M3021M8M8-AXXXFP [RENESAS]
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER; 单芯片16位CMOS微机
| 型号： | M3021M8M8-AXXXFP |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| 文件： | 总179页 (文件大小：2637K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Description
The M30218 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 musical instruments, house-
hold appliances and other high-speed processing applications.
The M30218 group includes a wide range of products with different internal memory types and sizes and
various package types.
Features
• Basic machine instructions .............Compatible with the M16C/60 series
• Memory capacity ............................ROM / RAM (See figure memory expansion)
• Shortest instruction execution time.100ns (f(XIN)=10MHz)
• Supply voltage ................................4.0V to 5.5V (f(XIN)=10MHz)
2.7V to 5.5V (f(XIN)=3.5MHz)(Note)
• Interrupts ........................................19 internal and 6 external interrupt sources, 4 software
• Multifunction 16-bit timer ................Timer A X 5, Timer B X 3
• FLD conrtoller .................................total 56 pins
(high-breakdown-voltage P-channel open-drain output : 52pins)
• Serial I/O.........................................2 channels for UART or clock synchronous,
1 channels for clock synchronous
(max.256 bytes automatic transfer function)
• DMAC .............................................2 channels (triggers: 15 sources)
• A-D converter .................................10 bits X 8 channels
• D-A converter .................................8 bits X 2 channels
• CRC calculation circuit ...................1 circuit
• Watchdog timer ..............................1 pin
• Programmable I/O ..........................48 pins
• High-breakdown-voltage output......52 pins
• Clock generating circuit ..................2 built-in clock generation circuit
(built-in feedback resistor, and external ceramic or quartz oscillator)
Note: Only mask ROM version.
Applications
Household appliances, office equipment, Audio etc.
------Table of Contents------
Central Processing Unit (CPU) ..................... 10
Reset............................................................. 14
Clock Generating Circuit ............................... 18
Protection ...................................................... 26
Interrupts ....................................................... 27
Watchdog Timer............................................ 45
DMAC ........................................................... 47
FLD controller ............................................... 53
Timer ............................................................. 70
Serial I/O ....................................................... 87
A-D Converter ............................................. 114
D-A Converter ............................................. 124
CRC Calculation Circuit .............................. 126
Programmable I/O Ports ............................. 128
Flash memory version................................. 152
1
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pin Configuration
Figures AA-1 show the pin configurations (top view).
PIN CONFIGURATION (top view)
P6
P6
P6
P6
P6
7
6
5
4
3
/FLD7
/FLD6
/FLD5
/FLD4
/FLD3
81
82
50
49
P2
P2
P2
P2
P3
P3
P3
P3
P3
P3
4
5
6
7
0
1
2
3
4
5
/FLD36
/FLD37
/FLD38
/FLD39
/FLD40
/FLD41
/FLD42
/FLD43
/FLD44
/FLD45
83
84
85
86
87
48
47
46
45
44
P6
P6
2
/FLD2
/FLD1
/FLD0
1
P6
0
88
89
43
42
41
40
39
38
VEE
90
91
P10
P10
P10
P10
7
6
5
4
/AN7
/AN6
/AN5
/AN4
M30218MC-AXXXFP
P3
P3
P4
6/FLD46
7/FLD47
0/FLD48
92
93
94
95
96
97
98
99
37
36
35
34
33
32
P10
P10
P10
3
2
1
/AN3
/AN2
/AN1
P4
P4
P4
P4
P4
P4
1
2
3
/FLD49
/FLD50
/FLD51
AVSS
0/AN0
4
5
6
/T
/R
/CLK0/FLD54
X
D0/FLD52
P10
XD0/FLD53
V
AVCC
REF
100
31
P47/CTS0/RTS0/FLD55
Package:100P6S-A
FigureAA-1. Pin configuration (top view)
2
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Block Diagram
Figure AA-2 is a block diagram of the M30218 group.
Block diagram of the M30218 group
8
8
8
8
8
8
8
Port P0
Port P1
Port P2
Port P3
Port P4
Port P5
Port P6
I/O ports
Internal peripheral functions
Timer
System clock generator
IN-XOUT
CIN-XCOUT
A-D converter
X
X
(10 bits
X
8 channels
)
Timer TA0 (16 bits)
Timer TA1 (16 bits)
Timer TA2 (16 bits)
Timer TA3 (16 bits)
Timer TA4 (16 bits)
Timer TB0 (16 bits)
Timer TB1 (16 bits)
Timer TB2 (16 bits)
Serial I/O
UART/clock synchronous SI/O
(8 bits 2 channels)
SI/O2 (clock synchronous
(256 bytes automatic transfer)
CRC arithmetic circuit (CCITT)
16
12
5
(Polynomial : X +X +X +1)
X
Fluorescent display function
(56 contorol pins)
(52 high-breakdown-voltage ports)
)
M16C/60 series16-bit CPU core
Memory
Registers
ROM
(Note 1)
Program counter
Watchdog timer
(15 bits)
R0H
R0H
R1H
R0L
R0L
R1L
PC
RAM (Note 2)
(includes FLDC,ASI/O RAM)
Vector table
INTB
R2
DMAC
(2 channels)
R3
Stack pointer
A0
A1
FB
ISP
USP
D-A converter
Multiplier
(8 bits X 2 channels)
SB
FLG
Note 1: ROM size depends on MCU type.
Note 2: RAM size depends on MCU type.
FigureAA-2. Block diagram of M30218 group
3
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Performance Outline
Table AA-1 is a performance outline of M30218 group.
Table AA-1. Performance outline of M30218 group
Item
Performance
91 instructions
Number of basic instructions
Shortest instruction execution time
100ns(f(XIN)=10MHz)
Memory
capacity
I/O port
ROM
See figure memory expansion
RAM
See figure memory expansion
P3, P4, P7 to P10
P0 to P2, P5, P6
8 bits x 6
Output port
8 bit x 5
Multifunction TA0, TA1, TA2, TA3, TA4
16 bits x 5
timer
TB0, TB1, TB2
UART0, UART1
SI/O2
16 bits x 3
Serial I/O
(UART or clock synchronous) x 2
(Clock synchronous) x 1 (with automatic transfer function)
56 pins
Fluorescent display
A-D converter
10 bits x 8 channels
D-A converter
8 bits x 2
DMAC
2 channels (triggers :15 sources)
16
12
5
CRC calculation circuit
Watchdog timer
Interrupt
1 circuit (polynomial: X + X + X + 1)
15 bits x 1 (with prescaler)
19 internal and 6 external sources, 4 software sources, 7 levels
2 built-in clock generation circuits
Clock generating circuit
(built-in feedback resistor, and external ceramic or quartz oscillator)
4.0 to 5.5V (f(XIN)=10MHz)
Supply voltage
2.7 to 5.5V (f(XIN)=3.5MHz) (Note)
Power consumption
18 mW (VCC=3V, f(XIN)=5MHz)
I/O withstand voltage
VCC-48V (output ports : P0 to P2, P5, P6, I/O ports : P3, P40 to P43)
I/O
characteristics
0 to VCC (I/O ports :P44 to P47, P7 to P10)
- 18mA (P0 to P3, P40 to P43, P5, P6)
Output current
H
L
:high-breakdown-voltage, P-channel open-drain
- 5mA (P44 to P47, P7 to P10)
5mA (P44 to P47, P7 to P10)
o
Operating ambient temperature
Device configuration
Package
–20 to 85 C
CMOS silicon gate
100-pin plastic mold QFP
Note: Only mask ROM version.
4
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mitsubishi plans to release the following products in the M30218 group:
(1) Support for mask ROM version and flash memory version
(2) Memory capacity
(3) Package
100P6S
: Plastic molded QFP (mask ROM version and flash memory version)
RAM size
(Byte)
M30218MC-AXXXFP
M30218FCFP
12K
5K
1K
M30217MA-AXXXFP
512
ROM size
(Byte)
96K
128K
Figure AA-3. ROM expansion
Type No.
M 3 0 2 1 8 M C – A X X X F P
Package type:
FP : Package 100P6S-A
ROM No.
Omitted for flash memory version
ROM capacity:
2 : 16K bytes
4 : 32K bytes
6 : 48K bytes
8 : 64K bytes
A : 96K bytes
C : 128K bytes
Memory type:
M : Mask ROM version
F : Flash memory version
Shows RAM capacity, pin count, etc
(The value itself has no specific meaning)
M16C/21 Group
M16C Family
Figure AA-4. Type No., memory size, and package
5
Mitsubishi microcomputers
M30218 Group
Pin Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pin Description
Pin name
CC, VSS
Signal name
I/O type
Function
Supply 2.7V(Note1) to 5.5 V to the VCC pin. Supply 0 V to the VSS pin.
Connect a bypass capacitor across the VCC pin and VSS pin.
Power supply
input
V
CNVSS
RESET
CNVSS
Input
Connect it to the VSS pin.
Reset input
Input
A “L” on this input resets the microcomputer.
X
IN
Clock input
Input
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
X
OUT
Clock output
Output
X
OUT pin open.
AVCC
AVSS
Analog power
supply input
This pin is a power supply input for the A-D converter. Connect this
pin to VCC
.
Analog power
supply input
This pin is a power supply input for the A-D converter. Connect this
pin to VSS
.
Reference
voltage input
V
REF
Input
This pin is a reference voltage input for the A-D converter.
V
EE
pull-down
power source
Apply voltage supplied to pull-down resistors of ports P0 to P1,P5,P6.
Output port P0 Output
P0
P0
0
7
/FLD16 to
/FLD23
This is an 8-bit CMOS output port and high-breakdown-voltage P-
channel open-drain output structure. A pull-down resistor is built in
between port P0 and VEE pin. At reset, this port is set to VEE level. P0
function as FLD controller output pins as selected by software.
P1
0
/FLD24 to
/FLD31
This is an 8-bit output port equivalent to P0. Pins in this port also
function as FLD controller output pins as selected by software.
Output port P1 Output
Output port P2 Output
P17
This is an 8-bit output port equivalent to P0. A pull-down resistor is not
built in between P2 and VEE pin. Pins in this port also function as FLD
controller output pins as selected by software.
P20
/FLD32 to
/FLD39
P27
This is an 8-bit I/O port. A pull-down resistor is not built in between P3
and VEE pin. It has an input/output port direction register that allows the
user to set each pin for input or output. This is low-voltage input level,
and high-breakdown-voltage P-channel open-drain output structure.
Pins in this port also function as FLD controller output pins as selected
by software.
P3
P3
0
7
/FLD40 to
/FLD47
I/O port P3
I/O port P4
Input/output
P4
P4
0
7
/FLD48 to
/FLD56
This is an 8-bit I/O port equivalent to P3. This is low-voltage input level.
Input/output
P4
structure, P4
in between P4(P4
as FLD controller output pins as selected by software. P4
function as UART0 I/O pins as selected by software. When set for
0
to P4
3
is high-breakdown-voltage P-channel open-drain output
to P4 is CMOS output. A pull-down resistor is not built
to P4 ) and VEE pin. Pins in this port also function
to P4 also
4
7
0
3
4
7
input, the user can specify in units of four bits by software whether or
not they are tied to a pull-up resistor.
P5
P5
0
7
/FLD
/FLD15
8
to
to
This is an 8-bit output port equivalent to P0. Pins in this port also
function as FLD controller output pins as selected by software.
Output port P5 Output
Output port P6 Output
P6
P6
0
7
/FLD
/FLD
0
7
This is an 8-bit output port equivalent to P0. Pins in this port also
function as FLD controller output pins as selected by software.
6
Mitsubishi microcomputers
M30218 Group
Pin Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pin Description
Pin name
Signal name
I/O type
Function
This is an 8-bit I/O port equivalent to P3. This is CMOS input/output.
When set for input, the user can specify in units of four bits by software
P7
0
to P7
7
I/O port P7
Input/output
whether or not they are tied to a pull-up resistor. P7
TimerB0 to B2 input pins as selected by software. P7
TimerA0 I/O pin as selected by software. P7 to P7 function as
0
to P7
2 function as
3
function as
4
7
TimerA1 to A4 I/O pins, and UART1 I/O pins as selected by software.
P8
0
to P8
7
I/O port P8
Input/output
Input/output
This is an 8-bit I/O port equivalent to P7. When set for input, the user
can specify in units of four bits by software whether or not they are tied
to a pull-up resistor. P8
as selected by software. P8
selected by software. In this case, connect a quarts oscillator between
P8 (XOUT pin) and P8 (XCIN pin)
0
to P8
5
function as external interrupt input pins
6
,P8
7
function as sub-clock input pin as
6
7
P90
to P9
7
I/O port P9
This is an 8-bit I/O port equivalent to P7. When set for input, the user
can specify in units of four bits by software whether or not they are tied
to a pull-up resistor. P9
output pins (same frequency of XIN/8, XIN/32 or XCIN) and DIM signal
output pin of FLD controller as selected by software. P9 function as D-
A converter output pins and clock I/O pin of serial I/O with automatic
transfer as selected by software. P9 to P9 function as I/O pin of serial
7 function as D-A converter output pins, clock
6
0
5
I/O with automatic transfer as selected by software.
This is an 8-bit I/O port equivalent to P7. When set for input, the user
can specify in units of four bits by software whether or not they are tied
to a pull-up resistor. Pins in this port also function as A-D converter
input pins as selected by software.
P10
0
to P10
7
I/O port P10
Input/output
Note 1: Supply 4.0V to 5.5V to the VCC pin in flash memory version.
7
Mitsubishi microcomputers
M30218 Group
Memory
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Operation of Functional Blocks
The M30218 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, FLD controller, serial I/O, D-A converter, DMAC, CRC
calculation circuit, A-D converter, and I/O ports.
The following explains each unit.
Memory
Figure BA-1 is a memory map of the M30218 group. The address space extends the 1M bytes from ad-
dress 0000016 to FFFFF16. From FFFFF16 down is ROM. For example, in the M30218MC-AXXXFP, there
is 128K bytes of internal ROM from E000016 to FFFFF16. The vector table for fixed interrupts such as the
reset 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 M30218MC-AXXXFP, there is 12K bytes of internal RAM
from 0040016 to 033FF16. In addition to storing data, the RAM also stores the stack used when calling
subroutines and when interrupts are generated. (From 0040016 to 004FF16 is RAM for SIO2. From 0050016
to 005DF16 is RAM for FLD.)
The SFR area is mapped to 0000016 to 003FF16. This area accommodates the control registers for periph-
eral devices such as I/O ports, A-D converter, serial I/O, and timers, etc. 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.
0000016
SFR area
(For details, see
Figures BA-2 and BA-3)
FFE0016
0040016
RAM area for SI/O2
0050016
RAM area for FLD
Special page
(224 bytes)
vector table
005E016
Internal RAM area
FFFDC16
YYYYY16
Undefined instruction
Overflow
BRK instruction
Address match
Single step
Address
XXXXX16 YYYYY16
Address
Type No.
M30218MC
M30218FC
Watchdog timer
E000016
E800016
033FF16
017FF16
XXXXX16
FFFFF16
DBC
Internal ROM area
M30217MA
Reset
FFFFF16
Figure BA-1. Memory map
8
Mitsubishi microcomputers
M30218 Group
Memory
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
004016
004116
004216
004316
004416
004516
004616
004716
004816
004916
004A16
004B16
004C16
004D16
004E16
004F16
005016
005116
005216
005316
005416
005516
005616
005716
005816
005916
005A16
005B16
005C16
005D16
005E16
005F16
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
Processor mode register 0 (PM0)
Processor mode register 1(PM1)
System clock control register 0 (CM0)
System clock control register 1 (CM1)
INT3 interrupt control register (INT3IC)
INT4 interrupt control register (INT4IC)
INT5 interrupt control register (INT5IC)
Address match interrupt enable register (AIER)
Protect register (PRCR)
DMA0 interrupt control register (DM0IC)
DMA1 interrupt control register (DM1IC)
A-D conversion interrupt control register (ADIC)
SI/O automatic transfer interrupt control register (ASIOIC)
Watchdog timer start register (WDTS)
Watchdog timer control register (WDC)
FLD interrupt control register (FLDIC)
UART0 transmit interrupt control register (S0TIC)
UART0 receive interrupt control register (S0RIC)
UART1 transmit interrupt control register (S1TIC)
UART1 receive interrupt control register (S1RIC)
Timer A0 interrupt control register (TA0IC)
Timer A1 interrupt control register (TA1IC)
Timer A2 interrupt control register (TA2IC)
Timer A3 interrupt control register (TA3IC)
Address match interrupt register 0 (RMAD0)
Address match interrupt register 1 (RMAD1)
Timer A4 interrupt control register (TA4IC)
Timer B0 interrupt control register (TB0IC)
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)
002016
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
Serial I/O2 automatic transfer data pointer (SIO2DP)
Serial I/O2 control register 1 (SIO2CON1)
Serial I/O2 control register 2 (SIO2CON2)
Serial I/O2 register / transfer counter (SIO2)
Serial I/O2 control register 3 (SIO2CON3)
002116 DMA0 source pointer (SAR0)
002216
002316
002416
DMA0 destination pointer (DAR0)
002516
002616
002716
002816
DMA0 transfer counter (TCR0)
002916
002A16
002B16
002C16
DMA0 control register (DM0CON)
002D16
002E16
002F16
003016
FLD mode register (FLDM)
FLD output control register (FLDCON)
DMA1 source pointer (SAR1)
003116
003216
003316
003416
Tdisp time set register (TDISP)
Toff1 time set register (TOFF1)
Toff2 time set register (TOFF2)
DMA1 destination pointer (DAR1)
003516
003616
003716
003816
FLD data pointer (FLDDP)
DMA1 transfer counter (TCR1)
003916
P2 FLD/port switch register (P2FPR)
P3 FLD/port switch register (P3FPR)
P4 FLD/port switch register (P4FPR)
P5 digit output set register (P5DOR)
P6 digit output set register (P6DOR)
003A16
003B16
003C16
DMA1 control register (DM1CON)
003D16
003E16
003F16
Figure BA-2. Location of peripheral unit control registers (1)
9
Mitsubishi microcomputers
M30218 Group
Memory
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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
039F16
03A016
03A116
03A216
03A316
03A416
03A516
03A616
03A716
03A816
03A916
03AA16
03AB16
03AC16
03AD16
03AE16
03AF16
03B016
03B116
03B216
03B316
03B416
03B516
03B616
03B716
03B816
03B916
03BA16
03BB16
03BC16
03BD16
03BE16
03BF16
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
Count start flag (TABSR)
A-D register 0 (AD0)
Clock prescaler reset flag (CPSRF)
One-shot start flag (ONSF)
Trigger select register (TRGSR)
Up-down flag (UDF)
A-D register 1 (AD1)
A-D register 2 (AD2)
A-D register 3 (AD3)
Timer A0 (TA0)
Timer A1 (TA1)
A-D register 4 (AD4)
A-D register 5 (AD5)
Timer A2 (TA2)
Timer A3 (TA3)
A-D register 6 (AD6)
A-D register 7 (AD7)
Timer A4 (TA4)
Timer B0 (TB0)
Timer B1 (TB1)
A-D control register 2 (ADCON2)
Timer B2 (TB2)
A-D control register 0 (ADCON0)
A-D control register 1 (ADCON1)
D-A register 0 (DA0)
Timer A0 mode register (TA0MR)
Timer A1 mode register (TA1MR)
Timer A2 mode register (TA2MR)
Timer A3 mode register (TA3MR)
Timer A4 mode register (TA4MR)
Timer B0 mode register (TB0MR)
Timer B1 mode register (TB1MR)
Timer B2 mode register (TB2MR)
D-A register 1 (DA1)
D-A control register (DACON)
Port P0 (P0)
Port P1 (P1)
UART0 transmit/receive mode register (U0MR)
UART0 bit rate generator (U0BRG)
UART0 transmit buffer register (U0TB)
Port P2 (P2)
Port P3 (P3)
UART0 transmit/receive control register 0 (U0C0)
UART0 transmit/receive control register 1 (U0C1)
UART0 receive buffer register (U0RB)
Port P3 direction register (PD3)
Port P4 (P4)
Port P5 (P5)
UART1 transmit/receive mode register (U1MR)
UART1 bit rate generator (U1BRG)
Port P4 direction register (PD4)
UART1 transmit buffer register (U1TB)
Port P6 (P6)
Port P7 (P7)
UART1 transmit/receive control register 0 (U1C0)
UART1 transmit/receive control register 1 (U1C1)
UART1 receive buffer register (U1RB)
Port P7 direction register (PD7)
Port P8 (P8)
Port P9 (P9)
Port P8 direction register (PD8)
Port P9 direction register (PD9)
Port P10 (P10)
UART transmit/receive control register 2 (UCON)
Flash memory control register 0 (FCON0) (Note)
Flash memory control register 1 (FCON1) (Note)
Flash command register (FCMD) (Note)
Port P10 direction register (PD10)
DMA0 request cause select register (DM0SL)
DMA1 request cause select register (DM1SL)
CRC data register (CRCD)
CRC input register (CRCIN)
Pull-up control register 0 (PUR0)
Pull-up control register 1 (PUR1)
Note: This register is only exist in flash memory version.
Figure BA-3. Location of peripheral unit control registers (2)
10
Mitsubishi microcomputers
M30218 Group
CPU
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Central Processing Unit (CPU)
The CPU has a total of 13 registers shown in Figure CA-1. Seven of these registers (R0, R1, R2, R3, A0,
A1, and FB) come in two sets; therefore, these have two register banks.
b15
b15
b15
b15
b8 b7
b8 b7
b0
b0
b0
b0
R0(Note)
L
L
H
H
b19
b19
b0
R1(Note)
R2(Note)
R3(Note)
PC
Program counter
Data
registers
b0
b0
Interrupt table
register
INTB
H
L
b15
b15
b15
b15
User stack pointer
USP
ISP
SB
b0
b0
b0
b15
b15
b15
b0
b0
b0
A0(Note)
A1(Note)
FB(Note)
Interrupt stack
pointer
Address
registers
Static base
register
Frame base
registers
FLG
Flag register
IPL
U
I O B S Z D C
Note: These registers consist of two register banks.
Figure CA-1. Central processing unit register
(1) Data registers (R0, R0H, R0L, R1, R1H, R1L, 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.
Registers R0 and R1 each can be used as separate 8-bit data registers, high-order bits as (R0H, R1H),
and low-order bits as (R0L, R1L). In some instructions, registers R2 and R0, as well as R3 and R1 can
use as 32-bit data registers (R2R0, 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).
11
Mitsubishi microcomputers
M30218 Group
CPU
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) Frame base register (FB)
Frame base register (FB) is configured with 16 bits, and is used for FB relative addressing.
(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/ISP)
Stack pointer comes in two types: user stack pointer (USP) and interrupt stack pointer (ISP), each config-
ured 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 CA-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.
12
Mitsubishi microcomputers
M30218 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
Flag register (FLG)
U I O B S Z D C
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 CA-2. Flag register (FLG)
13
Mitsubishi microcomputers
M30218 Group
Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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.
Figure DA-1 shows the example reset circuit. Figure DA-2 shows the reset sequence.
5V
4.0V
V
CC
0V
5V
VCC
RESET
RESET
0V
0.8V
Example when f(XIN) = 10MHz and VCC = 5V
.
Figure DA-1. Example reset circuit
XIN
More than 20 cycles are needed
BCLK 24cycles
RESET
BCLK
(Internal clock)
Content of reset vector
FFFFC16
FFFFE16
Address
(Internal address
signal)
Figure DA-2. Reset sequence
14
Mitsubishi microcomputers
M30218 Group
Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(24)
(25)
(26)
Timer A0 interrupt control register
Timer A1 interrupt control register
(005516)···
(005616)···
? 0
0
0
(1) Processor mode register 0
(000416)···
(000516)···
0
0
0
0
0
0
0
0
0
0
(2) Processor mode register 1
?
?
?
?
0
0
0
0
0
0
0
0
0
0
0
0
0
Timer A2 interrupt control register
Timer A3 interrupt control register
Timer A4 interrupt control register
(005716)···
(005816)···
(005916)···
(3) System clock control register 0
(4) System clock control register 1
(000616)··· 0 1 0
(000716)··· 0 0 1
0
0
1
0
0
0
(27)
(5)
(28)
(29)
Address match interrupt enable register (000916)···
0
0
?
0
0
?
Timer B0 interrupt control register
Timer B1 interrupt control register
(005A16)···
(005B16)···
?
?
0
0
0
0
0
0
(6) Protect register
(000A16)···
0
?
(30)
(31)
(7)
(8)
Watchdog timer control register
Address match interrupt register 0
(000F16)··· 0 0 0
(001016)···
?
?
Timer B2 interrupt control register
INT0 interrupt control register
INT1 interrupt control register
(005C16)···
(005D16)···
(005E16)···
?
?
?
?
0
0
0
0
0
0
0
0
0
0
0
0
0016
0016
(32)
(001116)···
0
0
0
0
0
0
(33)
(34)
(35)
(001216)···
(001416)···
(001516)···
0 0
0016
0
0
(9)
Address match interrupt register 1
INT2 interrupt control register
Serial I/O 2 control register 1
(005F16)···
(034216)···
0016
0016
0016
0
(36)
(37)
(38)
Serial I/O 2 control register 2
Serial I/O 2 control register 3
(034416)···
(034816)···
(001616)···
0
?
?
0
0
0
0
0
0
0016
0016
0016
(10)
(11)
(12)
DMA0 control register
DMA1 control register
(002C16)··· 0 0 0
(003C16)··· 0 0 0
0
0
0
0
FLDC mode register
(035016)···
(39)
FLD output control register
(035116)···
(035216)···
INT3 interrupt control register
(004416)···
(004816)···
0 0
0 0
?
?
0
0
0
0
0
0
0016
(40)Tdisp time set register
(41)Toff1 time set register
(13)INT4 interrupt control register
(14)
(035416)···
(035616)···
(035916)···
(035A16)···
(035B16)···
FF16
FF16
0
0
? 0
0
0
0
0
INT5 interrupt control register
(004916)···
(004B16)···
(42)
Toff2 time set register
(15)DMA0 interrupt control register
(16)DMA1 interrupt control register
?
?
0
0
0016
0016
0016
(43)P2 FLD/port switch register
(44) P3 FLD/port switch register
(004C16)···
(004E16)···
0
0
0
0
A-D conversion interrupt control register
(17)
? 0
? 0
? 0
P4 FLD/port switch register
P5 digit output set register
P6 digit output set register
(45)
(46)
(47)
(18)SI/O automatic transfer interrupt
control register
FLD interrupt control register
(19)
(004F16)···
(005016)···
0
0
0
0
0
0
0
0
0016
0016
(035C16)···
(035D16)···
(20)
UART0 transmit interrupt control register
UART0 receive interrupt control register
?
?
0
0
(005116)···
(005216)···
(005316)···
(21)
UART1 transmit interrupt control register
UART1 receive interrupt control register
(22)
? 0
? 0
0
0
0
0
(23)
(005416)···
The content of other registers and RAM is undefined when the microcomputer is reset.
The initial values must therefore be set.
x : Nothing is mapped to this bit
? : Undefined
Figure DA-3. Device's internal status after a reset is cleared
15
Mitsubishi microcomputers
M30218 Group
Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(48)
(49)
Count start flag
(038016)···
(038116)···
0016
(77)
(78)
Port P3 direction register
Port P4 direction register
Port P7 direction register
(03E716)···
(03EA16)···
(03EF16)···
(03F216)···
0016
0016
0016
0016
0016
0016
0016
0
Clock prescaler reset flag
(50)One-shot start flag
(038216)··· 0
0
0
0
0
0 0
(79)
(80) Port P8 direction register
(81) Port P9 direction register
(82) Port P10 direction register
(51)Trigger select flag
(52)Up-down flag
(038316)···
(038416)···
0016
0016
(03F316)···
(03F616)···
(03FD16)···
(53)Timer A0 mode register
(54)Timer A1 mode register
(55)Timer A2 mode register
(039616)···
(039716)···
(039816)···
0016
0016
0016
(83)
(84)
(85)
Pull-up control register 0
Pull-up control register 1
Data registers (R0/R1/R2/R3)
(03FE16)···
0016
(56)Timer A3 mode register
(57)Timer A4 mode register
(58)Timer B0 mode register
(039916)···
(039A16)···
(039B16)··· 0
0016
0016
0
000016
(86)
(87)
(88)
Address registers (A0/A1)
Frame base register (FB)
Interrupt table register (INTB)
000016
000016
0000016
0
0
?
?
0
0
0
0
0
0
0
(59)
(60)
(61)
(62)
0
(039C16)···
0
Timer B1 mode register
(89)
(90)
(91)
(92)
Timer B2 mode register
(039D16)··· 0 0 ?
(03A016)···
0
0 0
User stack pointer (USP)
Interrupt stack pointer (ISP)
Static base register (SB)
000016
000016
000016
UART0 transmit/receive mode register
0016
UART0 transmit/receive control register 0 (03A416)··· 0 0 0
UART0 transmit/receive control register 1 (03A516)··· 0 0 0
0
0
1
0
0
0
0 0
1 0
(63)
(64)
(65)
Flag register (FLG)
000016
UART1 transmit/receive mode register
(03A816)···
0016
UART1 transmit/receive control register 0 (03AC16)··· 0 0 0
UART1 transmit/receive control register 1 (03AD16)··· 0 0 0
0
0
0
1
0
0
0
0 0
1 0
0 0
(66)
UART transmit/receive control register 2
(03B016)···
(03B416)··· 0
(03B516)···
0 0
0
0
0
0
(67)
(68)
(69)
Flash memory control register 0
(Note )
Flash memory control register 1
(Note)
0
1 0
0
0
0
0
0016
(03B616)···
(70)
(71)
Flash command register (Note)
DMA0 cause select register
(03B816)···
(03BA16)···
0016
0016
DMA1 cause select register
(72)
(73)A-D control register 2
(03D416)···
0
(74)
A-D control register 0
A-D control register 1
D-A control register
(03D616)···
(03D716)···
(03DC16)···
0
0 0
0
0
?
? ?
(75)
(76)
0016
0016
The content of other registers and RAM is undefined when the microcomputer is reset.
The initial values must therefore be set.
x : Nothing is mapped to this bit
? : Undefined
Note: This register is only exist in flash memory version.
Figure DA-4. Device's internal status after a reset is cleared
16
Mitsubishi microcomputers
M30218 Group
Software Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Reset
Writing “1” to bit 3 of the processor mode register 0 (address 000416) applies a (software reset) reset to the
microcomputer. A software reset has almost the same effect as a hardware reset. The contents of internal
RAM are preserved.
Figure DA-5 shows the processor mode register 0 and 1.
Processor mode register 0 (Note)
Symbol
PM0
Address
000416
When reset
XXXX0000
b7 b6 b5 b4 b3 b2 b1 b0
2
0
0
0
0
R W
Bit symbol
Reserved bit
Bit name
Function
Must always be set to “0”
The device is reset when this bit
is set to “1”. The value of this bit
is “0” when read.
PM03
Software reset bit
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
Note: Set bit 1 of the protect register (address 000A16) to “1” when writing new
values to this register.
Processor mode register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PM1
Address
000516
When reset
00XXXXX0
0
0
0
2
R W
Bit symbol
Reserved bit
Bit name
Function
Must always be set to “0”
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
Must always be set to “0”
Reserved bit
Note: Set bit 1 of the protect register (address 000A16) to “1” when writing new values
to this register.
Figure DA-5. Processor mode register 0 and 1.
17
Mitsubishi microcomputers
M30218 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 WA-1. Main clock and sub clock generating circuits
Main clock generating circuit
• CPU’s operating clock source
• Internal peripheral units’
operating clock source
Ceramic or crystal oscillator
XIN, XOUT
Sub clock generating circuit
• CPU’s operating clock source
• Timer A/B’s count clock
source
Use of clock
Usable oscillator
Crystal oscillator
XCIN, XCOUT
Pins to connect oscillator
Oscillation stop/restart function
Available
Available
Oscillator status immediately after reset Oscillating
Stopped
Other
Externally derived clock can be input
Example of oscillator circuit
Figure WA-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 WA-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 WA-1 and WA-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)
X
IN
XOUT
X
IN
XOUT
Open
(Note)
Rd
Externally derived clock
Vcc
Vss
CIN
C
OUT
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 WA-1. Examples of main clock
Microcomputer
(Built-in feedback resistor)
Microcomputer
(Built-in feedback resistor)
X
CIN
XCOUT
X
CIN
XCOUT
Open
(Note)
R
Cd
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 WA-2. Examples of sub clock
18
Mitsubishi microcomputers
M30218 Group
Clock Generating Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Control
Figure WA-3 shows the block diagram of the clock generating circuit.
X
COUT
X
CIN
fC32
1/32
f
1
CM04
f1SIO2
f
AD
fC
f8SIO2
Sub clock
f
8
CM10 “1”
Write signal
f
32
S
R
Q
XIN
X
OUT
b
c
CM07=0
a
d
Divider
RESET
Software reset
f
C
BCLK
Main clock
CM02
CM07=1
CM05
Interrupt request
level judgment output
S Q
R
WAIT instruction
c
b
1/2
1/2
1/2
1/2
1/2
a
CM06=0
CM17,CM16=11
CM06=1
CM06=0
CM17,CM16=10
d
CM06=0
CM17,CM16=01
CM0i : Bit i at address 000616
CM1i : Bit i at address 000716
WDCi : Bit i at address 000F16
CM06=0
CM17,CM16=00
Details of divider
Figure WA-3. Clock generating circuit
19
Mitsubishi microcomputers
M30218 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 re-
tained.
(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.
(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 expan-
sion and the microprocessor modes.
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 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, fAD, f1SIO2, f8SIO2)
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.
20
Mitsubishi microcomputers
M30218 Group
Clock Generating Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Figure WA-4 shows the system clock control registers 0 and 1.
System clock control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CM0
Address
000616
When reset
4816
Bit symbol
CM00
Bit name
Function
R W
b1 b0
Clock output function
select bit
(Valid only in single-chip
mode)
0 0 : I/O port P97/DA0
0 1 : f
1 0 : f
1 1 : f32 output
C
output
output
8
CM01
CM02
CM03
WAIT peripheral function
clock stop bit
0 : Do not stop peripheral function clock in wait mode
1 : Stop peripheral function clock in wait mode (Note 8)
X
CIN-XCOUT drive capacity 0 : LOW
select bit (Note 2)
1 : HIGH
Port X
C
select bit
0 : I/O port
1 : XCIN-XCOUT generation
CM04
CM05
Main clock (XIN-XOUT
stop bit (Note 3, 4, 5)
)
0 : On
1 : Off
Main clock division select 0 : CM16 and CM17 valid
CM06
CM07
bit 0 (Note 7)
1 : Division by 8 mode
System clock select bit
(Note 6)
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 power saving mode, main clock stops using this bit. When returning from stop mode and
operating with XIN, set this bit to “0”. When main clock oscillation is operating by itself, 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 to 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.
System clock control register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CM1
Address
000716
When reset
2016
0
0
0
0
Bit symbol
CM10
Bit name
Function
R W
All clock stop control bit
(Note4)
0 : Clock on
1 : All clocks off (stop mode)
Reserved bit
Always set to “0”
Reserved bit
Reserved bit
Reserved bit
Always set to “0”
Always set to “0”
Always set to “0”
X
IN-XOUT drive capacity
0 : LOW
1 : HIGH
CM15
select bit (Note 2)
b7 b6
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
CM16
CM17
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 high-
impedance state.
