MSM65512A Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Fabricante

MSM65512A

High Performance 8-Bit Microcontroller

Oki Electric Industry 

¡ Semiconductor

MSM65512A/65P512A

PIN DESCRIPTIONS

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

PORT 1

I/O

PORT 2

I/O

PORT 3

Description

+5V power supply

0V digital ground

Crystal oscillation input/external clock input

Crystal oscillation output

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

internal pull-up resistor

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 ¥ 2. Secondary functions shown in following table are

added for ports 2 and 3.

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