MSM82C37B-5GS 查看數據表（PDF） - Oki Electric Industry

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MSM82C37B-5GS

PROGRAMMABLE DMA CONTROLLER

Oki Electric Industry 

¡ Semiconductor

MSM82C37B-5RS/GS/VJS

BLOCK DIAGRAM

IOR

IOW

MEMR

MEMW

READY

ADSTB

AEN

CS

CLK

RESET

EOP

Timing

Control

Circuit

HLDA

HRQ

DREQ0 - 3

DACK0 - 3

Priority

4 Judgment

4 Circuit

TC

(Terminal Count)

Decrementer

Temporary Word

Count Register (16)

Incrementer/Decrementer

Temporary Address

Register (16)

16 Bit Bus 16 Bit Bus

8 4 Output

Buffer

4

Input/Output

Buffer

Base Word

Count

Register

(4 ¥ 16)

Current

Word

Count

Register

(4 ¥ 16)

Base

Address

Register

(4 ¥ 16)

Current

Address

Register

(4 ¥ 16)

Mode

Register

(4 ¥ 16)

Command

Register (8)

Mark

Register (4)

Request

Register (4)

Internal Data Bus

Status

Register (8)

Temporary

Register (8)

Command

Control

Circuit

2

D0 - 1

Input/Output

Buffer

A4 - A7

A0 - A3

DB0 - DB7

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