Figure WA-4. Clock control registers 0 and 1
21
Mitsubishi microcomputers
M30218 Group
Clock output
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Output
The clock output function select bit (bit 0,1 at address 000616) allows you to choose the clock from f8, f32, or
fc to be output from the P97/DA0/CLKOUT/DIMOUT pin. When the WAIT peripheral function clock stop bit
(bit 2 at address 000616) is set to “1”, the output of f8 and f32 stop by executing of WAIT instruction.
Stop Mode
Writing “1” to the all-clock stop control bit (bit 0 at address 000716) stops all oscillation and the microcom-
puter enters stop mode. In stop mode, the content of the internal RAM is retained provided that VCC re-
mains above 2V.
Because the oscillation of BCLK, f1 to f32, fc, fC32, and fAD stops in stop mode, peripheral functions such as
the fluorescent display function, serial I/O 2, 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 UART0
and UART2 functions provided an external clock is selected. Table WA-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. If returning by an interrupt, that interrupt routine is executed.
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 WA-2. Port status during stop mode
Pin
States
Retains status before stop mode
“H”
Port
CLKOUT
When fC selected
When f8, f32 selected
Retains status before stop mode
Wait Mode
When a WAIT instruction is executed, BCLK stops and the microcomputer enters the wait mode. In this mode,
oscillation continues but 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. Table WA-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, the
microcomputer restarts from the interrupt routine using as BCLK, the clock that had been selected when the
WAIT instruction was executed.
Table WA-3. Port status during wait mode
Pin
States
Port
Retains status before wait mode
Does not stop
CLKOUT
When fC selected
When f8, f32 selected
Does not stop when the WAIT
peripheral function clock stop bit is
“0”. (Note)
When the WAIT peripheral function clock
stop bit is “1”, the status immediately prior
to entering wait mode is maintained.
Note: Attention that reducing the power dissipation is impossible.
22
Mitsubishi microcomputers
M30218 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 WA-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 sub-
clock 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 WA-4. Operating modes dictated by settings of system clock control registers 0 and 1
CM17
CM16
CM07
CM06
CM05
CM04
Invalid
Invalid
Invalid
Invalid
Invalid
1
Operating mode of BCLK
Division by 2 mode
Division by 4 mode
Division by 8 mode
Division by 16 mode
No-division mode
0
1
1
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
1
0
Invalid
1
Invalid
1
1
0
0
0
0
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Low-speed mode
1
Low power dissipation mode
23
Mitsubishi microcomputers
M30218 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 internal
clock selected. 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 according to the internal clock selected. Each peripheral function oper-
ates 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
secondary clock. Each peripheral function operates according to its assigned clock.
• Low power consumption 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 secondary clock. The only peripheral functions that operate
are those with the sub-clock 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 WA-5 is the state transition diagram of the above modes.
24
Mitsubishi microcomputers
M30218 Group
Power control
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Transition of stop mode, wait mode
Reset
All oscillators stopped
CPU operation stopped
WAIT
instruction
CM10 = “1”
Interrupt
Medium-speed mode
(divided-by-8 mode)
Stop mode
Wait mode
Interrupt
Interrupt
WAIT
instruction
All oscillators stopped
CPU operation stopped
High-speed/medium-
speed mode
CM10 = “1”
Stop mode
Wait mode
Interrupt
WAIT
instruction
All oscillators stopped
CPU operation stopped
CM10 = “1”
Interrupt
Low-speed/low power
dissipation mode
Stop mode
Wait mode
Interrupt
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”
CM07 = “0” (Note 1)
CM06 = “1”
CM04 = “0”
CM04 = “1”
(Notes 1, 3)
Main clock is oscillating
Sub clock is oscillating
CM04 = “0”
Medium-speed mode
(divided-by-2 mode)
High-speed mode
Main clock is oscillating
Sub clock is oscillating
BCLK : f(XIN
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
)
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
Medium-speed mode
(divided-by-8 mode)
Low-speed mode
CM07 = “0”
(Note 1, 3)
BCLK : f(XIN)/8
CM07 = “0”
CM06 = “1”
BCLK : f(XCIN
CM07 = “1”
)
Medium-speed mode
(divided-by-4 mode)
Medium-speed mode
(divided-by-16 mode)
CM07 = “1”
(Note 2)
BCLK : f(XIN)/4
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “1”
CM05 = “0”
CM05 = “1”
CM04 = “0”
CM04 = “1”
Main clock is oscillating
Sub clock is stopped
Main clock is stopped
Sub clock is oscillating
Low power dissipation mode
Medium-speed mode
(divided-by-2 mode)
High-speed mode
CM07 = “1” (Note 2)
CM05 = “1”
BCLK : f(XIN
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “0”
)
BCLK : f(XIN)/2
CM07 = “0” CM06 = “0”
CM17 = “0” CM16 = “1”
BCLK : f(XCIN
CM07 = “1”
)
CM07 = “0” (Note 1)
CM06 = “0” (Note 3)
CM04 = “1”
Medium-speed mode
(divided-by-4 mode)
Medium-speed mode
(divided-by-16 mode)
CM06 = “0”
(Notes 1,3)
BCLK : f(XIN)/4
BCLK : f(XIN)/16
CM07 = “0” CM06 = “0”
CM17 = “1” CM16 = “0”
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 WA-5. State transition diagram of Power control mode
25
Mitsubishi microcomputers
M30218 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 WA-6 shows the protect register. The values in the processor
mode register 0 (address 000416), processor mode register 1 (address 000516), system clock control reg-
ister 0 (address 000616), and system clock control register 1 (address 000716) can only be changed when
the respective bit in the protect register is set to “1”.
The system clock control registers 0 and 1 write-enable bit (bit 0 at address 000A16) and processor mode
register 0 and 1 write-enable bit (bit 1 at address 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
Address
000A16
When reset
XXXXX000
2
Bit symbol
PRC0
Bit name
Function
R W
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
registers 0 and 1 (addresses 000416
0 : Write-inhibited
1 : Write-enabled
PRC1
and 000516
)
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminate.
Figure WA-6. Protect register
26
Mitsubishi microcomputers
M30218 Group
Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Overview of Interrupt
Type of Interrupts
Figure DD-1 lists the types of interrupts.
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
Software
INT instruction
Interrupt
Reset
________
DBC
Special
Watchdog timer
Single step
Hardware
Address matched
Peripheral I/O (Note)
Note: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system.
Figure DD-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.
27
Mitsubishi microcomputers
M30218 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 execut-
ing the INT instruction. Software interrupt numbers 0 through 31 are assigned to peripheral I/O inter-
rupts, 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 re-
quest. So far as software numbers 32 through 63 are concerned, the stack pointer does not make a
shift.
28
Mitsubishi microcomputers
M30218 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.
________
• 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 func-
tions 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.
• DMA0 interrupt, DMA1 interrupt
These are interrupts that DMA generates.
• A-D conversion interrupt
This is an interrupt that the A-D converter generates.
• UART0 and UART1 transmission interrupt
These are interrupts that the serial I/O transmission generates.
• UART0 and UART1 reception interrupt
These are interrupts that the serial I/O reception generates.
• SI/O automatic transfer interrupt
This is an interrupt that the SI/O automatic transfer generates.
• Timer A0 interrupt through timer A4 interrupt
These are interrupts that timer A generates
• Timer B0 interrupt through timer B2 interrupt
These are interrupts that timer B generates.
________
________
• INT0 interrupt through INT5 interrupt
______
______
An INT interrupt occurs if either a rising edge or a falling edge is input to the INT pin.
29
Mitsubishi microcomputers
M30218 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 DD-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
Vector address + 0
Vector address + 1
Vector address + 2
Vector address + 3
0 0 0 0
0 0 0 0
High address
0 0 0 0
Figure DD-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 DD-1 shows the interrupts assigned to the fixed vector
tables and addresses of vector tables.
Table DD-1. Interrupts assigned to the fixed vector tables and addresses of vector tables
Interrupt source
Vector table addresses
Address (L) to address (H)
FFFDC16 to FFFDF16
FFFE016 to FFFE316
FFFE416 to FFFE716
Remarks
Undefined instruction
Overflow
Interrupt on UND instruction
Interrupt on INTO instruction
BRK 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
FFFEC16 to FFFEF16
FFFF016 to FFFF316
FFFF416 to FFFF716
FFFF816 to FFFFB16
FFFFC16 to FFFFF16
Single step (Note)
Watchdog timer
________
DBC (Note)
Do not use
-
-
Reset
Note: Interrupts used for debugging purposes only.
30
Mitsubishi microcomputers
M30218 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 ad-
dress 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 DD-2 shows the
interrupts assigned to the variable vector tables and addresses of vector tables.
Table DD-2. Interrupts assigned to the variable vector tables and addresses of vector tables
Vector table address
Address (L) to address (H)
Software interrupt number
Software interrupt number 0
Interrupt source
Remarks
+0 to +3 (Note)
BRK instruction
Cannot be masked I flag
Software interrupt number 7
Software interrupt number 8
Software interrupt number 9
+28 to +31 (Note)
+32 to +35 (Note)
+36 to +39 (Note)
INT3
INT4
INT5
Software interrupt number 11
Software interrupt number 12
+44 to +47 (Note)
+48 to +51 (Note)
DMA0
DMA1
Software interrupt number 14
Software interrupt number 15
+56 to +59 (Note)
+60 to +63 (Note)
A-D
SI/O automatic transfer
Software interrupt number 16
Software interrupt number 17
+64 to +67 (Note)
+68 to +71 (Note)
FLD
UART0 transmit
Software interrupt number 18
Software interrupt number 19
Software interrupt number 20
Software interrupt number 21
Software interrupt number 22
Software interrupt number 23
Software interrupt number 24
Software interrupt number 25
Software interrupt number 26
Software interrupt number 27
Software interrupt number 28
Software interrupt number 29
Software interrupt number 30
Software interrupt number 31
Software interrupt number 32
+72 to +75 (Note)
+76 to +79 (Note)
+80 to +83 (Note)
+84 to +87 (Note)
+88 to +91 (Note)
+92 to +95 (Note)
+96 to +99 (Note)
+100 to +103 (Note)
+104 to +107 (Note)
+108 to +111 (Note)
+112 to +115 (Note)
+116 to +119 (Note)
+120 to +123 (Note)
+124 to +127 (Note)
+128 to +131 (Note)
UART0 receive
UART1 transmit
UART1 receive
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Timer B0
Timer B1
Timer B2
INT0
INT1
INT2
to
to
Cannot be masked I flag
Software interrupt
Software interrupt number 63
+252 to +255 (Note)
Note : Address relative to address in interrupt table register (INTB).
31
Mitsubishi microcomputers
M30218 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 selec-
tion 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 DD-3 shows the memory map of the interrupt control registers.
32
Mitsubishi microcomputers
M30218 Group
Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt control register(Note2)
Symbol
Address
When reset
DMiIC(i=0, 1)
ADIC
ASIOIC
004B16 to 004C16
004E16
XXXXX000
XXXXX000
XXXXX000
XXXXX000
XXXXX000
XXXXX000
XXXXX000
XXXXX000
2
2
2
2
2
2
2
2
004F16
005016
005116, 005316
005216, 005416
005516 to 005916
005A16 to 005C16
FLDIC
SiTIC(i=0, 1)
SiRIC(i=0, 1)
TAiIC(i=0 to 4)
TBiIC(i=0 to 2)
b7 b6 b5 b4 b3 b2 b1 b0
Bit symbol
ILVL0
Bit name
Function
R
W
Interrupt priority level
select bit
b2 b1 b0
0 0 0 : Level 0 (interrupt disabled)
0 0 1 : Level 1
0 1 0 : Level 2
ILVL1
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
ILVL2
IR
Interrupt request bit
(Note1)
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 dose not
generate the interrupt request for that register. For details, see the
precautions for interrupts.
Symbol
Address
When reset
b7 b6 b5 b4 b3 b2 b1 b0
INTiIC(i=0 to 5)
005D16 to 005F16 XX00X000
004716 to 004916
2
0
R
W
Bit symbol
ILVL0
Bit name
Interrupt priority level
select bit
Function
b2 b1 b0
0 0 0 : Level 0 (interrupt disabled)
0 0 1 : Level 1
ILVL1
ILVL2
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
IR
Interrupt request bit
Polarity select bit
0: Interrupt not requested
1: Interrupt requested
(Note1)
POL
0 : Selects falling edge
1 : Selects rising edge
Reserved bit
Always set to “0”
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminate.
Note1 : 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 dose not
generate the interrupt request for that register. For details, see the
precautions for interrupts.
Figure DD-3. Interrupt control registers
33
Mitsubishi microcomputers
M30218 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 DD-3 shows the settings of interrupt priority levels and Table DD-4 shows the interrupt levels
enabled, according to the consist 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 DD-4. Interrupt levels enabled according
to the contents of the IPL
Table DD-3. Settings of interrupt priority
levels
Interrupt priority
level select bit
Interrupt priority
level
Priority
order
IPL
Enabled interrupt priority levels
b2 b1 b0
IPL
2
IPL1
IPL0
Level 0 (interrupt disabled)
0
0
0
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
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 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
0
0
0
1
1
0
Low
0
1
1
1
1
1
0
0
1
1
1
0
1
0
1
High
34
Mitsubishi microcomputers
M30218 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
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
NOP
NOP
FSET
;
I
; Enable interrupts.
Example 2:
INT_SWITCH2:
FCLR
I
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
MOV.W MEM, R0
; Dummy read.
; Enable interrupts.
FSET
I
Example 3:
INT_SWITCH3:
PUSHC FLG
;
FCLR
I
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
POPC FLG ; Enable interrupts.
The reason why two NOP instructions 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 a instruction to rewrite the interrupt control register is executed but the interrupt is disabled, the
interrupt request bit is not set sometimes even if the interrupt request for that register has been gener-
ated. This will depend on the instruction. If this creates problems, use the below instructions to change
the register.
Instructions : AND, OR, BCLR, BSET
35
Mitsubishi microcomputers
M30218 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 ad-
dress 0000016.
(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 DD-4 shows the interrupt response time.
Interrupt request generated
Interrupt request acknowledged
Time
Instruction in
interrupt routine
Instruction
(a)
Interrupt sequence
(b)
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 DD-4. Interrupt response time
36
Mitsubishi microcomputers
M30218 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.
Time (b) is as shown in Table DD-5.
Table DD-5. Time required for executing the interrupt sequence
Interrupt vector address Stack pointer (SP) value
16-Bit bust
8-Bit bus
Even
Even
Odd
18 cycles (Note 1)
19 cycles (Note 1)
19 cycles (Note 1)
20 cycles (Note 1)
20 cycles (Note 1)
20 cycles (Note 1)
20 cycles (Note 1)
20 cycles (Note 1)
Even
Odd (Note 2)
Odd (Note 2)
Even
Odd
________
Note 1: Add 2 cycles in the case of a DBC interrupt; add 1 cycle in the case either of an address coincidence
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
0000
Address bus
Data bus
Indeterminate
Indeterminate
SP-2
SP-4
vec
vec+2
PC
Interrupt
information
SP-2
SP-4
vec
vec+2
contents contents contents contents
R
Indeterminate
W
The indeterminate segment is dependent on the queue buffer.
If the queue buffer is ready to take an instruction, a read cycle occurs.
Figure DD-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 DD-6 is set in the IPL.
Table DD-6. Relationship between interrupts without interrupt priority levels and IPL
Value set in the IPL
Interrupt sources without priority levels
Watchdog timer
7
0
Reset
Other
Not changed
37
Mitsubishi microcomputers
M30218 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 DD-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).
Stack area
Stack area
Address
MSB
Address
MSB
LSB
LSB
[SP]
New stack
pointer value
m – 4
m – 3
m – 2
m – 1
m
m – 4
m – 3
m – 2
m – 1
m
Program counter (PC
Program counter (PC
L
)
M
)
Flag register (FLG )
L
Flag register
(FLG
Program
counter (PC )
H
)
H
[SP]
Stack pointer
value before
interrupt occurs
Content of previous stack
Content of previous stack
Content of previous stack
Content of previous stack
m + 1
m + 1
Stack status before interrupt request
is acknowledged
Stack status after interrupt request
is acknowledged
Figure DD-6. State of stack before and after acceptance of interrupt request
38
Mitsubishi microcomputers
M30218 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, 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 DD-7 shows the operation of the saving registers.
Note: Stack pointer indicated by U flag.
(1) Stack pointer (SP) contains even number
Sequence in which order
registers are saved
Address
Stack area
[SP] – 5 (Odd)
[SP] – 4 (Even)
[SP] – 3(Odd)
[SP] – 2 (Even)
[SP] – 1(Odd)
Program counter (PC )
L
(2) Saved simultaneously,
all 16 bits
Program counter (PC
Flag register (FLG
M
)
L
)
(1) Saved simultaneously,
all 16 bits
Flag register
(FLG
Program
counter (PC )
H
)
H
[SP]
(Even)
Finished saving registers
in two operations.
(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)
Program counter (PC )
L
(3)
(4)
Program counter (PC
Flag register (FLG
M
)
Saved simultaneously,
all 8 bits
L
)
(1)
(2)
Program
counter (PC )
Flag register
(FLG
H
H
)
[SP]
(Odd)
Finished saving registers
in four operations.
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 DD-7. Operation of saving registers
39
Mitsubishi microcomputers
M30218 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 instruc-
tion 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 DD-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 > _D__B___C__ > Watchdog timer > Peripheral I/O > Single step > Address match
Figure DD-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 DD-9 shows the circuit that judges the interrupt priority level.
40
Mitsubishi microcomputers
M30218 Group
Interrupt
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Priority level of each interrupt
Level 0 (initial value)
INT1
Timer B2
Timer B0
Timer A3
Timer A1
High
INT4
INT2
INT0
Timer B1
Timer A4
Timer A2
INT5
Priority of peripheral I/O
interrupts
INT3
(if priority levels are same)
UART1 reception
UART0 reception
FLD
A-D conversion
DMA1
Timer A0
UART1 transmission
UART0 transmission
SI/O2 automatic transfer
DMA0
Low
Processor interrupt priority level
(IPL)
Interrupt request level judgment output
Interrupt
request
accepted
Interrupt enable flag (I flag)
Address match
Watchdog timer
DBC
Reset
Figure DD-9. Maskable interrupts priorities
41
Mitsubishi microcomputers
M30218 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 inter-
rupt enable flag (I flag) and processor interrupt priority level (IPL). The value of the program counter (PC)
for an address match interrupt varies depending on the instruction being executed.
Figure DD-12 shows the address match interrupt-related registers.
Address match interrupt enable register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
AIER
Address
000916
When reset
XXXXXX00
2
Bit symbol
AIER0
Bit name
Function
R W
Address match interrupt 0
enable bit
0 : Interrupt disabled
1 : Interrupt enabled
Address match interrupt 1
enable bit
AIER1
0 : Interrupt disabled
1 : Interrupt enabled
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminate.
Address match interrupt register i (i = 0, 1)
(b19)
b3
(b16)(b15)
b0 b7
(b8)
b0 b7
(b23)
b7
Symbol
RMAD0
RMAD1
Address
001216 to 001016
001616 to 001416
When reset
X0000016
X0000016
b0
Function
Values that can be set
R W
Address setting register for address match interrupt
0000016 to FFFFF16
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminate.
Figure DD-12. Address match interrupt-related registers
42
Mitsubishi microcomputers
M30218 Group
Precautions for Interrupts
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Precautions for Interrupts
(1) Reading address 0000016
• When maskable interrupt is occurred, CPU read 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”.
Reading address 0000016 by software sets enabled highest priority interrupt source request bit to “0”.
Though the interrupt is generated, the interrupt routine may not be executed.
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.
(3) 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 INT5 regardless of the CPU operation clock.
________
________
• When the polarity of the INT0 through INT5 pins is changed, the interrupt request bit is sometimes set to
“1”. After changing the polarity, set the interrupt request bit to “0”. Figure DD-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
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)
______
Figure DD-13. Switching condition of INT interrupt request
43
Mitsubishi microcomputers
M30218 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
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
NOP
NOP
FSET
;
I
; Enable interrupts.
Example 2:
INT_SWITCH2:
FCLR
I
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
MOV.W MEM, R0
; Dummy read.
; Enable interrupts.
FSET
I
Example 3:
INT_SWITCH3:
PUSHC FLG
;
FCLR
I
; Disable interrupts.
AND.B #00h, 0055h ; Clear TA0IC int. priority level and int. request bit.
POPC FLG ; Enable interrupts.
The reason why two NOP instructions 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 a instruction to rewrite the interrupt control register is executed but the interrupt is disabled, the
interrupt request bit is not set sometimes even if the interrupt request for that register has been gener-
ated. This will depend on the instruction. If this creates problems, use the below instructions to change
the register.
Instructions : AND, OR, BCLR, BSET
44
Mitsubishi microcomputers
M30218 Group
Watchdog Timer
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Watchdog Timer
The watchdog timer has the function of detecting when the program is out of control. 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 calcu-
lated as given below. The watchdog timer's period is, however, subject to an error due to the prescaler.
With XIN chosen for BCLK
prescaler dividing ratio (16 or 128) X watchdog timer count (32768)
Watchdog timer period =
BCLK
With XCIN chosen for BCLK
prescaler dividing ratio (2) X watchdog timer count (32768)
Watchdog timer period =
BCLK
For example, suppose that BCLK runs at 10 MHz and that 16 has been chosen for the dividing ratio of the
prescaler, then the watchdog timer's period becomes approximately 52.4 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).
Figure FA-1 shows the block diagram of the watchdog timer. Figure FA-2 shows the watchdog timer-related
registers.
Prescaler
“CM07 = 0”
“WDC7 = 0”
1/16
“CM07 = 0”
“WDC7 = 1”
Watchdog timer
interrupt request
1/128
1/2
BCLK
Watchdog timer
“CM07 = 1”
Write to the watchdog timer
start register
Set to
(address 000E16)
“7FFF16”
RESET
Figure FA-1. Block diagram of watchdog timer
45
Mitsubishi microcomputers
M30218 Group
Watchdog Timer
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Watchdog timer control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
WDC
Address
000F16
When reset
000XXXXX
0
0
2
Bit symbol
Bit name
Function
R W
High-order bit of watchdog timer
Reserved bit
Must always be set to “0”
Must always be set to “0”
Reserved bit
WDC7
Prescaler select bit
0 : Divided by 16
1 : Divided by 128
Watchdog timer start register
b7
b0
Symbol
WDTS
Address
000E16
When reset
Indeterminate
Function
The watchdog timer is initialized and starts counting after a write instruction to
R W
this register. The watchdog timer value is always initialized to “7FFF16
regardless of whatever value is written.
”
Figure FA-2. Watchdog timer control and start registers
46
nt
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAC
This microcomputer has two DMAC (direct memory access controller) channels 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 (16-
bit) or 1-byte (8-bit) data transfer can be performed at high speed. Figure EC-1 shows the block diagram of
the DMAC. Table EC-1 shows the DMAC specifications. Figure EC-2 to Figure EC-3 show the registers
used by the DMAC.
Address bus
DMA0 source pointer SAR0(20)
(addresses 002216 to 002016
DMA0 destination pointer DAR0 (20)
(addresses 002616 to 002416
DMA0 forward address pointer (20) (Note)
)
)
DMA0 transfer counter reload register TCR0 (16)
DMA1 source pointer SAR1 (20)
(addresses 003216 to 003016
DMA1 destination pointer DAR1 (20)
(addresses 003616 to 003416
DMA1 forward address pointer (20) (Note)
(addresses 002916, 002816
)
)
)
DMA0 transfer counter TCR0 (16)
)
DMA1 transfer counter reload register TCR1 (16)
(addresses 003916, 003816
DMA latch high-order bits DMA latch low-order bits
DMA1 transfer counter TCR1 (16)
Data bus low-order bits
Data bus high-order bits
Note: Pointer is incremented by a DMA request.
Figure EC-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.
47
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table EC-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)
Maximum No. of bytes transferred 128K bytes (with 16-bit transfers) or 64K bytes (with 8-bit transfers)
________
________ ________
________
DMA request factors (Note)
Falling edge of INT0 or INT1 (INT0 can be selected by DMA0, INT1 by DMA1)
Timer A0 to timer A4 interrupt requests
Timer B0 to timer B2 interrupt requests
UART0 transmission and reception interrupt requests
UART1 transmission and reception interrupt requests
A-D conversion interrupt requests
Software triggers
Channel priority
DMA0 takes precedence if DMA0 and DMA1 requests are generated simultaneously
8 bits or 16 bits
Transfer unit
Transfer address direction
forward or 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”, the DMAC is active.
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”, the DMAC is inactive.
• After the transfer counter underflows in single transfer mode
At the time of starting data transfer immediately after turning the DMAC active, re
the value of one of source pointer and destination pointer - the one specified for the
forward direction - is reloaded to the forward direction address pointer,and the value
of the transfer counter reload register is reloaded to the transfer counter.
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”.
Forward address pointer and
load timing for transfer
counter
Writing to register
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.
48
nt
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAi request cause select register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DMiSL(i=0,1)
Address
03B816,03BA16
When reset
0016
Bit symbol
DSEL0
Bit name
Function
R
W
b3 b2 b1 b0
DMA request cause
select bit
0 0 0 0 : Falling edge of INT0 / INT1
pin (Note)
0 0 0 1 : Software trigger
0 0 1 0 : Timer A0
0 0 1 1 : Timer A1
0 1 0 0 : Timer A2
0 1 0 1 : Timer A3
0 1 1 0 : Timer A4
0 1 1 1 : Timer B0
1 0 0 0 : Timer B1
1 0 0 1 : Timer B2
DSEL1
DSEL2
1 0 1 0 : UART0 transmit
1 0 1 1 : UART0 receive
1 1 0 0 : UART1 transmit
1 1 0 1 : UART1 receive
1 1 1 0 : A-D conversion
1 1 1 1 : Inhibited
DSEL3
Nothing is assigned. In an attempt to write to these bits, write “0”.
The value, if read, turns out to be “0”.
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”)
Software DMA request bit
DSR
Note: Address 03B816 is for INT0; address 03BA16 is for INT1.
DMAi control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DMiCON(i=0,1)
Address
002C16, 003C16
When reset
00000X00
2
Bit symbol
DMBIT
Bit name
Function
R
W
Transfer unit bit select bit
0 : 16 bits
1 : 8 bits
Repeat transfer mode
select bit
0 : Single transfer
1 : Repeat transfer
DMASL
DMAS
DMAE
0 : DMA not requested
1 : DMA requested
DMA request bit (Note 1)
DMA enable bit
(Note 2)
0 : Disabled
1 : Enabled
Source address direction
select bit (Note 3)
0 : Fixed
1 : Forward
DSD
DAD
Destination address
direction select bit (Note 3)
0 : Fixed
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 EC-2. DMAC-related registers (1)
49
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAi source pointer (i = 0, 1)
(b19)
b3
(b16)(b15)
b0 b7
(b8)
b0 b7
(b23)
b7
b0
Symbol
SAR0
SAR1
Address
002216 to 002016
003216 to 003016
When reset
Indeterminate
Indeterminate
Transfer count
specification
Function
R W
• Source pointer
Stores the source address
0000016 to FFFFF16
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
DMAi destination pointer (i = 0, 1)
(b19)
b3
(b16)(b15)
b0 b7
(b8)
b0 b7
(b23)
b7
b0
Symbol
DAR0
DAR1
Address
002616 to 002416
003616 to 003416
When reset
Indeterminate
Indeterminate
Transfer count
specification
Function
R W
• Destination pointer
Stores the destination address
0000016 to FFFFF16
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
DMAi transfer counter (i = 0, 1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
TCR0
TCR1
Address
002916, 002816
003916, 003816
When reset
Indeterminate
Indeterminate
Transfer count
specification
Function
R W
• Transfer counter
Set a value one less than the transfer count
000016 to FFFF16
Figure EC-3. DMAC-related registers (2)
50
nt
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(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.
(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.
Figure EC-4 shows the example of the transfer cycles (a state of internal bus) for a source read. For
convenience, the destination write cycle is shown as one cycle and the source read cycles for the differ-
ent 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.
(1) 8-bit transfers
16-bit transfers and the source address is even.
BCLK
Address
bus
Dummy
cycle
CPU use
Source
Destination
CPU use
RD signal
WR signal
Data
bus
Dummy
cycle
CPU use
Source
Destination
CPU use
(2) 16-bit transfers and the source address is odd
BCLK
Address
bus
Dummy
cycle
CPU use
Source
Source + 1 Destination
CPU use
RD signal
WR signal
Data
bus
Dummy
cycle
CPU use
Source + 1
CPU use
Source
Destination
Note: The same timing changes occur with the respective conditions at the destination as at the source.
Figure EC-4. Example of transfer cycles for a source read (the state of internal bus)
51
Mitsubishi microcomputers
M30218 Group
DMAC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) DMAC Transfer
Any combination of even or odd transfer read and write addresses is possible. Table EC-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 EC-2. No. of DMAC transfer cycles
singelchip mode
Transfer unit
Access address
No. of
No. of
read cycles
write cycles
8-bit transfers
(DMBIT="1")
16-bit transfers
(DMBIT="0")
Even
Odd
1
1
1
2
1
1
1
2
Even
Odd
Coefficient j, k
Internal memory
Internal ROM/RAM
1
SFR area
2
52
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FLD Controller
The M30218 group has fluorescent display (FLD) drive and control circuits.
Table KA-0 shows the FLD controller specifications.
Table KA-0. FLD controller specifications
Specification
Item
• 52 pins ( 20 pins can switch general purpose port)
High-breakdown-volt-
age output port
CMOS port
FLD
controller
port
• 4 pins ( 4 pins can switch general purpose port)
(A driver must be installed externally)
• Used FLD output
Display pixel number
28 segment X 28 digit (segment number + digit number ≤ 56)
• Used digit output
40 segment X 16 digit (segment number ≤ 40, digit number ≤ 16)
• Connected to M35501
56 segment X (connect number of M35501) digit
(segment number ≤ 56, digit number ≤ number of M35501 X 16)
• Used P44 to P47 expansion
52 segment X 16 digit (segment number ≤ 52, digit number ≤ 16)
• 3.2 µs to 819.2 µs (count source XIN/32,10MHz)
• 12.8 µs to 3276.8 µs (count source XIN/128,10MHz)
• 3.2 µs to 819.2 µs (count source XIN/32,10MHz)
• 12.8 µs to 3276.8 µs (count source XIN/128,10MHz)
• Digit interrupt
Period
Dimmer time
Interrupt
• FLD blanking interrupt
• Key-scan used digit
Key-scan
• Key-scan used segment
• Digit pulse output function
Expand function
This function automatically outputs digit pulse.
• M35501 connect function
The number of digits can be increased easily by using the output of
DIMOUT(P97) as CLK for the M35501.
• Toff section generate / not generate function
This function does not generate Toff1 section when the connected outputs
are the same.
• Gradation display function
This function allows each segment to be set for dark or bright display.
• P44 to P47 expansion function
This function provides 16 lines of digit outputs from four ports by attaching a
4
16 decoder.
53
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Main
Local
Main address bus
Digit output set register
data bus data bus
P60/FLD0 DIG/FLD
P61/FLD1 DIG/FLD
P62/FLD2 DIG/FLD
050016
8
DIG/FLD
P63/FLD3
P64/FLD4 DIG/FLD
P65/FLD5 DIG/FLD
P66/FLD6
P67/FLD7
03EC16
DIG/FLD
DIG/FLD
035D16
Local address bus
P50/FLD8 DIG/FLD
P51/FLD9 DIG/FLD
P52/FLD10
DIG/FLD
8
P53/FLD11 DIG/FLD
P54/FLD12 DIG/FLD
P55/FLD13 DIG/FLD
P56/FLD14 DIG/FLD
P57/FLD15 DIG/FLD
05DF16
03E916
035C16
P00/FLD16
P01/FLD17
P02/FLD18
P03/FLD19
P04/FLD20
P05/FLD21
P06/FLD22
8
P07/FLD23
03E016
P10/FLD24
P11/FLD25
P12/FLD26
P13/FLD27
P14/FLD28
P15/FLD29
P16/FLD30
8
P17/FLD31
03E116
FLD/P P20/FLD32
FLD/P P21/FLD33
FLDC mode register
(035016)
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
035916
P22/FLD34
P23/FLD35
P24/FLD36
P25/FLD37
P26/FLD38
8
FLD data pointer
reload register
(035816)
P27/FLD39
03E416
FLD/P P30/FLD40
FLD/P P31/FLD41
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
035A16
P32/FLD42
P33/FLD43
P34/FLD44
P35/FLD45
P36/FLD46
Address
decoder
8
FLD data pointer
(035816)
P37/FLD47
03E516
FLD/P P40/FLD48
FLD/P P41/FLD49
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
035B16
P42/FLD50
P43/FLD51
P44/FLD52
P45/FLD53
P46/FLD54
8
P47/FLD55
03E816
FLD/port switch register
FLD blanking interrupt
FLD digit interrupt
Timing generator
Figure KA-1. Block Diagram for FLD Control Circuit
54
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FLDC mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FLDM
Address
035016
When reset
0016
Bit symbol
FLDM0
Bit name
Function
R W
Automatic display
control bit
0 : General-purpose mode
1 : Automatic display mode
Display start bit
0 : Stop display
1 : Display
(start to display by switching “0” to “1”)
FLDM1
b3b2
Tscan control bits
FLDM2
FLDM3
00 : FLD digit interrupt
(at rising edge of each digit)
01 : 1 X Tdisp
10 : 2 X Tdisp
11 : 3 X Tdisp
FLD blanking
interrupt (at falling
edge of last digit)
}
Timing number control bit
0 : 16 timing mode
1 : 32 timing mode
FLDM4
FLDM5
FLDM6
FLDM7
Gradation display mode
selection control bit
0 : Not selecting
1 : Selecting (Note )
Tdisp counter
count source selection bit
0 : f(XIN)/32
1 : f(XIN)/128
High-breakdown voltage
port drivability select bit
0 : Drivability strong
1 : Drivability weak
Note : When a gradation display mode is selected, a number of timing is max. 16 timing.
(Set the timing number control bit to “0”.)
FLD output control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FLDCON
Address
035116
When reset
0016
Bit symbol
Bit name
to P4 FLD
output reverse bit
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be “0”.
Function
0 : Output normally
1 : Reverse output
R W
P44
7
FLDCON0
P4
4
to P4
7
FLD
0 : Perform normally
1 : Toff is invalid
FLDCON2
Toff is invalid bit
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be “0”.
P9
control bit
7
dimmer output
0 : Output normally
1 : Dimmer output
FLDCON4
FLDCON5
CMOS ports: section of
Toff generate/not
generate bit
0 : section of Toff does NOT generate
1 : section of Toff generates
High-breakdown-voltage ports:
section of Toff
generate/not generate bit
0 : section of Toff does NOT generate
1 : section of Toff generates
FLDCON6
FLDCON7
Toff2
0 : gradation display data is reset at Toff2
(set at Toff1)
SET/RESET change bit
1 : gradation display data is set at Toff2
(reset at Toff1)
Tdisp time set register
b7
b0
Symbol
TDISP
Address
035216
When reset
0016
R W
Function
Values that can be set
Counts Tdisp time. Count source is selected by Tdisp
counter count source select bit.
016 to FF16
Figure KA-2. FLDC-related Register(1)
55
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Toff1 time set register
b7
b0
Symbol
TOFF1
Address
035416
When reset
FF16
Values that can be set
3 to FF16
R W
Function
Counts Toff1 time. Count source is selected by Tdisp counter count source
select bit.
Toff2 time set register
b7
b0
Symbol
TOFF2
Address
035616
When reset
FF16
Values that can be set R W
3 to FF16
Function
Counts Toff2 time. Count source is selected by Tdisp counter count source
select bit.
