillation capacity High (Note 2)
2 .8
Icc
Power supply current
10 (Topr = 25C)
A
f(XCIN) = 32kHz
When a WAIT instruction is executed. Oscillation capacity Low (Note 2)
0 .9
10 (Topr = 25C) 1 .0
A
Topr = 25C when clock is stopped Topr = 85C when clock is stopped Note 1: Specify a product of -40C to 85C to use it. Note 2: With one timer operated using fC32.
A 20.0
161
Mitsubishi microcomputers
Electrical characteristics (Vcc = 3V)
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.24. External clock input
Symbol
tc tw(H) tw(L) tr tf
Parameter
External clock input cycle time External clock input HIGH pulse width External clock input LOW pulse width External clock rise time External clock fall time
Standard Min. Max.
100 40 40 18 18
Unit
ns ns ns ns ns
Table 1.23.25. Memory expansion and microprocessor modes
Symbol
tac1(RD-DB) tac2(RD-DB) tac3(RD-DB) tsu(DB-RD) tsu(RDY-BCLK ) tsu(HOLD-BCLK ) th(RD-DB) th(BCLK -RDY) th(BCLK-HOLD ) td(BCLK-HLDA)
Parameter
Data input access time (no wait) Data input access time (with wait) Data input access time (when accessing multiplex bus area) Data input setup time RDY input setup time HOLD input setup time Data input hold time RDY input hold time HOLD input hold time HLDA output delay time 10 9 - 90 f(BCLK) X 2 3 X 10 - 90 f(BCLK) X 2 3 X 10 9 - 90 f(BCLK) X 2
9
Standard Min. Max.
(Note) (Note) (Note) 80 60 80 0 0 0 100
Unit
ns ns ns ns ns ns ns ns ns ns
Note: Calculated according to the BCLK frequency as follows:
tac1(RD - DB) = tac2(RD - DB) = tac3(RD - DB) =
[ns]
[ns]
[ns]
162
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.26. Timer A input (counter input in event counter mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Min. Max. 150 60 60 Unit ns ns ns
Table 1.23.27. Timer A input (gating input in timer mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Min. 600 300 300 Max. Unit ns ns ns
Table 1.23.28. Timer A input (external trigger input in one-shot timer mode)
Symbol tc(TA) tw(TAH) tw(TAL) TAiIN input cycle time TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Min. Max. 300 150 150 Unit ns ns ns
Table 1.23.29. Timer A input (external trigger input in pulse width modulation mode)
Symbol tw(TAH) tw(TAL) TAiIN input HIGH pulse width TAiIN input LOW pulse width Parameter Standard Min. Max. 150 150 Unit ns ns
Table 1.23.30. Timer A input (up/down input in event counter mode)
Symbol tc(UP) tw(UPH) tw(UPL) tsu(UP-TIN) th(TIN-UP) TAiOUT input cycle time TAiOUT input HIGH pulse width TAiOUT input LOW pulse width TAiOUT input setup time TAiOUT input hold time Parameter Standard Min. Max. 3000 1500 1500 600 600 Unit ns ns ns ns ns
163
Mitsubishi microcomputers
Electrical characteristics (Vcc = 3V)
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (*) unless otherwise specified) * : Specify a product of -40C to 85C to use it. Table 1.23.31. Timer B input (counter input in event counter mode)
Symbol tc(TB) tw(TBH) tw(TBL) tc(TB) tw(TBH) tw(TBL) Parameter TBiIN input cycle time (counted on one edge) TBiIN input HIGH pulse width (counted on one edge) TBiIN input LOW pulse width (counted on one edge) TBiIN input cycle time (counted on both edges) TBiIN input HIGH pulse width (counted on both edges) TBiIN input LOW pulse width (counted on both edges) Standard Min. 150 60 60 300 160 160 Max. Unit ns ns ns ns ns ns
Table 1.23.32. Timer B input (pulse period measurement mode)
Symbol tc(TB) tw(TBH) tw(TBL) TBiIN input cycle time TBiIN input HIGH pulse width TBiIN input LOW pulse width Parameter Standard Min. 600 300 300 Max. Unit ns ns ns
Table 1.23.33. Timer B input (pulse width measurement mode)
Symbol tc(TB) tw(TBH) tw(TBL) TBiIN input cycle time TBiIN input HIGH pulse width TBiIN input LOW pulse width Parameter Standard Min. Max. 600 300 300 Unit ns ns ns
Table 1.23.34. A-D trigger input
Symbol tc(AD) tw(ADL) Parameter ADTRG input cycle time (trigger able minimum) ADTRG input LOW pulse width Standard Min. 1500 200 Max. Unit ns ns
Table 1.23.35. Serial I/O
Symbol tc(CK) tw(CKH) tw(CKL) td(C-Q) th(C-Q) tsu(D-C) th(C-D) CLKi input cycle time CLKi input HIGH pulse width CLKi input LOW pulse width TxDi output delay time TxDi hold time RxDi input setup time RxDi input hold time
_______
Parameter
Standard Min. 300 150 150 160 0 50 90 Max.
