ASAHI KASEI

[AK6480C/81]

DAS04E-00

2005/03

- 5 -

Functional Description

The AK6480C/81C has 5 instructions such as READ, WRITE, Page Write, WREN (write enable)

and WRDS (write disable).

Each instruction is organized by op-code block (8bits), address block

(8bits) and data

(8bits x 2).

When input level of SK pin is high level and input level of chip

select ( CS ) pin is changed from high level to low level, AK6480C/81C can receive the

instructions.

When the instructions are executed consecutively, the CS pin should be brought to high level for

a minimum of 250ns(tCS) between consecutive instruction cycle.

Instruction Set For AK6480C

Instruction

Op-Code

Address

Data

WRITE

1 0 1 0 0 1 0 A8

A7 A6 A5 A4 A3 A2 A1 A0

D15 – D0

Page Write

1 0 1 1 0 1 0 A8

A7 A6 A5 A4 A3 A2 A1 A0

D15 – D0

READ

1 0 1 0 1 0 0 A8

A7 A6 A5 A4 A3 A2 A1 A0

D15 – D0

WREN

1 0 1 0 0 0 1 1

X

X

X

X

X

X

X

X

WRDS

1 0 1 0 0 0 0 0

X

X

X

X

X

X

X

X

(WRAL)

1 0 1 0 1 1 1 1

X

X

X

X

X

X

X

X

D15 – D0

X: don't care

Instruction Set For AK6481C

Instruction

Op-Code

Address

Data

WRITE

1 0 1 0 0 1 0 A0

A1 A2 A3 A4 A5 A6 A7 A8

D0 – D15

Page Write

1 0 1 1 0 1 0 A0

A1 A2 A3 A4 A5 A6 A7 A8

D0 – D15

READ

1 0 1 0 1 0 0 A0

A1 A2 A3 A4 A5 A6 A7 A8

D0 – D15

WREN

1 0 1 0 0 0 1 1

X

X

X

X

X

X

X

X

WRDS

1 0 1 0 0 0 0 0

X

X

X

X

X

X

X

X

(WRAL)

1 0 1 0 1 1 1 1

X

X

X

X

X

X

X

X

D0 – D15

X: don't care

(Note) The WRAL instruction is used for factory function test only.

User can't use this

instruction.