FLD data pointer
b7
Symbol
FLDDP
Address
035816
When reset
indeterminate
b0
Values that can be set
1 to 1F16
Function
R W
Counts FLD output timing. Set this register to “FLD output data - 1 ”.
Note: Reading the FLD data pointer takes out the count at that moment.
Port P2 FLD / port switch register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
P2FPR
Address
035916
When reset
0016
Bit symbol
R W
Bit name
0 FLD/port switch bit
Function
0 : Normal port
1 : FLD output port
Port P2
P2FPR0
P2FPR1
P2FPR2
P2FPR3
P2FPR4
P2FPR5
P2FPR6
0 : Normal port
1 : FLD output port
Port P21 FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P2
2
FLD/port switch bit
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P2
3
0 : Normal port
1 : FLD output port
Port P2
4
5
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P2
0 : Normal port
1 : FLD output port
Port P2
6
0 : Normal port
1 : FLD output port
Port P2
7
P2FPR7
Figure KA-2A. FLDC-related Register(2)
56
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port P3 FLD / port switch register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
P3FPR
Address
035A16
When reset
0016
Bit symbol
R W
R W
R W
Bit name
Function
Function
Function
0 : Normal port
1 : FLD output port
Port P3
0
FLD/port switch bit
P3FPR0
P3FPR1
P3FPR2
P3FPR3
P3FPR4
P3FPR5
P3FPR6
0 : Normal port
1 : FLD output port
Port P3
1
2
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P3
FLD/port switch bit
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P3
3
0 : Normal port
1 : FLD output port
Port P3
4
5
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P3
0 : Normal port
1 : FLD output port
Port P3
6
0 : Normal port
1 : FLD output port
Port P3
7
P3FPR7
Port P4 FLD / port switch register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
P4FPR
Address
035B16
When reset
0016
Bit symbol
Bit name
0 : Normal port
1 : FLD output port
Port P4
0
FLD/port switch bit
P4FPR0
P4FPR1
P4FPR2
P4FPR3
P4FPR4
P4FPR5
P4FPR6
0 : Normal port
1 : FLD output port
Port P4
1
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P4
2
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P4
3 FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P4
4
5
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
FLD/port switch bit
0 : Normal port
1 : FLD output port
Port P4
0 : Normal port
1 : FLD output port
Port P4
6
0 : Normal port
1 : FLD output port
Port P4
7
P4FPR7
Port P5 digit output set register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
P5DOR
Address
035C16
When reset
0016
Bit symbol
P5DOR0
Bit name
0 : FLD output
1 : Digit output
Port P5
0
1
2
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P5
Port P5
FLD/digit switch bit
P5DOR1
P5DOR2
P5DOR3
P5DOR4
P5DOR5
P5DOR6
0 : FLD output
1 : Digit output
FLD/digit switch bit
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P5
3
0 : FLD output
1 : Digit output
Port P5
4
5
FLD/digit switch bit
FLD/digit switch bit
FLD/digit switch bit
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P5
0 : FLD output
1 : Digit output
Port P5
6
0 : FLD output
1 : Digit output
Port P5
7
P5DOR7
Figure KA-2B. FLDC-related Register(3)
57
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port P6 digit output set register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
P6DOR
Address
035D16
When reset
0016
R W
Bit symbol
Bit name
Function
0 : FLD output
1 : Digit output
Port P6
0
FLD/digit switch bit
P6DOR0
P6DOR1
P6DOR2
P6DOR3
P6DOR4
P6DOR5
P6DOR6
0 : FLD output
1 : Digit output
Port P6
1
2
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P6
FLD/digit switch bit
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P6
3
0 : FLD output
1 : Digit output
Port P6
4
5
FLD/digit switch bit
FLD/digit switch bit
FLD/digit switch bit
FLD/digit switch bit
0 : FLD output
1 : Digit output
Port P6
0 : FLD output
1 : Digit output
Port P6
6
0 : FLD output
1 : Digit output
Port P6
7
P6DOR7
Figure KA-2C. FLDC-related Register(4)
58
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FLD automatic display pins
P0 to P6 are the pins capable of automatic display output for the FLD. The FLD start operating by setting
the automatic display control bit (bit 0 at address 035016) to “1”. There is the FLD output function that
outputs RAM contents from the port every timing or the digit output function that drives the port high with
digit timing. The FLD can be displayed using the FLD output for the segments and the digit or FLD output for
the digits. When using the FLD output for the digits, be sure to write digit display patterns to the RAM in
advance. The remaining segment and digit lines can be used as general-purpose ports. Settings of each
port are shown below.
Table KA-1. Pins in FLD Automatic Display Mode
Port Name Automatic Display Pins Setting Method
The individual bits of the digit output set register (address 035C16,
035D16) can set each pin either FLD port (“0”) or digit port (“1”).
When the pins are set for the digit port, the digit pulse output func-
tion is enabled, so the digit pulses can always be output regardless
the value of FLD automatic display RAM.
P5, P6
FLD0 to FLD15
FLD exclusive use port (automatic display control bit (bit 0 of ad-
dress 035016)=“1”)
P0, P1
FLD16 to FLD31
FLD32 to FLD51
The individual bits of the FLD/port switch register (addresses
035916 to 035B16) can set each pin to either FLD port (“1”) or gen-
eral-purpose port (“0”).
P2, P3,
P44 to P43
The individual bits of the FLD/port switch register (address 035B16)
can set each pin to either FLD port (“1”) or general-purpose port
(“0”). The digit pulse output function turns to available, and the digit
pulse can output by setting of the FLD output set register (address
035116). The port output format is the CMOS output. When using
the port as a display pin, a driver must be installed externally.
P44 to P47 FLD52 to FLD55
Setting example 1
Setting example 2
Shown below is a register setup example where only FLD output is used.
In this case, the digit display output pattern must be set in the FLD automatic
display RAM in advance.
Shown below is a register setup example where both FLD output and digit waveform
output are used. In this case, because the digit display output is automatically
generated, there is no need to set the display pattern in the FLD automatic display RAM.
The contents of digit output set register
(035C16, 035D16)
The contents of digit output set register
(035C16, 035D16)
Number of segments
Number of digits
Number of segments
Number of digits
28
12
36
16
FLD
FLD
FLD
FLD
FLD
FLD
FLD
FLD
0
(DIG output
)
FLD
FLD
FLD
FLD
FLD
FLD
FLD
FLD
0
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
1
1
1
1
1
0
0
0
0
0
Port P6
Port P6
1
2
3
4
5
6
7
1
2
3
4
5
6
7
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
(DIG output)
FLD/port switch register
FLD/port switch register
0
1
(035916, 035B16)
0
(035916, 035B16)
1
0
1
FLD
8
9
(DIG output)
(DIG output)
1
1
1
1
1
1
1
1
FLD32(SEG output)
FLD33(SEG output)
FLD34(SEG output)
FLD35(SEG output)
FLD36(SEG output)
FLD37(SEG output)
FLD38(SEG output)
FLD39(SEG output)
FLD
FLD
8
9
(DIG output)
(DIG output)
1
1
1
1
1
1
1
1
FLD32(SEG output)
FLD33(SEG output)
FLD34(SEG output)
FLD35(SEG output)
FLD36(SEG output)
FLD37(SEG output)
FLD38(SEG output)
FLD39(SEG output)
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
Port P5
Port P5
Port P2
Port P2
FLD
FLD10(DIG output)
FLD11(DIG output)
FLD12(DIG output)
FLD13(DIG output)
FLD14(DIG output)
FLD15(DIG output)
FLD10(DIG output)
FLD11(DIG output)
FLD12(SEG output)
FLD13(SEG output)
FLD14(SEG output)
FLD15(SEG output)
FLD16(SEG output)
FLD17(SEG output)
FLD18(SEG output)
FLD19(SEG output)
FLD20(SEG output)
FLD21(SEG output)
FLD22(SEG output)
FLD23(SEG output)
FLD16(SEG output)
FLD17(SEG output)
FLD18(SEG output)
FLD19(SEG output)
FLD20(SEG output)
FLD21(SEG output)
FLD22(SEG output)
FLD23(SEG output)
1
1
1
1
0
0
0
0
FLD40(SEG output)
FLD41(SEG output)
FLD42(SEG output)
FLD43(SEG output)
FLD44(port output)
FLD45(port output)
FLD46(port output)
FLD47(port output)
FLD40(SEG output)
FLD41(SEG output)
FLD42(SEG output)
FLD43(SEG output)
FLD44(SEG output)
1
1
1
1
Port P0
Port P0
Port P3
Port P3
1
1
1
1
FLD45(SEG output)
FLD46(SEG output)
FLD47(SEG output)
FLD24(SEG output)
FLD25(SEG output)
FLD26(SEG output)
FLD27(SEG output)
FLD28(SEG output)
FLD29(SEG output)
FLD30(SEG output)
FLD31(SEG output)
FLD24(SEG output)
FLD25(SEG output)
FLD26(SEG output)
FLD27(SEG output)
FLD28(SEG output)
FLD29(SEG output)
FLD30(SEG output)
FLD31(SEG output)
0
0
0
0
0
0
0
0
FLD48(port output)
FLD49(port output)
FLD50(port output)
FLD51(port output)
FLD52(port output)
FLD53(port output)
FLD54(port output)
FLD55(port output)
FLD48(SEG output)
FLD49(SEG output)
FLD50(SEG output)
FLD51(SEG output)
FLD52(port output)
FLD53(port output)
FLD54(port output)
FLD55(port output)
1
1
1
1
0
0
0
0
Port P1
Port P1
Port P4
Port P4
DIG output : This output is connected to digit of the FLD.
SEG output : This output is connected to segment of the FLD.
Port output : This output is general-purpose port ( used program).
DIG output : This output is connected to digit of the FLD.
SEG output : This output is connected to segment of the FLD.
Port output : This output is general-purpose port ( used program).
Figure KA-3. Segment/Digit Setting Example
59
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FLD automatic display RAM
The FLD automatic display RAM uses the 224 bytes of addresses 050016 to 05DF16. For FLD, the 3 modes
of 16-timing ordinary mode, 16-timing•gradation display mode and 32-timing mode are available depending
on the number of timings and the use/not use of gradation display.
The automatic display RAM in each mode is as follows:
(1) 16-timing•Ordinary Mode
This mode is used when the display timing is 16 or less. The 112 bytes of addresses 057016 to 05DF16
are used as a FLD display data store area. Because addresses 050016 to 056F16 are not used as the
automatic display RAM, they can be the ordinary RAM.
(2) 16-timing•Gradation Display Mode
This mode is used when the display timing is 16 or less, in which mode each segment can be set for dark
or bright display. The 224 bytes of addresses 050016 to 05DF16 are used. The 112 bytes of addresses
057016 to 05DF16 are used as an FLD display data store area, while the 112 bytes of addresses 050016
to 056F16 are used as a gradation display control data store area.
(3) 32-timing Mode
This mode is used when the display timing is 16 or greater. This mode can be used for up to 32-timing.
The 224 bytes of addresses 050016 to 05DF16 are used as an FLD display data store area.
The FLD data pointer (address 035816) is a register to count display timings. This pointer has a reload
register and when the terminal count is reached, it starts counting over again after being reloaded with the
initial count. Make sure the timing count – 1 is set to the FLD data pointer. When writing data to this address,
the data is written to the FLD data pointer reload register; when reading data from this address, the value in
the FLD data pointer is read.
16-timing•ordinary mode 16-timing•gradation display mode
32-timing mode
050016
050016
050016
Gradation display
control data stored
area
Not used
1 to 32 timing display
data stored area
057016
05DF16
057016
05DF16
1 to 16 timing display
data stored area
1 to 16 timing display
data stored area
05DF16
Figure KA-4. FLD Automatic Display RAM Assignment
60
Mitsubishi microcomputers
M30218 Group
FLD controller
Data setup
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) 16-timing•Ordinary Mode
The area of addresses 057016 to 05DF16 are used as a FLD automatic display RAM.
When data is stored in the FLD automatic display RAM, the last data of FLD port P4 is stored at address 057016, the
last data of FLD port P3 is stored at address 058016, the last data of FLD port P2 is stored at address 059016, the last
data of FLD port P1 is stored at address 05A016, the last data of FLD port P0 is stored at address 05B016,
the last data of FLD port P5 is stored at address 05C016
assign in sequence from the last data respectively.
, and the last data of FLD port P6 is stored at address 05D016, to
The first data of the FLD port P4, P3, P2, P1, P0, P5, and P6 is stored at an address which adds the value of (the
timing number – 1) to the corresponding address 057016, 058016, 059016, 05A016, 05B016, 05C016 and 05DF16.
Set the FLD data pointer reload register to the value given by the number of digits – 1.
(2) 16-timing•Gradation Display Mode
Display data setting is performed in the same way as that of the 16-timing•ordinary mode. Gradation display control
data is arranged at an address resulting from subtracting 007016 from the display data store address of each timing
and pin. Bright display is performed by setting “0”, and dark display is performed by setting “1” .
(3) 32-timing Mode
The area of addresses 050016 to 05DF16 are used as a FLD automatic display RAM.
When data is stored in the FLD automatic display RAM, the last data of FLD port P4 is stored at address 050016, the
last data of FLD port P3 is stored at address 052016, the last data of FLD port P2 is stored at address 054016,
the last data of FLD port P1 is stored at address 056016, the last data of FLD port P0 is stored at address 058016, the
last data of FLD port P5 is stored at address 05A016, and the last data of FLD port P6 is stored at address 05C016
, to
assign in sequence from the last data respectively
.
The first data of the FLD port P4, P3, P2, P0, P1, P5, and P6 is stored at an address which adds the value of (the
timing number – 1) to the corresponding address 050016, 052016, 054016, 056016, 058016, 05A016 and 05C016.
Set the FLD data pointer reload register to the value given by the number of digits - 1.
Number of timing: 8
(FLD data pointer reload register = 7)
Bit
Bit
Address
7
6
5
4
3
2
1
0
Address
7
6
5
4
3
2
1
0
057016
057116
057216
057316
057416
057516
057616
057716
057816
057916
057A16
057B16
057C16
057D16
057E16
057F16
058016
058116
058216
058316
058416
058516
058616
058716
058816
058916
058A16
058B16
058C16
058D16
058E16
058F16
059016
059116
059216
059316
059416
059516
059616
059716
059816
059916
059A16
059B16
059C16
059D16
059E16
059F16
05A016
05A116
05A216
05A316
05A416
05A516
05A616
05A716
05A816
05A916
05AA16
05AB16
05AC16
05AD16
05AE16
05AF16
05B016
05B116
05B216
05B316
05B416
05B516
05B616
05B716
05B816
05B916
05BA16
05BB16
05BC16
05BD16
05BE16
The last timing
(The last data of FLDP4)
The last timing
(The last data of FLDP0)
Timing for start
(The first data of FLDP4)
Timing for start
(The first data of FLDP0)
FLDP4 data area
FLDP0 data area
05BF16
05C016
The last timing
(The last data of FLDP5)
The last timing
(The last data of FLDP3)
05C116
05C216
05C316
05C416
05C516
05C616
05C716
05C816
05C916
05CA16
05CB16
05CC16
05CD16
05CE16
05CF16
05D016
05D116
05D216
05D316
05D416
05D516
05D616
05D716
05D816
05D916
05DA16
05DB16
05DC16
05DD16
05DE16
05DF16
Timing for start
(The first data of FLDP5)
Timing for start
(The first data of FLDP3)
FLDP5 data area
FLDP3 data area
The last timing
(The last data of FLDP6)
The last timing
(The last data of FLDP2)
Timing for start
(The first data of FLDP2)
Timing for start
(The first data of FLDP6)
FLDP6 data area
FLDP2 data area
The last timing
(The last data of FLDP1)
Timing for start
(The first data of FLDP1)
FLDP1 data area
Figure KA-5. Example of Using the FLD Automatic Display RAM in 16-timing•Ordinary Mode
61
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Number of timing: 15
(FLD data pointer reload register = 14)
Bit
Bit
Address
Address
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
057016
057116
057216
057316
057416
057516
057616
057716
057816
057916
057A16
057B16
057C16
057D16
057E16
057F16
058016
058116
058216
058316
058416
058516
058616
058716
058816
058916
058A16
058B16
058C16
058D16
058E16
058F16
059016
050016
050116
050216
050316
050416
050516
050616
050716
050816
The last timing
(The last data of FLDP4)
The last timing
(The last data of FLDP4)
050916
050A16
FLDP4 data area
FLDP4 gradation
display data area
050B16
050C16
050D16
050E16
050F16
051016
051116
051216
051316
051416
051516
051616
051716
051816
051916
051A16
051B16
051C16
051D16
051E16
051F16
052016
Timing for start
(The first data of FLDP4)
Timing for start
(The first data of FLDP4)
The last timing
(The last data of FLDP3)
The last timing
(The last data of FLDP3)
FLDP3 data area
FLDP3 gradation
display data area
Timing for start
(The first data of FLDP3)
Timing for start
(The first data of FLDP3)
The last timing
(The last data of FLDP2)
The last timing
(The last data of FLDP2)
059116
059216
059316
059416
059516
059616
059716
059816
059916
059A16
059B16
059C16
059D16
059E16
059F16
05A016
05A116
05A216
05A316
05A416
05A516
05A616
05A716
05A816
05A916
05AA16
05AB16
05AC16
05AD16
05AE16
05AF16
05B016
05B116
05B216
05B316
05B416
05B516
05B616
05B716
05B816
05B916
05BA16
05BB16
05BC16
05BD16
05BE16
05BF16
05C016
05C116
05C216
05C316
05C416
05C516
05C616
05C716
05C816
05C916
05CA16
05CB16
05CC16
05CD16
05CE16
05CF16
05D016
05D116
05D216
05D316
05D416
05D516
05D616
05D716
05D816
05D916
05DA16
05DB16
05DC16
05DD16
05DE16
05DF16
052116
052216
052316
052416
052516
052616
052716
052816
052916
052A16
052B16
052C16
052D16
052E16
052F16
053016
053116
053216
053316
053416
053516
053616
053716
053816
053916
053A16
053B16
053C16
053D16
053E16
053F16
054016
054116
054216
FLDP2 data area
FLDP2 gradation
display data area
Timing for start
(The first data of FLDP2)
Timing for start
(The first data of FLDP2)
The last timing
(The last data of FLDP1)
The last timing
(The last data of FLDP1)
FLDP1 data area
FLDP1 gradation
display data area
Timing for start
(The first data of FLDP1)
Timing for start
(The first data of FLDP1)
The last timing
(The last data of FLDP0)
The last timing
(The last data of FLDP0)
054316
054416
054516
054616
054716
054816
054916
054A16
054B16
054C16
054D16
054E16
054F16
055016
055116
055216
055316
055416
055516
055616
055716
055816
055916
055A16
055B16
055C16
055D16
055E16
055F16
056016
056116
056216
056316
056416
056516
056616
056716
056816
056916
056A16
056B16
056C16
056D16
056E16
056F16
FLDP0 data area
FLDP0 gradation
display data area
Timing for start
(The first data of FLDP0)
Timing for start
(The first data of FLDP0)
The last timing
(The last data of FLDP5)
The last timing
(The last data of FLDP5)
FLDP5 data area
FLDP5 gradation
display data area
Timing for start
(The first data of FLDP5)
Timing for start
(The first data of FLDP5)
The last timing
(The last data of FLDP6)
The last timing
(The last data of FLDP6)
FLDP6 data area
FLDP6 gradation
display data area
Timing for start
(The first data of FLDP6)
Timing for start
(The first data of FLDP6)
Figure KA-6. Example of Using the FLD Automatic Display RAM in 16-timing•Gradation Display Mode
62
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Number of timing: 20
(FLD data pointer reload register = 19)
Bit
Bit
Address
Address
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
057016
057116
057216
057316
057416
057516
057616
057716
057816
057916
057A16
057B16
057C16
057D16
057E16
057F16
058016
058116
058216
058316
058416
058516
058616
058716
058816
058916
058A16
058B16
058C16
058D16
058E16
058F16
059016
050016
050116
050216
050316
050416
050516
050616
050716
050816
The last timing
(The last data of FLDP4)
Timing for start
(The first data of FLDP1)
050916
050A16
050B16
050C16
050D16
050E16
050F16
051016
051116
051216
051316
051416
051516
051616
051716
051816
051916
051A16
051B16
051C16
051D16
051E16
051F16
052016
FLDP4 data area
The last timing
(The last data of FLDP0)
Timing for start
(The first data of FLDP4)
FLDP0 data area
The last timing
(The last data of FLDP3)
059116
059216
059316
059416
059516
059616
059716
059816
059916
059A16
059B16
059C16
059D16
059E16
059F16
05A016
05A116
05A216
05A316
05A416
05A516
05A616
05A716
05A816
05A916
05AA16
05AB16
05AC16
05AD16
05AE16
05AF16
05B016
05B116
05B216
05B316
05B416
05B516
05B616
05B716
05B816
05B916
05BA16
05BB16
05BC16
05BD16
05BE16
05BF16
05C016
05C116
05C216
05C316
05C416
05C516
05C616
05C716
05C816
05C916
05CA16
05CB16
05CC16
05CD16
05CE16
05CF16
05D016
05D116
05D216
05D316
05D416
05D516
05D616
05D716
05D816
05D916
05DA16
05DB16
05DC16
05DD16
05DE16
05DF16
052116
052216
052316
052416
052516
052616
052716
052816
052916
052A16
052B16
052C16
052D16
052E16
052F16
053016
053116
053216
053316
053416
053516
053616
053716
053816
053916
053A16
053B16
053C16
053D16
053E16
053F16
054016
054116
054216
Timing for start
(The first data of FLDP0)
FLDP3 data area
The last timing
(The last data of FLDP5)
Timing for start
(The first data of FLDP3)
FLDP5 data area
The last timing
(The last data of FLDP2)
Timing for start
(The first data of FLDP5)
054316
054416
054516
054616
054716
054816
054916
054A16
054B16
054C16
054D16
054E16
054F16
055016
055116
055216
055316
055416
055516
055616
055716
055816
055916
055A16
055B16
055C16
055D16
055E16
055F16
056016
056116
056216
056316
056416
056516
056616
056716
056816
056916
056A16
056B16
056C16
056D16
056E16
056F16
FLDP2 data area
The last timing
(The last data of FLDP6)
Timing for start
(The first data of FLDP2)
FLDP6 data area
The last timing
(The last data of FLDP1)
Timing for start
(The first data of FLDP6)
FLDP1 data area
Figure KA-7. Example of Using the FLD Automatic Display RAM in 32-timing Mode
63
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timing setting
Each timing is set by the FLDC mode register, Tdisp time set register, Toff1 time set register, and Toff2 time set register.
•Tdisp time setting
The Tdisp time represents the length of display timing. In non-gradation display mode, it consists of a
FLD display output period and a Toff1 time. In gradation display mode, it consists of the display output
period and Toff1 time plus a low signal output period for dark display. Set the Tdisp time by the Tdisp
counter count source select bit of the FLDC mode register and the Tdisp time set register. Supposing that
the value of the Tdisp time set register is n, the Tdisp time is represented as Tdisp = (n+1) x t (t: count
source). When the Tdisp counter count source select bit of the FLDC mode register is “0” and the value
of the Tdisp time set register is 200 (C816), the Tdisp time is: Tdisp = (200+1) x 3.2 (at XIN= 10 MHz) =
643 µs. When reading the Tdisp time set register, the value in the counter is read out.
•Toff1 time setting
The Toff1 time represents a non-output (low signal output) time to prevent blurring of FLD, and to dim the
display. Use the Toff1 time set register to set this Toff1 time. Make sure the value set to Toff1 is smaller
than Tdisp and Toff2. Supposing that the value of the Toff1 time set register is n1, the Toff1 time is
represented as Toff1 = n1 x t. When the Tdisp counter count source select bit of the FLDC mode register
is “0” and the value of the Toff1 time set register is 30 (1E16), Toff1 = 30 x 3.2 (at XIN = 10 MHz) = 96 µs.
•Toff2 time setting
The Toff2 time is provided for dark display. For bright display, the FLD display output remains effective
until the counter that is counting Tdisp reaches the terminal count. For dark display, however, “L” (or “off”)
signal is output when the counter that is counting Toff2 reaches the terminal count. This Toff2 time setting
is valid only for FLD ports which are in the gradation display mode and whose gradation display control
RAM value is “1” .
Set the Toff2 time by the Toff2 time set register. Make sure the value set to Toff2 is smaller than Tdisp but
larger than Toff1. Supposing that the value of the Toff2 time set register is n2, the Toff2 time is repre-
sented as Toff2 = n2 x t. When the Tdisp counter count source select bit of the FLDC mode register is “0”
and the value of the Toff2 time set register is 180 (B416), Toff2 = 180 x 3.2 (at XIN = 10 MHz) = 576 µs.
Low output period for
blurring prevention
Display output period
•Grayscale display mode is not selected
(Address 035016 bit 5 = “0”)
•Grayscale display mode is selected and set for bright display
(Address 035016 bit 5 = “1” and the corresponding grayscale
display control data = “0”)
Toff1
Tdisp
Low output period for
blurring prevention
Low output period for
dark display
Display output
period
•Grayscale display mode is selected and set for dark display
(Address 035016 bit 5 = “1” and the corresponding grayscale
display control data = “1”)
Toff1
Toff2
Tdisp
Figure KA-11. FLDC Timing
64
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FLD automatic display start
Automatic display starts by setting both the automatic display control bit (bit 0 of address 035016) and the
display start bit (bit 1 of address 035016) to “1”. The RAM content at a location apart from the start address
of the automatic display RAM for each port by (FLD data pointer (address 035816) – 1) is output to each
port. The FLD data pointer (address 035816) counts down in the Tdisp interval. When the count “FF16” is
reached, the pointer is reloaded and starts counting over again. Before setting the display start bit (bit 1 of
address 035016) to “1”, be sure to set the FLD/port switch register, FLD/DIG switch register, FLDC mode
register, Tdisp time set register, Toff1 time set register, Toff2 time set register, and FLD data pointer.
During FLD automatic display, bit 1 of the FLDC mode register (address 035016) always keeps “1”, and
FLD automatic display can be interrupted by writing “0” to bit 1.
Key-scan and interrupt
Either a FLD digit interrupt or FLD blanking interrupt can be selected using the Tscan control bits (bits 2, 3
of address 035016).
The FLD digit interrupt is generated when the Toff1 time in each timing expires (at rising edge of digit
output). Key scanning that makes use of FLD digits can be achieved using each FLD digit interrupt. To use
FLD digit interrupts for key scanning, follow the procedure described below.
(1) Read the port value each time the interrupt occurs.
(2) The key is fixed on the last digit interrupt.
The digit positions output can be determined by reading the FLD data pointer (address 035816).
Repeat synchronous
Tdisp
Toff1
Tn Tn-1 Tn-2
T4
T3
T2
T1
Tn
Tn-1 Tn-2
T4
FLD digit output
FLD digit interrupt generated at the rising edge of digit ( each timing)
Figure KA-12A. Timing using digit interrupt
65
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
The FLD blanking interrupt is generated when the FLD data pointer (address 035816) reaches “FF16”. The FLD automatic
display output is turned off for a duration of 1 x Tdisp, 2 x Tdisp, or 3 x Tdisp depending on post-interrupt settings. During
this time, key scanning that makes use of FLD segments can be achieved.
When a key-scan is performed with the segment during key-scan blanking period Tscan, take the following sequence:
1. Write “0” to bit 0 of the FLDC mode register (address 035016).
2. Set the port corresponding to the segment for key-scan to the output port.
3. Perform the key-scan.
4. After the key-scan is performed, write “1” to bit 0 of FLDC mode register (address 035016).
•Note:
When performing a key-scan according to the above steps 1 to 4, take the following points into consideration.
1. Do not set “0” in bit 1 of the FLDC mode register (address 035016).
2. Do not set “1” in the ports corresponding to digits.
Repeat synchronous
Tdisp
Tn Tn-1 Tn-2
Tscan
T4
T3
T2
T1
Tn Tn-1 Tn-2
FLD digit output
Segment setting by software
FLD blanking interrupt generated at the
falling of edge of the last digit
Figure KA-12B. Timing using FLD blanking interrupt
66
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
P44 to P47 Expansion Function
P44 to P47 are CMOS output-type ports. FLD digit outputs can be increased as many as 16 lines by con-
necting a 4-bit to 16-bit decoder to these ports. P44 to P47 have the function to allow for connection to a 4-
bit to 16-bit decoder.
(1) P44 to P47 Toff invalid Function
This function disables the Toff1 time and Toff2 time and outputs display data for the duration of Tdisp.
(See Figure KA-13.) This can be accomplished by setting the P44 to P47 Toff disable bit (address 035016
bit 2) to “1”.
Unlike the Toff section generate/not generate function, this function disables all display data.
(2) Dimmer signal output Function
This function allows a dimmer signal creation signal to be output from DIMOUT (P97). The dimmer function
can be materialized by controlling the decoder with this signal. (See Figure KA-13.) This function can be
set by writing P97 dimmer output control bit (bit 4 of address 035116) to “1”.
(3) P44 to P47 FLD Output Reverse Bit
P44 to P47 are provided with a function to reverse the polarity of the FLD output. This function is useful in
adjusting the polarity when using an externally installed driver.
The output polarity can be reversed by setting bit 0 of the FLD output control register (address 035116) to
“1” .
•Grayscale display mode is not selected
•Grayscale display mode is selected and
set for bright display
(grayscale display control data = “0”)
FLD output
•Grayscale display mode is selected and
set for dark display
(grayscale display control data = “1”)
•Grayscale display mode is selected and
Toff2 SET/RESET bit is “1”
(grayscale display control data = “1”)
Toff1
Toff2
Tdisp
Output selecting P4
Toff invalid
4 to P47
For dimmer signal
DIMOUT(P97)
Figure KA-13. P4 to P47 FLD Output pulses
67
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Toff section generate/not generate Function
The function is for reduction of useless noises which generated as every switching of ports, because of the
combined capacity of among FLD ports. In case the continuous data output to each FLD ports, the Toff1
section of the continuous parts is not generated. (See Figure KA-15)
If it needs Toff1 section on FLD pulses, set “CMOS ports: section of Toff generate / not generate bit” to “1”
and set “high-breakdown-voltage ports: section of Toff generate / not generate bit” to “1”. High-breakdown-
voltage ports (P5, P6, P3, P2, P1, P0, P4
0 to P43, total 52 pins) generate Toff1 section, by setting “high-
breakdown-voltage ports: section of Toff generate / not generate bit” to “1”
.
The CMOS ports ( P44 to P47, total 4 pins ) generate Toff1 section, by setting “high-breakdown-voltage
ports: section of Toff generate / not generate bit” to “1”.
Tdisp
Toff1
“H” output
“H” output
“L” output
“H” output
“H” output
“L” output
“H” output
“H” output
P1X
P2X
Output waveform when “high-
breakdown-voltage ports: section of Toff
generate/not generate bit”(bit 6 of 0351
1
6
) is “1”.
“H” output
“H” output
“L” output
“H” output
“H” output
P1X
Output waveform when “high-
Section of Toff1 is not generated because of output is same.
“L” output
breakdown-voltage ports: section of Toff
generate/not generate bit”(bit 6 of 035116
is “0”.
)
“H” output
“H” output
P2X
Section of Toff1 is not generated because of output is same.
Fig. KA-15. Toff Section Generated/not generated Function
Toff2 SET/RESET change bit
In gradation display mode, the values set by the Toff2 time set register (TOFF2) are effective. When the
FLD output control register (bit 7 of address 035116 ) in the initial state = “0”, RAM data is output to the FLD
output ports (SET) at the time that is set by TOFF1 and is turned to “0” (RESET) at the time that is set by
TOFF2. When bit 7 = “1”, RAM data is output (SET) at the time that is set by TOFF2 and is turned to “0”
(RESET) when the Tdisp time expires.
68
Mitsubishi microcomputers
M30218 Group
FLD controller
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Digit pulses output Function
P50 to P57 and P60 to P67 allow digit pulses to be output using the FLD/digit switch register. Set the digit
output set register by writing as many consecutive 1s as the timing count from P60. The contents of FLD
automatic display RAM for the ports that have been selected for digit output are disabled, and the pulse
shown in Figure KA-16 is output automatically. In gradation display mode use, Toff2 time becomes effective
for the port which selected digit output. Because the contents of FLD automatic display RAM are disabled,
the segment data can be changed easily even when segment data and digit data coexist at the same
address in the FLD automatic display RAM.
This function is effective in 16-timing normal mode and 16-timing gradation display mode. If a value is set
exceeding the timing count (FLD data pointer reload register's set value + 1) for any port, the output of such
port is “L”.
Tdisp
Toff1
P5
7
P5
P5
P5
6
5
4
P5
P5
P5
P5
3
2
1
0
P67
P66
P65
P64
P63
P6
P6
P6
2
1
0
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Low-order 4bits
of the data pointer
Fig. KA-16. Digit Pulses Output Function
69
Mitsubishi microcomputers
M30218 Group
Timer
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer
There are eight 16-bit timers. These timers can be classified by function into timers A (five) and timers B
(three). All these timers function independently. Figures FB-1 show the block diagram of timers.
Clock prescaler
X
IN
1/32
Reset
f
f
1
8
fC32
X
CIN
1/8
Clock prescaler reset flag
(bit 7 at address 038116) set to “1”
1/4
f
32
f1 f8 f32 fc32
• Timer mode
• One-shot mode
• PWM mode
Timer A0 interrupt
Timer A1 interrupt
Timer A2 interrupt
Timer A3 interrupt
Timer A4 interrupt
Timer A0
Noise
filter
TA0IN
TA3OUT
/
• Event counter mode
• Timer mode
• One-shot mode
• PWM mode
Timer A1
Noise
filter
TA1IN
/
• Event counter mode
TA4OUT
• Timer mode
• One-shot mode
• PWM mode
Timer A2
Noise
filter
TA2IN
/
• Event counter mode
TA0OUT
• Timer mode
• One-shot mode
• PWM mode
Timer A3
Noise
filter
TA3IN
/
• Event counter mode
TA1OUT
• Timer mode
• One-shot mode
• PWM mode
Timer A4
Noise
filter
TA4IN
TA2OUT
/
• Event counter mode
• Timer mode
• Pulse width measuring mode
Timer B0 interrupt
Timer B1 interrupt
Noise
filter
TB0IN
Timer B0
• Event counter mode
• Timer mode
• Pulse width measuring mode
Noise
filter
TB1IN
TB2IN
Timer B1
• Event counter mode
• Timer mode
• Pulse width measuring mode
Timer B2 interrupt
Noise
filter
Timer B2
• Event counter mode
Figure FB-1. Timer block diagram
70
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer A
Figure FB-2 shows the block diagram of timer A. Figures FB-3 to FB-5 show the timer A-related registers.
Except in event counter mode, timers A0 through A4 all have the same function. Use the timer Ai mode
register (i = 0 to 4) 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's over flow.
• 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.