Unit ns ns ns ns ns ns ns
Table 1.23.36. External interrupt INTi inputs
Symbol tw(INH) tw(INL) INTi input HIGH pulse width INTi input LOW pulse width Parameter Standard Min. 380 380 Max. Unit ns ns
164
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Switching characteristics (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 3), CM15="1" unless otherwise specified) Table 1.23.37. Memory expansion and microprocessor modes (with no wait)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) td(BCLK-ALE) th(BCLK-ALE) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) ALE signal output delay time ALE signal output hold time RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard)(Note2)
Measuring condition
Standard Min. Max. 60 4 0 0 60 4 60 --4
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Figure 1.23.7
60 0 60 0 80 4 (Note1) 0
Note 1: Calculated according to the BCLK frequency as follows:
td(DB - WR) = 10 f(BCLK) X 2
9
- 80
[ns]
Note 2: This is standard value shows the timing when the output is off, and doesn't show hold time of data bus. Hold time of data bus is different by capacitor volume and pull-up (pull-down) resistance value. Hold time of data bus is expressed in t = -CR X ln (1 - VOL / VCC) by a circuit of the right figure. For example, when VOL = 0.2VCC, C = 30pF, R = 1k, hold time of output "L" level is t = - 30pF X 1k X ln (1 - 0.2VCC / VCC) = 6.7ns.
Note 3: Specify a product of -40C to 85C to use it.
R DBi C
P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10
30pF
Figure 1.23.7. Port P0 to P10 measurement circuit
165
Mitsubishi microcomputers
Electrical characteristics (Vcc = 3V)
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Switching characteristics (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 3), CM15="1" unless otherwise specified) Table 1.23.38. Memory expansion and microprocessor modes (when accessing external memory area with wait)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) td(BCLK-ALE) th(BCLK-ALE) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) ALE signal output delay time ALE signal output hold time RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard)(Note2)
Measuring condition
Figure 1.23.7
Standard Min. Max. 60 4 0 0 60 4 60 -4 60 0 60 0 80 4 (Note1) 0
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Note 1: Calculated according to the BCLK frequency as follows:
td(DB - WR) = 10 f(BCLK)
9
- 80
[ns]
Note 2: This is standard value shows the timing when the output is off, and doesn't show hold time of data bus. Hold time of data bus is different by capacitor volume and pull-up (pull-down) resistance value. Hold time of data bus is expressed in t = -CR X ln (1 - VOL / VCC) by a circuit of the right figure. For example, when VOL = 0.2VCC, C = 30pF, R = 1k, hold time of output "L" level is t = - 30pF X 1k X ln (1 - 0.2VCC / VCC) = 6.7ns. Note 3: Specify a product of -40C to 85C to use it.
