UPD75512A datasheet(8/64 Pages) NEC

Part #	UPD75512A

Description	4-BIT SINGLE-CHIP MICROCOMPUTER

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Manufacturer	NEC [NEC]

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

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µPD75512(A)

8

3.

PIN FUNCTIONS

3.1

PORT PINS (1/2)

Input/

Shared

Function

8-bit

When Reset

Output

Name

Output

I/O

Circuit

Type*

P00

INT4

4-bit input port (PORT0).

B

For P01 to P03, built-in pull-up

P01

SCK0

resistors can be specified in 3-bit

F -A

Input

units by software.

x

Input

P02

SO0/SB0

F -B

P03

SI0/SB1

M -C

P10

INT0

With noise

elimination function

P11

INT1

Input

4-bit input port (PORT1).

x

Input

B -C

P12

INT2

Built-in pull-up resistors can be

specified by software in 4-bit units.

P13

TI0

P20

PTO0

4-bit input/output port (PORT2).

P21

Input/

—

Built-in pull-up resistors can be

output

specified by software in 4-bit units.

x

Input

E-B

P22

PCL

P23

BUZ

P30

—

Programmable 4-bit input/output

port (PORT3).

P31

Input/

—

Input/output can be specified in

output

bit units.

x

Input

E-C

P32

—

Built-in pull-up resistors can be

specified by software in 4-bit unit.

P33

—

N-ch open-drain 4-bit input/output

High level

port (PORT4).

(when pull-up

P40 to

Input/

—

A pull-up resistor can be provided

resistor is

M

P43

output

in bit units (mask option).

provided) or

10V withstanding voltage in the

high impedance

open-drain mode.

O

N-ch open-drain 4-bit input/output

High level

port (PORT5).

(when pull-up

P50 to

Input/

—

A pull-up resistor can be provided

resistor is

M

P53

output

in bit units (mask option).

provided) or

10V withstanding voltage in the

high impedance

open-drain mode.

P60

KR0

Programmable 4-bit input/ output

port (PORT6).

P61

Input/

KR1

Input/output can be specified in

output

bit units.

O

Input

F -C

P62

KR2

Built-in pull-up resistors can be

specified by software in 4-bit units.

P63

KR3

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

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