Data bus high-order bits
Clock source
Data bus low-order bits
selection
• Timer
• One shot
• PWM
f
f
f
1
Low-order
8 bits
High-order
8 bits
8
32
• Timer
(gate function)
Reload register (16)
f
C32
• Event counter
Clock selection
Counter (16)
Polarity
selection
Up count/down count
TAiIN
Always down count except
in event counter mode
(i = 0 to 4)
Count start flag
(Address 038016
)
Down count
TAi
Addresses
TAj
TAk
TAiOUT
TB2 overflow
Timer A0 038716 038616 Timer A4 Timer A1 Timer A3
Timer A1 038916 038816 Timer A0 Timer A2 Timer A4
Timer A2 038B16 038A16 Timer A1 Timer A3 Timer A0
Timer A3 038D16 038C16 Timer A2 Timer A4 Timer A1
Timer A4 038F16 038E16 Timer A3 Timer A0 Timer A2
External
trigger
Up/down flag
TAj overflow
(j = i - 1. Note, however, that j = 4 when i = 0)
(Address 038416
)
TAk overflow
(k = i + 1. Note, however, that k = 0 when i = 4)
Pulse output
TAiOUT
(i = 0 to 4)
Toggle flip-flop
Figure FB-2. Block diagram of timer A
Timer Ai mode register
b7 b6 b5 b4 b3 b2
b
b0
Symbol
Address
When reset
0016
TAiMR(i=0 to 4) 039616 to 039A16
R W
Bit symbol
Bit name
Function
b1 b0
TMOD0
Operation mode select
bit
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
TMOD1
MR0
Function varies with each operation mode
MR1
MR2
MR3
TCK0
TCK1
Count source select bit
(Function varies with each operation mode)
Figure FB-3. Timer A-related registers (1)
71
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Ai register (Note)
Symbol
TA0
TA1
TA2
TA3
Address
When reset
(b15)
b7
(b8)
b0b7
b0
038716,038616
038916,038816
038B16,038A16
038D16,038C16
038F16,038E16
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
TA4
Values that can be set
000016 to FFFF
Function
R W
• Timer mode
Counts an internal count source
• Event counter mode
Counts pulses from an external source or timer overflow 000016 to FFFF16
• One-shot timer mode
Counts a one shot width
000016 to FFFF16
• Pulse width modulation mode (16-bit PWM)
Functions as a 16-bit pulse width modulator
000016 to FFFE16
• 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
0016 to FE16
(Both high-order
and low-order
addresses)
Note: Read and write data is in 16-bit units.
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TABSR
Address
038016
When reset
0016
R W
Bit symbol
TA0S
TA1S
TA2S
TA3S
TA4S
TB0S
TB1S
TB2S
Bit name
Function
Timer A0 count start flag
Timer A1 count start flag
Timer A2 count start flag
Timer A3 count start flag
Timer A4 count start flag
Timer B0 count start flag
Timer B1 count start flag
Timer B2 count start flag
0 : Stops counting
1 : Starts counting
Up/down flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UDF
Address
038416
When reset
0016
Bit symbol
TA0UD
TA1UD
TA2UD
TA3UD
TA4UD
TA2P
Bit name
Function
R W
Timer A0 up/down flag
0 : Down count
1 : Up count
Timer A1 up/down flag
Timer A2 up/down flag
This specification becomes valid
when the up/down flag content is
selected for up/down switching
cause
Timer A3 up/down flag
Timer A4 up/down flag
0 : two-phase pulse signal
processing disabled
1 : two-phase pulse signal
processing enabled
Timer A2 two-phase pulse
signal processing select bit
TA3P
TA4P
Timer A3 two-phase pulse
signal processing select bit
When not using the two-phase
pulse signal processing function,
set the select bit to “0”
Timer A4 two-phase pulse
signal processing select bit
Figure FB-4. Timer A-related registers (2)
72
Mitsubishi microcomputers
M30218 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
00X00000
2
R W
Bit symbol
Bit name
Function
Timer A0 one-shot start flag
Timer A1 one-shot start flag
Timer A2 one-shot start flag
Timer A3 one-shot start flag
Timer A4 one-shot start flag
TA0OS
TA1OS
TA2OS
TA3OS
TA4OS
1: Timer start
When read, the value is “0”
Nothing is assigned.
This bit can neither be set nor reset. When read, the content is indeterminate.
b7 b6
TA0TGL
Timer A0 event/trigger
0 0 : Input on TA0IN is selected (Note)
select bit
0 1 : TB2 overflow is selected
1 0 : TA4 overflow is selected
1 1 : TA1 overflow is selected
TA0TGH
Note: Set the corresponding port direction register to “0”.
When TAiIN is selected, TAiOUT assigned on same pin can not be used. (i=0 to 4)
Trigger select register
Symbol
TRGSR
Address
038316
When reset
0016
b7 b6 b5 b4 b3 b2 b1 b0
Bit symbol
TA1TGL
Bit name
Function
R W
b1 b0
Timer A1 event/trigger
select bit
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
TA1TGH
TA2TGL
b3 b2
Timer A2 event/trigger
select bit
0 0 : Input on TA2IN is selected (Note)
0 1 : TB2 overflow is selected
1 0 : TA1 overflow is selected
1 1 : TA3 overflow is selected
TA2TGH
TA3TGL
TA3TGH
b5 b4
Timer A3 event/trigger
select bit
0 0 : Input on TA3IN is selected (Note)
0 1 : TB2 overflow is selected
1 0 : TA2 overflow is selected
1 1 : TA4 overflow is selected
b7 b6
Timer A4 event/trigger
select bit
TA4TGL
TA4TGH
0 0 : Input on TA4IN is selected (Note)
0 1 : TB2 overflow is selected
1 0 : TA3 overflow is selected
1 1 : TA0 overflow is selected
Note: Set the corresponding port direction register to “0”.
When TAiIN is selected, TAiOUT assigned on same pin can not be used. (i=0 to 4)
Clock prescaler reset flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CPSRF
Address
038116
When reset
0XXXXXXX
2
R W
Bit symbol
Bit name
Function
Nothing is assigned.
These bits can neither be set nor reset. When read, their contents are indeterminate.
0 : No effect
1 : Prescaler is reset
CPSR
Clock prescaler reset flag
(When read, the value is “0”)
Figure FB-5. Timer A-related registers (3)
73
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table FB-1.) Figure FB-6 shows
the timer Ai mode register in timer mode.
Table FB-1. Specifications of timer mode
Item
Specification
Count source
Count operation
f1, f8, f32, fC32
• Down count
• When the timer underflows, it reloads the reload register contents before continuing countin
g
Divide ratio
1/(n+1)
n : Set value
Count start condition
Count stop condition
Count start flag is set (= 1)
Count start flag is reset (= 0)
Interrupt request generation timing When the timer underflows
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
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
Select 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
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
0016
TAiMR(i=0 to 4) 039616 to 039A16
0
0 0
Bit symbol
Bit name
Function
R W
b1 b0
TMOD0
TMOD1
MR0
Operation mode
select bit
0 0 : Timer mode
Pulse output function
select bit
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
Gate function select bit
MR1
MR2
0 X (Note 2): Gate function not available
(TAiIN pin is a normal port pin)
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)
MR3
0 (Must always be fixed to “0” in timer mode)
b7 b6
0 0 : f
TCK0
Count source select bit
1
8
0 1 : f
1 0 : f32
1 1 : fC32
TCK1
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 FB-6. Timer Ai mode register in timer mode
74
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(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. Timers A2, A3, and A4 can count a single-phase and a two-phase
external signal. Table FB-2 lists timer specifications when counting a single-phase external signal. Fig-
ure FB-7 shows the timer Ai mode register in event counter mode.
Table FB-3 lists timer specifications when counting a two-phase external signal. Figure FB-8 shows the
timer Ai mode register in event counter mode.
Table FB-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
Divide ratio
•Up count or down count can be selected by external signal or software
•
When the timer overflows or underflows, the reload register's content is reloaded
and the timer starts over again.(Note)
1/ (FFFF16 - n + 1) for up count
1/ (n + 1) for down count
Count start flag is set (= 1)
Count start flag is reset (= 0)
n : Set value
Count start condition
Count stop condition
Interrupt request generation timing The timer overflows or underflows
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Programmable I/O port or count source input
Programmable I/O port, pulse output, or up/down count select input
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)
•Free-run count function
Select 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
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TAiMR(i = 0, 1)
Address
039616, 039716
When reset
0016
0
0 1
R W
Bit symbol
Bit name
Function
TMOD0
TMOD1
MR0
b1 b0
Operation mode select bit
0 1 : Event counter mode (Note 1)
0 : Pulse is not output
Pulse output function
select bit
(TAiOUT pin is a normal port pin)
1 : Pulse is output (Note 2)
(TAiOUT pin is a pulse output pin)
MR1
MR2
Count polarity
select bit (Note 3)
0 : Counts external signal's falling edge
1 : Counts external signal's rising edge
Up/down switching
cause select bit
0 : Up/down flag's content
1 : TAiOUT pin's input signal (Note 4)
MR3
0 (Must always be fixed to “0” in event counter mode)
TCK0
Count operation type select
bit
0 : Reload type
1 : Free-run type
TCK1
Invalid in event counter mode
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 FB-7. Timer Ai mode register in event counter mode
75
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table FB-3. Timer specifications in event counter mode (when processing two-phase pulse signal with timer A2,A3 and A4
Item
Specification
Count source
•Two-phase pulse signals input to TAiIN or TAiOUT 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)
Count operation
Divide ratio
1/ (FFFF16 - n + 1) for up count
1/ (n + 1) for down count
Count start flag is set (= 1)
Count start flag is reset (= 0)
n : Set value
Count start condition
Count stop condition
Interrupt request generation timing Timer overflows or underflows
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Two-phase pulse input
Two-phase pulse input
Count value can be read out by reading timer A2, A3, or A4 register
•When counting stopped
When a value is written to timer A2, A3, or A4 register, it is written to both
reload register and counter
•When counting in progress
When a value is written to timer A2, A3, or A4 register, it is written to only
reload register. (Transferred to counter at next reload time.)
•Normal processing operation
Select function
The timer counts up rising edges or counts down falling edges on the TAiIN
pin when input signal on the TAiOUT pin is “H”
TAiOUT
TAiIN
Up
count
Up
count
Up
Down
Down
count
Down
count
(i=2,3)
count count
•Multiply-by-4 processing operation
If the phase relationship is such that the TAiIN pin goes “H” when the input
signal on the TAiOUT pin is “H”, the timer counts up rising and falling edges
on the TAiOUT and TAiIN pins. If the phase relationship is such that the
TAiIN pin goes “L” when the input signal on the TAiOUT pin is “H”, the timer
counts down rising and falling edges on the TAiOUT and TAiIN pins.
TAiOUT
Count down all edges
Count down all edges
Count up all edges
Count up all edges
TAiIN
(i=3,4)
Note: This does not apply when the free-run function is selected.
76
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Ai mode register
(When not using two-phase pulse signal processing)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
0016
TAiMR(i = 2 to 4) 039816 to 039A16
0
0 1
R W
Bit symbol
Bit name
Function
b1 b0
TMOD0
TMOD1
Operation mode select bit
0 1 : Event counter mode
0 : Pulse is not output
Pulse output function
select bit
MR0
(TAiOUT pin is a normal port pin)
1 : Pulse is output (Note 1)
(TAiOUT pin is a pulse output pin)
Count polarity
select bit (Note 2)
0 : Counts external signal's falling edges
1 : Counts external signal's rising edges
MR1
MR2
0 : Up/down flag's content
1 : TAiOUT pin's input signal (Note 3)
Up/down switching
cause select bit
0 (Must always be “0” in event counter mode)
MR3
TCK0
Count operation type select
bit
0 : Reload type
1 : Free-run type
Two-phase pulse signal
processing operation
select bit (Note 4)(Note 5)
TCK1
0 : Normal processing operation
1 : Multiply-by-4 processing operation
Note 1: The settings of the corresponding port register and port direction register are invalid
Note 2: This bit is valid when only counting an external signal.
Note 3: Set the corresponding port direction register to “0”.
Note 4: This bit is valid for timer A3 mode register.
For timer A2 and A4 mode registers, this bit can be “0 ”or “1”.
Note 5: 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 (addresses 038216 and 038316) to “00”.
Timer Ai mode register
(When using two-phase pulse signal processing)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
0016
0
1 0 0 0 1
TAiMR(i = 2 to 4) 039816 to 039A16
Bit symbol
Bit name
Function
R W
b1 b0
TMOD0
TMOD1
Operation mode select bit
0 1 : Event counter mode
0 (Must always be “0” when using two-phase pulse
signal processing)
MR0
MR1
MR2
MR3
TCK0
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 0 : Reload type
bit
1 : Free-run type
Two-phase pulse
processing operation
select bit (Note 1)(Note 2)
TCK1
0 : Normal processing operation
1 : Multiply-by-4 processing operation
Note 1: This bit is valid for timer A3 mode register.
For timer A2 and A4 mode registers, this bit can be “0” or “1”.
Note 2: 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 (addresses 038216 and 038316) to “00”.
Figure FB-8. Timer Ai mode register in event counter m
77
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) One-shot timer mode
In this mode, the timer operates only once. (See Table FB-4.) When a trigger occurs, the timer starts up and
continues operating for a given period. Figure FB-9 shows the timer Ai mode register in one-shot timer mode.
Table FB-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
Divide ratio
1/n
n : Set value
Count start condition
• 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)
Count stop condition
Interrupt request generation timing The count reaches 000016
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
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)
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
0016
0
1 0
TAiMR(i = 0 to 4) 039616 to 039A16
Bit symbol
Bit name
Function
R W
b1 b0
TMOD0
TMOD1
MR0
Operation mode select bit
1 0 : One-shot timer mode
0 : Pulse is not output
Pulse output function
select bit
(TAiOUT pin is a normal port pin)
1 : Pulse is output (Note 1)
(TAiOUT pin is a pulse output pin)
MR1
MR2
0 : Falling edge of TAiIN pin's input signal (Note 3)
1 : Rising edge of TAiIN pin's input signal (Note 3)
External trigger select
bit (Note 2)
Trigger select bit
0 : One-shot start flag is valid
1 : Selected by event/trigger select
register
MR3
0 (Must always be “0” in one-shot timer mode)
b7 b6
TCK0
Count source select bit
0 0 : f
0 1 : f
1 0 : f32
1
8
TCK1
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 FB-9. Timer Ai mode register in one-shot timer mode
78
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) Pulse width modulation (PWM) mode
In this mode, the timer outputs pulses of a given width in succession. (See Table FB-5.) In this mode, the counter
functions as either a 16-bit pulse width modulator or an 8-bit pulse width modulator. Figure FB-10 shows the
timer Ai mode register in pulse width modulation mode. Figure FB-11 shows the example of how a 16-bit pulse
width modulator operates. Figure FB-12 shows the example of how an 8-bit pulse width modulator operates.
Table FB-5. Timer specifications in pulse width modulation mode
Item
Count source
Specification
f1, f8, f32, fC32
Count operation
•
•
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
16-bit PWM
•High level width
•Cycle time
n / fi n : Set value
(2 -1) / fi fixed
16
8-bit PWM
•High level width n X (m+1) / fi n : values set to timer Ai register’s high-order address
•Cycle time (2 -1) X (m+1) / fi m : values set to timer Ai register’s low-order address
8
Count start condition
•External trigger is input
•The timer overflows
•The count start flag is set (= 1)
Count stop condition
•The count start flag is reset (= 0)
Interrupt request generation timing PWM pulse goes “L”
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
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)
Timer Ai mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
0016
1
1 1
TAiMR(i=0 to 4) 039616 to 039A16
R W
Bit symbol
Bit name
Function
TMOD0
TMOD1
MR0
b1 b0
Operation mode
select bit
1 1 : PWM mode
1 (Must always be fixed to “1” in PWM mode)
External trigger select
MR1
0: Falling edge of TAiIN pin's input signal (Note 2)
bit (Note 1)
1: Rising edge of TAiIN pin's input signal (Note 2)
MR2
Trigger select bit
0: Count start flag is valid
1: Selected by event/trigger select register
0: Functions as a 16-bit pulse width modulator
1: Functions as an 8-bit pulse width modulator
16/8-bit PWM mode
select bit
MR3
b7 b6
TCK0
TCK1
Count source select bit
0 0 : f
0 1 : f
1 0 : f32
1
8
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 FB-10. Timer Ai mode register in pulse width modulation mode
79
Mitsubishi microcomputers
M30218 Group
Timer A
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Condition : Reload register = 000316, when external trigger
(falling edge of TA0IN pin's input signal) is selected.
1 / fi X
(216 –1)
Count source
“H”
“L”
TA0IN pin's
input signal
Trigger is not generated by this signal
1 / f
i
X n
“H”
“L”
PWM pulse output
from TA0OUT pin
“1”
“0”
Timer A0 interrupt
request bit
f
i
: Frequency of count source
(f , f , f32, fC32
Cleared to “0” by software, or when interrupt request is accepted.
1
8
)
Note: n = 000016 to FFFE16
.
Figure FB-11. Example of how a 16-bit pulse width modulator operates
Condition : Reload register's high-order 8 bits = 0216
Reload register's low-order bits 8 = 0216
When external trigger (falling edge of TA0IN pin's input signal) is selected.
8
1 / f
i
X
(m + 1)
X
(2 – 1)
Count source
(Note 1)
“H”
“L”
TA0IN pin's input
signal
1 / fi X (m + 1)
“H”
Underflow signal of
8-bit prescaler (Note 2)
“L”
1 / fi X (m + 1) X n
“H”
“L”
PWM pulse output
from TA0OUT pin
“1”
“0”
Timer A0 interrupt
request bit
f
i
: Frequency of count source
(f , f , f32, fC32
Cleared to “0” by software, or when interrupt request is accepted.
1
8
)
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 FE16; n = 0016 to FE16
.
Figure FB-12. Example of how an 8-bit pulse width modulator operates
80
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer B
Figure TA-1 shows the block diagram of timer B. Figures TA-2 and TA-3 show the timer B-related registers.
Use the timer Bi mode register (i = 0 to 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
Clock source selection
High-order 8 bits
Low-order 8 bits
f
1
• Timer
Reload register (16)
• Pulse period/pulse width measurement
f8
f
32
fc32
Counter (16)
• Event counter
Count start flag
(address 038016
Polarity switching
and edge pulse
TBiIN
(i = 0 to 2)
)
Counter reset circuit
Can be selected in only
event counter mode
TBi
Address
TBj
TBj overflow
(j = i - 1. Note, however,
j = 2 when i = 0)
Timer B0 039116 039016 Timer B2
Timer B1 039316 039216 Timer B0
Timer B2 039516 039416 Timer B1
Figure TA-1. Block diagram of timer B
Timer Bi mode register
Symbol
Address
When reset
b7 b6 b5 b4 b3 b2 b1 b0
TBiMR(i = 0 to 2) 039B16 to 039D16
00XX0000
2
R
W
Bit symbol
TMOD0
Function
Bit name
b1 b0
Operation mode select bit
0 0 : Timer mode
0 1 : Event counter mode
1 0 : Pulse period/pulse width
measurement mode
1 1 : Inhibited
TMOD1
MR0
MR1
MR2
Function varies with each operation mode
(Note 1)
(Note 2)
MR3
TCK0
Count source select bit
(Function varies with each operation mode)
TCK1
Note 1: Timer B0.
Note 2: Timer B1, timer B2.
Figure TA-2. Timer B-related registers (1)
81
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Bi register (Note)
Symbol
TB0
TB1
Address
When reset
(b15)
b7
(b8)
b0 b7
039116, 039016
039316, 039216
039516, 039416
Indeterminate
Indeterminate
Indeterminate
b0
TB2
Values that can be set
000016 to FFFF16
R W
Function
• Timer mode
Counts the timer's period
• Event counter mode
000016 to FFFF16
Counts external pulses input or a timer overflow
• Pulse period / pulse width measurement mode
Measures a pulse period or width
Note: Read and write data in 16-bit units.
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TABSR
Address
038016
When reset
0016
R W
Bit symbol
TA0S
Bit name
Function
Timer A0 count start flag
Timer A1 count start flag
Timer A2 count start flag
Timer A3 count start flag
Timer A4 count start flag
Timer B0 count start flag
Timer B1 count start flag
Timer B2 count start flag
0 : Stops counting
1 : Starts counting
TA1S
TA2S
TA3S
TA4S
TB0S
TB1S
TB2S
Clock prescaler reset flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CPSRF
Address
038116
When reset
0XXXXXXX
2
Bit symbol
R W
Bit name
Function
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
0 : No effect
CPSR
Clock prescaler reset flag
1 : Prescaler is reset
(When read, the value is “0”)
Figure TA-3. Timer B-related registers (2)
82
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table TA-1.) Figure TA-4
shows the timer Bi mode register in timer mode.
Table TA-1. Timer specifications in timer mode
Item
Specification
Count source
Count operation
f1, f8, f32, fC32
•Counts down
•When the timer underflows, the reload register's content is reloaded and the
timer starts over again.
Divide ratio
1/(n+1) n : Set value
Count start condition
Count stop condition
Count start flag is set (= 1)
Count start flag is reset (= 0)
Interrupt request generation timing The timer underflows
TBiIN pin function
Read from timer
Write to timer
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)
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
00XX0000
0
0
TBiMR(i=0 to 2) 039B16 to 039D16
2
Bit symbol
R
W
Bit name
Function
0 0 : Timer mode
b1 b0
TMOD0
TMOD1
MR0
Operation mode select bit
Invalid in timer mode
Can be “0” or “1”
MR1
MR2
MR3
0 (Fixed to “0” in timer mode ; i = 0)
(Note 1)
(Note 2)
Nothing is assigned (i = 1,2). In an attempt to write to this bit, write
“0”. The value, if read, turns out to be indeterminate.
Invalid in timer mode.
In an attempt to write to these bits, write “0”. The value, if read in
timer mode, turns out to be indeterminate.
b7 b6
Count source select bit
TCK0
TCK1
0 0 : f
0 1 : f
1 0 : f32
1
8
1 1 : fC32
Note 1: Timer B0.
Note 2: Timer B1, timer B2.
Figure TA-4. Timer Bi mode register in timer mode
83
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) Event counter mode
In this mode, the timer counts an external signal or an internal timer's overflow. (See Table TA-2.) Figure
TA-5 shows the timer Bi mode register in event counter mode.
Table TA-2. Timer specifications in event counter mode
Item
Specification
Count source
•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
•Counts down
Count operation
•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 stop condition
Count start flag is set (= 1)
Count start flag is reset (= 0)
I
nterrupt 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)
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
00XX00002
TBiMR(i=0 to 2) 039B16 to 039D16
0
1
R
W
Bit symbol
Bit name
Function
b1 b0
TMOD0
TMOD1
Operation mode
select bit
0 1 : Event counter mode
b3 b2
MR0
Count polarity select
bit (Note 1)
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
MR1
1 1 : Inhibited
0 (Fixed to “0” in event counter mode; i = 0)
MR2
MR3
(Note 2)
(Note 3)
Nothing is assigned (i = 1, 2).
In an attempt to write to this bit, write “0”. The value, if read,
turns out to be indeterminate.
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”.
TCK0
TCK1
0: Input from TBiIN pin (Note 4)
1: TBj overflow
Event clock select
(j = i-1; however, j = 2 when i = 0)
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: Timer B0.
Note 3: Timer B1, timer B2.
Note 4: Set the corresponding port direction register to “0”.
Figure TA-5. Timer Bi mode register in event counter mode
84
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(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 TA-3.)
Figure TA-6 shows the timer Bi mode register in pulse period/pulse width measurement mode. Figure
TA-7 shows the operation timing when measuring a pulse period. Figure TA-8 shows the operation
timing when measuring a pulse width.
Table TA-3. Timer specifications in pulse period/pulse width measurement mode
Item
Count source
Count operation
Specification
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 flag is set (= 1)
Count start condition
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”. The timer Bi overflow flag changes to “0” when the count start
flag is “1” and a value is written to the timer Bi mode register.)
TBiIN pin function
Read from timer
Measurement pulse input
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.
Timer Bi mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
When reset
00XX0000
1
0
TBiMR (i=0 to 2) 039B16 to 039D16
2
R
W
Bit symbol
Bit name
Function
b1 b0
TMOD0
TMOD1
Operation mode
select bit
1 0 : Pulse period / pulse width measurement mode
b3 b2
MR0
MR1
Measurement mode
select bit
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 : Inhibited
MR2
0 (Fixed to “0” in pulse period/pulse width measurement mode; i = 0)
(Note 2)
(Note 3)
Nothing is assigned (i = 1, 2).
In an attempt to write to this bit, write “0”. The value, if read in event counter
mode, turns out to be indeterminate.
Timer Bi overflow
flag ( Note 1)
0 : Timer did not overflow
1 : Timer has overflowed
MR3
TCK0
TCK1
b7 b6
Count source
select bit
0 0 : f
0 1 : f
1
8
1 0 : f32
1 1 : fC32
Note 1: The timer Bi overflow flag changes to “0” when the count start flag is “1” and a value is written to the
timer Bi mode register. This flag cannot be set to “1” by software.
Note 2: Timer B0.
Note 3: Timer B1, timer B2.
Figure TA-6. Timer Bi mode register in pulse period/pulse width measurement mode
85
Mitsubishi microcomputers
M30218 Group
Timer B
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Measurement of puls time interval from falling edge to falling edge
Count source
“H”
“L”
Measurement pulse
Transfer
Transfer
(indeterminate value)
(measured value)
Reload register counter
transfer timing
(Note 2)
(Note 1)
(Note 1)
Timing when counter
reaches “000016
”
“1”
“0”
Count start
flag
“1”
“0”
Timer Bi interrupt
request bit
Cleared to “0” by software, or when interrupt request is accepted.
“1”
“0”
Timer Bi overflow
flag
Note 1: Counter is initialized at completion of measurement.
Note 2: Timer has overflowed.
Figure TA-7. Operation timing when measuring a pulse period
Count source
“H”
Measurement pulse
“L”
Transfer (indeterminate value) Transfer (measured value)
Reload register
transfer timing
counter
(Note 1)
(Note 1)
(Note 1) (Note 1)
(Note 2)
Timing when counter
reaches 000016
“
”
“1”
“0”
Count start
flag
“1”
“0”
Timer Bi interrupt
request bit
Cleared to “0” by software, or when interrupt request is accepted.
“1”
“0”
Timer Bi overflow flag
Note 1: Counter is initialized at completion of measurement.
Note 2: Timer has overflowed.
Figure TA-8. Operation timing when measuring a pulse width
86
Mitsubishi microcomputers
M30218 Group
Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O
Serial I/O is configured as two channels: UART0 and UART1.
UART0 and UART1 each have an exclusive timer to generate a transfer clock, so they operate independently of each other.
Figure GA-1 shows the block diagram of UART0 and UART1. Figures GA-2 shows the block diagram of the transmit/receive unit.
UARTi (i=0, 1) 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 and 03A816) determine whether UARTi is used as a clock synchronous serial I/O or as a UART.
Although a few function are different, UART0 and UART1 have almost same functions.
Figures GA-3 through GA-5 show the registers related to UARTi.
(UART0)
TxD
0
RxD
0
UART reception
Receive cl
Transmit/
1/16
Reception control
circuit
Clock source selection
receive
unit
Clock synchronous type
Bit rate generator
f
f
1
8
Internal
(address 03A116
)
UART transmission
1/16
Transmit
clock
1 / (m+1)
f32
Transmission
control circuit
Clock synchronous type
External
Clock synchronous type
(when internal clock is selected)
1/2
Clock synchronous type
(when external clock is
selected)
Clock synchronous type
(when internal clock is selected)
Polarity
reversing
circuit
CLK
0
CTS/RTS disabled
CTS/RTS selected
RTS0
CTS0
CTS0 / RTS0
Vcc
CTS/RTS disabled
(UART1)
RxD
1
TxD
1
UART reception
1/16
Receive
clock
Reception control
circuit
Transmit/
receive
unit
Clock source selection
Clock synchronous type
Bit rate generator
f
1
Internal
(address 03A916
)
f8
UART transmission
Transmit
clock
1 / (n+1)
f32
1/16
Transmission
control circuit
Clock synchronous type
External
Clock synchronous type
(when internal clock is selected)
1/2
Clock synchronous type
(when external clock is selected)
Clock synchronous type
(when internal clock is selected)
Polarity
reversing
circuit
CLK
1
Clock output pin
select switch
CTS/RTS disabled
RTS
1
CTS
1
/ RTS1
CLKS
1
V
CC
CTS/RTS disabled
CTS
1
m: Values set to UART0 bit rate generator (U0BRG)
n : Values set to UART1 bit rate generator (U1BRG)
Figure GA-1. Block diagram of UARTi (i = 0, 1)
87
Mitsubishi microcomputers
M30218 Group
Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock
synchronous type
UART (7 bits)
UART (8 bits)
Clock
synchronous
type
UARTi receive register
UART (7
bits)
PAR
1SP
2SP
disabled
PAR
RxDi
SP
SP
PAR
enabled
UART
UART (9 bits)
Clock
synchronous type
UART (8 bits)
UART (9 bits)
UARTi receive
buffer register
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
D8
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
UARTi transmit
buffer register
D7
D6
D5
D4
D3
D2
D1
D0
D8
Address 03A216
Address 03A316
Address 03AA16
Address 03AB16
UART (8 bits)
UART (9 bits)
Clock
UART (9 bits)
synchronouss
type
PAR
enabled
UART
2SP
1SP
PAR
SP
SP
TxDi
PAR
disabled
Clock
synchronous
type
UART (7 bits)
UARTi transmit register
SP: Stop bit
UART (7 bits)
UART (8 bits)
"0"
Clock synchronous
type
PAR: Parity bit
Figure GA-2. Block diagram of transmit/receive unit
88
Mitsubishi microcomputers
M30218 Group
Serial I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit buffer register
(b15)
b7
(b8)
b0 b7
b0
Symbol
U0TB
U1TB
Address
03A316, 03A216
03AB16, 03AA16
When reset
Indeterminate
Indeterminate
Function
R W
Transmission data
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be indeterminate.
UARTi receive buffer register
(b15)
b7
(b8)
b0 b7
Symbol
U0RB
U1RB
Address
03A716, 03A616
03AF16, 03AE16
When reset
Indeterminate
Indeterminate
b0
Function
(During clock synchronous
serial I/O mode)
Bit
symbol
Function
(During UART mode)
Bit name
R W
Reception data
Reception data
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
OER
Overrun error flag (Note) 0 : No overrun error
1 : Overrun error found
0 : No overrun error
1 : Overrun error found
FER
PER
Framing error flag (Note) Invalid
0 : No framing error
1 : Framing error found
Parity error flag (Note)
Invalid
Invalid
0 : No parity error
1 : Parity error found
SUM Error sum flag (Note)
0 : No error
1 : Error found
Note: Bits 15 through 12 are set to “0” when the serial I/O mode select bit (bits 2 to 0 at addresses
03A016 and 03A816) 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 and 03AE16) is read out.
UARTi bit rate generator
b7
b0
Symbol
U0BRG
U1BRG
Address
03A116
03A916
When reset
Indeterminate
Indeterminate
Function
Values that can be set
0016 to FF16
R W
Assuming that set value = n, BRGi divides the count
source by (n + 1)
Figure GA-3. Serial I/O-related registers (1)
89
Mitsubishi microcomputers
M30218 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
Function
(During clock synchronous
serial I/O mode)
Bit
symbol
Function
(During UART mode)
Bit name
R W
b2 b1 b0
SMD0
Must be fixed to 001
Serial I/O mode select bit
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 : Inhibited
b2 b1 b0
0 0 0 : Serial I/O invalid
0 1 0 : Inhibited
0 1 1 : Inhibited
SMD1
SMD2
1 1 1 : Inhibited
0 1 1 : Inhibited
1 1 1 : Inhibited
Internal/external clock
select bit
0 : Internal clock
1 : External clock
0 : Internal clock
1 : External clock
CKDIR
STPS
0 : One stop bit
1 : Two stop bits
Stop bit length select bit
Invalid
Valid when bit 6 = “1”
0 : Odd parity
PRY
Odd/even parity select bit Invalid
1 : Even parity
0 : Parity disabled
1 : Parity enabled
PRYE
SLEP
Parity enable bit
Sleep select bit
Invalid
0 : Sleep mode deselected
1 : Sleep mode selected
Must always be “0”
UARTi transmit/receive control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiC0 (i=0,1)
Address
03A416, 03AC16
When reset
0816
Function
(During clock synchronous
serial I/O mode)
Bit
Function
(During UART mode)
R W
Bit name
symbol
CLK0
b1 b0
b1 b0
BRG count source
select bit
0 0 : f
0 1 : f
1
8
is selected
is selected
0 0 : f
0 1 : f
1
8
is selected
is selected
1 0 : f32 is selected
1 1 : Inhibited
1 0 : f32 is selected
1 1 : Inhibited
CLK1
CRS
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
CTS/RTS function
select bit
0 : Data present in transmit
register (during transmission)
1 : No data present in transmit
register
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit
register (transmission completed)
TXEPT Transmit register empty
flag
(transmission completed)
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P47 and P77 function as
CRD
NCH
CTS/RTS disable bit
Data output select bit
(P4
7
and P7
7
function as
programmable I/O port)
programmable I/O port)
0 : TXDi pin is CMOS output
1 : TXDi pin is N-channel
open-drain output
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
Must always be “0”
CKPOL CLK polarity select bit
1 : Transmit data is output at
rising edge of transfer clock
and receive data is input at
falling edge
0 : LSB first
1 : MSB first
UFORM Transfer format select bit
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.
Figure GA-4. Serial I/O-related registers (2)
90
Mitsubishi microcomputers
M30218 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
,
Function
(During clock synchronous serial
I/O mode)
Function
(During UART mode)
Bit
symbol
Bit name
R W
TE
Transmit enable bit
0 : Transmission disabled
1 : Transmission enabled
0 : Transmission disabled
1 : Transmission enabled
Transmit buffer empty
flag
0 : Data present in
0 : Data present in
TI
transmit buffer register
1 : No data present in
transmit buffer register
transmit buffer register
1 : No data present in
transmit buffer register
RE
RI
Receive enable bit
0 : Reception disabled
1 : Reception enabled
0 : Reception disabled
1 : Reception enabled
0 : No data present in
receive buffer register
1 : Data present in
0 : No data present in
receive buffer register
1 : Data present in
Receive complete flag
receive buffer register
receive buffer register
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be “0”.
UART transmit/receive control register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UCON
Address
03B016
When reset
X0000000
0
2
Function
(During clock synchronous serial
I/O mode)
Function
(During UART mode)
Bit
symbol
Bit name
UART0 transmit
R W
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed
(TXEPT = 1)
U0IRS
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed
(TXEPT = 1)
interrupt cause select bit
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed
(TXEPT = 1)
UART1 transmit
interrupt cause select bit
U1IRS
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed
(TXEPT = 1)
UART0 continuous receive
mode enable bit
0 : Continuous receive
mode disabled
U0RRM
Invalid
1 : Continuous receive
mode enable
U1RRM
Invalid
UART1 continuous receive
mode enable bit
0 : Continuous receive
mode disabled
1 : Continuous receive
mode enabled
CLKMD0 CLK/CLKS select bit 0
Valid when bit 5 = “1”
Invalid
0 : Clock output to CLK1
1 : Clock output to CLKS1
CLK/CLKS select bit 1
(Note)
CLKMD1
0 : Normal mode
Must always be “0”
(CLK output is CLK1 only)
1 : Transfer clock output
from multiple pins
function selected
Reserved bit
Must always be “0”
Must always be “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 requirement must be met:
• UART1 internal/external clock select bit (bit 3 at address 03A816) = “0”.
Figure GA-5. Serial I/O-related registers (3)
91
Mitsubishi microcomputers
M30218 Group
Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Clock synchronous serial I/O mode
The clock synchronous serial I/O mode uses a transfer clock to transmit and receive data. Table GA-1
lists the specifications of the clock synchronous serial I/O mode. Figure GA-6 shows the UARTi transmit/
receive mode register.