R DBi C
166
Mitsubishi microcomputers
M16C / 30 Group Electrical characteristics (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Switching characteristics (referenced to VCC = 3V, VSS = 0V at Topr = - 20oC to 85oC / - 40oC to 85oC (Note 2), CM15="1" unless otherwise specified) Table 1.23.39. Memory expansion and microprocessor modes (when accessing external memory area with wait, and select multiplexed bus)
Symbol
td(BCLK-AD) th(BCLK-AD) th(RD-AD) th(WR-AD) td(BCLK-CS) th(BCLK-CS) th(RD-CS) th(WR-CS) td(BCLK-RD) th(BCLK-RD) td(BCLK-WR) th(BCLK-WR) td(BCLK-DB) th(BCLK-DB) td(DB-WR) th(WR-DB) td(BCLK-ALE) th(BCLK-ALE) td(AD-ALE) th(ALE-AD) td(AD-RD) td(AD-WR) tdZ(RD-AD)
Parameter
Address output delay time Address output hold time (BCLK standard) Address output hold time (RD standard) Address output hold time (WR standard) Chip select output delay time Chip select output hold time (BCLK standard) Chip select output hold time (RD standard) Chip select output hold time (WR standard) RD signal output delay time RD signal output hold time WR signal output delay time WR signal output hold time Data output delay time (BCLK standard) Data output hold time (BCLK standard) Data output delay time (WR standard) Data output hold time (WR standard) ALE signal output delay time (BCLK standard) ALE signal output hold time (BCLK standard) ALE signal output delay time (Address standard) ALE signal output hold time(Address standard) Post-address RD signal output delay time Post-address WR signal output delay time Address output floating start time
Measuring condition
Standard Min. Max. 60 4 (Note1) (Note1) 60 4 (Note1) (Note1) 60
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Figure 1.23.7
0 60 0 80 4 (Note1) (Note1) 60 -4 (Note1) 50 0 0 8
ns ns ns ns ns ns ns
Note 1: Calculated according to the BCLK frequency as follows:
th(RD - AD) = 10 f(BCLK) X 2 10 9 f(BCLK) X 2 th(RD - CS) = 10 f(BCLK) X 2 10 9 f(BCLK) X 2 td(DB - WR) = 10 X 3 - 80 f(BCLK) X 2 10 9 f(BCLK) X 2 td(AD - ALE) = 10 9 f(BCLK) X 2 - 45 [ns]
9 9 9
[ns]
th(WR - AD) =
[ns]
[ns]
th(WR - CS) =
[ns]
[ns]
th(WR - DB) =
[ns]
Note 2: Specify a product of -40C to 85C to use it.
167
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
tc(TA) tw(TAH) TAiIN input tw(TAL) tc(UP) tw(UPH) TAiOUT input tw(UPL) TAiOUT input (Up/down input) During event counter mode TAiIN input
(When count on falling edge is selected)
th(TIN-UP)
tsu(UP-TIN)
TAiIN input
(When count on rising edge is selected)
tc(TB) tw(TBH) TBiIN input tw(TBL) tc(AD) tw(ADL) ADTRG input
tc(CK) tw(CKH) CLKi tw(CKL) TxDi td(C-Q) RxDi tw(INL) INTi input tw(INH) tsu(D-C) th(C-D) th(C-Q)
Figure 1.23.8. VCC = 3V timing diagram (1)
168
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Memory Expansion Mode and Microprocessor Mode
(Valid only with wait)
BCLK RD (Separate bus) WR, WRL, WRH (Separate bus) RD (Multiplexed bus) WR, WRL, WRH (Multiplexed bus) RDY input
tsu(RDY-BCLK) th(BCLK-RDY)
(Valid with or without wait)
BCLK tsu(HOLD-BCLK) HOLD input th(BCLK-HOLD)
HLDA output td(BCLK-HLDA) P0, P1, P2, P3, P4, P50 to P52
Hi-Z
td(BCLK-HLDA)
