M34280E1FP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M34280E1FP

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4280 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

PORT BLOCK DIAGRAMS

Register Y

Decoder

SD instruction

RD instruction

CLD instruction

SQ

R

(Note 1)

Ports D0–D6

Register Y

Decoder

SD instruction

RD instruction

CLD instruction

Skip decision (SZD instruction)

Key-on wakeup input

SQ

R

PU02

(Note 1)

Pull-down

transistor

Port D7 (Note 4)

Register A

A0

OEA

instruction

A0

DQ

IAE instruction

T

Key-on wakeup input

Register A

A1

OEA

instruction

A1

PU00

DQ

IAE instruction

T

Key-on wakeup input

PU01

(Note 1)

Port E0 (Note 4)

Pull-down

transistor

(Note 1)

Port E1 (Note 4)

Pull-down

transistor

Register A

A2

IAE instruction

Key-on wakeup input

Pull-down

transistor

Port E2 (Note 4)

(Note 1)

Register A

Ai

(Note 2)

OGA

instruction

Ai

DQ

T IAG instruction

Key-on wakeup input

(Note 1)

Ports G0–G3 (Note 4)

Pull-down

transistor

Register A TAC instruction

TCA instruction

Register A

Aj (Note 3)

Register C

Aj (Note 3)

Carrier wave

output circuit

To timer 1

CARRY

(Note 1)

Port CARR

Register A

A3

OCRA instruction

Timer 1 underflow signal

DQ

TR

V12

TCA

instruction

DQ

TR

V10

Carrier wave

output control

signal

Notes 1:

This symbol represents a parasitic diode.

2: i represents bits 0 to 3.

3: j represents bits 0 to 2.

4: Applied voltage must be less than VDD.

MITSUBISHI

ELECTRIC

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