UPD753204 datasheet(7/80 Pages) NEC

Part #	UPD753204

Description	4-BIT SINGLE-CHIP MICROCONTROLLERS

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Manufacturer	NEC [NEC]

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µPD753204, 753206, 753208

3. PIN FUNCTION

3.1 Port Pins (1/2)

Pin Name

Input/Output

Alternate

Function

8-bit

After Reset

I/O Circuit

Function

I/O

TYPE Note 1

P00

Input

INT4

No

Input

(B)

P01

Input/Output

SCK

(F)-A

P02

Input/Output

SO/SB0

(F)-B

P03

Input/Output

SI/SB1

(M)-C

P10

Input

INT0

No

Input

(B)-C

P13

TI0

P20

Input/Output

PTO0

No

Input

E-B

P21

PTO1

P22

PCL/PTO2

P23

BUZ

P30

Input/Output

LCDCL

No

Input

E-B

P31

SYNC

P32

–

P33

–

P50 to

Input/Output

–

No

M-D

P53 Note 2

Notes 1. Characters in parentheses indicate the Schmitt-trigger input.

2. If on-chip pull-up resistors are not specified by mask option (when used as N-ch open-drain input port),

low level input leakage current increases when input or bit manipulation instruction is executed.

4-bit input port (PORT0).

For P01 to P03, on-chip pull-up resistors can

be specified by software in 3-bit units.

High level

(when pull-

up resistors

are

provided) or

high-

impedance

Input port in 1 bit unit (PORT1).

On-chip pull-up resistors can be specified by

software in 2-bit units.

Noise elimination circuit can be specified with

P10/INT0.

4-bit input/output port (PORT2).

On-chip pull-up resistors can be specified by

software in 4-bit units.

Programmable 4-bit input/output port (PORT3).

This port can be specified input/output bit-

wise. On-chip pull-up resistor can be speci-

fied by software in 4-bit units.

N-ch open-drain 4-bit input/output port (PORT5).

A pull-up resistor can be contained bit-wise

(mask option).

Withstand voltage is 13 V in open-drain mode.

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