Table GA-1. Specifications of clock synchronous serial I/O mode
Specification
Item
• Transfer data length: 8 bits
Transfer data format
Transfer clock
•
•
When internal clock is selected (bit 3 at address 03A016, 03A816 = “0”) : fi/ 2(n+1) (Note 1) fi = f1, f8, f32
When external clock is selected (bit 3 at address 03A016, 03A816 =“1”) : Input from CLKi pin (Note 2)
_______
________
_______ ________
• CTS function/ RTS function/ CTS,RTS function chosen to be invalid
• To start transmission, the following requirements must be met:
Transmission/reception control
Transmission start condi-
_
Transmit enable bit (bit 0 at address 03A516, 03AD16) = “1”
tion
_
Transmit buffer empty flag (bit 1_a__t__a__ddresses 03A516, 03AD16) = “0”
_______
_
When CTS function is 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 address 03A416, 03AC16) = “0”: CLKi input level = “H”
CLKi polarity select bit (bit 6 at address 03A416, 03AC16) = “1”: CLKi input level = “L”
_
_
• To start reception, the following requirements must be met:
_
Receive enable bit (bit 2 at address 03A516, 03AD16) = “1”
Transmit enable bit (bit 0 at address 03A516, 03AD16) = “1”
Transmit buffer empty flag (bit 1 at address 03A516, 03AD16) = “0”
Reception start condition
_
_
•
Furthermore, if external clock is selected, the following requirements must also be met:
CLKi polarity select bit (bit 6 at address 03A416, 03AC16) = “0”: CLKi input level = “H”
CLKi polarity select bit (bit 6 at address 03A416, 03AC16) = “1”: CLKi input level = “L”
_
_
• When transmitting
_
Transmit interrupt cause select bit (bits 0,1 at address 03B016) = “0”:
Interrupts requested when data transfer from UARTi transfer buffer register to
UARTi transmit register is completed
Interrupt request
generation timing
_
Transmit interrupt cause select bit (bits 0,1 at address 03B016) = “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
• Overrun error (Note 3)
This error occurs when the next data is ready before contents of UARTi re-
ceive buffer register are read out
• CLK polarity selection
Whether transmit data is output/input at the rising edge or falling edge of the
transfer clock can be selected
Error detection
Select function
• 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 transfer clock can be set 2 pins, and can be selected to output from
which pin.
Note 1: “n” denotes the value 0016 to FF16 that is set to the UART bit rate generator.
Note 2: Maximum 5 Mbps.
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 is not set to “1”.
92
Mitsubishi microcomputers
M30218 Group
Clock synchronous serial I/O mode
UARTi transmit/receive mode register
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiMR(i=0,1)
Address
03A016, 03A816
When reset
0016
0
0 0 1
Bit symbol
Bit name
Function
R W
b2 b1 b0
SMD0
SMD1
SMD2
CKDIR
Serial I/O mode select bit
0 0 1 : Clock synchronous serial
I/O mode
Internal/external clock
select bit
0 : Internal clock
1 : External clock
STPS
PRY
Invalid in clock synchronous serial I/O mode
PRYE
SLEP
0 (Must always be "0" in clock synchronous serial I/O mode)
Figure GA-6. UARTi transmit/receive mode register in clock synchronous serial I/O mode (i=0,1)
Table GA-2 lists the functions of the input/output pins during clock synchronous serial I/O mode. Note that
for a period from when the UARTi operation mode is selected to when transfer starts, the TxDi pin outputs
a “H”. (If the N-channel open-drain is selected, this pin is in floating state.)
Table GA-2. Input/output pin functions in clock synchronous serial I/O mode (i=0,1)
Pin name
TxDi
(P4 , P7
RxDi
(P4 , P7
CLKi
(P4 , P7
Function
Method of selection
Serial data output
(Outputs dummy data when performing reception only)
4
4)
Port P45, P75 direction register (bits 5 at address 03EA16 and 03EF16)= “0”
(Can be used as an input port when performing transmission only)
Serial data input
5
5
)
)
Transfer clock output
Transfer clock input
Internal/external clock select bit (bit 3 at address 03A016, 03A816) = “0”
6
6
Internal/external clock select bit (bit 3 at address 03A016, 03A816) = “1”
Port P46, P76 direction register (bits 6 at address 03EA16 and 03EF16) = “0”
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) =“0”
CTS/RTS function select bit (bit 2 at address 03A416, 03AC16) = “0”
CTS input
CTSi/RTSi
(P4 , P7
7
7)
Port P47, P77 direction register (bits 7 address 03EA16 and 03EF16) = “0”
RTS output
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) = “0”
CTS/RTS function select bit (bit 2 at address 03A416, 03AC16) = “1”
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) = “1”
Programmable I/O port
93
Mitsubishi microcomputers
M30218 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”
Transmit enable
bit (TE)
“0”
“1”
“0”
“H”
Data is set in UARTi transmit buffer register
Transmit buffer
empty flag (Tl)
Transferred from UARTi transmit buffer register to UARTi transmit register
CTSi
CLKi
T
CLK
“L”
Stopped pulsing because CTS = “H”
Stopped pulsing because transfer enable bit = “0”
TxDi
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
register empty
flag (TXEPT)
“1”
“0”
“1”
“0”
Transmit interrupt
request bit (IR)
Cleared to “0” by software, or when an interrupt request is accepted.
Tc = TCLK = 2(n + 1) / fi
Shown in ( ) are bit symbols.
The above timing applies to the following settings:
• Internal clock is selected.
fi: frequency of BRGi's count source (f
1, f8, f32)
n: value set to BRGi
• CTS function is selected.
• CLK polarity select bit = “0”.
• Transmit interrupt cause select bit = “0”.
• Example of receive timing (when external clock is selected)
“1”
Receive enable
bit (RE)
“0”
“1”
“0”
Transmit enable
bit (TE)
Dummy data is set in UARTi transmit buffer register
“1”
“0”
“H”
Transmit buffer
empty flag (Tl)
Transferred from UARTi transmit buffer register to UARTi transmit register
RTSi
CLKi
RxDi
“L”
1 / fEXT
Receive data is taken in
D0
D1
D2
D3
D
4
D5
D6
D0
D1
D2
D3
D4
D5
D7
Transferred from UARTi receive register
to UARTi receive buffer register
Read out from UARTi receive buffer register
“1”
“0”
Receive complete
flag (Rl)
“1”
“0”
Receive interrupt
request bit (IR)
Cleared to “0” by software, or when an interrupt request is accepted.
f
EXT: frequency of external clock
Shown in ( ) are bit symbols.
The above timing applies to the following settings.
• External clock is selected.
Meet the following conditions when the CLK input before
data reception = “H”
• Transmit enable bit
• Receive enable bit
“1”
“1”
• RTS function is selected.
• CLK polarity select bit = “0”.
• Dummy data write to UARTi transmit buffer register
Figure GA-7. Typical transmit/receive timings in clock synchronous serial I/O mode
94
Mitsubishi microcomputers
M30218 Group
Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(a) Polarity select function
As shown in Figure GA-8, the CLK polarity select bit (bit 6 at addresses 03A416, 03AC16) allows
selection of the polarity of the transfer clock.
• When CLK polarity select bit = “0”
CLK
i
Note 1: The CLKi pin level when not
transferring data is “H”.
D0
T
X
D
i
D
1
D
2
D
3
D
4
4
D
5
D
6
D7
D
1
D
2
D
3
D
D
5
D
6
D7
D0
RXDi
• When CLK polarity select bit = “1”
CLK
i
Note 2: The CLKi pin level when not
transferring data is “L”.
D
0
0
D
1
D
2
D
3
D
4
4
D
5
D
6
D7
TXDi
D
1
D
2
D
3
D
D
5
D
6
D7
D
RXDi
Figure GA-8. Polarity of transfer clock
(b) LSB first/MSB first select function
As shown in Figure GA-9, when the transfer format select bit (bit 7 at addresses 03A416, 03AC16) =
“0”, the transfer format is “LSB first”; when the bit = “1”, the transfer format is “MSB first”.
• When transfer format select bit = “0”
CLK
i
D0
D
1
D
2
D
3
3
D
4
D
5
5
D
6
6
D
7
7
TXDi
LSB first
D
1
D
2
D
D4
D
D
D
R
XD
i
D0
• When transfer format select bit = “1”
CLK
i
D
6
D
5
D
4
D
3
3
D
2
D
1
D0
D
7
7
TXDi
MSB first
D
6
D
5
D
4
D
D
2
D
1
D0
D
RXDi
Note: This applies when the CLK polarity select bit = “0”.
Figure GA-9. Transfer format
95
Mitsubishi microcomputers
M30218 Group
Clock synchronous serial I/O mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(c) Transfer clock output from multiple pins function
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 GA-10.)
The multiple pins function is valid only when the internal clock is selected for UART1. Note that when
_______ _______
this function is selected, CTS/RTS function of UART1 cannot be used.
Microcomputer
TXD1 (P74)
CLKS
1
1
(P7
(P7
7
)
CLK
6)
IN
IN
CLK
CLK
Note: This applies when the internal clock is selected and transmission is
performed only in clock synchronous serial I/O mode.
Figure GA-10. 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) 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.
96
Mitsubishi microcomputers
M30218 Group
Clock asynchronous serial I/O (UART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) Clock asynchronous serial I/O (UART) mode
The UART allows transmitting and receiving data after setting the desired transfer rate and transfer data
format. Tables GA-3 lists the specifications of the UART mode. Figure GA-11 shows the UARTi transmit/
receive mode register.
Table GA-3. Specifications of clock synchronous serial I/O mode
Item
Specification
•Character bit (transfer data): 7 bits, 8 bits or 9 bits as selected
•Start bit: 1 bit
Transfer data format
•Parity bit: Odd, even or nothing as selected
•Stop bit: 1 bit or 2 bits as selected
Transfer clock
•When internal clock is selected (bit 3 at addresses 03A016, 03A816 = “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)
_______
_______
_______ _______
Transmission/reception control •CTS function/RTS function/CTS, RTS function chosen to be invalid
Transmission start condition •To start transmission, the following requirements must be met:
- Transmit enable bit (bit 0 at addresses 03A516, 03AD16) = “1”
- Transmit buffer empty flag (bit 1_a__t__a__ddresses 03A516, 03AD16) = “0”
_______
- When CTS function is 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) = “1”
- Start bit detection
Interrupt request
generation timing
•When transmitting
- Transmit interrupt cause select bits (bits 0,1 at address 03B016) = “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) = “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
select function
•Sleep mode selection
This mode is used to transfer data to and from one of multiple slave microcomputers
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 is not set to “1”.
97
Mitsubishi microcomputers
M30218 Group
Clock asynchronous serial I/O (UART) mode
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
R W
Bit symbol
SMD0
Bit name
Function
b2 b1 b0
Serial I/O mode select bit
1 0 0 : Transfer data 7 bits long
1 0 1 : Transfer data 8 bits long
1 1 0 : Transfer data 9 bits long
SMD1
SMD2
CKDIR
Internal/external clock
select bit
Stop bit length select bit
0 : Internal clock
1 : External clock
0 : One stop bit
1 : Two stop bits
STPS
PRY
Odd/even parity select bit Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
PRYE
SLEP
Parity enable bit
Sleep select bit
0 : Parity disabled
1 : Parity enabled
0 : Sleep mode deselected
1 : Sleep mode selected
Figure GA-11. UARTi transmit/receive mode register in UART mode
Table GA-4 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 a “H”. (If the N-
channel open-drain is selected, this pin is in floating state.)
Table GA-4. Input/output pin functions in UART mode (i=0,1)
Pin name
Function
Method of selection
Serial data output
(Outputs dummy data when performing reception only)
TxDi
(P44, P74)
RxDi
(P45, P75)
Serial data input
Port P45, P75 direction register (bits 5 at address 03EA16 and 03EF16)= “0”
(Can be used as an input port when performing transmission only)
Internal/external clock select bit (bit 3 at address 03A016, 03A816) = “0”
Programmable I/O port
Transfer clock input
CLKi
(P46, P76)
Internal/external clock select bit (bit 3 at address 03A016, 03A816) = “1”
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) =“0”
CTS/RTS function select bit (bit 2 at address 03A416, 03AC16) = “0”
Port P47, P77 direction register (bits 7 at address 03EA16 and 03EF16) = “0”
CTS input
CTSi/RTSi
(P47, P77)
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) = “0”
RTS output
CTS/RTS function select bit (bit 2 at address 03A416, 03AC16) = “1”
Programmable I/O port
CTS/RTS disable bit (bit 4 at address 03A416, 03AC16) = “1”
98
Mitsubishi microcomputers
M30218 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
“1”
Transmit enablee
bit(TE)
“0”
“1”
“0”
Data is set in UARTi transmit buffer register.
Transmit buffer
empty flag(TI)
Transferred from UARTi transmit buffer register to UARTi transmit register
“H”
“L”
CTSi
Stopped pulsing because transmit enable bit = “0”
Start
bit
Parity Stop
bit bit
TxDi
ST
D0
D1
ST
D0
D1
D2
D3
D4
D5
D7
P
ST
D0
D1
D2
D3
D4
D5
D7
P
D6
SP
D6
SP
“1”
“0”
Transmit register
empty flag (TXEPT)
“1”
“0”
Transmit interrupt
request bit (IR)
Cleared to “0” by software, or when an interrupt request is accepted.
Shown in ( ) are bit symbols.
Tc = 16 (n + 1) / fi or 16 (n + 1) / fEXT
fi : frequency of BRGi's count source (f
The above timing applies to the following settings :
• Parity is enabled.
1, f8, f32)
f
EXT : frequency of BRGi's count source (external clock)
• One stop bit.
n : value set to BRGi
• CTS function is selected.
• Transmit interrupt cause select bit = “1”.
• Example of transmit timing when transfer data is 9 bits long (parity disabled, two stop bits)
Tc
Transfer clock
“1”
Transmit enable
bit(TE)
Data is set in UARTi transmit buffer register
“0”
“1”
Transmit buffer
empty flag(TI)
“0”
Transferred from UARTi transmit buffer register to UARTi transmit register
Stop Stop
Start
bit
bit
bit
TxDi
ST
ST
D0
D1
D2
D3
D4
D7
D8
ST
D0
D1
D2
D3
D4
D7
D8
SPSP
D0
D1
D5
D6
SPSP
D5
D6
“1”
“0”
Transmit register
empty flag (TXEPT)
“1”
“0”
Transmit interrupt
request bit (IR)
Cleared to “0” by software, or when an interrupt request is accepted.
Tc = 16 (n + 1) / fi or 16 (n + 1) / fEXT
Shown in ( ) are bit symbols.
The above timing applies to the following settings :
• Parity is disabled.
• Two stop bits.
fi : frequency of BRGi's count source (f
EXT : frequency of BRGi's count source (external clock)
n : value set to BRGi
1, f8, f32)
f
• CTS function is disabled.
• Transmit interrupt causes select bit = “0”.
Figure GA-12. Typical transmit timings in UART mode
99
Mitsubishi microcomputers
M30218 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's count
source
“1”
“0”
Receive
enable bit
Stop bit
Start bit
Sampled “L”
D
7
D1
RxDi
D0
Receive data taken in
Transfer clock
Reception triggered when
transfer clock is genelated by
falling edge of start bit
Transferred from UARTi receive register to
UARTi receive buffer register
“1”
Receive
complete flag
“0”
“H”
“L”
RTSi
Receive interrupt
request bit
“1”
“0”
Cleared to “0” by software, or when an interrupt request is accepted.
The above timing applies to the following settings :
• Parity is disabled.
• One stop bit.
• RTS function is selected.
Figure GA-13. 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”.
100
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O2
Serial I/O2 is used as the clock synchronous serial I/O and has an ordinary mode and an automatic transfer
mode. In the automatic transfer mode, serial transfer is performed through the serial I/O automatic transfer
RAM which has up to 256 bytes (addresses 0040016 to 004FF16).
The SRDY2, SBUSY2 and SSTB2 pins each have a handshake I/O signal function and can select either “H”
active or “L” active for active logic.
Table GA-1. Specifications of clock synchronous serial I/O2
Item
Serial mode
Specification
• 8-bit serial I/O mode (non-automatic transfer)
• Automatic transfer serial I/O mode
Transfer data format
• Transfer data length: 8 bits
• Full duplex mode / transmit-only mode selected by bit 5 at address 034216
Transfer clock
Transfer rate
•
•
When internal clock is selected (bit 2 at address 034216 = “0”) : selected by bits 5 to 7 at address 034816
When external clock is selected (bit 2 at address 034216 = “1”) : Input from SCLK21 pin, SCLK22 pin(Note 2)
• When internal clock is selected : f(XIN)/4, f(XIN)/8, f(XIN)/16, f(XIN)/32, f(XIN)/64, f(XIN)/128, f(XIN)/256
• When external clock is selected : input cycle 0.95 µs or less
Transmission/reception control
Transmission /
reception start condition
• SSTB2 output / SBUSY2 input or output / SRDY2 input or output chosen
• To start transmission / reception, the following requirements must be met:
_
Serial I/O initialization bit (bit 4 at address 034216) = “1”
_
When _S__B__U__S__Y__2_ input, or SRDY2 input is selected : selected input level = “H”
_________
_
When SBUSY2 input, or SRDY2 input is selected : selected input level = “L”
• Furthermore, if external clock is selected, the following requirements must
also be met:
_
Input level of SCLK21 or SCLK22 = “H”
Transmission and
reception stop condition
Interrupt request
• To stop transmission and reception, set serial I/O initialization bit (bit 4 at
address 034216) to “0” regardless internal clock and external clock.
• 8-bit serial I/O mode : Interrupts requested when 8-bit data transfer is com-
pleted
generation timing
• Automatic transfer serial I/O mode :Interrupts requested when last receive
data transfer to Automatic transfer RAM
• SOUT2 P-channel output disable function
CMOS output or N-channel open-drain output can be selected
• LSB first/MSB first selection
Select function
Whether transmission/reception begins with bit 0 or bit 7 can be selected
• Serial I/O2 clock pin select bit
Serial clock input/output can be selected; SCLK21 or SCLK22
• SBUSY output, SSTB2 output select function (only automatic transfer serial
mode)
SBUSY output, SSTB2 output can be selected; 1-byte data transfer unit or all
data transfer unit
• SOUT2 pin control bit
Either output active or high-impedance can be selected as a SOUT2 pin state at
serial non-transfer .
Note 1: It is necessary to set the serial I/O clock pin select bit ( bit 7 at address 034216)
101
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Main address
bus
Local address
bus
Main
data bus
Local
data bus
Serial I/O automatic
transfer RAM
(0040016—004FF16
)
Serial I/O2
automatic transfer
data pointer
Address decoder
Serial I/O2
automatic transfer
controller
Serial I/O2
control register 3
1/4
1/8
XIN
Port latch
“0”
1/16
1/32
1/64
1/128
1/256
(SSTB2 pin control bit)
SSTB2
“1”
Port latch
S
RDY2•SBUSY2 pin
Internal synchronous
clock selection bits
“0”
Serial I/O2
synchronous clock
control bit
S
BUSY2
“1”
selection bit
Synchronous
circuit
“0
”
Port latch
“0”
S
RDY2•SBUSY2 pin
control bit
“1”
Serial I/O2 clock
pin selection bit
S
RDY2
“1”
“0”
“1”
Serial transfer
status flag
Serial I/O2
interrupt request
Port latch
“0”
S
CLK21
“0”
“1”
“1”
“1”
Serial I/O2 counter
S
CLK22
Serial I/O2 clock
pin selection bits
“0”
Port latch
“0”
Port latch
S
OUT2
“1” Serial transfer selection bits
Serial I/O2 register (8)
S
IN2
Figure GA-1. Block Diagram of Serial I/O2
102
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O2 control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
SIO2CON1
Address
034216
When reset
0016
Bit symbol
SCON10
Bit name
Function
R
W
b1 b0
Serial transfer select bits
00: Serial I/O disabled
(serial I/O pins are I/O ports)
01: 8-bits serial I/O
10: Inhibit
11: Automatic transfer serial I/O (8-bits)
SCON11
SCON12
b3 b2
Serial I/O2 synchronous
clock select bits
(SSTB2 pin control bit)
00: Internal synchronous clock
(SSTB2 pin is an I/O port.)
01: External synchronous clock
(SSTB2 pin is an I/O port.)
10: Internal synchronous clock
(SSTB2 pin is an SSTB2 output.)
11: Internal synchronous clock
(SSTB2 pin is an SSTB2 output.)
SCON13
0: Serial I/O initialization
1: Serial I/O enabled
Serial I/O initialization bit
Transfer mode select bit
SCON14
SCON15
0: Full duplex (transmit and receive) mode
(SIN2 pin is a SIN2 input.)
1: Transmit-only mode (SIN2 pin is an I/O port.)
Transfer direction
select bit
0: LSB first
1: MSB first
SCON16
SCON17
0:SCLK21 (SCLK22 pin is an I/O port.)
1:SCLK22 (SCLK21 pin is an I/O port.)
Serial I/O2 clock pin
select bit
Serial I/O2 control register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
SIO2CON2
Address
034416
When reset
0016
Bit name
Function
Bit symbol
SCON20
R
W
S
RDY2 • SBUSY2 pin
control bits
S
RDY2 pin
I/O port
Not used
RDY2 output
RDY2 output
I/O port
I/O port
I/O port
I/O port
RDY2 input
RDY2 input
RDY2 input
RDY2 input
RDY2 output
RDY2 output
RDY2 output
RDY2 output
SBUSY2 pin
I/O port
b3b2b1b0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
S
S
I/O port
I/O port
SCON21
SCON22
SCON23
S
S
S
S
S
S
S
S
S
S
S
S
BUSY2 input
BUSY2 input
BUSY2 output
BUSY2 output
BUSY2 output
BUSY2 output
BUSY2 output
BUSY2 output
BUSY2 input
BUSY2 input
BUSY2 input
BUSY2 input
S
S
S
S
S
S
S
S
S
BUSY2 output • SSTB2 output
0: Functions as each 1-byte signal
1: Functions as signal for all transfer data
SCON24
function select bit
(Valid in automatic transfer mode)
Serial transfer status flag
0: Serial transfer completion
1: Serial transferring
SCON25
SCON26
S
OUT2 pin control bit
(at no-transfer serial data)
0: Output active
1: Output high-impedance
S
OUT2 P-channel output
0: CMOS 3-state (P-channel output is valid.)
1: N-channel open-drain
(P-channel output is invalid.)
SCON27
disable bit
Figure GA-2. Serial I/O2 Control Registers 1, 2
103
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O2 automatic transfer data pointer
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
SIO2DP
Address
034016
When reset
0016
Function
• Automatic transfer data pointer set
R
W
Specify the low-order 8 bits of the first data store address on the serial I/O
automatic transfer RAM.
Data is written into the latch and read from the decrement counter.
Serial I/O2 register/transfer counter
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
SIO2
Address
034616
When reset
0016
Function
R
W
• Number of automatic transfer data set
Set the number of automatic transfer data.
Set a value one less than number of transfer data.
Data is written into the latch and read from the decrement counter.
Serial I/O2 control register 3
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
SIO2CON3
Address
034816
When reset
00000000
2
Bit symbol
TTRAN0
Bit name
Function
R
W
b4b3b2b1b0
Automatic transfer
interval set bits
00000 :2 cycles of transfer clocks
00001 :3 cycles of transfer clocks
:
11110 :32 cycles of transfer clocks
11111 :33 cycles of transfer clocks
TTRAN1
TTRAN2
TTRAN3
TTRAN4
Data is written to a latch and read from
a decrement counter.
b7b6b5
Internal synchronous
clock selection bits
TCLK0
TCLK1
TCLK2
000:f(XIN)/4
001:f(XIN)/8
010:f(XIN)/16
011:f(XIN)/32
100:f(XIN)/64
101:f(XIN)/128
110:f(XIN)/256
Figure GA-3. Serial I/O2 automatic transfer data pointer
104
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table GA-2 lists the functions of the serial I/O2 input/output pins
Table GA-2. Functions of the serial I/O2 input/output pins
Pin name
Function
Method of selection
direction register (bit 4 at address 03F316)= “1”
OUT2 P-channel output disable bit (bit 7 at address 034416)= “0” , “1”
OUT2 pin control bit (bit 6 at address 034416)= “0” , “1”
S
OUT2
Port P94
S
S
Serial data output
(P94
)
(Outputs dummy data when performing reception only)
SIN2
Serial data input
Port P9 direction register (bit 4 at address 03F316)= “0”
3
(P93)
Transfer mode select bit (bit 5 at address 034216)= “0”
(Input/output port when transfer mode select bit (bit 5 at address 034216)= “1”)
Transfer clock output
Transfer clock input
S
(P95)
CLK21
Serial I/O2 synchronous clock select bits (bits 2, 3 at address 034216) = “00” , “01”
Serial I/O2 clock pin select bit (bit 7 at address 034216) = “0”
Serial I/O2 synchronous clock select bits (bits 2, 3 at address 034216) = “01” , “11”
Serial I/O2 clock pin select bit (bit 7 at address 034216) = “0”
Port P95 direction register (bit 5 at address 03F316)= “0”
Transfer clock output
Transfer clock input
S
(P96)
CLK22
Serial I/O2 synchronous clock select bits (bits 2, 3 at address 034216) = “00” , “01”
Serial I/O2 clock pin select bit (bit 7 at address 034216) = “1”
Serial I/O2 synchronous clock select bits (bits 2, 3 at address 034216) = “01” , “11”
Serial I/O2 clock pin select bit (bit 7 at address 034216) = “1”
Port P96 direction register (bit 6 at address 03F316)= “0”
SRDY input / output
SBUSY input / output
SSTB input / output
Set by SRDY2 • SBUSY2 pin control bits (bits 0 to 3 at address 034416
)
S
(P90)
RDY2
Set by SRDY2 • SBUSY2 pin control bits (bits 0 to 3 at address 034416
)
S
(P91)
BUSY2
S
BUSY2 output • SSTB2 output function select bit (bit 4 at address 034416)= “0” , “1”
Serial I/O2 synchronous clock select bits (bits 2, 3 at address 034216) = “10” , “11”
BUSY2 output • SSTB2 output function select bit (bit 4 at address 034416)= “0” , “1”
S
(P92)
STB2
S
SOUT2 Output
Either output active or high-impedance can be selected as a SOUT2 pin state at serial non-transfer by the
SOUT2 pin control bit (bit 6 of address 034416).
However, when the external synchronous clock is selected, perform the following setup to put the SOUT2
pin into a high-impedance state.
When the SCLK2i ( i = 1, 2) input is “H” after completion of transfer, set the SOUT2 pin control bit to “1”. When
the SCLK2i ( i = 1, 2) input goes to “L” after the start of the next serial transfer, the SOUT2 pin control bit is
automatically reset to “0” and put into an output active state.
105
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O2 Mode
There are two types of serial I/O2 modes: 8-bit serial I/O mode where automatic transfer RAM is not
used, and an automatic transfer serial I/O mode.
(1) 8-bit Serial I/O Mode
Address 034616 is assigned to the serial I/O2 register. When the internal synchronous clock is
selected, a serial transfer of the 8-bit serial I/O is started by a write signal to the serial I/O2 register
(address 034616).
The serial transfer status flag (bit 5 of address 034416) is set to “1” by writing into the serial I/O2
register and reset to “0” after completion of 8-bit transfer. At the same time, a serial I/O2 interrupt
request occurs. If the transfer is completed, the receive data is read out from serial I/O2 register.
When the external synchronous clock is selected, the contents of the serial I/O2 register are con-
tinuously shifted while transfer clocks are input to SCLK21 or SCLK22. Therefore, the clock needs to
be controlled externally.
(2) Automatic Transfer Serial I/O Mode
Address 034616 is assigned to the transfer counter (1-byte units). The serial I/O2 automatic trans-
fer controller controls the write and read operations of the serial I/O2 register. The serial I/O auto-
matic transfer RAM is mapped to addresses 0040016 to 004FF16. Before starting transfer, make
sure the 8 low-order bits of the address that contains the beginning data to be serially transferred is
set to the automatic transfer data pointer (address 034016).
When the internal synchronous clock is selected, the transfer interval is inserted between one data
and another in the following cases:
1. When using no handshake signal
2. When using the SRDY2 output, SBUSY2 output, and SSTB2 output of the handshake signal inde
pendently
3. When using a combination of SRDY2 output and SSTB2 output or a combination of SBUSY2 output
and SSTB2 output of the handshake signal
The transfer interval can be set in the range of 2 to 23 cycles using the automatic transfer interval
set bit (bits 0–4 of address 034816 ).
Also, when using SBUSY2 output as a signal for each occurrence of the all transfer data, a transfer
interval is inserted before the system starts sending or receiving the first data and after the system
finished sending or receiving the last data, not just between one data and another.
Furthermore, when using SSTB2 output, the transfer interval between each 1-byte data is extended
by 2 cycles from the set value no matter how the SBUSY2 output. SSTB2 output function select bit (bit
4 of address 034416) is set.
When using SBUSY2 output and SSTB2 output in combination as a signal for each occurrence of the
all transfer data, the transfer interval after the system finished sending or receiving the last data is
extended by 2 cycles from the set value.
When an external synchronous clock is selected, the automatic transfer interval is disabled.
106
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
When the internal synchronous clock is selected, automatic serial transfer starts by writing 1 less than
the number of transfer bytes to the transfer counter (address 034616). When an external sync clock is
selected, automatic serial transfer starts by writing 1 less than the number of transfer bytes to the
transfer counter and the transfer clock is input. In this case, allow for at least 5 cycles of internal
system clock before the transfer clock is input after writing to the transfer counter.
Also, for data to data transfer intervals, allow at least 5 cycles of internal system clock reckoning from
a rise of clock at the last bit of one-byte data.
Regardless of whether the internal or external synchronous clock is selected, the automatic transfer
data pointer and the transfer counter are decreased after each 1-byte data is received and then written
into the automatic transfer RAM. The serial transfer status flag (bit5 of address 034416) is set to “1” by
writing data into the transfer counter. The serial transfer status flag is reset to “0” after the last data is
written into the automatic transfer RAM. At the same time, a serial I/O2 interrupt request occurs.
The values written in the automatic transfer data pointer (address 034016) and the automatic transfer
interval set bits (bit 0 to bit 4 of address 034816) are held in the latch.
When data is written into the transfer counter, the values latched in the automatic transfer data pointer
(address 034016) and the automatic transfer interval set bits (bit 0 to bit 4) are transferred to the
decrement counter.
Automatic transfer RAM
004FF16
Automatic transfer
data pointer
5216
0045216
0045116
0045016
0044F16
0044E16
Transfer counter
0416
0040016
S
IN2
S
OUT2
Serial I/O2 register
Figure GA-5. Automatic Transfer Serial I/O Operation
107
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Handshake Signal
There are five types of handshake signal : SSTB2 output, SBUSY2 input/output, and SRDY2 input/output.
(1) SSTB2 output signal
The SSTB2 output is a signal to inform an end of transmission/reception to the serial transfer destina-
tion. The SSTB2 output signal can be used only when the internal synchronous clock is selected. In the
initial status [ serial I/O initialization bit (bit 4 of address 034216) = “0” ], the SSTB2 output goes to “L”
__________
(bits 2, 3 of address 034216=11), or the SSTB2 output goes to “H” (bits 2, 3 of address 034216=10).
At the end of transmit/receive operation, after the all data of the serial I/O2 register (address 034616) is
_________
output from SOUT2, SSTB2 output is “H” (or SSTB2 output is “L”) in the period of 1 cycle of the transfer clock.
Furthermore, after 1 cycle, the serial transfer status flag (bit 5 of address 034416) is reset to “0”.
In the automatic transfer serial I/O mode, whether the SSTB2 output is to be output at an end of each 1-byte
data or after completion of transfer of all data can be selected by the SBUSY2 output • SSTB2 output function
select bit (bit 4 of address 034416).
•Serial operation used SSTB2 output
Operation mode
Transfer clock
: 8-bit serial I/O mode
: Internal synchronous clock
: Each 1-byte data
SSTB2 output timing
Tc
Internal clock
Serial transfer status flag
"1"
"0"
(bit 5 at address 034416
)
SCLK2i
(i=1, 2)(output)
"H"
"L"
S
STB2(output)
OUT2
S
D
0
D1
D2
D
3
D
4
D
5
D6
D7
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
•Serial operation used SSTB2 output
Operation mode
Transfer clock
: Automatic transfer serial I/O mode
: Internal synchronous clock
: Each transfer of all data
SSTB2 output timing
Automatic
transfer interval
Tc
Internal clock
"1"
"0"
Serial transfer status flag
(bit 5 at address 034416
)
SCLK2i
(i=1, 2)(output)
"H"
"L"
S
STB2(output)
S
OUT2
D
0
D
1
D2
D3
D
4
D
5
D
6
D7
D
0
D
1
D2
D3
D
4
D
5
D
6
D7
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-6. SSTB2 Output Operation
108
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) SBUSY2 input signal
The SBUSY2 input is a signal requested to stop of transmission/reception from the serial transfer des-
tination.
When the internal synchronous clock is selected, input a “H” level signal into the SBUSY2 input (or a “L”
___________
level signal into the SBUSY2 input) in the initial status [serial I/O initialization bit (bit 4 of address
____________
034216) = “0”]. When a “L” level signal into the SBUSY2 ( or “H” on SBUSY2 ) input for 1.5 cycles or more
of transfer clock, transfer clocks are output from SCLK2i (i = 1, 2), and transmit/receive operation is
____________
started. When SBUSY2 input is driven “H” (or SBUSY2 input is driven “L”) during transmit/receive
operation, the transfer clock being output from SCLK2i (i = 1, 2) remains active until after the system
finishes sending or receiving the designated number of bits, without stopping the transmit/receive
operation immediately. The handshake unit of the 8-bit serial I/O is 8 bits, and that of the automatic
transfer serial I/O is 8 bits.
•Serial operation used SBUSY2 input
Operation mode
Transfer clock
: 8-bit serial I/O mode
: Internal synchronous clock
: Each 1-byte data
S
BUSY2 input timing
Tc
Internal clock
"1"
"0"
Serial transfer status flag
1.5 cycle or more
(bit 5 at address 034416
)
"H"
"L"
S
BUSY2(input)
S
CLK2i
(i = 1, 2)(output)
SOUT2
D
0
D1
D2
D
3
D
4
D
5
D6
D7
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-7. SBUSY2 Input Operation (1)
When the external synchronous clock is selected, input a “H” level signal into the SBUSY2 input (or a “L”
___________
level signal into the SBUSY2 input) in the initial status[serial I/O initialization bit (bit 4 of address 034216)
= “0”]. At this time, the transfer clock become invalid. The transfer clock become valid while a “L” level
___________
signal is input into the SBUSY2 input (or a “H” level signal into the SBUSY2 input) and transmit/receive
operation work.
___________
When changing the input values into the SBUSY2 (or SBUSY2) input at these operations, change them
when the transfer clock input is in a “H” state. When the high-impedance of the SOUT2 output is
selected by the SOUT2 pin control bit (bit 6 of address 034416), the SOUT2 becomes high-impedance,
___________
while a “H” level signal is input into the SBUSY2 input (or a “L” level signal into the SBUSY2 input.)
•Serial operation used SBUSY2 input
Operation mode
Transfer clock
: 8-bit serial I/O mode
: External synchronous clock
: Each 1-byte data
S
BUSY2 input timing
"1"
Serial transfer status flag
"0"
(bit 5 at address 034416
BUSY2(input
CLK2i
)
"H"
S
)
"L"
S
(i = 1, 2)(input
)
Invalid
SOUT2
High-impedance
High-impedance
Note
D0
D
1
D
2
D
3
D4
D5
D
6
D7
Note: The last output data
Figure GA-8. SBUSY2 Input Operation (2)
109
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) SBUSY2 output signal
The SBUSY2 output is a signal which requests to stop of transmission/reception to the serial transfer
destination. In the automatic transfer serial I/O mode, regardless of the internal or external synchro-
nous clock, whether the SBUSY2 output is to be output at transfer of each 1-byte data or during transfer
of all data can be selected by the SBUSY2 output • SSTB2 output function select bit (bit 4 of address
034416). In the initial status[ serial I/O initialization bit (bit 4 of address 034216) = “0” ], the status in
____________
which the SBUSY2 outputs “H” (or the SBUSY2 outputs “L”).