Note: The above pins are set to high-impedance regardless of the input level of the BYTE pin and bit (PM06) of processor mode register 0 selects the function of ports P40 to P43. Measuring conditions : * VCC=3V * Input timing voltage : Determined with VIL=0.6V, VIH=2.4V * Output timing voltage : Determined with VOL=1.5V, VOH=1.5V
Figure 1.23.9. VCC = 3V timing diagram (2)
169
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Memory Expansion Mode and Microprocessor Mode
(With no wait) Read timing BCLK td(BCLK-CS)
60ns.max
VCC = 3V
th(BCLK-CS)
4ns.min
CSi
tcyc
th(RD-CS)
0ns.min
td(BCLK-AD)
60ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE RD
td(BCLK-ALE) th(BCLK-ALE)
-4ns.min 60ns.max
th(RD-AD) 0ns.min th(BCLK-RD)
0ns.min
td(BCLK-RD)
60ns.max
tac1(RD-DB) DB
Hi-Z
th(RD-DB) tSU(DB-RD)
80ns.min 0ns.min
Write timing BCLK td(BCLK-CS)
60ns.max
th(BCLK-CS)
4ns.min
CSi
tcyc
th(WR-CS)
0ns.min
td(BCLK-AD)
60ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE) th(BCLK-ALE)
60ns.max 60ns.max -4ns.min
th(WR-AD)
0ns.min
td(BCLK-WR) WR,WRL, WRH DB td(BCLK-DB)
80ns.max Hi-Z
th(BCLK-WR)
0ns.min
th(BCLK-DB)
4ns.min
th(WR-DB) td(DB-WR)
(tcyc/2-80)ns.min 0ns.min
Figure 1.23.10. VCC = 3V timing diagram (3)
170
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Memory Expansion Mode and Microprocessor Mode
(When accessing external memory area with wait) Read timing BCLK td(BCLK-CS)
60ns.max
VCC = 3V
th(BCLK-CS)
4ns.min
CSi
tcyc
th(RD-CS)
0ns.min
td(BCLK-AD)
60ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE)
60ns.max
th(RD-AD)
0ns.min
th(BCLK-ALE)
-4ns.min
td(BCLK-RD)
60ns.max
th(BCLK-RD)
0ns.min
RD tac2(RD-DB) DB
Hi-Z
th(RD-DB) 0ns.min tSU(DB-RD)
80ns.min
Write timing BCLK td(BCLK-CS)
60ns.max
th(BCLK-CS)
4ns.min
CSi
tcyc
th(WR-CS)
0ns.min
td(BCLK-AD)
60ns.max
th(BCLK-AD)
4ns.min
ADi BHE ALE
td(BCLK-ALE)
60ns.max
th(WR-AD)
0ns.min
th(BCLK-ALE)
-4ns.min
td(BCLK-WR)
60ns.max
th(BCLK-WR)
0ns.min
WR,WRL, WRH DBi
td(BCLK-DB)
80ns.max
th(BCLK-DB)
4ns.min
td(DB-WR)
(tcyc-80)ns.min
th(WR-DB)
0ns.min
Measuring conditions : * VCC=3V * Input timing voltage : Determined with VIL=0.48V, VIH=1.5V * Output timing voltage : Determined with VOL=1.5V, VOH=1.5V
Figure 1.23.11. VCC = 3V timing diagram (4)
171
Mitsubishi microcomputers
M16C / 30 Group Timing (Vcc = 3V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC = 3V
Memory Expansion Mode and Microprocessor Mode
(When accessing external memory area with wait, and select multiplexed bus) Read timing BCLK td(BCLK-CS)
60ns.max tcyc
th(BCLK-CS) th(RD-CS)
(tcyc/2)ns.min 4ns.min
CSi td(AD-ALE) (tcyc/2-45)ns.min ADi /DBi
Address
tdz(RD-AD)
8ns.max Data input tac3(RD-DB) Address
th(ALE-AD)
50ns.min
th(RD-DB) tSU(DB-RD)
80ns.min 0ns.min
td(BCLK-AD) ADi BHE ALE RD
60ns.max
td(AD-RD)
0ns.min
th(BCLK-AD)
4ns.min
td(BCLK-ALE)
60ns.max
th(BCLK-ALE)
-4ns.min
(tcyc/2)ns.min
th(RD-AD)
td(BCLK-RD)
60ns.max
th(BCLK-RD)
0ns.min
Write timing BCLK td(BCLK-CS)
60ns.max tcyc
th(WR-CS)
(tcyc/2)ns.min
th(BCLK-CS)
4ns.min
CSi td(BCLK-DB)
80ns.max
th(BCLK-DB)
4ns.min Address
ADi /DBi
Address
Data output
(tcyc/2-60)ns.min
td(AD-ALE)
td(DB-WR)
(tcyc x 3/2-80)ns.min
th(WR-DB)
(tcyc/2)ns.min
td(BCLK-AD) ADi BHE ALE
60ns.max
th(BCLK-AD)
