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
7531 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
The 7531 Group is the 8-bit microcomputer based on the 740 family
core technology.
The 7531 Group has a serial I/O, 8-bit timers, and an A-D converter,
and is useful for control of home electric appliances and office auto-
mation equipment.
•
Watchdog timer ............................................................ 16-bit
✕
1
•
Power source voltage
At 8 MHz X
IN
oscillation frequency at ceramic oscillation
................................................................................... 4.0 to 5.5 V
At 4 MHz X
IN
oscillation frequency at ceramic oscillation
................................................................................... 2.4 to 5.5 V
At 2 MHz X
IN
oscillation frequency at ceramic oscillation
................................................................................... 2.2 to 5.5 V
At 4 MHz X
IN
oscillation frequency at RC oscillation
................................................................................... 4.0 to 5.5 V
At 2 MHz X
IN
oscillation frequency at RC oscillation
................................................................................... 2.4 to 5.5 V
At 1 MHz X
IN
oscillation frequency at RC oscillation
................................................................................... 2.2 to 5.5 V
Power dissipation ............................................ 25 mW (standard)
Operating temperature range ................................... –20 to 85 °C
(–40 to 85 °C or –40 to 125 °C for extended operating temperature
version)
FEATURES
•
•
•
•
•
•
•
•
•
•
Basic machine-language instructions ....................................... 69
The minimum instruction execution time .......................... 0.50 µs
(at 8 MHz oscillation frequency for the shortest instruction, in high-
speed mode)
Memory size ROM .............................................. 8K to 16K bytes
RAM .............................................. 256 to 384 bytes
Programmable I/O ports ........................................................... 29
(25 in 32-pin version)
Interrupts .................................................... 12 sources, 8 vectors
(11 sources, 8 vectors for 32-pin version)
Timers ............................................................................ 8-bit
✕
3
Serial I/O1 ...................................................................... 8-bit
✕
1
(UART)
Serial I/O2 ...................................................................... 8-bit
✕
1
(Clock-synchronized)
A-D converter ................................................ 10-bit
✕
8 channels
(6 channels for 32-pin version)
Clock generating circuit ............................................. Built-in type
(connect to external ceramic resonator or quartz-crystal oscillator
permitting RC oscillation)
•
•
APPLICATION
Office automation equipment, factory automation equipment, home
electric appliances, consumer electronics, car, etc.
PIN CONFIGURATION (TOP VIEW)
P1
2
/S
CLK
P1
3
/S
DATA
P1
4
/CNTR
0
P2
0
/AN
0
P2
1
/AN
1
P2
2
/AN
2
P2
3
/AN
3
P2
4
/AN
4
P2
5
/AN
5
P2
6
/AN
6
P2
7
/AN
7
V
REF
RESET
CNV
SS
Vcc
X
IN
X
OUT
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
P1
1
/T
X
D
P1
0
/R
X
D
P0
7
P0
6
P0
5
P0
4
P0
3
P0
2
P0
1
P0
0
P3
7
/INT
0
P3
6
(LED
6
)/INT
1
P3
5
(LED
5
)
P3
4
(LED
4
)
P3
3
(LED
3
)
P3
2
(LED
2
)
P3
1
(LED
1
)
P3
0
(LED
0
)
Package type: 36P2R-A
Fig. 1 Pin configuration (36P2R package type)
M37531M4-XXXFP
M37531M4T-XXXFP
M37531M8-XXXFP
M37531E4FP
M37531E8FP