UPD75238GJ View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD75238GJ

4 BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75238

1.2 NON-PORT PINS (2/2)

Pin name

TI0

PTO0

PCL

BUZ

SCK0

SO0/SB0

SI0/SB1

INT4

INT0

INT1

INT2

SCK1

SO1

SI1

AN0-AN3

AN4-AN7

AVDD

AVREF

AVSS

X1, X2

XT1

XT2

RESET

PPO

VDD (3 pins)

VSS (2 pins)

VLOAD

Also

I/O used as

Function

I/ONote

When reset circuit

type

I

P13 External event pulse input for timer/event counter #0 and

–

event counter #1.

O

P20 Timer/event counter output

Input

O

P22 Clock output

Input

O

P23

Fixed frequency output (for buzzer or system clock trimming) Input

I/O

P01 Serial clock I/O

Input

I/O

P02 Serial data output or serial bus I/O

I/O

P03 Serial data input or serial bus I/O

Input

Input

I

P00 Edge detection vectored interrupt input (Either a rising or

–

falling edge is detected.)

I

P10 Edge detection vectored interrupt input

Synchronous

–

P11

(The edge to be detected is selectable.)

Asynchronous

I

P12 Edge detection testable input

Asynchronous

–

(An rising edge is detected.)

I/O

P81 Serial clock I/O

Input

O

P82 Serial data output

Input

I

P83 Serial data input

Input

I

–

Analog input to A/D converter

–

P90-P93

–

–

Power supply for A/D converter

–

I

–

A/D converter reference voltage input

–

–

–

A/D converter reference GND

–

I

–

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.

I

–

Connection to a crystal resonator for subsystem clock

–

generation. When external clock is used, it is input to XT1,

–

and XT2 is left open.

I

–

System reset input

–

O

P80 Timer/pulse generator pulse output

Input

–

–

Positive power supply

–

–

–

GND potential

–

–

–

Pull-down resistor connection for the FIP controller/driver,

–

or power supply

B-C

E-B

E-B

E-B

F-A

F-B

M-C

B

B-C

B-C

F

E

B

Y

Y-A

–

Z

–

–

–

B

–

–

–

–

Note The circuits enclosed in circles have a Schmitt-triggered input.

10

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