4ns.min
td(BCLK-ALE) th(BCLK-ALE)
60ns.max -4ns.min
td(AD-WR)
0ns.min
th(WR-AD)
(tcyc/2)ns.min
td(BCLK-WR) WR,WRL, WRH
60ns.max
th(BCLK-WR)
0ns.min
Measuring conditions : * VCC=3V * Input timing voltage : Determined with VIL=0.48V,VIH=1.5V * Output timing voltage : Determined with VOL=1.5V,VOH=1.5V
Figure 1.23.12. VCC = 3V timing diagram (5)
172
Mitsubishi microcomputers
M16C / 30 Group Package Outline
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Package Outline
100P6S-A
MMP
JEDEC Code - HD D Weight(g) 1.58 Lead Material Alloy 42
Plastic 100pin 1420mm body QFP
MD
EIAJ Package Code QFP100-P-1420-0.65
e
1
80
b2
100
81
I2 Recommended Mount Pad Symbol Dimension in Millimeters Min Nom Max 3.05 - - 0.1 0.2 0 2.8 - - 0.25 0.3 0.4 0.13 0.15 0.2 13.8 14.0 14.2 19.8 20.0 20.2 0.65 - - 16.5 16.8 17.1 22.5 22.8 23.1 0.4 0.6 0.8 1.4 - - - - 0.13 0.1 - - 0 10 - - - 0.35 1.3 - - 14.6 - - - - 20.6
HE
E
30
51
31
50
A
L1
A A1 A2 b c D E e HD HE L L1 x y b2 I2 MD ME
A2
F
b
A1
e y
x
M
Detail F
100P6Q-A
MMP
JEDEC Code - Weight(g) 0.63 Lead Material Cu Alloy
c
L
Plastic 100pin 1414mm body LQFP
MD
e
EIAJ Package Code LQFP100-P-1414-0.50
D
100 76
1
75
b2
HD
l2 Recommended Mount Pad Symbol A A1 A2 b c D E e HD HE L L1 Lp
A3
25
51
26
50
A e F
L1
x y b2 I2 MD ME
M
Detail F
Lp
c
b
x
y
L
Dimension in Millimeters Min Nom Max 1.7 - - 0.1 0.2 0 1.4 - - 0.13 0.18 0.28 0.105 0.125 0.175 13.9 14.0 14.1 13.9 14.0 14.1 0.5 - - 15.8 16.0 16.2 15.8 16.0 16.2 0.3 0.5 0.7 1.0 - - 0.45 0.6 0.75 - 0.25 - - - 0.08 0.1 - - 0 10 - 0.225 - - 0.9 - - 14.4 - - - - 14.4
HE
E
A2
A1
A3
ME
ME
173
Mitsubishi microcomputers
M16C / 30 Group SFR difference between M16C/62A and M16C/30
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
SFR difference between M16C/62A and M16C/30
Address
0005
Symbol
PM1
M16C/62A
Processor mode register 1 bit0:Reserved bit bit1:Nothing is assigned bit2:Nothing is assigned PM13:Internal reserved area expansion bit bit4:Reserved bit bit5:Reserved bit bit6:Reserved bit PM17:Wait bit
M16C/30
Processor mode register 1 bit0:Reserved bit bit1:Nothing is assigned bit2:Nothing is assigned bit3:Reserved bit bit4:Reserved bit bit5:Reserved bit bit6:Reserved bit PM17:Wait bit Protect register PRC0:Enables writing to system clock control registers 0 and 1 PRC1:Enables writing to processor mode registers 0 and 1 PRC2:Enables writing to port P9 direction register bit3-bit7:Nothing is assigned Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register
000A
PRCR
Protect register PRC0:Enables writing to system clock control registers 0 and 1 PRC1:Enables writing to processor mode registers 0 and 1 PRC2:Enables writing to port P9 direction register and SI/O control register bit3-bit7:Nothing is assigned DMA1 source pointer DMA1 source pointer DMA1 source pointer DMA1 destination pointer DMA1 destination pointer DMA1 destination pointer DMA1 transfer counter DMA1 transfer counter DMA1 control register INT3 interrupt control register Timer B5 interrupt control register Timer B4 interrupt control register Timer B3 interrupt control register SI/O4,INT5 interrupt control register SI/O3,INT4 interrupt control register DMA1 