UPD75512GF datasheet(10/64 Pages) NEC

Part #	UPD75512GF

Description	4-BIT SINGLE-CHIP MICROCOMPUTER

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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10 / 64 page

µPD75512(A)

10

3.2

NON-PORT PINS

Input/

Shared

Function

When Reset

Output

Name

Output

Circuit

Type*

TI0

Input

P13

The external event pulse input for the timer/event

—

B -C

counter.

PTO0

Output

P20

Timer/event counter output

Input

E-B

PCL

Output

P22

Clock output

Input

E-B

BUZ

Output

P23

Fixed frequency output (for buzzer output or

Input

E-B

system clock trimming)

SCK0

Input/

P01

Serial clock input/output

Input

F -A

output

SO0/SB0

Input/

P02

Serial data output

Input

F -B

output

Serial bus input/output

SI0/SB1

Input/

P03

Serial data input

Input

M -C

output

Serial bus input/output

INT4

Input

P00

Edge detection vector interrupt input (both rising

—

B

edge and falling edge detection)

INT0

P10

Edge detection vector

Synchronized

interrupt input

with clock

Input

(detection edge selectable)

—

B -C

INT1

P11

Asynchronous

INT2

Input

P12

Edge detection testable input

Asynchronous

—

B -C

(rising edge detection)

KR0-KR3

Input

P60-P63

Parallel falling edge detection testable input

Input

F -C

KR4-KR7

Input

P70-P73

Parallel falling edge detection testable input

Input

F -A

SCK1

Input/

P81

Serial clock input/output

Input

F

output

SO1

Output

P82

Serial data output

Input

E

SI1

Input

P83

Serial data input

Input

B

AN0-AN3

—

Y

Input

A/D converter analog input

—

AN4-AN7

P150-P153

Y-A

AVREF

Input

—

A/C converter reference voltage input

—

Z

AVSS

—

A/D converter reference ground

—

Pins for connecting the crystal ceramic oscillator

to the main system clock generator. When

X1, X2

Input

—

inputting the external clock, input the external

—

clock to pin X1, and the reverse phase of the

external clock to pin X2.

XT1

Input

Pins for connecting the crystal oscillator to the

—

subsystem clock generator. When the external

—

clock is used, inputs the external clock to pin

XT1. In this case, pin XT2 must be left open.

RESET

Input

—

System reset input

—

B

PPO

Output

P80

Timer/pulse generator pulse output

Input

E

IC

—

Internally Connected. Connect directly to VSS.—

—

VDD

—

Positive power supply

—

VSS

—

GND

—

*: The number enclosed with a circle indicates Schmidt trigger input.

XT2

—

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