When the internal synchronous clock is selected, in the 8-bit serial I/O mode and the automatic trans-
fer serial I/O mode (SBUSY2 output function: each 1-byte signal is selected), the SBUSY2 output goes to
____________
“L” (or the SBUSY2 output goes to “H”) before 0.5 cycle of the timing at which the transfer clock goes to
“L” . In the automatic transfer serial I/O mode (the SBUSY2 output function: all transfer data is selected),
____________
the SBUSY2 output goes to “L” (or the SBUSY2 output goes to “H”) when the first transmit data is written
into the serial I/O2 register (address 034616).
•Serial operation used SBUSY2 output
Operation mode
Transfer clock
: 8-bit serial I/O mode
: Internal synchronous clock
: Each 1-byte data
S
BUSY2 output timing
Tc
Internal clock
"1"
"0"
Serial transfer status flag
(bit 5 at address 034416
)
S
CLK2i
(i = 1, 2)(output)
"H"
"L"
S
BUSY2(output)
S
OUT2
D0
D
1
D
2
D3
D4
D
5
D
6
D7
TC : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-9. SBUSY2 Output Operation (1)
____________
When the external synchronous clock is selected, the SBUSY2 output goes to “L” (or the SBUSY2 output
goes to “H”) when transmit data is written into the serial I/O2 register(address 034616), regardless of
the serial I/O transfer mode.
At termination of transmit/receive operation, in the 8-bit serial I/O mode, the SBUSY2 output goes to “H”
____________
(or the SBUSY2 output returns to “L”), when the serial transfer status flag is set to “0”, regardless of
whether the internal or external synchronous clock is selected. Furthermore, in the automatic transfer
serial I/O mode (SBUSY2 output function: each 1-byte signal is selected), the SBUSY2 output goes to “H”
____________
(or the SBUSY2 output goes to “L”) each time 1-byte of receive data is written into the automatic trans-
fer RAM.
•Serial operation used SBUSY2 output
Operation mode
Transfer clock
: 8-bit serial I/O mode
: External synchronous clock
: Each 1-byte data
SBUSY2 output timing
"1"
Serial transfer status flag
(bit 5 at address 034416
)
"0"
SCLK2i
(i = 1, 2)(Input)
"H"
S
BUSY2(output)
"L"
S
OUT2
D
0
D
1
D
2
D3
D4
D5
D
6
D7
Write to serial I/O register
(Address 034616
)
Figure GA-10. SBUSY2 Output Operation (2)
110
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
•Serial operation used SBUSY2 output
Operation mode
Transfer clock
: Automatic transfer serial I/O mode
: Internal synchronous clock
: Each 1-byte data
SBUSY2 output timing
Automatic
transfer interval
Tc
Internal clock
"1"
Serial transfer status flag
(bit 5 at address 034416
)
"0"
Automatic transfer RAM
Serial I/O2 register
Serial I/O2 register
Automatic transfer RAM
"H"
S
BUSY2(output)
"L"
SCLK2i
(i = 1, 2)(output)
S
OUT2
D0
D1
D
2
D
3
D4
D5
D
6
D
7
D0
D1
D
2
D
3
D4
D5
D
6
D7
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
•Serial operation used SBUSY2 output
Operation mode
Transfer clock
: Automatic transfer serial I/O mode
: Internal synchronous clock
: Each transfer of all data
SBUSY2 output timing
Automatic
Tc
transfer interval
Internal clock
"1"
Serial transfer status flag
(bit 5 at address 034416
)
"0"
Automatic transfer RAM
Serial I/O2 register
Serial I/O2 register
Automatic transfer RAM
"H"
BUSY2(output)
S
"L"
SCLK2i
(i = 1, 2)(output)
S
OUT2
D0
D1
D2
D
3
D
4
D5
D6
D
7
D0
D1
D2
D
3
D
4
D5
D6
D7
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-11. SBUSY2 Output Operation (3)
111
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) SRDY2 output signal
The SRDY2 output is a transmit/receive enable signal which informs the serial transfer destination that
transmit/receive is ready. In the initial status[serial I/O initialization bit (bit 4 of address 034216) = “0” ],
__________
the SRDY2 output goes to “L” (or the SRDY2 output goes to “H”). When the transmitted data is written to
__________
the serial I/O2 register (address 034616), the SRDY2 output goes to “H” (or the SRDY2 output goes to
“L”). When a transmit/receive operation is started and the transfer clock goes to “L”, the SRDY2 output
__________
goes to “L” (or the SRDY2 output goes to “H”).
•Serial operation used SRDY2 output
Operation mode
Transfer clock
: 8-bit serial I/O mode
: Internal synchronous clock
Tc
Internal clock
"H"
"L"
S
RDY2
(output)
S
CLK2i
(i = 1, 2) (output)
S
OUT2
D
0
D
1
D2
D3
D
4
D
5
D6
D7
"1"
Serial transfer status flag
(bit 5 at address 034416
)
"0"
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-12. SRDY2 Output Operation
(5) SRDY2 input signal
The SRDY2 input is a signal for receiving a transmit/receive ready completion signal from the serial
transfer destination. The SRDY2 input signal becomes valid only when the SRDY2 input and the SBUSY2
output are used.
When the internal synchronous clock is selected, input a “L” level signal into the SRDY2 input (or a “H”
__________
level signal into the SRDY2 input) in the initial status[serial I/O initialization bit (bit 4 of address 034216)
__________
= “0” ]. When a “H” level signal is input into the SRDY2 input (or a “L” level signal is input into the SRDY2
input) for a period of 1.5 cycles or more of transfer clock, transfer clocks are output from the SCLK2i (i =
__________
1, 2) output and a transmit/receive operation is started. When SRDY2 input is driven “L” (or SRDY2 input
is driven “H”) during transmit/receive operation, the transfer clock being output from SCLK2i (i = 1, 2)
remains active until after the system finishes sending or receiving the designated number of bits,
without stopping the transmit/receive operation immediately.
The handshake unit of the 8-bit serial I/O is 8 bits, and that of the automatic transfer serial I/O is 8 bits.
When the external synchronous clock is selected, the SRDY2 input becomes one of the triggers to
____________
output the SBUSY2 signal. To start a transmit/receive operation (SBUSY2 output: “L”, (or SBUSY2 output:
__________
“H”)), input a “H” level signal into the SRDY2 input (or a “L” level signal into the SRDY2 input,) and also
write transmit data into the serial I/O2 register (address 034616).
•Serial operation used SRDY2 input
Operation mode
Transfer clock
: 8-bit serial I/O mode
: Internal synchronous clock
Tc
Internal clock
"1"
"0"
Serial transfer status flag
(bit 5 at address 034416
)
1.5 cycle or more
"H"
"L"
S
(input
RDY2
)
SCLK2i
(i = 1, 2) (output)
D
0
D1
D2
D
3
D
4
D5
D6
D7
S
OUT2
Tc : Internal synchronous clock is selected by bits 5 to 7 of address 034816
Figure GA-13. SRDY2 Input Operation
112
Mitsubishi microcomputers
M30218 Group
Serial I/O2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Write to serial
I/O2 register
A:
SCLK2i
(i = 1, 2)
SCLK2i
(i = 1, 2)
SRDY2
SRDY2
SRDY2
SBUSY2
SBUSY2
SBUSY2
SCLK2i
(i = 1, 2)
A:
B:
Internal synchronous
clock selection
External synchronous
Write to serial
I/O2 register
B:
clock selection
Figure GA-14. Handshake Operation at Serial I/O2 Mutual Connecting (1)
Write to serial
A:
I/O2 register
S
CLK2i
S
CLK2i
(i= 1, 2)
(i= 1, 2)
S
RDY2
S
RDY2
S
RDY2
S
BUSY2
S
BUSY2
S
BUSY2
S
(i= 1, 2)
CLK2i
A:
B:
Internal synchronous
clock selection
External synchronous
clock selection
Write to serial
I/O2 register
B:
Figure GA-15. Handshake Operation at Serial I/O2 Mutual Connecting (2)
113
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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 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 JA-1 shows the performance of the A-D converter. Figure JA-1 shows the block diagram of the A-D
converter, and Figures JA-2 and JA-3 show the A-D converter-related registers.
Table JA-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 φAD (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
• Without sample and hold function (10-bit resolution)
±3LSB
VCC = 3V
• Without sample and hold function (8-bit resolution)(Note 3)
±2LSB
Operating modes
Analog input pins
One-shot mode, repeat mode, single sweep mode, repeat sweep mode 0,
and repeat sweep mode 1
8pins (AN0 to AN7)
A-D conversion start condition •Software trigger
A-D conversion starts when the A-D conversion start flag changes to “1”
•Without sample and hold function
8-bit resolution: 49 AD cycles, 10-bit resolution: 59
Conversion speed per pin
φ
φAD cycles
• With sample and hold function
8-bit resolution: 28 φAD cycles, 10-bit resolution: 33 φAD cycles
Note 1: Does not depend on use of sample and hold function.
Note 2: Without sample and hold function, set the
With the sample and hold function, set the
Note 3: Only mask ROM version.
φ
AD frequency to 250kHz min.
φ
AD frequency to 1MHz min.
114
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
CKS1=1
AD
CKS0=1
CKS0=0
f
AD
1/2
1/2
A-D conversion
rate selection
CKS1=0
VCUT=0
VCUT=1
AVSS
Resistor ladder
V
REF
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
)
)
)
)
)
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)
V
ref
Decoder
(03CB16, 03CA16
(03CD16, 03CC16
(03CF16, 03CE16
)
Comparator
V
IN
)
)
Data bus high-order
Data bus low-order
CH2,CH1,CH0=000
AN
AN
AN
AN
AN
AN
AN
AN
0
1
2
3
4
5
6
7
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
Figure JA-1. Block diagram of A-D converter
115
Mitsubishi microcomputers
M30218 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
Address
03D616
When reset
00000XXX2
0
R W
Bit symbol
Bit name
Function
0 is selected
b2 b1 b0
Analog input pin select bit
CH0
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
b4 b3
1
2
3
4
5
6
7
is selected
is selected
is selected
is selected
is selected
is selected
is selected
CH1
CH2
MD0
MD1
A-D operation mode
select bit 0
0 0 : One-shot mode
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0
Repeat sweep mode 1
Must always be “0”.
A-D conversion start flag
Frequency select bit 0
0 : A-D conversion disabled
1 : A-D conversion started
ADST
CKS0
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
Symbol
ADCON1
Address
03D716
When reset
0016
0
0
Bit symbol
Bit name
Function
R W
When single sweep and repeat sweep
A-D sweep pin select
bit
mode 0 are selected
b1 b0
SCAN0
SCAN1
MD2
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
, AN1 (2 pins)
to AN
to AN
to AN
3
5
7
(4 pins)
(6 pins)
(8 pins)
When repeat sweep mode 1 is selected
b1 b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
(1 pin)
, AN
1
(2 pins)
to AN
to AN
2
3
(3 pins)
(4 pins)
0 : Any mode other than repeat sweep
mode 1
1 : Repeat sweep mode 1
A-D operation mode
select bit 1
8/10-bit mode select bit
Frequency select bit 1
0 : 8-bit mode
1 : 10-bit mode
BITS
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
CKS1
Vref connect bit
0 : Vref not connected
1 : Vref connected
VCUT
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is
indeterminate.
Figure JA-2. A-D converter-related registers (1)
116
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A-D control register 2 (Note)
Symbol
ADCON2
Address
03D416
When reset
XXXXXXX02
b7 b6 b5 b4 b3 b2 b1 b0
Bit symbol
SMP
Bit name
Function
R W
0
1
Without sample and hold
With sample and hold
A-D conversion method
select bit
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.
Symbol
ADi (i=0 to 7)
Address
When reset
A-D register i
(b15)
03C016 to 03CF16 Indeterminate
(b8)
b0 b7
b7
b0
Function
R W
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”.
Figure JA-3. A-D converter-related registers (2)
117
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(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
JA-2 shows the specifications of one-shot mode. Figure JA-4 shows the A-D control register in one-shot mode.
Table JA-2. One-shot mode specifications
Item
Specification
Function
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
Start condition
Stop condition
•End of A-D conversion (A-D conversion start flag changes to “0”)
•Writing “0” to A-D conversion start flag
Interrupt request generation timing End of A-D conversion
Input pin
One of AN0 to AN7, as selected
Reading of result of A-D converter Read A-D register corresponding to selected pin
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address
03D616
When reset
00000XXX2
0
0 0
Bit symbol
CH0
Bit name
Function
R W
b2 b1 b0
Analog input pin
select bit
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
0
1
2
3
4
5
6
7
is selected
is selected
is selected
is selected
is selected
is selected
is selected
is selected
CH1
CH2
b4 b3
MD0
MD1
A-D operation mode
select bit 0
0 0 : One-shot mode
Must always be “0”.
A-D conversion start flag 0 : A-D conversion disabled
1 : A-D conversion started
ADST
CKS0
0: fAD/4 is selected
1: fAD/2 is selected
Frequency select bit 0
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
Symbol
ADCON1
Address
03D716
When reset
0016
0
0
1
0
Bit symbol
Bit name
A-D sweep pin
Function
R W
Invalid in one-shot mode
SCAN0
SCAN1
MD2
select bit
A-D operation mode
select bit 1
0 : Any mode other than repeat sweep
mode 1
8/10-bit mode select bit 0 : 8-bit mode
1 : 10-bit mode
BITS
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
CKS1
VCUT
Frequency select bit1
Vref connect bit
1 : Vref connected
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversion
result is indeterminate.
Figure JA-4. A-D conversion register in one-shot mode
118
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) Repeat mode
In repeat mode, the pin selected using the analog input pin select bit is used for repeated A-D conversion. Table
JA-3 shows the specifications of repeat mode. Figure JA-5 shows the A-D control register in repeat mode.
Table JA-3. Repeat mode specifications
Item
Specification
Function
The pin selected by the analog input pin select bit is used for repeated A-D conversion
Writing “1” to A-D conversion start flag
Star condition
Stop condition
Writing “0” to A-D conversion start flag
Interrupt request generation timing None generated
Input pin
One of AN0 to AN7, as selected
Reading of result of A-D converter Read A-D register corresponding to selected pin
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address
03D616
When reset
00000XXX2
0
0 1
Bit symbol
Bit name
Function
R W
b2 b1 b0
Analog input pin
select bit
CH0
CH1
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
CH2
b4 b3
MD0
MD1
A-D operation mode
select bit 0
0 1 : Repeat mode
Must always be “0”.
A-D conversion start flag 0 : A-D conversion disabled
1 : A-D conversion started
ADST
CKS0
0 : fAD/4 is selected
Frequency select bit 0
1 : fAD/2 is selected
Note: If the A-D control register is rewritten during A-D conversion, the conversin
result is indeterminate.
A-D control register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON1
Address
03D716
When reset
0016
0
0
1
0
R W
Bit symbol
Bit name
Function
A-D sweep pin select bit Invalid in repeat mode
SCAN0
SCAN1
A-D operation mode
select bit 1
0 : Any mode other than repeat sweep mode 1
MD2
8/10-bit mode select bit 0 : 8-bit mode
1 : 10-bit mode
BITS
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
CKS1
Frequency select bit 1
VCUT
Vref connect bit
1 : Vref connected
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversn
result is indeterminate.
Figure JA-5. A-D conversion register in repeat mode
119
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) Single sweep mode
In single sweep mode, the pins selected using the A-D sweep pin select bit are used for one-by-one A-D
conversion. Table JA-4 shows the specifications of single sweep mode. Figure JA-6 shows the A-D
control register in single sweep mode.
Table JA-4. Single sweep mode specifications
Item
Specification
Function
The pins selected by the A-D sweep pin select bit are used for one-by-one A-D conversion
Start condition
Stop condition
Writing “1” to A-D converter 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
Interrupt request generation timing End of A-D conversion
AN and AN (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), or AN0 to AN7 (8 pins)
Input pin
0
1
Reading of result of A-D converter Read A-D register corresponding to selected pin
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address
03D616
When reset
00000XXX
0
1 0
2
Bit symbol
Bit name
Function
R W
Analog input pin select bit Invalid in single sweep mode
CH0
CH1
CH2
b4 b3
A-D operation mode
select bit 0
MD0
MD1
1 0 : Single sweep mode
Must always be “0”.
A-D conversion start flag 0 : A-D conversion disabled
ADST
CKS0
1 : A-D conversion started
0 : fAD/4 is selected
Frequency select bit 0
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
Symbol
ADCON1
Address
03D716
When reset
0016
0
0
1
0
Bit symbol
Bit name
Function
R W
A-D sweep pin select bit When single sweep and repeat sweep mode 0
SCAN0
are selected
b1 b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
, AN1 (2 pins)
to AN
to AN
to AN
3
5
7
(4 pins)
SCAN1
(6 pins)
(8 pins)
A-D operation mode
select bit 1
0 : Any mode other than repeat sweep mode 1
MD2
BITS
8/10-bit mode select bit
Frequency select bit 1
Vref connect bit
0 : 8-bit mode
1 : 10-bit mode
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
CKS1
VCUT
1 : Vref connected
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversion result
is indeterminate.
Figure JA-6. A-D conversion register in single sweep mode
120
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) Repeat sweep mode 0
In repeat sweep mode 0, the pins selected using the A-D sweep pin select bit are used for repeat sweep
A-D conversion. Table JA-5 shows the specifications of repeat sweep mode 0. Figure JA-7 shows the A-
D control register in repeat sweep mode 0.
Table JA-5. Repeat sweep mode 0 specifications
Item
Specification
Function
The pins selected by the A-D sweep pin select bit are used for repeat sweep A-D conversion
Writing “1” to A-D conversion start flag
Start condition
Stop condition
Writing “0” to A-D conversion start flag
Interrupt request generation timing None generated
AN and AN (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), or AN0 to AN7 (8 pins)
Input pin
0
1
Reading of result of A-D converter Read A-D register corresponding to selected pin (at any time)
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address
03D616
When reset
00000XXX
0
1
1
2
Bit symbol
Bit name
Function
R W
Analog input pin select bit Invalid in repeat sweep mode 0
CH0
CH1
CH2
b4 b3
A-D operation mode
select bit 0
MD0
MD1
1 1 : Repeat sweep mode 0
Must always be “0”.
A-D conversion start flag 0 : A-D conversion disabled
ADST
CKS0
1 : A-D conversion started
0 : fAD/4 is selected
Frequency select bit 0
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
Symbol
ADCON1
Address
03D716
When reset
0016
1
0
0
0
Bit symbol
Bit name
Function
R W
A-D sweep pin select bit When repeat sweep mode 1 is selected
SCAN0
b1 b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
, AN1 (2 pins)
to AN
to AN
to AN
3
5
7
(4 pins)
SCAN1
(6 pins)
(8 pins)
A-D operation mode
select bit 1
1 : Any mode other than repeat sweep mode 1
MD2
BITS
0 : 8-bit mode
1 : 10-bit mode
8/10-bit mode select bit
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
Frequency select bit 1
Vref connect bit
CKS1
VCUT
1 : Vref connected
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversion result
is indeterminate.
Figure JA-7. A-D conversion register in repeat sweep mode 0
121
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(5) Repeat sweep mode 1
In repeat sweep mode 1, all pins are used for A-D conversion with emphasis on the pin or pins selected
using the A-D sweep pin select bit. Table JA-6 shows the specifications of repeat sweep mode 1. Figure
JA-8 shows the A-D control register in repeat sweep mode 1.
Table JA-6. Repeat sweep mode 1 specifications
Item
Specification
Function
All pins perform repeat sweep A-D conversion, with emphasis on the pin or
pins selected by the A-D sweep pin select bit
Example : AN0 selected -> AN0 -> AN1 -> AN0 -> AN2 -> AN0 -> AN3, etc
Writing “1” to A-D conversion start flag
Start condition
Stop condition
Writing “0” to A-D conversion start flag
Interrupt request generation timing None generated
Input pin
Emphasis on the pin AN0 (1 pin), AN0 and AN1 (2 pins), AN0 to AN2 (3 pins), AN0 to AN3 (4 pins)
Reading of result of A-D converter Read A-D register corresponding to selected pin (at any time)
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address
03D616
When reset
00000XXX
0
1
1
2
Bit symbol
Bit name
Function
R W
Analog input pin select bit Invalid in repeat sweep mode 0
CH0
CH1
CH2
b4 b3
A-D operation mode
select bit 0
MD0
MD1
1 1 : Repeat sweep mode 1
Must always be “0”.
A-D conversion start flag 0 : A-D conversion disabled
ADST
CKS0
1 : A-D conversion started
0 : fAD/4 is selected
Frequency select bit 0
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
Symbol
ADCON1
Address
03D716
When reset
0016
1
0
0
1
Bit symbol
Bit name
Function
R W
A-D sweep pin select bit When repeat sweep mode 1 is selected
SCAN0
b1 b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
(1 pins)
, AN
1
(2 pins)
SCAN1
to AN
to AN
2
3
(3 pins)
(4 pins)
A-D operation mode
select bit 1
1 : Repeat sweep mode 1
MD2
BITS
0 : 8-bit mode
1 : 10-bit mode
8/10-bit mode select bit
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
Frequency select bit 1
Vref connect bit
CKS1
VCUT
1 : Vref connected
Must always be “0”.
Note: If the A-D control register is rewritten during A-D conversion, the conversion result
is indeterminate.
Figure JA-8. A-D conversion register in repeat sweep mode 1
122
Mitsubishi microcomputers
M30218 Group
A-D converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(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, 28 φ AD
cycles are achieved with 8-bit resolution and 33 φ AD cycles 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.
123
Mitsubishi microcomputers
M30218 Group
D-A converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D-A Converter
This is an 8-bit, R-2R type D-A converter. The microcomputer contains two independent D-A converters of this type.
D-A conversion is performed when a value is written to the corresponding D-A register. Bits 0 and 1 (D-A
output enable bits) of the D-A control register decide if the result of conversion is to be output. Do not set the
target port to output mode if D-A conversion is to be performed.
Output analog voltage (V) is determined by a set value (n : decimal) in the D-A register.
V = VREF X n/ 256 (n = 0 to 255)
VREF : reference voltage
Table JB-1 lists the performance of the D-A converter. Figure JB-1 shows the block diagram of the D-A
converter. Figure JB-2 shows the D-A control register. Figure JB-3 shows the D-A converter equivalent
circuit.
Table JB-1. Performance of D-A converter
Item
Conversion method
Resolution
Performance
R-2R method
8 bits
Analog output pin
2 channels
Data bus low-order bits
D-A register0 (8)
(Address 03D816
)
D-A0 output enable bit
P97/DA0/CLKOUT/DIMOUT
R-2R resistor ladder
D-A register1 (8)
(Address 03DA16
D-A1 output enable bit
P9 /DA1/SCLK22
)
6
R-2R resistor ladder
Figure JB-1. Block diagram of D-A converter
124
Mitsubishi microcomputers
M30218 Group
D-A converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D-A control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
03DC16
When reset
0016
Bit symbol
DA0E
Bit name
Function
R W
0 : Output disabled
1 : Output enabled
D-A0 output enable bit
D-A1 output enable bit
0 : Output disabled
1 : Output enabled
DA1E
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
D-A register
b7
Symbol
DAi (i = 0,1)
Address
03D816 03DA16
When reset
Indeterminate
b0
,
Function
R W
Output value of D-A conversion
Figure JB-2. D-A control register
D-A0 output enable bit
"0"
R
R
R
R
R
R
R
2R
DA0
"1"
2R
MSB
2R
2R
2R
2R
2R
2R
2R
LSB
D-A0 register0
AVSS
REF
V
Note 1: The above diagram shows an instance in which the D-A register is assigned 2A16
.
Note 2: The same circuit as this is also used for D-A1.
Note 3: To reduce the current consumption when the D-A converter is not used, set the D-A output enable bit to 0 and set the D-A register to 0016
so that no current flows in the resistors Rs and 2Rs.
Figure JB-3. D-A converter equivalent circuit
125
Mitsubishi microcomputers
M30218 Group
CRC Calculation Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
CRC Calculation Circuit
The Cyclic Redundancy Check (CRC) calculation circuit detects an error in data blocks. The microcom-
16
12
5
puter uses a generator polynomial of CRC_CCITT (X + X + X + 1) to generate CRC code.
The CRC code is a 16-bit code generated for a block of a given data length in multiples of 8 bits. The CRC
code is set in a CRC data register each time one byte of data is transferred to a CRC input register after
writing an initial value into the CRC data register. Generation of CRC code for one byte of data is com-
pleted in two machine cycles.
Figure UC-1 shows the block diagram of the CRC circuit. Figure UC-2 shows the CRC-related registers.
Figure UC-3 shows the calculation example using the CRC calculation circuit
Data bus high-order bits
Data bus low-order bits
Eight low-order bits
Eight high-order bits
CRC data register (16)
(Addresses 03BD16, 03BC16
)
CRC code generating circt
x
16 + x12 + x5 + 1
CRC input register (8) (Address 03BE16
)
Figure UC-1. Block diagram of CRC circuit
CRC data register
(b15)
b7
(b8)
b0 b7
Symbol
CRCD
Address
03BD16, 03BC16
When reset
Indeterminate
b0
Values that
can be set
Function
R W
CRC calculation result output register
000016 to FFFF16
CRC input register
b7
b0
Symbo
CRCIN
Address
03BE16
When reset
Indeterminate
Values that
can be set
Function
R W
Data input register
0016 to FF16
Figure UC-2. CRC-related registers
126
Mitsubishi microcomputers
M30218 Group
CRC Calculation Circuit
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
b15
b0
b0
CRC data register CRCD
[03BD16, 03BC16
(1) Setting 000016
(2) Setting 0116
]
b7
CRC input register
2 cycles
CRCIN
[03BE16
]
After CRC calculation is complete
b15
b0
CRC data register
Stores CRC code
CRCD
[03BD16, 03BC16
118916
]
The code resulting from sending 0116 in LSB first mode is (1000 0000). Thus the CRC code in the generating polynomial,
16
12
5
16
(X + X + X + 1), becomes the remainder resulting from dividing (1000 0000) X by (1 0001 0000 0010 0001) in
conformity with the modulo-2 operation.
LSB
MSB
Modulo-2 operation is
operation that complies
with the law given below.
1000 1000
1 0001 0000 0010 0001
1000 0000 0000 0000 0000 0000
1000 1000 0001 0000 1
1000 0001 0000 1000 0
1000 1000 0001 0000 1
1001 0001 1000 1000
LSB
0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0
-1 = 1
MSB
9
8
1
1
Thus the CRC code becomes (1001 0001 1000 1000). Since the operation is in LSB first mode, the (1001 0001 1000 1000)
corresponds to 118916 in hexadecimal notation. If the CRC operation in MSB first mode is necessary in the CRC operation
circuit built in the M16C, switch between the LSB side and the MSB side of the input-holding bits, and carry out the CRC
operation. Also switch between the MSB and LSB of the result as stored in CRC data.
b7
b0
CRC input register
CRCIN
[03BE16
(3) Setting 2316
]
After CRC calculation is complete
b15
b0
CRC data register
Stores CRC code
CRCD
[03BD16, 03BC16
0A4116
]
Figure UC-3. Calculation example using the CRC calculation circuit
127
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Programmable I/O Ports
There are 48 programmable I/O ports: P3, P4 and P7 to P10. 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.
P3 and P40 to P43 are high-breakdown-voltage, P-channel open drain outputs, and have no built-in pull-
down resistance.
Figures UA-1, UA-2 show the programmable I/O ports.
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 con-
verter), 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 UA-3 shows the direction registers.
These registers are used to choose the direction of the programmable I/O ports. Each bit in these regis-
ters corresponds one for one to each I/O pin.
(2) Port registers
Figure UA-4 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.
(3) Pull-up control registers
Figure UA-5 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.
Note: P3, P40 to P43 have no built-in pull-up resistance, because of these pin's are high-breakdown-
voltage, P-channel open drain outputs.
Exclusive High-breakdown-voltage Output Ports
There are 40 exclusive output Ports: P0 to P2, P5 and P6.
All ports have structure of high-breakdown-voltage P-channel open drain output. Exclusive output ports
except P2 have built-in pull-down resistance.
Figure UA-1 shows the configuration of the exclusive high-breakdown-voltage output ports.
128
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
P0
P5
0
0
to P0
to P5
7
, P1
, P6
0
0
to P1
to P6
7
,
,
7
7
Output
(inside dotted-line included)
P2 to P2
(inside dotted-line not included)
Data bus
Port latch
0
7
VEE
P30 to P37, P40 to P43
Direction register
“1”
output
Data bus
Port latch
Pull-up selection
P7
(inside dotted-line included)
P8
(inside dotted-line not included)
0 to P72, P80 to P85, P87, P93
Direction register
6
Port latch
Data bus
Input to respective peripheral functions
Pull-up selection
P44, P92,P94
Direction register
“1”
output
Data bus
Port latch
Figure UA-1. Programmable I/O ports (1)
129
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up selection
Direction register
P4
P9
5
0
to P4
7, P73 to P77
, P9 , P9
1
5
“1”
output
Data bus
Port latch
Input to respective peripheral functions
Pull-up selection
Direction register
P100 to P107
Data bus
Port latch
Analog input
Pull-up selection
P9
(inside dotted-line included)
P9
(inside dotted-line not included)
6
Direction register
“1”
7
output
Data
bus
Port latch
Analog output
D-A output enabled
Input to respective peripheral functions
Figure UA-2. Programmable I/O ports (2)
130
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port Pi direction register
Symbol
Address
When reset
b7 b6 b5 b4 b3 b2 b1 b0
PDi (i = 3 to 10, except 5, 6) 03E716, 03EA16, 03EF16
03F216, 03F316, 03F616
0016
0016
Bit symbol
PDi_0
Bit name
Function
0 : Input mode
(Functions as an input port)
1 : Output mode
R W
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
PDi_1
PDi_2
(Functions as an output port)
PDi_3
PDi_4
(i = 3 to 10 except 5, 6)
PDi_5
PDi_6
PDi_7
Figure UA-3. Direction register
Port Pi register
Symbol
Pi (i = 0 to 10)
Addres
03E016, 03E116, 03E416, 03E516, 03E816
When reset
Indeterminate
b7 b6 b5 b4 b3 b2 b1 b0
03E916, 03EC16, 03ED16, 03F016, 03F116, 03F416 Indeterminate
Bit symbol
Bit name
Function
R W
Pi_0
Pi_1
Pi_2
Pi_3
Pi_4
Pi_5
Pi_6
Pi_7
Port Pi0 register
Port Pi1 register
Port Pi2 register
Port Pi3 register
Port Pi4 register
Port Pi5 register
Port Pi6 register
Port Pi7 register
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
(i = 0 to 10)
Figure UA-4. Port register
131
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
03FD16
When rese
0016
t
Bit symbol
Bit name
Function
R W
Nothing is assigned. In an attempt to write to this bit, write “0”. The value, if
read, turns out to be indeterminate.
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
PU01
P44 to P47 pull-up
1 : Pulled high
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
PU06
P7
0
to P7
3
pull-up
PU07
P7
4
to P7
7
pull-up
1 : Pulled high
Pull-up control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR1
Address
03FE16
When rese
0016
t
R
W
Bit symbol
PU10
Bit name
Function
P8
0
to P8
3
pull-up
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
PU11
P8
4
to P8
7
pull-up
PU12
PU13
P9
P9
0
4
to P9
to P9
3
7
pull-up
pull-up
1 : Pulled high
PU14
PU15
P10
P10
0
4
to P10
to P10
3
7
pull-up
pull-up
Nothing is assigned. In an attempt to write to these bits, write “0”. The value, if
read, turns out to be indeterminate.
Figure UA-5. Pull-up control register
132
Mitsubishi microcomputers
M30218 Group
Programmable I/O Ports
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table UA-1. Example connection of unused pins
Pin name
Connection
Specify output mode, and leave these pins open;
Ports P3, P4, P7 to P10
or specify input mode, and connect to VSS via resistor (pull-down)
Ports P0 to P2, P5, P6
Leave these pins open
Open
X
OUT (Note 1), VEE
Connect to VCC (Note 2)
AVCC
AVSS, VREF
Connect to VSS (Note 2)
Connect to VSS via resistor
CNVSS
Note 1: With external clock input to XIN pin.
Note 2: Connect a bypass capacitor.
Microcomputer
Port P3, P4, P7 to P10
(Input mode)
(Output mode)
Open
Open
Port P0 to P2, P5, P6
(Output mode)
X
OUT
Open
Open
VEE
V
CC
AVCC(Note)
CNVSS
AVSS(Note)
V
REF(Note)
V
SS
Note: Connect a bypass capacitor.
Figure UA-6. Example connection of unused pins
133
Mitsubishi microcomputers
M30218 Group
Pull-down
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Power Dissipation Calculating Method
(Fixed number depending on microcomputer’s standard)
• VOH output fall voltage of high-breakdown port
2 V (max.); | Current value | = at 18 mA
• Resistor value = 68 kΩ (min.)
• Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V X 38 mA = 190 mW
(Fixed number depending on use condition)
• Apply voltage to VEE pin: Vcc – 50 V
• Timing number a; digit number b; segment number c
• Ratio of Toff time corresponding Tdisp time: 1/16
• Turn ON segment number during repeat cycle: d
• All segment number during repeat cycle: e (= a X c)
• Total number of built-in resistor: for digit; f, for segment; g
• Digit pin current value h (mA)
• Segment pin current value i (mA)
(1) Digit pin power dissipation
{h X b X (1–Toff / Tdisp) X voltage} / a
(2) Segment pin power dissipation
{i X d X (1–Toff / Tdisp) X voltage} / a
(3) Pull-down resistor power dissipation (digit)
{power dissipation per 1 digit X (b X f / b) X (1–Toff / Tdisp) } / a
(4) Pull-down resistor power dissipation (segment)
{power dissipation per 1 segment X (d X g / c) X (1–Toff / Tdisp) } / a
(5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 190 mW
(1) + (2)+ (3) + (4) + (5) = X mW
134
Mitsubishi microcomputers
M30218 Group
Pull-down
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Power Dissipation Calculating example 1
Fixed number depending on microcomputer’s standard
• VOH output fall voltage of high-breakdown port
2 V (max.); | Current value | = at 18 mA
• Resistor value 68 kΩ (min.)
• Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V X 38 mA = 190 mW
Fixed number depending on use condition
• Apply voltage to VEE pin: Vcc – 50 V
• Timing number 17; digit number 16; segment number 20
• Ratio of Toff time corresponding Tdisp time: 1/16
• Turn ON segment number during repeat cycle: 31
• All segment number during repeat cycle: 340 (= 17 X 20)
• Total number of built-in resistor: for digit; 16, for segment; 20
• Digit pin current value: 18 (mA)
• Segment pin current value: 3 (mA)
(1) Digit pin power dissipation
{18 X 16 X (1–1/16) X 2} / 17 = 31.77 mW
(2) Segment pin power dissipation
{3 X 31 X (1–1/16) X 2} / 17 = 10.26 mW
(3) Pull-down resistor power dissipation (digit)
2
(50 – 2) /68 X (16 X 16/16) X (1 – 1/16) / 17 = 29.90 mW
(4) Pull-down resistor power dissipation (segment)
2
(50 – 2) /68 X (31 X 20/20) X (1 – 1/16) / 17 = 57.93 mW
(5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 190.00 mW
(1) + (2)+ (3) + (4) + (5) = 319.86 mW
DIG0
DIG1
DIG2
DIG3
DIG13
DIG14
DIG15
1
2
3
14
15
16
17
Timing
number
Repeat cycle
Tscan
Figure S-1. Digit timing waveform (1)
135
Mitsubishi microcomputers
M30218 Group
Pull-down
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Power Dissipation Calculating example 2(when 2 or more digit is turned ON at same time)
Fixed number depending on microcomputer’s standard
• VOH output fall voltage of high-breakdown port
2 V (max.); | Current value | = at 18 mA
• Resistor value 68 kΩ (min.)
• Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V X 38 mA = 190 mW
Fixed number depending on use condition
• Apply voltage to VEE pin: Vcc – 50 V
• Timing number 11; digit number 12; segment number 24
• Ratio of Toff time corresponding Tdisp time: 1/16
• Turn ON segment number during repeat cycle: 114
• All segment number during repeat cycle: 264 (= 11 X 24)
• Total number of built-in resistor: for digit; 10, for segment; 22
• Digit pin current value: 18 (mA)
• Segment pin current value: 3 (mA)
(1) Digit pin power dissipation
{18 X 12 X (1–1 / 16) X 2} / 11 = 36.82 mW
(2) Segment pin power dissipation
{3 X 114 X (1–1 / 16) X 2} / 11 = 58.30 mW
(3) Pull-down resistor power dissipation (digit)
2
(50– 2) / 68 X (12 X 10 / 12) X (1 – 1 / 16) / 11 = 28.88 mW
(4) Pull-down resistor power dissipation (segment)
2
(50 – 2) / 68 X (114 X 22 / 24) X (1 – 1 / 16) / 11 = 301.77 mW
(5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 190.00 mW
(1) + (2)+ (3) + (4) + (5) = 615.77 mW (There is a limit of use temperature)
DIG0
DIG1
DIG2
DIG3
DIG4
DIG5
DIG6
DIG7
DIG8
DIG9
1
2
3
4
5
6
7
8
9
10
11
Timing
number
Repeat cycle
Tscan
Figure S-2. Digit timing waveform (2)
136
Mitsubishi microcomputers
M30218 Group
Pull-down
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Power Dissipation Calculating example 3
(when 2 or more digit is turned ON at same time, and used Toff invalid function)
Fixed number depending on microcomputer’s standard
• VOH output fall voltage of high-breakdown port 2 V (max.); | Current value | = at 18 mA
• Resistor value 68 kΩ (min.)
• Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V X 38 mA = 190 mW
Fixed number depending on use condition
• Apply voltage to VEE pin: Vcc – 50 V
• Timing number 11; digit number 12; segment number 24
• Ratio of Toff time corresponding Tdisp time: 1/16
• Turn ON segment number during repeat cycle: 114 ( for Toff invalid waveform;50)
• All segment number during repeat cycle: 264 (= 11 X 24)
• Total number of built-in resistor: for digit; 10, for segment; 22
• Digit pin current value: 18 (mA)
• Segment pin current value: 3 (mA)
(1) Digit pin power dissipation
[{18 X 10 X (1–1/16) X 2} + {18 X 2 X 2}] / 11 = 37.23 mW
(2) Segment pin power dissipation
[{3 X 64 X (1–1/16) X 2} + {3 X 50 X 2}] / 11 = 60.00 mW
(3) Pull-down resistor power dissipation (digit)
2
2
[{(50– 2) / 68 X (10 X 10 / 12) X (1 – 1 / 16)} + {(50– 2) / 68 X (2 X 10 / 12) } ] /11 = 29.20 mW
(4) Pull-down resistor power dissipation (segment)
2
2
[{(50– 2) / 68 X (64 X 22 / 24) X (1 – 1 / 16)} + {(50– 2) / 68 X (50 X 22 / 24) } ] / 11 = 310.59 mW
(5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 190.00 mW
(1) + (2)+ (3) + (4) + (5) = 627.02 mW (There is a limit of use temperature)
DIG0
DIG1
DIG2
DIG3
DIG4
DIG5
DIG6
DIG7
DIG8
DIG9
1
2
3
4
5
6
7
8
9
10
11
Timing
number
Repeat cycle
Tscan
Figure S-3. Digit timing waveform (3)
137
Mitsubishi microcomputers
M30218 Group
Electrical characteristics
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table Z-1. Absolute maximum ratings
Symbol
Vcc
Parameter
Condition
Standard
Unit
V
- 0.3 to 6.5
Supply voltage
AVcc
V
V
Analog supply voltage
- 0.3 to 6.5
V
EE
Pull-down supply voltage
Vcc - 50 to Vcc+0.3V
V
I
RESET
P4 to P47, P7
P9 to P97, P10
, CNVss,
Input voltage
- 0.3 to Vcc+0.3
(Note)
4
0
to P77, P8
0 to P107,
0
0
to P87,
V
0
V
REF, XIN
Input voltage
V
I
P30
to P37, P4
0
to P4
3
Vcc - 50 to Vcc+0.3
Vcc - 50 to Vcc+0.3
V
V
Output voltage
V
V
O
O
P0
P3
P6
0
to P07, P1
0
to P17, P2
to P27,
to P57,
0
to P37, P4
0
to P43, P5
0
0
to P6
7
Output voltage
P4
P9
4
to P47, P7
0
to P77, P8
0
to P87,
V
0
to P97, P10
0
to P107,
-0.3 to Vcc+0.3
750
XOUT
P
d
Ta=-20 to 60
Ta=60 to 85
C
C
Power
mW
dissipation
mW
C
750-12 X (Ta-60)
-20 to 85
T
opr
Operating ambient temperature
Storage temperature
T
stg
C
-40 to 150
Note 1: When writing to flash ,only CNVss is –0.3 to 13 (V) .
Table Z-2. Recommended operating conditions (referenced to VCC = 2.7V to 5.5V at Ta = – 20 to
85oC unless otherwise specified) (Note)
Standard
Typ.
Unit
Parameter
Symbol
Min
2.7(Note1)
Max.
Supply voltage
5.5
5.0
Vcc
V
V
V
V
Analog supply voltage
Supply voltage
Vcc
0
AVcc
Vss
AVss
0
Analog supply voltage
Pull-down supply voltage
HIGH input voltage
Vcc-48
0.8Vcc
V
EE
Vcc
Vcc
V
V
P7
X
0
to P77, P8
0
to P87, P9
0
to P97, P10
0
to P107,
to P107,
V
IH
IN, RESET
,
CNVSS
0.50Vcc
0.52Vcc
V
V
IH
IH
Vcc
Vcc
V
V
HIGH input voltage
HIGH input voltage
P4
P3
P7
IN, RESET
P3 to P37, P4
P4 to P4
4
to P4
to P37, P4
to P77, P8
CNVSS
to P4
7
0
0
to P4
3
0
0
to P87, P9
0
to P97, P10
0
0
0.2Vcc
LOW input voltage
V IL
V
X
,
V IL
V IL
LOW input voltage
LOW input voltage
0
0
3
V
V
0
0
0.16Vcc
0.16Vcc
4
7
Note: VCC = 4.0V to 5.5V in flash memory version.
138
Mitsubishi microcomputers
M30218 Group
Electrical characteristics
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table Z-3. Recommended operating conditions (referenced to VCC = 2.7V to 5.5V at Ta = – 20 to
85oC unless otherwise specified) (Note 6)
Standard
Typ.
Symbol
IOH (peak)
Parameter
Unit
mA
Min
Max.
-240
HIGH total peak output
current (Note 1)
P0
P1
P4
P8
P4
P8
P0
P1
P4
P8
P4
P8
0
0
4
6
4
to P0
to P1
to P4
7
7
7
, P5
, P2
, P7
0
0
0
to P5
to P2
to P7
7
7
7
, P6
, P3
, P8
0
0
0
to P6
to P3
to P8
7
7
5
IOH (peak)
IOH (peak)
IOH (peak)
IOL (peak)
IOL (peak)
IOH (avg)
IOH (avg)
IOH (avg)
IOH (avg)
IOL (avg)
IOL (avg)
HIGH total peak output
current (Note 1)
, P40 to P43
-240
-80
-80
80
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
HIGH total peak output
current (Note 1)
HIGH total peak output
current (Note 1)
, P87, P90 to P97, P100 to P107
LOW total peak output
current (Note 1)
to P4
7
, P7
0
to P7
7
, P8
0
to P85
LOW total peak output
current (Note 1)
6
0
, P8
7
, P9
0
to P9
7
, P10
0
to P107
80
HIGH total average
output current (Note 1)
to P0
to P1
to P4
7
7
7
, P5
, P2
, P7
0
0
0
to P5
to P2
to P7
7
7
7
, P6
0
to P6
to P3
to P8
7
-120
-120
-40
-40
40
HIGH total average
output current (Note 1)
0
4
6
4
6
, P3
0
0
7, P40 to P43
HIGH total average
output current (Note 1)
, P8
5
HIGH total average
output current (Note 1)
, P87, P90 to P97, P100 to P107
LOW total average
output current (Note 1)
to P4
7
, P7
0
to P7
7
, P8
0
to P85
LOW total average
output current (Note 1)
, P8
7
, P9
0
to P9
7
, P10
0
to P107
40
P0
0
to P0
7
, P1
0
to P1
to P5
to P7
to P10
7
, P2
, P6
, P8
0
to P2
7
,P3
0
to P3
7
,
,
HIGH peak output
current (Note 2)
IOH (peak)
IOH (peak)
-40
-10
10
mA
mA
mA
P4
0
to P4
3
, P5
, P7
, P10
, P7
, P10
, P1
, P5
, P7
, P10
, P7
, P10
0
7
0
to P6
7
P4
P9
4
0
to P4
to P9
7
7
0
7
0
0
0
to P8
to P8
to P2
7
7
7
HIGH peak output
current (Note 2)
0
7
P4
P9
4
0
to P4
to P9
7
7
0
to P7
7
, P8
LOW peak output
current (Note 2)
IOL (peak)
IOH (avg)
0
to P10
7
HIGH average output
current (Note 3)
P0
0
to P0
7
0
to P1
7
, P2
,P30 to P37
-18
-5
mA
mA
P4
0
to P4
3
0
to P5
to P7
to P10
to P7 , P8
to P10
7, P6
0
to P6
7
HIGH average output
current (Note 3)
P4
P9
P4
P9
4
to P4
to P9
to P4
to P9
7
0
7
, P8
0
to P8
7
IOH (avg)
IOL (avg)
0
4
7
7
0
7
LOW average output
current (Note 3)
0
7
0
to P8
7
5
10
mA
0
7
0
7
Vcc=4.0V to 5.5V
Vcc=2.7V to 4.0V
0
0
MHz
MHz
Main clock input oscillation frequency (Note 4, 7)
Sub clock oscillation frequency (Note 4, 5)
f (XIN
)
5 X Vcc-10
50
kHz
32.768
f (XcIN
)
Note 1: The total output current is the sum of all the currents through the applicable ports. The total
average value measured over 100ms. The total peak current is the peak of all the currents.
Note 2: The peak output current is the peak current flowing in each port.
Note 3: The average output current in an average value measured over 100ms.
Note 4: When the oscillating frequency has a duty cycle of 50 %.
Note 5: When using the microcomputer in low-speed mode, set the sub-clock input oscillation frequency
on condition that f(XCIN) < f(XIN) / 3.
Note 6: VCC=4.0V to 5.5V in flash memory version.
Note 7: Relationship between main clock oscillation frequency and supply voltage.
Main clock input oscillation frequency
(No wait)
10.0
5 X VCC-10.000MH
Z
3.5
0.0
2.7
4.0
5.5
Flash memory version
(BCLK: no division)
Supply voltage[V]
139
Mitsubishi microcomputers
M30218 Group
Electrical characteristics (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=5V
Table Z-4. Electrical characteristics (referenced to VCC = 5V, VSS = 0V at Ta = 25oC,
f(XIN) =10MH
Z
unless otherwise specified)
Standard
Min. Typ. Max.
Symbol
Parameter
Measuring condition
Unit
P0
0
to P0
to P3
7
,P1
0
to P1
7
,P2
0
to P2
to P5
7
,
HIGH output
voltage
3.5
4.5
3.0
I
I
OH= - 18mA
OH= - 5mA
P3
P6
P4
P9
0
7,P4
0
to P4
3
,P5
0
7,
VOH
V
0
to P6
7
4
to P4
7
,P7
0
to P7
7,P80 to P87,
HIGH output
voltage
V
V
V
OH
IOH= - 5mA
0
to P9
7
,P10
0
to P107
I
I
OH= - 1mA
HIGH POWER
LOW POWER
3.0
3.0
HIGH output
voltage
X
OUT
V
OH
OL
OH= - 0.5mA
LOW output
voltage
P4
P9
4
to P4
to P9
7
,P7
0
to P77,P80 to P87,
V
I
OL=5mA
2.0
V
V
0
7,P10
0
to P107
HIGH POWER
LOW POWER
I
I
OL=1mA
2.0
2.0
VOL
LOW output
voltage
XOUT
OL=0.5mA
Hysteresis
TA0IN to TA4IN,TB0IN to TB2IN
INT to INT , CTS , CTS
CLK ,CLK ,SRDY2IN,SBSY2IN,
,
0
5
0
1,
V
T+-
V
T-
T-
0.2
0.2
0.8
V
0
1
SIN2,SCLK21,SCLK22,RxD0,
RxD1
VT+-
V
Hysteresis
1.8
5.0
V
RESET
HIGH input
current
P4
P9
IN, RESET, CNVss
4
to P4
7
,P7
0
to P7
7
,P8
0
to P8
7
,
,
I
IH
VI=5V
0
to P9
7
,P10
0
to P107,
µA
µA
X
P3 to P3 ,P4 to P43(Note 1)
0
7
0
I
IH
5.0
VI=5V
P4
P9
IN, RESET, CNVss
4
to P4
7
,P7
0
to P7
7,P80 to P8
7
LOW input
current
I
IL
V
I
=0V
=0V
=0V
- 5.0
µA
µA
0
to P9
7
,P10
0
to P107,
X
P3 to P3 ,P4 to P4
0
7
0
3(Note1)
- 5.0
I
IL
VI
RPULLUP
Pull-up
resistance
P4
P8
4
0
to P4
to P8
7
,P7
0
0
to P7
7
,
7,P9
to P9
7
,
VI
30.0 50.0 167.0
kΩ
kΩ
P100 to P107
RPULLD
Pull-down
resistance
P0
P5
0
0
to P0
to P5
7
,P1
0
0
to P1
7
,
VEE=VCC - 48V,VOL=VCC
68
80
120
- 10
7,P6
to P6
7
Output transistors “off”
Output leak
current
I
LEAK
P0
P2
P4
P6
0
0
0
0
to P0
to P2
to P4
to P6
7,P1
7,P3
4,P5
7
0
0
0
to P1
to P3
to P5
7
,
,
,
VEE=VCC - 48V,VOL=VCC - 48V
7
7
Output transistors “off”
µA
R
fXIN
Feedback resistance XIN
1.0
6.0
MΩ
MΩ
V
RfXCIN
Feedback resistance XCIN
RAM retention voltage
VRAM
When clock is stopped
2.0
The output
pins are open
and other
f(XIN)=10MHz
19.0
4.2
38.0
mA
mA
Square wave, no division
f(XIN)=10MHz
Square wave, 8 division
pins are VSS
f(XCIN)=32kHz
90.0
4.0
µA
µA
Square wave (Note2)
Icc
Power supply current (Note 3)
f(XCIN)=32kHz
When a WAIT instruction is executed
(Note2)
C
Ta=25
when clock is stopped
1.0
µA
C
20.0
Ta=85
when clock is stopped
Note 1: Except when reading ports P3, P40 to P43.
Note 2: Fixed XCIN-XCOUT drive capacity select bit to “HIGH” and XIN pin to “H” level.
Note 3: This contains an electric current to flow into AVCC pin.
140
Mitsubishi microcomputers
M30218 Group
Electrical characteristics (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=5V
Table Z-5. A-D conversion characteristics (referenced to VCC = AVCC = VREF = 5V, Vss = AVSS = 0V
at Ta = 25oC, f(XIN) = 10MH
unless otherwise specified)
Z
Standard
Min. Typ. Max.
10 Bits
Symbol
Parameter
Resolution
Measuring condition
Unit
V
REF
=
V
CC
Sample & hold function not available
Absolute
accuracy
V
REF = VCC = 5V
REF =VCC
AN0 to AN7 input
LSB
LSB
LSB
±3
Sample & hold function available(10bit)
V
= 5V
±3
Sample & hold function available(8bit)
V
REF = VCC = 5V
REF CC
±2
R
LADDER
Ladder resistance
Conversion time(10bit)
Conversion time(8bit)
Sampling time
V
=
V
10
3.3
2.8
0.3
40
kΩ
µs
t
t
t
CONV
CONV
µs
µs
V
SAMP
V
V
REF
IA
2
0
V
CC
Reference voltage
V
REF
V
Analog input voltage
Table Z-6. D-A conversion characteristics (referenced to VCC = 5V, VSS = AVSS = 0V, VREF = 5V
at Ta = 25oC, f(XIN) = 10MH
Z
unless otherwise specified)
Standard
Typ. Max.
Symbol
Parameter
Measuring condition
Unit
Min.
Bits
%
Resolution
Absolute accuracy
Setup time
Output resistance
Reference power supply input current
8
1.0
3
t
su
µs
kΩ
mA
R
O
4
10
20
1.5
I
VREF
(
Note)
Note: This applies when using one D-A converter, with the D-A register for the unused D-A converter set to
“0016”.
The A-D converter's ladder resistance is not included.
Also, when the Vref is unconnected at the A-D control register, IVREF is sent.
141
Mitsubishi microcomputers
M30218 Group
Timing (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-7. External clock input
Standard
Symbol
Parameter
Unit
Min.
100
40
Max.
tc
ns
ns
ns
ns
ns
External clock input cycle time
tw(H)
tw(L)
tr
External clock input HIGH pulse width
External clock input LOW pulse width
External clock rise time
40
15
15
tf
External clock fall time
Switching characteristics (referenced to VCC = 5V, VSS = 0V at Ta = 25oC unless otherwise
specified)
Table Z-8. High-breakdown voltage p-channel open-drain output port
Standard
Typ.
Measuring condition
Parameter
Unit
ns
Symbol
Min.
Max.
t
r(Pch-strg)
C
L
=100pF
P-channel high-breakdown
voltage output rising time
(Note 1)
VEE=VCC - 43V
55
t
r(Pch-weak)
P-channel high-breakdown
voltage output rising time
(Note 2)
C
L
=100pF
1.8
µs
VEE=VCC - 43V
Note 1: When bit 7 of the FLDC mode register (address 035016) is at “0”.
Note 2: When bit 7 of the FLDC mode register (address 035016) is at “1”.
P0, P1, P2, P3,
P40 to P43, P5, P6
P-channel high-
breakdown
voltage output
port (Note)
C
L
V
EE
Note: Ports P2, P3, and P40 to P43 need external resistors.
Figure Z-2. Circuit for measuring output switching characteristics
142
Mitsubishi microcomputers
M30218 Group
Timing (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-9. Timer A input (counter input in event counter mode)
Standard
Symbol
Parameter
Unit
Min.
100
40
Max.
ns
ns
ns
t
c(TA)
TAiIN input cycle time
t
w(TAH)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
w(TAL)
40
Table Z-10. Timer A input (gating input in timer mode)
Standard
Symbol
Parameter
Unit
Min.
400
Max.
ns
ns
ns
t
c(TA)
TAiIN input cycle time
t
w(TAH)
200
200
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
w(TAL)
Table Z-11. Timer A input (external trigger input in one-shot timer mode)
Standard
Min. Max.
200
Symbol
Parameter
Unit
ns
ns
ns
t
c(TA)
TAiIN input cycle time
t
w(TAH)
100
100
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
w(TAL)
Table Z-12. Timer A input (external trigger input in pulse width modulation mode)
Standard
Symbol
Parameter
Unit
Min.
100
100
Max.
t
w(TAH)
ns
ns
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
w(TAL)
Table Z-13. Timer A input (up/down input in event counter mode)
Standard
Symbol
Parameter
Unit
Min.
2000
1000
1000
400
Max.
t
c(UP)
ns
ns
ns
ns
ns
TAiOUT input cycle time
t
w(UPH)
w(UPL)
TAiOUT input HIGH pulse width
t
TAiOUT input LOW pulse width
TAiOUT input setup time
TAiOUT input hold time
t
su(UP-TIN)
t
h(TIN-UP)
400
143
Mitsubishi microcomputers
M30218 Group
Timing (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=5V
Timing requirements (referenced to VCC = 5V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-14. Timer B input (counter input in event counter mode)
Standard
Symbol
tc(TB)
Parameter
Unit
Min.
100
Max.
ns
ns
ns
ns
ns
ns
TBiIN input cycle time (counted on one edge)
tw(TBH)
tw(TBL)
tc(TB)
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)
40
40
200
80
tw(TBH)
tw(TBL)
80
Table Z-15. Timer B input (pulse period measurement mode)
Standard
Symbol
tc(TB)
Parameter
Unit
Min.
400
200
200
Max.
TBiIN input cycle time
ns
ns
ns
tw(TBH)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
tw(TBL)
Table Z-16. Timer B input (pulse width measurement mode)
Standard
Symbol
Parameter
Unit
Min.
400
200
200
Max.
tc(TB)
tw(TBH)
tw(TBL)
ns
ns
ns
TBiIN input cycle time
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
Table Z-17. Serial I/O
Standard
Symbol
tc(CK)
Parameter
Unit
Min.
200
100
100
Max.
ns
ns
ns
ns
ns
ns
ns
CLKi input cycle time
tw(CKH)
tw(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
CLKi input HIGH pulse width
CLKi input LOW pulse width
TxDi output delay time
TxDi hold time
80
0
30
90
RxDi input setup time
RxDi input hold time
_______
Table Z-18. External interrupt INTi inputs
Standard
Symbol
Parameter
Unit
Min.
250
250
Max.
tw(INH)
tw(INL)
ns
ns
INTi input HIGH pulse width
INTi input LOW pulse width
Table Z-19. Automatic transfer serial I/O
Standard
Symbol
Parameter
Unit
Min.
0.95
400
Max.
tc(SCLK)
µs
ns
ns
ns
ns
Serial I/O clock input cycle time
Serial I/O clock input HIGH pulse width
Serial I/O clock input LOW pulse width
Serial I/O input setup time
twH(SCLK)
twL(SCLK)
tsu(SCLK-SIN)
th(SCLK-SIN)
400
200
200
Serial I/O input hold time
144
Mitsubishi microcomputers
M30218 Group
Timing (VCC=5V)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
tc(TA)
VCC=5V
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
t
h(TIN-UP)
tsu(UP-TIN)
(When count on falling edge is selected)
TAiIN input
(When count on rising edge is selected)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(CK)
tw(CKH)
CLK
i
tw(CKL)
th(C-Q)
TxD
i
td(C-Q)
tsu(D-C)
th(C-D)
RxD
i
t
w(INL)
INTi input
t
w(INH)
t
C(SCLK)
tf(SCLK)
t
r
tWL(SCLK)
tWH(SCLK)
S
CLK
0.8VCC
0.2VCC
t
SU(SiN-SCLK)
t
h(SCLK-SiN)
0.8VCC
0.2VCC
S
IN
td(SCLK-SOUT)
tV(SCLK-SOUT)
S
OUT
145
Mitsubishi microcomputers
M30218 Group
Electrical characteristics(VCC=3V, only mask ROM version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=3V
Table Z-20. Electrical characteristics (referenced to VCC = 3V, VSS = 0V at Ta = 25oC,
f(XIN) =5MH unless otherwise specified)
Z
Standard
Min. Typ. Max.
Symbol
Parameter
Measuring condition
Unit
P00 to P07,P10 to P17,P20 to P27,
P30 to P37,P40 to P43,P50 to P57,
P60 to P67
HIGH output
voltage
1.5
2.5
2.5
IOH= - 18mA
IOH= - 5mA
VOH
V
P44 to P47,P70 to P77,P80 to P87,
P90 to P97,P100 to P107
HIGH output
voltage
V
V
VOH
IOH= - 1mA
IOH= - 0.1mA
HIGH POWER
XOUT
2.5
2.5
HIGH output
voltage
VOH
VOL
VOL
LOW POWER
IOH= - 50µA
LOW output
voltage
P44 to P47,P70 to P77,P80 to P87,
P90 to P97,P100 to P107
IOL=1mA
0.5
V
V
HIGH POWER
IOL=0.1mA
0.5
0.5
LOW output XOUT
voltage
LOW POWER
IOL=50µA
Hysteresis
TA0IN to TA4IN,TB0IN to TB2IN,
INT0 to INT5, CTS0, CTS1,
CLK0,CLK1,SRDY2IN,SBSY2IN,
0.2
0.2
0.8
V
V
VT+-VT-
SIN2,SCLK21,SCLK22
RTS0,RTS1
VT+-VT-
IIH
Hysteresis
1.8
4.0
RESET
HIGH input
current
P44 to P47,P70 to P77,P80 to P87,
P90 to P97,P100 to P107,
XIN, RESET, CNVss
VI=3V
µA
µA
P30 to P37,P40 to P43(Note 1)
IIH
IIL
4.0
VI=3V
VI=0V
P44 to P47,P70 to P77,P80 to P87,
P90 to P97,P100 to P107,
XIN, RESET, CNVss
LOW input
current
- 4.0
µA
µA
P30 to P37,P40 to P43(Note 1)
- 4.0
IIL
VI=0V
VI=0V
RPULLUP
Pull-up
resistance
P44 to P47,P70 to P77,
P80 to P87,P90 to P97,
P100 to P107
66.0 120.0 500.0
kΩ
kΩ
RPULLD
ILEAK
Pull-down
resistance
P00 to P07,P10 to P17,
P50 to P57,P60 to P67
VEE=VCC - 48V,VOL=VCC
Output transistors “off”
68
80
120
- 10
Output leak
current
P00 to P07,P10 to P17,
P20 to P27,P30 to P37,
P40 to P44,P50 to P57,
P60 to P67
VEE=VCC - 48V,VOL=VCC - 48V
Output transistors “off”
µA
RfXIN
Feedback resistance XIN
Feedback resistance XCIN
RAM retention voltage
3.0
MΩ
MΩ
V
RfXCIN
VRAM
10.0
When clock is stopped
2.0
f(XIN)=5MHz
The output
pins are open
and other
6.0
1.6
15.0
mA
mA
µA
Square wave, no division
f(XIN)=5MHz
pins are VSS
Square wave, 8 division
f(XCIN)=32kHz
Square wave
50.0
f(XCIN)=32kHz
When a WAITinstruction
is executed.
Oscillation capacity High (Note2)
2.8
0.9
Icc
Power supply current (Note 3)
µA
µA
f(XCIN)=32kHz
When a WAIT instruction
is executed.
Oscillation capacity Low (Note2)
C
Ta=25
when clock is stopped
1.0
µA
C
Ta=85
when clock is stopped
20.0
Note 1: Except when reading ports P3, P40 to P43.
Note 2: With one timer operated using fC32.
Note 3: This contains an electric current to flow into AVCC pin.
146
nt
Mitsubishi microcomputers
M30218 Group
Electrical characteristics(VCC=3V, only mask ROM version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=3V
Table Z-21. A-D conversion characteristics (referenced to VCC = AVCC = VREF = 3V, Vss = AVSS = 0V
at Ta = 25oC, f(XIN) = 5MH
unless otherwise specified)
Z
Standard
Symbol
Parameter
Measuring condition
Unit
Min. Typ. Max
V
REF = VCC
REF = VCC = 3V, φAD = f(XIN)/2
VREF = VCC
10
Bits
Resolution
Absolute accuracy Sample & hold function not available (8 bit)
V
LSB
±2
R
LADDER
40
Ladder resistance
Conversion time(8bit)
Reference voltage
Analog input voltage
10
14.0
2.7
0
kΩ
µs
V
tCONV
V
REF
IA
V
CC
V
V
REF
V
Table Z-22. D-A conversion characteristics (referenced to VCC = 3V, VSS = AVSS = 0V, VREF = 3V
at Ta = 25oC, f(XIN) = 5MH
unless otherwise specified)
Z
Standard
Min. Typ. Max
Symbol
Parameter
Measuring condition
Unit
Resolution
Absolute accuracy
Setup time
8
1.0
3
Bits
%
t
su
µs
R
O
Output resistance
Reference power supply input current
4
10
20
1.0
kΩ
mA
I
VREF
(Note)
Note: This applies when using one D-A converter, with the D-A register for the unused D-A converter set to “0016”.
The A-D converter's ladder resistance is not included.
Also, when the Vref is unconnected at the A-D control register, IVREF is sent.
147
Mitsubishi microcomputers
M30218 Group
Timing(VCC=3V, only mask ROM version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-23. External clock input
Standard
Symbol
Parameter
Unit
Min.
200
85
Max.
ns
ns
ns
ns
ns
t
c
External clock input cycle time
t
w(H
)
External clock input HIGH pulse width
External clock input LOW pulse width
External clock rise time
t
w(L)
85
t
r
18
18
t
f
External clock fall time
148
Mitsubishi microcomputers
M30218 Group
Timing(VCC=3V, only mask ROM version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-24. Timer A input (counter input in event counter mode)
Standard
Symbol
Parameter
Unit
Min.
150
60
Max.
t
c(TA)
TAiIN input cycle time
ns
ns
ns
t
w(TAH)
w(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
60
Table Z-25. Timer A input (gating input in timer mode)
Standard
Symbol
Parameter
Unit
Min.
600
300
300
Max.
t
c(TA)
TAiIN input cycle time
ns
ns
ns
t
w(TAH)
w(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
Table Z-26. Timer A input (external trigger input in one-shot timer mode)
Standard
Symbol
Parameter
Unit
Min.
300
150
150
Max.
t
c(TA)
TAiIN input cycle time
ns
ns
ns
t
w(TAH)
w(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
t
Table Z-27. Timer A input (external trigger input in pulse width modulation mode)
Standard
Symbol
Parameter
Unit
Min.
150
150
Max.
t
w(TAH)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
ns
ns
t
w(TAL)
Table Z-28. Timer A input (up/down input in event counter mode)
Standard
Symbol
Parameter
Unit
Min.
3000
1500
1500
600
Max.
t
c(UP)
TAiOUT input cycle time
ns
ns
ns
ns
ns
t
w(UPH)
TAiOUT input HIGH pulse width
TAiOUT input LOW pulse width
TAiOUT input setup time
t
w(UPL)
t
su(UP-TIN
)
t
h(TIN-UP)
TAiOUT input hold time
600
149
Mitsubishi microcomputers
M30218 Group
Timing(VCC=3V, only mask ROM version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
VCC=3V
Timing requirements (referenced to VCC = 3V, VSS = 0V at Ta = 25oC unless otherwise specified)
Table Z-29. Timer B input (counter input in event counter mode)
Standard
Symbol
Parameter
Unit
Min.
150
60
Max.
tc(TB)
TBiIN input cycle time (counted on one edge)
ns
ns
ns
ns
ns
ns
t
w(TBH)
w(TBL)
c(TB)
w(TBH)
w(TBL)
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)
t
60
t
300
160
160
t
t
Table Z-30. Timer B input (pulse period measurement mode)
Standard
Symbol
Parameter
Unit
Min.
600
300
300
Max.
t
c(TB)
TBiIN input cycle time
ns
ns
ns
t
w(TBH)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
t
w(TBL)
Table Z-31. Timer B input (pulse width measurement mode)
Standard
Symbol
Parameter
Unit
Min.
600
300
300
Max.
t
c(TB)
TBiIN input cycle time
ns
ns
ns
t
w(TBH)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
t
w(TBL)
Table Z-32. Serial I/O
Standard
Symbol
Parameter
Unit
Min.
300
150
150
Max.
t
c(CK)
w(CKH)
w(CKL)
CLKi input cycle time
CLKi input HIGH pulse width
CLKi input LOW pulse width
TxDi output delay time
TxDi hold time
ns
ns
ns
ns
ns
ns
ns
t
t
t
d(C-Q)
h(C-Q)
su(D-C)
160
t
0
50
90
t
RxDi input setup time
RxDi input hold time
t
h(C-D)
_______
Table Z-33. External interrupt INTi inputs
Standard
Symbol
Parameter
Unit
Min.
380
380
Max.
t
w(INH)
INTi input HIGH pulse width
INTi input LOW pulse width
ns
ns
t
w(INL)
Table Z-34. Automatic transfer serial I/O
Standard
Symbol
Parameter
Unit
Min.
2.0
Max.
t
c(SCLK)
µs
ns
ns
ns
ns
Serial I/O clock input cycle time
Serial I/O clock input HIGH pulse width
Serial I/O clock input LOW pulse width
Serial I/O input setup time
t
wH(SCLK)
wL(SCLK)
su(SCLK-SIN)
h(SCLK-SIN)
1000
1000
400
t
t
t
Serial I/O input hold time
400
150
Mitsubishi microcomputers
M30218 Group
Timing(VCC=3V, only mask ROM version)
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
th(TIN-UP)
tsu(UP-TIN)
(When count on falling edge is selected)
TAiIN input
(When count on rising edge is selected)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(CK)
tw(CKH)
CLK
i
tw(CKL)
th(C-Q)
TxD
i
tsu(D-C)
td(C-Q)
th(C-D)
RxD
i
t
w(INL)
INT
i
input
t
w(INH)
t
C(SCLK)
tf(SCLK)
t
r
tWL(SCLK)
tWH(SCLK)
S
S
CLK
0.8VCC
0.2VCC
t
SU(SiN-SCLK)
t
h(SCLK-SiN)
0.8VCC
0.2VCC
IN
td(SCLK-SOUT)
tV(SCLK-SOUT)
S
OUT
151
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Outline Performance
Table AA-1 shows the outline performance of the M30218 group (flash memory version).
Table AA-1. Outline Performance of the M30218 group (flash memory version)
Item
Performance
4.0V to 5.5 V (f(XIN)=10MHz)
Power supply voltage
V
PP=12V ± 5% (f(XIN)=10MHz)
CC=5V ± 10% (f(XIN)=10MHz)
Program/erase voltage
V
Three modes (parallel I/O, standard serial I/O, CPU
rewrite)
Flash memory operation mode
Erase block
See Figure 1.AA.3.
User ROM area
division
Boot ROM area
One division (3.5 K bytes) (Note)
In units of byte
Program method
Erase method
Collective erase / block erase
Program/erase control by software command
6 commands
Program/erase control method
Number of commands
Program/erase count
100 times
Standard serial I/O mode is supported.
ROM code protect
Note: The boot ROM area contains a standard serial I/O mode control program which is stored in it
when shipped from the factory. This area can be erased and programmed in only parallel I/O
mode.
152
Mitsubishi microcomputers
M30218 Group
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Flash Memory
The M30218 group (flash memory version) contains the NOR type of flash memory that requires a high-
voltage VPP power supply for program/erase operations, in addition to the VCC power supply for device
operation. For this flash memory, three flash memory modes are available in which to read, program, and
erase: parallel I/O and standard serial I/O modes in which the flash memory can be manipulated using a
programmer and a CPU rewrite mode in which the flash memory can be manipulated by the Central Pro-
cessing Unit (CPU). Each mode is detailed in the pages to follow.