interrupt control register Timer A3 interrupt control register Timer A4 interrupt control register Timer B0 interrupt control register Timer B3, 4, 5 count start flag Timer A1-1 register Timer A1-1 register Timer A2-1 register Timer A2-1 register Timer A4-1 register Timer A4-1 register Three-phase PWM control register 0 Three-phase PWM control register 1 Three-phase output buffer register 0 Three-phase output buffer register 1 Dead time timer Timer B2 interrupt occurrence frequency set counter
0030 0031 0032 0034 0035 0036 0038 0039 003C 0044 0045 0046 0047 0048 0049 004C 0058 0059 005A 0340 0342 0343 0344 0345 0346 0347 0348 0349 034A 034B 034C 034D
SAR1 SAR1 SAR1 DAR1 DAR1 DAR1 TCR1 TCR1 DM1CON INT3IC TB5IC TB4IC TB3IC S4IC/INT5IC S3IC/INT4IC DM1IC TA3IC TA4IC TB0IC TBSR TA11 TA11 TA21 TA21 TA41 TA41 INVC0 INVC1 IDB0 IDB1 DTT ICTB2
174
Mitsubishi microcomputers
M16C / 30 Group SFR difference between M16C/62A and M16C/30
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
SFR difference between M16C/62A and M16C/30
Address
035F
Symbol
IFSR
M16C/62A
Interrupt cause select register IFSR0:INT0 interrupt polarity switching bit IFSR1:INT1 interrupt polarity switching bit IFSR2:INT2 interrupt polarity switching bit IFSR3:INT3 interrupt polarity switching bit IFSR4:INT4 interrupt polarity switching bit IFSR5:INT5 interrupt polarity switching bit IFSR6:Interrupt request cause select bit IFSR7:Interrupt request cause select bit
M16C/30
Interrupt cause select register IFSR0:INT0 interrupt polarity switching bit IFSR1:INT1 interrupt polarity switching bit IFSR2:INT2 interrupt polarity switching bit bit3:Reserved bit bit4:Reserved bit bit5:Reserved bit bit6:Reserved bit bit7:Reserved bit Reserved register Reserved register Reserved register Reserved register Reserved register Reserved register Count start flag TA0S:Timer A0 count start flag TA1S:Timer A1 count start flag TA2S:Timer A2 count start flag bit3:Reserved bit bit4:Reserved bit bit5:Reserved bit TB1S:Timer B1 count start flag TB2S:Timer B2 count start flag
0360 0362 0363 0364 0366 0367 0380
S3TRR S3C S3BRG S4TRR S4C S4BRG TABSR
SI/O3 transmit/receive register SI/O3 control register SI/O3 bit rate generator SI/O4 transmit/receive register SI/O4 control register SI/O4 bit rate generator Count start flag TA0S:Timer A0 count start flag TA1S:Timer A1 count start flag TA2S:Timer A2 count start flag TA3S:Timer A3 count start flag TA4S:Timer A4 count start flag TB0S:Timer B0 count start flag TB1S:Timer B1 count start flag TB2S:Timer B2 count start flag
0382
ONSF One-shot start flag TA0OS:Timer A0 one-shot start flag TA1OS:Timer A1 one-shot start flag TA2OS:Timer A2 one-shot start flag TA3OS:Timer A3 one-shot start flag TA4OS:Timer A4 one-shot start flag bit5:Nothing is assigned TA0TGL:Timer A0 event/trigger select bit TA0TGH: "00","01","10"and"11" can be chosen. One-shot start flag TA0OS:Timer A0 one-shot start flag TA1OS:Timer A1 one-shot start flag TA2OS:Timer A2 one-shot start flag bit3:Reserved bit bit4:Reserved bit bit5:Nothing is assigned TA0TGL:Timer A0 event/trigger select bit TA0TGH: "00","01"and"11" can be chosen. "10" can't be chosen.
