SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C1 Group
4
PIN DESCRIPTION
Table 1 Pin description
Function
Pin
Name
Function except a port function
Apply voltage of power source to VCC, and 0 V to VSS.
(As for VCC, refer to the recommended operating condition)
Connect to Vss.
Reset input pin for active “L”.
Input and output pins for the main clock generating circuit.
Connect a ceramic resonator or a quartz-crystal oscillator between the XIN and XOUT pins to set the
oscillation frequency.
If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
A feedback resistor is built-in.
Input 0
≤ VL1 ≤ VL2 < VL3 voltage.
LCD common output pins.
8-bit input port.
CMOS compatible input level.
1, 2, 4 or 8-bit input and 8-bit pull-down can be programmed.
LCD segment output pin.
8-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
1-bit input/output and pull-down can be programmed.
5-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
1-bit input/output and pull-up can be programmed.
Analog input pins for A-D converter.
When these pins are used as ADKEY pins, the input
voltage of ADKEY pin which is input “L” level is A-D
converted automatically.
4-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
1-bit input/output and pull-up can be programmed.
8-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
1-bit input/output and pull-up can be programmed.
5-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
1-bit input/output and pull-up can be programmed.
Power source
CNVSS
Reset input
Clock input
VCC, VSS
CNVSS
RESET
XIN
XOUT
VL1–VL3
COM0–COM3
P00/SEG0–
P07/SEG7
SEG8–/SEG16
P20/SEG17–
P27/SEG24
P30(LED)/KW0–
P34(LED)/KW4
AN0/ADKEY0–
AN3/ADKEY3
P44/AN4–
P47/AN7
P50/INT0,
P51/INT1
P52/CNTR0
P53/CNTR1
P54/SIN
P55/SOUT
P56/SCLK
P57/SRDY
P60/XCIN
P61/XCOUT
P62/TOUT
P63/
φOUT
P64
Clock output
LCD power source
Common output
Input port P0
Segment output pin
I/O port P2
I/O port P3
Analog input
I/O port P4
I/O port P5
I/O port P6
LCD segment output pins
Key input (key-on wake-up) interrupt
input pins
ADKEY input pins
Analog input pins for A-D converter
Interrupt input pins
Timer X, timer Y function pins
Serial I/O function pins
Sub-clock generating circuit I/O pins
(Oscillator is connected.
External clock cannot be input directly.)
Timer 2 output pin
System clock
φ output