AK6480C Datasheet, PDF (5/15 Pages) Asahi Kasei Microsystems – 8Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6480C/81]
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
WRITE
Page Write
READ
WREN
WRDS
(WRAL)
Op-Code
1 0 1 0 0 1 0 A8
1 0 1 1 0 1 0 A8
1 0 1 0 1 0 0 A8
10100011
10100000
10101111
Address
A7 A6 A5 A4 A3 A2 A1 A0
A7 A6 A5 A4 A3 A2 A1 A0
A7 A6 A5 A4 A3 A2 A1 A0
XXXXXXXX
XXXXXXXX
XXXXXXXX
Data
D15 – D0
D15 – D0
D15 – D0
D15 – D0
X: don't care
Instruction Set For AK6481C
Instruction
WRITE
Page Write
READ
WREN
WRDS
(WRAL)
Op-Code
1 0 1 0 0 1 0 A0
1 0 1 1 0 1 0 A0
1 0 1 0 1 0 0 A0
10100011
10100000
10101111
Address
A1 A2 A3 A4 A5 A6 A7 A8
A1 A2 A3 A4 A5 A6 A7 A8
A1 A2 A3 A4 A5 A6 A7 A8
XXXXXXXX
XXXXXXXX
XXXXXXXX
Data
D0 – D15
D0 – D15
D0 – D15
D0 – D15
X: don't care
(Note) The WRAL instruction is used for factory function test only. User can't use this
instruction.
DAS04E-00
-5-
2005/03