0383
TRGSR Trigger select register TA1TGL:Timer A1 event/trigger select bit TA1TGH: "00","01","10"and"11" can be chosen. TA2TGL:Timer A2 event/trigger select bit TA2TGH: "00","01","10"and"11" can be chosen. TA3TGL:Timer A3 event/trigger select bit TA3TGH: "00","01","10"and"11" can be chosen. TA4TGL:Timer A4 event/trigger select bit TA4TGH: "00","01","10"and"11" can be chosen. Trigger select register TA1TGL:Timer A1 event/trigger select bit TA1TGH: "00","01","10"and"11" can be chosen. TA2TGL:Timer A2 event/trigger select bit TA2TGH: "00","01"and"10" can be chosen. "11" can't be chosen. bit4:Reserved bit bit5:Reserved bit bit6:Reserved bit bit7:Reserved bit
0384
UDF Up-down flag TA0UD:Timer A0 up/down flag TA1UD:Timer A1 up/down flag TA2UD:Timer A2 up/down flag TA3UD:Timer A3 up/down flag TA4UD:Timer A4 up/down flag TA2P:Timer A2 two-phase pulse signal processing select bit TA3P:Timer A3 two-phase pulse signal processing select bit TA4P:Timer A4 two-phase pulse signal processing select bit Up-down flag TA0UD:Timer A0 up/down flag TA1UD:Timer A1 up/down flag TA2UD:Timer A2 up/down flag bit3:Reserved bit bit4:Reserved bit TA2P:Timer A2 two-phase pulse signal processing select bit bit6:Reserved bit bit7:Reserved bit
175
Mitsubishi microcomputers
M16C / 30 Group SFR difference between M16C/62A and M16C/30
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
SFR difference between M16C/62A and M16C/30
Address
039C
Symbol
TB1MR
M16C/62A
Timer B1 mode register Event counter mode TMOD0:Operation mode select bit TMOD1: MR0:Count polarity select bit MR1: MR2:Nothing is assigned MR3:Invalid TCK1:Event clock select "0" and "1" can be chosen.
M16C/30
Timer B1 mode register Event counter mode TMOD0:Operation mode select bit TMOD1: MR0:Count polarity select bit MR1: MR2:Nothing is assigned MR3:Invalid TCK1:Event clock select "0 " can be chosen. "1" can't be chosen. Reserved register Reserved register
03B6 03B7 03B8
FMR1 FMR0 DM0SL
Flash memory control register 1 Flash memory control register 0
DMA0 request cause select register DMA0 request factors Falling edge of INT0 pin Software trigger Timer A0 Timer A1 Timer A2 Timer A3 Timer A4 two edges of INT0 pin Timer B0 Timer B1 Timer B2 Timer B3 Timer B4 Timer B5 UART0 transmit UART0 receive UART2 transmit UART2 receive UART1 transmit A-D conversion
DMA0 request cause select register DMA0 request factors Falling edge of INT0 pin Software trigger Timer A0 Timer A1 Timer A2 two edges of INT0 pin Timer B1 Timer B2
UART0 transmit UART0 receive UART2 transmit UART2 receive UART1 transmit A-D conversion
03BA 03BC 03BD 03BE 03D6
DM1SL CRCD CRCIN CRCIN ADCON0
DMA1 request cause select register CRC data register CRC data register CRC input register A-D control register 0 CH0:Analog input pin select bit CH1: CH2: MD0:A-D operation mode select bit 0 MD1: "00","01","10"and"11" can be chosen TRG:Trigger select bit ADST:A-D conversion start flag CKS0:Frequency select bit 0
Reserved register Reserved register Reserved register Reserved register A-D control register 0 CH0:Analog input pin select bit CH1: CH2: MD0:A-D operation mode select bit 0 MD1: "00 " can be chosen. "01","10"and"11" can't be chosen. TRG:Trigger select bit ADST:A-D conversion start flag CKS0:Frequency select bit 0
03D7
ADCON1 A-D control register 1 SCAN0:A-D sweep pin select bit SCAN1: MD2:A-D operation mode select bit 1 BITS:8/10-bit mode select bit CKS1:Frequency select bit 1 VCUT:Vref connect bit OPA0:External op-amp connection mode bit OPA1: A-D control register 1 bit0:Reserved bit bit1:Reserved bit bit2:Reserved bit BITS:8/10-bit mode select bit CKS1:Frequency select bit 1 VCUT:Vref connect bit OPA0:External op-amp connection mode bit OPA1:
176
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