UPD70F3003A datasheet(10/44 Pages) NEC

10 / 44 page

µPD70F3003A, 70F3025A

Data Sheet U13189EJ3V0DS00

(2/2)

Pin Name

I/O

Function

Shared with:

SCK0

I/O

Serial clock I/O of CSI0-CSI3 (3 wire)

P24

SCK1

P27

SCK2

P17/INTP123

SCK3

P37/INTP133

TXD0

Output

Serial transmit data output of UART0-UART1

P22/SO0

TXD1

P25/SO1

RXD0

Input

Serial receive data input of UART0-UART1

P23/SI0

RXD1

P26/SI1

PWM0

Output

Pulse signal output of PWM

P20

PWM1

P21

AD0-AD7

I/O

16-bit multiplexed address/data bus when external memory is connected

P40-P47

AD8-AD15

P50-P57

A16-A19

Output

High-order address bus when external memory is connected

P60-P63

LBEN

Output

Low-order byte enable signal output of external data bus

P90

UBEN

High-order byte enable signal output of external data bus

P91

R/W

Output

External read/write status output

P92

DSTB

External data strobe signal output

P93

ASTB

External address strobe signal output

P94

HLDAK

Output

Bus hold acknowledge output

P95

HLDRQ

Input

Bus hold request input

P96

ANI0-ANI7

Input

Analog input to A/D converter

P70-P77

ANO0, ANO1

Output

Analog output of D/A converter

—

NMI

Input

Non-maskable interrupt request input

—

CLKOUT

Output

System clock output

—

CKSEL

Input

Input specifying operation mode of clock generator

CVDD

WAIT

Input

Control signal input inserting wait state in bus cycle

—

MODE

Input

Operation mode specification

—

RESET

Input

System reset input

—

Input

System clock resonator connection. Input external clock to X1 to

—

supply external clock.

—

ADTRG

Input

A/D converter external trigger input

P07/INTP113

AVREF1

Input

Reference voltage input for A/D converter

—

AVREF2

Input

Reference voltage input for D/A converter

—

AVREF3

—

AVDD

—

Positive power supply for A/D converter

—

AVSS

—

Ground potential for A/D converter

—

CVDD

—

Positive power supply for internal clock generator

CKSEL

CVSS

—

Ground potential for internal clock generator

—

VDD

—

Positive power supply

—

VSS

—

Ground potential

—

VPP

—

High voltage application pin when program is written/verified

—

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