MSM6404 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM6404

High speed and High performance 4-Bit Microcontroller

Oki Electric Industry 

¡ Semiconductor

MSM6404A/6404VS

PIN DESCRIPTIONS

Symbol

P0.0

P0.1/SCK

P0.2/SO

P0.3/SI

P1.0/CIN

P1.1/TMO

P1.2/TCK

P1.3

P2.0/INT

P2.1

P2.2

P2.3

P3.0 to 3.3

P4.0 to 4.3

P5.0 to 5.3

P6.0 to 6.3

P7.0 to 7.3

P8.0 to 8.3

OSC0

OSC1

TEST

Type

Description

P0.1 is shared with serial clock (SCK) input/output.

I/O

P0.2 is shared with serial data (SO) output.

P0.3 is shared with serial data (SI) input.

P1.0 is shared with counter input (CIN).

P1.1 is shared with timer output (TMO).

I/O

P1.2 is shared with timer clock input (TCK).

P2.0 is shared with external interrupt input (INT).

I

Input port with a latch, built-in pull-up resistor

I/O

—

I/O

8-bit output ports (at OPT instruction execution)

I/O

I/O

—

I/O

—

I/O

—

I

Crystal connection pins for clock oscillation

O

O

(Test pin for manufacturer)

During reset

"1"

"1"

The latch is

reset.

"1"

"0"

"0"

"0"

"0"

Oscillation

waveform

Pulse output

RESET

I

Input pin for system reset

—

VDD

— Power supply voltage pins

—

GND

Note: 1. The ports except for pins P2.0 to P2.3 are pseudo bidirectional ports.

2. When each port is used for output, the MSM6404A can drive one TTL (one input) and

the MSM6404VS can drive one LS TTL (one input).

Upper Pins for MSM6404VS

Symbol

A0 to A12

I0 to I7

CE/GND

OE/GND

PGM/VDD

VDD

GND

VPP/VDD

Type

O

I

I

I

I

—

—

Address output

Data input

Chip enable input

Output enable input

Program input

Description

Power supply voltage pins

Programed power supply voltage pin

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