MSM65514 Ver la hoja de datos (PDF) - Oki Electric Industry

Número de pieza

componentes Descripción

Fabricante

MSM65514

High Performance 8-Bit Microcontroller

Oki Electric Industry 

¡ Semiconductor

MSM65514/65P514

PIN DESCRIPTION

Basic Functions

Function

Power

Supply

Oscillation

Symbol

VDD

GND

OSC0

OSC1

RESET

Type

—

—

I

O

I

EA

I

Control

RD

O

ALE

O

PORT 0

I/O

PORT 1

I/O

Port

PORT 2

I/O

PORT 3

PORT 4

PORT 5

PORT 6

I

Description

+5V power supply

0V ground

System clock input pin. Quartz oscillator or ceramic oscillator is

connected between OSC0 and OSC1. For external clock, input at OSC0,

leaving OSC1 open.

System clock output pin

System reset input (program starts from address 0040H);

internal pull-up resistance

Program memory select input pin.

"L" level input for external program memory; "H" level input for internal

program memory.

Read strobe signal during external memory access

Address latch signal during external memory access

8-bit Input-output port

During external memory access, becomes address/data bus for address

output, instruction fetch or data read/write along with ALE, RD and WR

pins.

8-bit Input-output port

Address bus during external memory access

8-bit Input-output port ¥ 4. Secondary functions shown in following table

are added for ports 2 and 3.

8-bit Input port

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