In addition to the ordinary user ROM area to store a microcomputer operation control program, the flash
memory has a boot ROM area that is used to store a program to control rewriting in CPU rewrite and
standard serial I/O modes. This boot ROM area has had a standard serial I/O mode control program stored
in it when shipped from the factory. However, the user can write a rewrite control program in this area that
suits the user’s application system. This boot ROM area can be rewritten in only parallel I/O mode.
CPU rewrite mode
Standard serial I/O mode
Microcomputer mode
0000016
Parallel I/O mode
SFR
SFR
SFR
0040016
RAM
RAM
RAM
YYYYY16
DF00016
DFDFF16
E000016
Collective
erasable/
programmable
area
Boot ROM
area
(3.5K bytes)
Boot ROM
area
(3.5K bytes)
Block 3
E800016
F000016
Block 2
Block 1
XXXXX16
FFFFF16
Collective
erasable/
programmable
area
Collective
erasable/
programmable
area
User ROM
area
User ROM
area
User ROM
area
F800016
FFFFF16
Block 0
XXXXX16
E000016
YYYYY16
033FF16
Type No.
M30218FC
Note 1: In CPU rewrite and standard serial I/O modes, the user ROM is the only erasable/programmable area.
Note 2: In parallel I/O mode, the area to be erased/programmed can be selected by the address A17 input.
The user ROM area is selected when this address input is high and the boot ROM area is selected
when this address input is low.
Figure AA-3. Block diagram of flash memory version
153
Mitsubishi microcomputers
M30218 Group
CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
CPU Rewrite Mode
In CPU rewrite mode, the on-chip flash memory can be operated on (read, program, or erase) under control
of the Central Processing Unit (CPU). In CPU rewrite mode, the flash memory can be operated on by
reading or writing to the flash memory control register and flash command register. Figure BB-1, Figure BB-
2 show the flash memory control register, and flash command register respectively.
Also, in CPU rewrite mode, the CNVSS pin is used as the VPP power supply pin. Apply the power supply
voltage, VPPH, from an external source to this pin.
In CPU rewrite mode, only the user ROM area shown in Figure AA-3 can be rewritten; the boot ROM area
cannot be rewritten. Make sure the program and block commands are issued for only the user ROM area.
The control program for CPU rewrite mode can be stored in either user ROM or boot ROM area. In the CPU
rewrite mode, because the flash memory cannot be read from the CPU, the rewrite control program must
be transferred to internal RAM before it can be executed.
Flash memory control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FCON0
Address
03B416
When reset
00100000
2
0
0
R
W
Bit name
CPU rewrite mode
Function
Bit symbol
FCON00
0: CPU rewrite mode is invalid
1: CPU rewrite mode is valid
select bit
This bit can not write. The value, if
read, turns out to be indeterminate.
Reserved bit
CPU rewrite mode
monitor flag
0: CPU rewrite mode is invalid
1: CPU rewrite mode is valid
FCON02
Reserved bit
FCON04
Must always be set to "0".
b6b5b4
Erase / program
area select bit
000: Block 3 program/erase
001: Block 2 program/erase
010: Block 1 program/erase
011: Block 0 program/erase
110: Block 0 to 3 erase
111: Inhibit
FCON05
FCON06
Reserved bit
Must always be set to "0".
Flash memory control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FCON1
Address
03B516
When reset
XXXXXX00
2
0
0
R
W
Bit name
Function
Must always be set to "0".
Bit symbol
Reserved bit
Nothing is assigned. In an attempt to write these bits, write "0". The
value, if read, turns out to be indeterminate.
Figure BB-1. Flash memory control register
Flash command register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FCMD
Address
03B616
When reset
0016
R
W
Function
Writing of software command
<Software command name>
•Read command
<Command code>
"0016
"4016
"
"
•Program command
•Program verify command
•Erase command
•Erase verify command
•Reset command
"C016
"2016" +"2016
"A016
"FF16" +"FF
"
"
"
6
"
Figure BB-2. Flash command register
154
Mitsubishi microcomputers
M30218 Group
CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Microcomputer Mode and Boot Mode
The control program for CPU rewrite mode must be written into the user ROM or boot ROM area in
parallel I/O mode beforehand. (If the control program is written into the boot ROM area, the standard
serial I/O mode becomes unusable.)
See Figure AA-3 for details about the boot ROM area.
Normal microcomputer mode is entered when the microcomputer is reset with pulling CNVSS pin low
(VSS). In this case, the CPU starts operating using the control program in the user ROM area.
When the microcomputer is reset by pulling the P52 pin high (VCC), the CNVSS pin high(VPPH), the CPU
starts operating using the control program in the boot ROM area. This mode is called the “boot” mode.
The control program in the boot ROM area can also be used to rewrite the user ROM area.
CPU rewrite mode operation procedure
The internal flash memory can be operated on to program, read, verify, or erase it while being placed on-
board by writing commands from the CPU to the flash memory control register (addresses 03B416,
03B516) and flash command register (address 03B616). Note that when in CPU rewrite mode, the boot
ROM area cannot be accessed for program, read, verify, or erase operations. Before this can be accom-
plished, a CPU write control program must be written into the boot ROM area in parallel input/output
mode. The following shows a CPU rewrite mode operation procedure.
<Start procedure (Note 1)>
(1) Apply VPPH to the CNVSS/VPP pin and VCC to the port P46 pin for reset release. Or the user can
jump from the user ROM area to the boot ROM area using the JMP instruction and execute the CPU
write control program. In this case, set the CPU write mode select bit of the flash memory control
register to “1” before applying VPPH to the CNVSS/VPP pin.
(2) After transferring the CPU write control program from the boot ROM area to the internal RAM, jump
to this control program in RAM. (The operations described below are controlled by this program.)
(3) Set the CPU rewrite mode select bit to “1”.
(4) Read the CPU rewrite mode monitor flag to see that the CPU rewrite mode is enabled.
(5) Execute operation on the flash memory by writing software commands to the flash command regis-
ter.
Note 1: In addition to the above, various other operations need to be performed, such as for entering the
data to be written to flash memory from an external source (e.g., serial I/O), initializing the ports, and
writing to the watchdog timer.
<Clearing procedure>
(1) Apply VSS to the CNVSS/VPP pin.
(2) Set the CPU rewrite mode select bit to “0”.
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CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Precautions on CPU Rewrite Mode
Described below are the precautions to be observed when rewriting the flash memory in CPU rewrite
mode.
(1) Operation speed
During erase/program mode, set BCLK to one of the following frequencies by changing the divide
ratio:
5 MHz or less when wait bit (bit 7 at address 000516) = 0 (without internal access wait state)
10 MHz or less when wait bit (bit 7 at address 000516) = 1 (with internal access wait state)(Note 1)
(2) Instructions inhibited against use
The instructions listed below cannot be used during CPU rewrite mode because they refer to the
internal data of the flash memory:
UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
(3) Interrupts inhibited against use
No interrupts can be used that look up the fixed vector table in the flash memory area. Maskable
interrupts may be used by setting the interrupt vector table in a location outside the flash memory
area.
Note 1: Internal access wait state can be set in CPU rewrite mode. In this time, the following function is
only used.
• CPU, ROM, RAM, timer, UART, SI/O2(non-automatic transfer), port
In case of setting internal access wait state, refer to the following explain (software wait).
Software wait
A software wait can be inserted by setting the wait bit (bit 7) of the processor mode register 1 (address
000516) (Note 2).
A software wait is inserted in the internal ROM/RAM 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 BCLK cycles. After the microcomputer has been reset, this bit defaults to “0”.
The SFR area is always accessed in two BCLK cycles regardless of the setting of this control bit.
Table DA-1 shows the software wait and bus cycles. Figure DA-6 shows example bus timing when
using software waits.
Note 2: Before attempting to change the contents of the processor mode register 1, set bit 1 of the protect
register (address 000A16) to “1”.
Table DA-1. Software waits and bus cycles
Bus cycle
Area
SFR
Wait bit
Invalid
2 BCLK cycles
1 BCLK cycle
2 BCLK cycles
0
1
Internal
ROM/RAM
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CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
< Internal bus (no wait) >
Bus cycle
BCLK
Write signal
Read signal
Output
Input
Data bus
Address bus
Address
Address
< Internal bus (with wait) >
Bus cycle
BCLK
Write signal
Read signal
Input
Output
Data bus
Address
Address bus
Address
Figure DA-6. Typical bus timings using software wait
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CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Commands
Table BB-1 lists the software commands available with the M30218 group (flash memory version).
When CPU rewrite mode is enabled, write software commands to the flash command register to specify
the operation to erase or program.
The content of each software command is explained below.
Table BB-1. List of Software Commands (CPU Rewrite Mode)
First bus cycle
Second bus cycle
Command
Data
(D to D
Data
to D7)
Mode Address
Mode
Address
0
7)
(D
0
Read
Write
Write
03B616
03B616
0016
4016
Program
Write
Read
Program
address
Program
data
Program verify
03B616
C016
Write
Verify
address
Verify
data
Erase
2016
A016
03B616
03B616
Write
Write
2016
Write
Read
03B616
Erase verify
Verify
address
Verify
data
Reset
FF16
FF16
Write
Write
03B616
03B616
Read Command (0016)
The read mode is entered by writing the command code “0016” to the flash command register in the
first bus cycle. When an address to be read is input in one of the bus cycles that follow, the content of
the specified address is read out at the data bus (D0–D7), 8 bits at a time.
The read mode is retained intact until another command is written.
After reset and after the reset command is executed, the read mode is set.
Program Command (4016)
The program mode is entered by writing the command code “4016” to the flash command register in
the first bus cycle. When the user execute an instruction to write byte data to the desired address (e.g.,
STE instruction) in the second bus cycle, the flash memory control circuit executes the program op-
eration. The program operation requires approximately 20 µs. Wait for 20 µs or more before the user
go to the next processing.
During program operation, the watchdog timer remains idle, with the value “7FFF16” set in it.
Note 1: The write operation is not completed immediately by writing a program command once. The
user must always execute a program-verify command after each program command executed. And if
verification fails, the user need to execute the program command repeatedly until the verification
passes. See Figure BB.3 for an example of a programming flowchart.
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CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Program-verify command (C016)
The program-verify mode is entered by writing the command code “C016” to the flash command
register in the first bus cycle. When the user execute an instruction (e.g., LDE instruction) to read byte
data from the address to be verified (the previously programmed address) in the second bus cycle,
the content that has actually been written to the address is read out from the memory.
The CPU compares this read data with the data that it previously wrote to the address using the
program command. If the compared data do not match, the user need to execute the program and
program-verify operations one more time.
Erase command (2016 + 2016)
The flash memory control circuit executes an erase operation by writing command code “2016” to the
flash command register in the first bus cycle and the same command code to the flash command
register again in the second bus cycle. The erase operation requires approximately 20 ms. Wait for 20
ms or more before the user go to the next processing.
Before this erase command can be performed, all memory locations to be erased must have had data
“0016” written to by using the program and program-verify commands. During erase operation, the
watchdog timer remains idle, with the value “7FFF16 set in it.
Note 1: The erase operation is not completed immediately by writing an erase command once. The
user must always execute an erase-verify command after each erase command executed. And if
verification fails, the user need to execute the erase command repeatedly until the verification passes.
See Figure BB-3 for an example of an erase flowchart.
Erase-verify command (A016)
The erase-verify mode is entered by writing the command code “A016” to the flash command register
in the first bus cycle. When the user execute an instruction to read byte data from the address to be
verified (e.g., LDE instruction) in the second bus cycle, the content of the address is read out.
The CPU must sequentially erase-verify memory contents one address at a time, over the entire area
erased. If any address is encountered whose content is not “FF16” (not erased), the CPU must stop
erase-verify at that point and execute erase and erase-verify operations one more time.
Note 1: If any unerased memory location is encountered during erase-verify operation, be sure to
execute erase and erase-verify operations one more time. In this case, however, the user does not
need to write data “0016” to memory before erasing.
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CPU Rewrite Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Reset command (FF16 + FF16)
The reset command is used to stop the program command or the erase command in the middle of
operation. After writing command code “4016” or “2016” twice to the flash command register, write
command code “FF16” to the flash command register in the first bus cycle and the same command
code to the flash command register again in the second bus cycle. The program command or erase
command is disabled, with the flash memory placed in read mode.
Program
Erase
Start
Start
Address = first location
Loop counter : X=0
All bytes =
"0016"?
YES
NO
Program all bytes =
Write : 4016
Write program command
"0016
"
Address = First address
Loop counter X=0
Write program data/
address
Write : Program data
Duration = 20 µs
Write:2016
Write:2016
Write erase command
Write erase command
Loop counter : X=X+1
Duration = 20ms
Write program verify
command
Write : C016
Loop counter X=X+1
Write erase verify
command/address
Write:A016
Duration = 6 µs
Duration = 6µs
YES
X=25 ?
NO
YES
X=1000 ?
NO
PASS
FAIL
NO
Verify
OK ?
Verify
OK ?
FAIL
NO
Read:
expect value=FF16
Verify
OK?
Verify
OK?
PASS
PASS
FAIL
PASS
FAIL
Last
address ?
Last
address?
Next address ?
Next address
Write:0016
Write read command
PASS
Write read command
FAIL
Write read command
PASS
Write read command
FAIL
Write : 0016
Figure BB-3. Program and erase execution flowchart in the CPU rewrite mode
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pin functions (Flash memory standard serial I/O mode)
Pin
Name
Description
I/O
Apply 5V ± 10 % to Vcc pin and 0 V to Vss pin.
Power input
V
CC,VSS
Apply 12V ± 5 % to this pin.
CNVSS
CNVSS
RESET
I
I
Reset input
Reset input pin. While reset is "L" level, a 20 cycle or longer clock
must be input to XIN pin.
X
IN
OUT
AVCC, AVSS
REF
Connect a ceramic resonator or crystal oscillator between XIN and
XOUT pins. To input an externally generated clock, input it to XIN pin
and open XOUT pin.
Clock input
I
X
Clock output
O
Connect AVSS to Vss and AVcc to Vcc, respectively.
Analog power supply input
Reference voltage input
Output port P0
V
Enter the reference voltage for AD from this pin.
Output exclusive use pin.
I
P0
P1
P2
P3
0
0
0
0
to P0
to P1
to P2
to P3
7
7
7
7
O
O
Output exclusive use pin.
Output port P1
Output exclusive use pin.
Output port P2
O
Input "H" or "L" level signal or open.
Input "H" or "L" level signal or open.
Input port P3
Input port P4
I
I
P4
P4
P4
P4
P4
0
4
5
6
7
to P43
TxD output
RxD input
SCLK input
Serial data output pin.
O
Serial data input pin.
Serial clock input pin.
I
I
O
BUSY output
Output port P5
Output port P6
BUSY signal output pin.
Output exclusive use pin.
Output exclusive use pin.
P5
0
0
to P5
to P6
7
7
O
O
I
P6
Input port P7
Input port P8
Input port P9
Input port P10
Input "H" or "L" level signal or open.
Input "H" or "L" level signal or open.
Input "H" or "L" level signal or open.
Input "H" or "L" level signal or open.
P7
P8
P9
0
0
0
to P7
to P8
to P9
7
7
7
I
I
P100 to P107
I
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mode setup method
Signal
CNVss
RESET
Value
VppH
V
SS
VCC
P6
7
6
5
4
3
/FLD7
/FLD6
/FLD5
/FLD4
/FLD3
81
82
50
49
P2
P2
P2
P2
P3
P3
P3
P3
P3
P3
4
5
6
7
0
1
2
3
4
5
/FLD36
/FLD37
/FLD38
/FLD39
/FLD40
/FLD41
/FLD42
/FLD43
/FLD44
/FLD45
P6
P6
P6
P6
P6
P6
83
84
85
86
87
48
47
46
45
44
2
/FLD2
/FLD1
/FLD0
1
P6
0
88
89
43
42
41
40
39
38
VEE
90
91
P10
P10
P10
P10
7
6
5
4
/AN7
/AN6
/AN5
/AN4
M30218FCFP
P3
P3
P4
6/FLD46
7/FLD47
0/FLD48
92
93
94
95
96
97
98
99
37
36
35
34
33
32
P10
P10
P10
3
2
1
/AN3
/AN2
/AN1
P4
P4
P4
P4
P4
P4
1
2
3
/FLD49
/FLD50
/FLD51
AVSS
/AN0
REF
AVCC
Vss
TxD
4
5
6
/T
/R
/CLK0/FLD54
XD0/FLD52
P100
RxD
XD0/FLD53
V
SCLK
Vcc
100
31
P47/CTS0/RTS0/FLD55
BUSY
Connect oscillator
circuit.
Figure DD-1. Pin connections for serial I/O mode (1)
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Standard Serial I/O Mode
The standard serial I/O mode serially inputs and outputs the software commands, addresses and data
necessary for operating (read, program, erase, etc.) the internal flash memory. It uses a purpose-specific
serial programmer.
The standard serial I/O mode differs from the parallel I/O mode in that the CPU controls operations like
rewriting (uses the CPU rewrite mode) in the flash memory or serial input for rewriting data. The standard
serial I/O mode is started by clearing the reset with VPPH at the CNVss pin. (For the normal microprocessor
mode, set CNVss to “L”.)
This control program is written in the boot ROM area when shipped from Mitsubishi Electric. Therefore, if
the boot ROM area is rewritten in the parallel I/O mode, the standard serial I/O mode cannot be used.
Figures DD-1 shows the pin connections for the standard serial I/O mode. Serial data I/O uses three
UART0 pins: CLK0, RxD0, TxD0, and RTS0 (BUSY).
The CLK0 pin is the transfer clock input pin and it transfers the external transfer clock. The TxD0 pin outputs
the CMOS signal. The RTS0 (BUSY) pin outputs an “L” level when reception setup ends and an “H” level
when the reception operation starts. Transmission and reception data is transferred serially in 8-byte
blocks.
In the standard serial I/O mode, only the user ROM area shown in Figure AA-3 can be rewritten, the boot
ROM area cannot.
The standard serial I/O mode has a 7-byte ID code. When the flash memory is not blank and the ID code
does not match the content of the flash memory, the command sent from the programmer is not accepted.
Function Overview (Standard Serial I/O Mode)
In the standard serial I/O mode, software commands, addresses and data are input and output between
the flash memory and an external device (serial programmer, etc.) using a clock synchronized serial I/O
(UART0) . In reception, the software commands, addresses and program data are synchronized with the
rise of the transfer clock input to the CLK0 pin and input into the flash memory via the RxD0 pin.
In transmission, the read data and status are synchronized with the fall of the transfer clock and output to
the outside from the TxD0 pin.
The TxD0 pin is CMOS output. Transmission is in 8-bit blocks and LSB first.
When busy, either during transmission or reception, or while executing an erase operation or program,
the RTS0 (BUSY) pin is “H” level. Accordingly, do not start the next transmission until the RTS0 (BUSY)
pin is “L” level.
Also, data in memory and the status register can be read after inputting a software command. It is pos-
sible to check flash memory operating status or whether a program or erase operation ended success-
fully or in error by reading the status register.
Software commands and the status register are explained here following.
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Commands
Table DD-1 lists software commands. In the standard serial I/O mode, erase operations, programs and
reading are controlled by transferring software commands via the RxD pin. Software commands are
explained here below.
Table DD-1. Software commands (Standard serial I/O mode)
1st byte
transfer
When ID is
not verificate
Not
Control command
Page read
2nd byte 3rd byte 4th byte 5th byte 6th byte
Data
output to
259th
Address
(high)
Data
output
Data
output output
Data
Address
(middle)
1
2
FF16
acceptable
byte
Page program
Data input
to 259th
byte
Address
(high)
Data
input
Data
input
Data
input
4116
2016
Address
(middle)
Not
acceptable
Address
(high)
D016
Address
(middle)
D016
Not
acceptable
Not
acceptable
Acceptable
3
4
5
6
7
Bclock ease
Erase all unlocked blocks
Read status register
Clear status register
Read lockbit status
A716
7016
5016
7116
SRD1
output
SRD
output
Not
acceptable
Not
Address Lock bit
Address
(middle)
(high)
data
acceptable
output
To ID7
Address Address ID size
ID1
To
Address
(low)
Size
Acceptable
8
9
ID check function
Download function
F516
FA16
(middle)
Size
(high)
Check-
sum
Data
Not
acceptable
(high)
input required
number
(low)
of times
Version Version Version Version
Version
data
output
Address
(middle)
Acceptable
Version
data output
to 9th byte
Data
output to
259th byte
10 Version data output function
11 Boot area output function
FB16
FC16
data
output
Address
(high)
data
output
Data
data
output output
Data Data
output output
data
Not
acceptable
output
Note1: Shading indicates transfer from flash memory microcomputer to serial programmer. All other data is
transferred from the serial programmer to the flash memory microcomputer.
Note2: SRD refers to status register data. SRD1 refers to status register 1 data.
Note3: All commands can be accepted when the flash memory is totally blank.
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Page Read Command
This command reads the specified page (256 bytes) in the flash memory sequentially one byte at a
time. Execute the page read command as explained here following.
(1) Send the “FF16” command code in the 1st byte of the transmission.
(2) Send addresses A8 to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respec-
tively.
(3) From the 4th byte onward, data (D0–D7) for the page (256 bytes) specified with addresses A8 to
A23 will be output sequentially from the smallest address first in sync with the rise of the clock.
CLK0
A
8
to
A
16 to
FF16
RxD0
TxD0
A
15
A23
data0
data255
RTS0(BUSY)
Figure DD-2. Timing for page read
Read Status Register Command
This command reads status information. When the “7016” command code is sent in the 1st byte of the
transmission, the contents of the status register (SRD) specified in the 2nd byte of the transmission
and the contents of status register 1 (SRD1) specified in the 3rd byte of the transmission are read.
CLK0
RxD0
TxD0
7016
SRD
output
SRD1
output
RTS0(BUSY)
Figure DD-3. Timing for reading the status register
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clear Status Register Command
This command clears the bits (SR3–SR4) which are set when the status register operation ends in
error. When the “5016” command code is sent in the 1st byte of the transmission, the aforementioned
bits are cleared. When the clear status register operation ends, the RTS0 (BUSY) signal changes
from the “H” to the “L” level.
CLK0
5016
RxD0
TxD0
RTS0(BUSY)
Figure DD-4. Timing for clearing the status register
Page Program Command
This command writes the specified page (256 bytes) in the flash memory sequentially one byte at a
time. Execute the page program command as explained here following.
(1) Send the “4116” command code in the 1st byte of the transmission.
(2) Send addresses A
(3) From the 4th byte onward, as write data (D
to A23 is input sequentially from the smallest address first, that page is automatically written.
8
to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respectively.
0
–D ) for the page (256 bytes) specified with addresses
7
A
8
When reception setup for the next 256 bytes ends, the RTS0 (BUSY) signal changes from the “H” to
the “L” level. The result of the page program can be known by reading the status register. For more
information, see the section on the status register.
CLK0
A
8
to
A
16 to
RxD0
TxD0
4116
data0
data255
A
15
A23
RTS0(BUSY)
Figure DD-5. Timing for the page program
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Block Erase Command
This command erases the data in the specified block. Execute the block erase command as explained
here following.
(1) Send the “2016” command code in the 1st byte of the transmission.
(2) Send addresses A8 to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respec-
tively.
(3) Send the verify command code “D016” in the 4th byte of the transmission. With the verify com-
mand code, the erase operation will start for the specified block in the flash memory. Write the
highest address of the specified block for addresses A16 to A23.
When block erasing ends, the RTS0 (BUSY) signal changes from the “H” to the “L” level. After block
erase ends, the result of the block erase operation can be known by reading the status register. For
more information, see the section on the status register.
Each block can be erase-protected with the lock bit. For more information, see the section on the data
protection function.
CLK0
A
8
to
A
16 to
RxD0
TxD0
2016
D016
A
15
A23
RTS0(BUSY)
Figure DD-6.Timing for block erasing
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Erase All Unlocked Blocks Command
This command erases the content of all blocks. Execute the erase all unlocked blocks command as
explained here following.
(1) Send the “A716” command code in the 1st byte of the transmission.
(2) Send the verify command code “D016” in the 2nd byte of the transmission. With the verify com-
mand code, the erase operation will start and continue for all blocks in the flash memory.
When block erasing ends, the RTS0 (BUSY) signal changes from the “H” to the “L” level. The result of the
erase operation can be known by reading the status register.
CLK0
RxD0
TxD0
A716
D016
RTS0(BUSY)
Figure DD-7. Timing for erasing all unlocked blocks
Read Lock Bit Status Command
This command reads the lock bit status of the specified block. Execute the read lock bit status com-
mand as explained here following.
(1) Send the “7116” command code in the 1st byte of the transmission.
(2) Send addresses A8 to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respec-
tively.
(3) The lock bit data of the specified block is output in the 4th byte of the transmission. Write the
highest address of the specified block for addresses A8 to A23.
The M30218 group (flash memory version) does not have the lock bit, so the read value is always
“1” (block unlock).
CLK0
A8 to
A15
A16 to
A23
RxD0
TxD0
7116
DQ6
RTS0(BUSY)
Figure DD-8. Timing for reading lock bit status
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Download Command
This command downloads a program to the RAM for execution. Execute the download command as
explained here following.
(1) Send the “FA16” command code in the 1st byte of the transmission.
(2) Send the program size in the 2nd and 3rd bytes of the transmission.
(3) Send the check sum in the 4th byte of the transmission. The check sum is added to all data sent
in the 5th byte onward.
(4) The program to execute is sent in the 5th byte onward.
When all data has been transmitted, if the check sum matches, the downloaded program is executed.
The size of the program will vary according to the internal RAM.
CLK0
Program
data
Check
sum
Program
data
FA16
Data size (low)
RxD0
TxD0
Data size (high)
RTS0(BUSY)
Figure DD-9. Timing for download
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Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Version Information Output Command
This command outputs the version information of the control program stored in the boot area. Execute
the version information output command as explained here following.
(1) Send the “FB16” command code in the 1st byte of the transmission.
(2) The version information will be output from the 2nd byte onward. This data is composed of 8
ASCII code characters.
CLK0
FB16
RxD0
TxD0
'V'
'E'
'R'
'X'
RTS0(BUSY)
Figure DD-10. Timing for version information output
Boot Area Output Command
This command outputs the control program stored in the boot area in one page blocks (256 bytes).
Execute the boot area output command as explained here following.
(1) Send the “FC16” command code in the 1st byte of the transmission.
(2) Send addresses A8 to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respec-
tively.
(3) From the 4th byte onward, data (D0–D7) for the page (256 bytes) specified with addresses A8 to
A23 will be output sequentially from the smallest address first, in sync with the rise of the clock.
CLK0
A
8
to
A16 to
A23
FC16
RxD0
TxD0
A
15
data0
data255
RTS0(BUSY)
Figure DD-11. Timing for boot area output
170
Mitsubishi microcomputers
M30218 Group
Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
ID Check
This command checks the ID code. Execute the boot ID check command as explained here following.
(1) Send the “F516” command code in the 1st byte of the transmission.
(2) Send addresses A0 to A7, A8 to A15 and A16 to A23 of the 1st byte of the ID code in the 2nd, 3rd
and 4th bytes of the transmission respectively.
(3) Send the number of data sets of the ID code in the 5th byte.
(4) The ID code is sent in the 6th byte onward, starting with the 1st byte of the code.
CLK0
ID size
ID1
ID7
F516
DF16
FF16
0F16
RxD0
TxD0
RTS0(BUSY)
Figure DD-12. Timing for the ID check
ID Code
When the flash memory is not blank, the ID code sent from the serial programmer and the ID code
written in the flash memory are compared to see if they match. If the codes do not match, the com-
mand sent from the serial programmer is not accepted. An ID code contains 8 bits of data. Area is,
from the 1st byte, addresses 0FFFDF16, 0FFFE316, 0FFFEB16, 0FFFEF16, 0FFFF316, and
0FFFF716 . Write a program into the flash memory, which already has the ID code set for these
addresses.
Address
ID1 Undefined instruction vector
ID2 Overflow vector
0FFFDF16 to 0FFFDC16
0FFFE316 to 0FFFE016
0FFFE716 to 0FFFE416
0FFFEB16 to 0FFFE816
0FFFEF16 to 0FFFEC16
0FFFF316 to 0FFFF016
0FFFF716 to 0FFFF416
0FFFFB16 to 0FFFF816
0FFFFF16 to 0FFFFC16
BRK instruction vector
ID3 Address match vector
ID4 Single step vector
ID5 Watchdog timer vector
ID6 DBC vector
ID7
Reset vector
4 bytes
Figure DD-13. ID code storage addresses
171
Mitsubishi microcomputers
M30218 Group
Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Status Register (SRD)
The status register indicates operating status of the flash memory and status such as whether an erase
operation or a program ended successfully or in error. It can be read by writing the read status register
command (7016). Also, the status register is cleared by writing the clear status register command (5016).
Table DD-2 gives the definition of each status register bit. After clearing the reset, the status register
outputs “8016”.
Table DD-2. Status register (SRD)
Definition
SRD0 bits
Status name
"1"
"0"
Status bit
Reserved
Erase bit
Program bit
Reserved
Reserved
Reserved
Reserved
Ready
Busy
SR7 (bit7)
SR6 (bit6)
SR5 (bit5)
-
-
Terminated in error
Terminated normally
Terminated in error
Terminated normally
SR4 (bit4)
SR3 (bit3)
-
-
-
-
-
-
-
-
SR2 (bit2)
SR1 (bit1)
SR0 (bit0)
Status Bit (SR7)
The status bit indicates the operating status of the flash memory. When power is turned on, “1” (ready)
is set for it. The bit is set to “0” (busy) during an auto write or auto erase operation, but it is set back to
“1” when the operation ends.
Erase Bit (SR5)
The erase bit reports the operating status of the auto erase operation. If an erase error occurs, it is set
to “1”. When the erase status is cleared, it is set to “0”.
Program Bit (SR4)
The program bit reports the operating status of the auto write operation. If a write error occurs, it is set
to “1”. When the program status is cleared, it is set to “0”.
172
Mitsubishi microcomputers
M30218 Group
Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Status Register 1 (SRD1)
Status register 1 indicates the status of serial communications, results from ID checks and results from
check sum comparisons. It can be read after the SRD by writing the read status register command (7016).
Also, status register 1 is cleared by writing the clear status register command (5016).
Table DD-3 gives the definition of each status register 1 bit. “0016” is output when power is turned ON and
the flag status is maintained even after the reset.
Table DD-3. Status register 1 (SRD1)
Definition
SRD1 bits
Status name
"1"
"0"
Boot update completed bit
Reserved
SR15 (bit7)
SR14 (bit6)
SR13 (bit5)
Not update
Update completed
-
-
Reserved
-
-
Checksum match bit
ID check completed bits
Match
SR12 (bit4)
SR11 (bit3)
Mismatch
00
01
10
11
Not verified
Verification mismatch
Reserved
SR10 (bit2)
Verified
Data receive time out
Reserved
SR9 (bit1)
SR8 (bit0)
Time out
-
Normal operation
-
Boot Update Completed Bit (SR15)
This flag indicates whether the control program was downloaded to the RAM or not, using the down-
load function.
Check Sum Consistency Bit (SR12)
This flag indicates whether the check sum matches or not when a program, is downloaded for execu-
tion using the download function.
ID Check Completed Bits (SR11 and SR10)
These flags indicate the result of ID checks. Some commands cannot be accepted without an ID
check.
Data Reception Time Out (SR9)
This flag indicates when a time out error is generated during data reception. If this flag is attached
during data reception, the received data is discarded and the microcomputer returns to the command
wait state.
173
Mitsubishi microcomputers
M30218 Group
Appendix Standard Serial I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Example Circuit Application for The Standard Serial I/O Mode
The below figure shows a circuit application for the standard serial I/O mode. Control pins will vary ac-
cording to programmer, therefore see the programmer manual for more information.
Clock input
RTS output
Data input
CLK0
RTS0(BUSY)
R
XD0
T
XD0
Data output
M30218 Flash
memory version
V
PP
CNVss
(1) Control pins and external circuitry will vary according to programmer. For
more information, see the programmer manual.
(2) In this example, the microprocessor mode and standard serial I/O mode are
switched via a switch.
Figure DD-14. Example circuit application for the standard serial I/O mode
174
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
MMP
100P6S-A
Plastic 100pin 14✕20mm body QFP
EIAJ Package Code
JEDEC Code
–
Weight(g)
1.58
Lead Material
Alloy 42
MD
QFP100-P-1420-0.65
HD
D
100
81
1
80
I
2
Recommended Mount Pad
Dimension in Millimeters
Symbol
Min
–
0
–
0.25
0.13
13.8
19.8
–
16.5
22.5
0.4
–
–
–
0°
–
1.3
–
Nom
–
Max
3.05
0.2
–
0.4
0.2
14.2
20.2
–
17.1
23.1
0.8
–
0.13
0.1
10°
–
A
A
A
1
2
0.1
2.8
0.3
0.15
14.0
20.0
0.65
16.8
22.8
0.6
1.4
–
b
c
D
E
e
30
51
31
50
HD
A
L1
HE
L
L1
x
y
–
–
F
b2
0.35
–
14.6
20.6
e
b
L
x
M
I
2
–
–
–
Detail F
y
M
M
D
E
–
175
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Revision History
Version
Revision
date
Contents for change
99.12.21
REV.A1
Page 2 Figure AA-1
M30218-XXXFP ---> M30218-XXXXFP
Page 10 Figure BA-3
03B816 DMA0 cause select register ---> DMA0 request cause select register
03BA16 DMA1 cause select register ---> DMA1 request cause select register
Page 55 Figure KA-2 FLDC mode register
bit3, bit2
(at rising edge of each edge) ---> (at rising edge of each digit)
11: ---> 10:
Page 90 Figure GA-4 UARTi transmit/receive control register 0
bit4 (P47 and P74 function as) ---> (P47 and P77 function as)
Page 128 Exclusive High-breakdown]voltage Output Ports Line 2
All ports have structure of high-breakdown-voltage P-channel open drain output
and pull-down resistance. ---> All ports have structure of high-breakdown-voltage
P-channel open drain output. Exclusive output ports except P2 have built-in pull-
down resistance.
Page 134
Add to Note 3.
00.11.10
REV.B
Page 150 Figure Z-34 Automatic transfer serial I/O
Decided electrical standard values (at VCC = 3V)
Page 153 Figure AA-3
User ROM area block number
E000016 to E
E800016 to EFFFF16 Block 1 ---> Block 2
F000016 to F FFF16 Block 2 ---> Block 1
7FFF16 Block 0 ---> Block 3
7
F800016 to FFFFF16 Block 3 ---> Block 0
Page 154 Figure BB-1 Flash memory control register 0
bit6 bit5 bit4
0
0
0
0
0
0
1
1
0 : Block 0 program/erase ---> Block 3 program/erase
1 : Block 1 program/erase ---> Block 2 program/erase
0 : Block 2 program/erase ---> Block 1 program/erase
1 : Block 3 program/erase ---> Block 0 program/erase
01.1.24
Page 2, 5, 6, 7, 128, 133, 134, 140, 142 and 146
Delete about mask option specification of pull-down resistor
M30218 Data sheet
Revision history
176
Keep safety first in your circuit designs!
●
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Please contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semicon
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tained therein.
MITSUBISHI SEMICONDUCTORS
M30218 Group Data Sheet REV.B
Feb. First Edition 2001
Editioned by
Committee of editing of Mitsubishi Semiconductor
Published by
Mitsubishi Electric Corp., Kitaitami Works
This book, or parts thereof, may not be reproduced in any form without
permission of Mitsubishi Electric Corporation.
©2001 MITSUBISHI ELECTRIC CORPORATION
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