UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 10

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

1.2 NON-PORT PINS (2/2)
10
Note The circuits enclosed in circles have a Schmitt-triggered input.
V
V
Pin name
AN0-AN3
AN4-AN7
SO0/SB0
DD
SS
SI0/SB1
X1, X2
RESET
PTO0
SCK0
SCK1
AV
V
INT4
INT0
INT1
INT2
AV
AV
BUZ
SO1
PPO
XT1
XT2
(2 pins)
PCL
(3 pins)
SI1
TI0
LOAD
REF
DD
SS
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
–
–
–
–
–
–
I
I
I
I
I
I
I
I
I
I
Also
used as
P90-P93
P13
P20
P22
P23
P01
P02
P03
P00
P10
P11
P12
P81
P82
P83
P80
–
–
–
–
–
–
–
–
–
–
External event pulse input for timer/event counter #0 and
event counter #1.
Timer/event counter output
Clock output
Fixed frequency output (for buzzer or system clock trimming)
Serial clock I/O
Serial data output or serial bus I/O
Serial data input or serial bus I/O
Edge detection vectored interrupt input (Either a rising or
falling edge is detected.)
Serial clock I/O
Serial data output
Serial data input
Analog input to A/D converter
Power supply for A/D converter
A/D converter reference voltage input
A/D converter reference GND
Connection to a crystal/ceramic resonator for main system
clock generation. When external clock is used, it is input to
X1, and its inverted signal is input to X2.
Connection to a crystal resonator for subsystem clock
generation. When external clock is used, it is input to XT1,
and XT2 is left open.
System reset input
Timer/pulse generator pulse output
Positive power supply
GND potential
Pull-down resistor connection for the FIP controller/driver,
or power supply
Edge detection vectored interrupt input
(The edge to be detected is selectable.)
Edge detection testable input
(An rising edge is detected.)
Function
Synchronous
Asynchronous
Asynchronous
When reset
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
–
–
–
–
–
–
–
–
–
–
–
–
–
–
I/O
circuit
type
M - C
B
E - B
E - B
E - B
F
F
B
B
Y - A
PD75238
Note
B
F
E
B
Y
Z
B
–
–
–
–
–
–
–
–
- C
- A
- B
- C
- C