MITSUBISHI MICROCOMPUTERS
7630 Group
3
MITSUBISHI
ELECTRIC
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Table 1: Pin description
Pin
Name
Input/Output
Description
V
CC
, V
SS
Power source
voltage
Power supply
pins; apply 4.0 to 5.5 V to V
CC
and 0 V to V
SS
AV
SS
Analog power
source voltage
Ground pin for A-D converter. Connect to V
SS
RESET
Reset input
Input
Reset pin. This pin must be kept at “L” level for more than 2
μ
s, to enter the reset
state. If the crystal or ceramic resonator requires more time to stabilize, extend the
“L” level period.
X
IN
Clock input
Input
Input and output pins of the internal clock generating circuit. Connect a ceramic or
quartz–crystal resonator between the X
IN
and X
OUT
pins. When an external clock
source is used, connect it to X
IN
and leave X
OUT
open.
X
OUT
Clock output
Output
V
REF
Reference volt-
age input
Input
Reference voltage input pin for A-D converter
P0
0
/AN
0
—
P0
7
/AN
7
I/O port P0
I/O
CMOS I/O ports or analog input ports
P1
1
/INT
0
Input
CMOS input port or external interrupt input port. The active edge (rising or falling) of
external interrupts can be selected. This pin will be used as V
PP
pin during PROM
programming of One Time PROM Versions.
P1
2
/INT
1
CMOS I/O port or external interrupt input port. The active edge (rising or falling) of
external interrupts can be selected.
P1
3
/TX
0
CMOS I/O port or input pin used in the bi-phase counter mode
P1
4
/CNTR
0
I/O port P1
I/O
CMOS I/O port or timer X input pin used for the event counter, pulse width measure-
ment and bi-phase counter mode
P1
5
/CNTR
1
CMOS I/O port or timer Y input pin used for the event counter, pulse width and pulse
period measurement mode
P1
6
/PWM
CMOS I/O port or PWM output pin used in the PWM mode of timers 2 and 3
P1
7
CMOS I/O port
P2
0
/S
IN
P2
1
/S
OUT
P2
2
/S
CLK
P2
3
/S
RDY
CMOS I/O ports or clock synchronous serial I/O pins
P2
4
/UR
X
D
P2
5
/UT
X
D
P2
6
/U
RTS
P2
7
/U
CTS
CMOS I/O ports or asynchronous serial I/O pins
P3
0
CMOS I/O port
P3
1
/CTX
CMOS I/O port or CAN transmit data pin
P3
2
/CRX
CMOS I/O port or CAN receive data pin
P3
3
—P3
4
CMOS I/O port
P4
0
/KW
0
—
P4
7
/KW
7
I/O port P4
I/O
CMOS I/O ports. These ports can be used for key-on wake-up when configured as
inputs.
I/O port P2
I/O port P3
I/O
I/O