AK93C85A Datasheet, PDF (4/13 Pages) Asahi Kasei Microsystems – 16K / 32K / 64KBIT SERIAL CMOS EEPROM

ASAHI KASEI
[AK93C85A/95A/10A]
Functional Description
The AK93C85A/95A/10A has 4 instructions such as READ, WRITE, EWEN and EWDS. A valid instruction
consists of a Start Bit (Logic"1"), the appropriate Op Code and the desired memory Address location.
The CS pin must be brought low for a minimum of 250ns (Tcs) between each instruction when the instruction
is continuously executed.
Instruc-
tion
READ
WRITE
EWEN
EWDS
WRAL
Start
Bit
1
1
1
1
1
Op
Address
Data
Comments
Code
10 A9-A0
D15-D0 Reads data stored in memory, at specified address.
01 A9-A0
D15-D0 Writes register.
00 11XXXXXXXX
Write enable must precede all programming modes.
00 00XXXXXXXX
Disables all programming instructions.
00 01XXXXXXXX D15-D0 Writes all registers.
table1. Instruction Set for the AK93C85A
Instruc-
tion
READ
WRITE
EWEN
EWDS
WRAL
Start
Bit
1
1
1
1
1
Op
Address
Data
Comments
Code
10 A10-A0
D15-D0 Reads data stored in memory, at specified address.
01 A10-A0
D15-D0 Writes register.
00 11XXXXXXXXX
Write enable must precede all programming modes.
00 00XXXXXXXXX
Disables all programming instructions.
00 01XXXXXXXXX D15-D0 Writes all registers.
table2. Instruction Set for the AK93C95A
Instruc-
tion
READ
WRITE
EWEN
EWDS
WRAL
Start
Bit
1
1
1
1
1
Op
Address
Data
Comments
Code
10 A11-A0
D15-D0 Reads data stored in memory, at specified address.
01 A11-A0
D15-D0 Writes register.
00 11XXXXXXXXXX
Write enable must precede all programming modes.
00 00XXXXXXXXXX
Disables all programming instructions.
00 01XXXXXXXXXX D15-D0 Writes all registers.
table3. Instruction Set for the AK93C10A
(Note)
The WRAL instruction are used for factory function test only.
User can't use the WRAL instruction.

The AK93C85A/95A/10A perceives the start bit in the logic"1" and also "01".
DAM02E-01
-4-
1999/10