AK9822 Datasheet, PDF (6/17 Pages) Asahi Kasei Microsystems – 2K / 4Kbit EEPROM with 2ch 8bit D/A Converter

ASAHI KASEI
[AK9822/24]
Instruction Set
The AK9822/24 has 7 instructions such as READ, WRITE, WREN, WRDS, PDEN, PDDS, CALL.
Each instruction consists of Op-code, address and data. The instruction set is shown in the table4
and table5.
When the instructions are executed consecutively, the CS pin should be brought to a high level for a
minimum of tCS between consecutive instruction cycle.
Instruction
Op-code
Address
Data
READ
WRITE
WREN
WRDS
PDEN
PDDS
CALL
TEST
10101000
10100100
10100011
10100000
10101100
10100110
10100010
10101111
A6 A5 A4 A3 A2 A1 A0 0
A6 A5 A4 A3 A2 A1 A0 0
********
********
********
********
A6 A5 A4 A3 A2 A1 A0 0
********
D15∼D0
D15∼D0
*^∼
*^∼
*^∼
*^∼
*^∼
*^∼
(note) User can't use this instruction.
Table4. Instruction set for AK9822
Comments
read memory
write memory
write enable
write disable
power down enable
power down disable
set DAC outputs
TEST (note)
*: Don't Care
Instruction
Op-code
Address
Data
READ
WRITE
WREN
WRDS
PDEN
PDDS
CALL
TEST
10101000
10100100
10100011
10100000
10101100
10100110
10100010
10101111
A7 A6 A5 A4 A3 A2 A1 A0
A7 A6 A5 A4 A3 A2 A1 A0
********
********
********
********
A7 A6 A5 A4 A3 A2 A1 A0
********
D15∼D0
D15∼D0
*^∼
*^∼
*^∼
*^∼
*^∼
*^∼
(note) User can't use this instruction.
Table5. Instruction set for AK9824
Comments
read memory
write memory
write enable
write disable
power down enable
power down disable
set DAC outputs
TEST (note)
*: Don't Care
DAD01E-00
-6-
1999/05