UPD75304BGC View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD75304BGC

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75304B,75306B,75308B

3. PIN FUNCTIONS

3.1 PORT PINS (1/2)

Pin Name

P00

P01

P02

P03

P10

P11

P12

P13

P20

P21

P22

P23

P30 *2

P31 *2

P32 *2

P33 *2

P40 to P43 *2

P50 to P53 *2

Input/Output

Input

Input/output

Input/output

Input/output

Input

Input/output

Input/output

Input/output

Input/output

Dual-

Function Pin

Function

8-bit I/O

After

Reset

I/O Circuit

Type *1

INT4

B

SCK

4-bit input port (PORT 0)

On-chip pull-up resistor can be specified for

×

SO/SB0 P01 to P03 as a 3-bit unit by software.

Input

F -A

F -B

SI/SB1

M-C

INT0

With noise elimination function

INT1

4-bit input port (PORT 1)

×

INT2

On-chip pull-up resistor can be specified as a

4-bit unit by software.

TI0

Input

B -C

PTO0

—

4-bit input/output port (PORT 2)

On-chip pull-up resistor can be specified as a

×

PCL

4-bit unit by software.

BUZ

Input

E-B

LCDCL

SYNC

—

Programmable 4-bit input/output port (PORT 3)

Input/output can be specified bit-wise.

On-chip pull-up resistor can be specified as a

×

4-bit unit by software.

—

Input

E-B

N-ch open-drain 4-bit input/output port (PORT

4)

—

On-chip pull-up resistor can be specified bit-

wise (mask option).

Open-drain: 10 V withstand voltage

N-ch open-drain 4-bit input/output port (PORT

5)

—

On-chip pull-up resistor can be specified bit-

wise (mask option).

Open-drain: 10 V withstand voltage

High level (on-

chip pull-up

resistor) or high-

M

impedance

High level (on-

chip pull-up

resistor) or high-

M

impedance

* 1. : Schmitt trigger input

2. LED direct drive possible

9

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