4
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. A
11/12/02
IS93C46A
IS93C56A
IS93C66A
ISSI
INSTRUCTION SET - IS93C56A
8-bit Organization
16-bit Organization
(ORG = GND)
(ORG = Vcc)
Instruction
Start Bit
OP Code
Address (1)
Input Data
Address (1) Input Data
READ
1
10
x(A7-A0)
—
x(A6-A0)—
WEN (Write Enable)
1
00
11xxxxxxx
—
11xxxxxx
—
WRITE
1
01
x(A7-A0)(D7-D0) (3)
x(A6-A0)(D15-D0) (2)
WRALL (Write All Registers)
1
00
01xxxxxxx
(D7-D0) (3)
01xxxxxx
(D15-D0) (2)
WDS (Write Disable)
1
00
00xxxxxxx
—
00xxxxxx
—
ERASE
1
11
x(A7-A0)
—
x(A6-A0)—
ERAL (Erase All Registers)
1
00
10xxxxxxx
—
10xxxxxx
—
INSTRUCTION SET - IS93C66A
8-bit Organization
16-bit Organization
(ORG = GND)
(ORG = Vcc)
Instruction
Start Bit
OP Code
Address (1)
Input Data
Address (1) Input Data
READ
1
10
(A8-A0)—
(A7-A0)—
WEN (Write Enable)
1
00
11xxxxxxx
—
11xxxxxx
—
WRITE
1
01
(A8-A0)(D7-D0) (3)
(A7-A0)(D15-D0) (2)
WRALL (Write All Registers)
1
00
01xxxxxxx
(D7-D0) (3)
01xxxxxx
(D15-D0) (2)
WDS (Write Disable)
1
00
00xxxxxxx
—
00xxxxxx
—
ERASE
1
11
(A8-A0)—
(A7-A0)—
ERAL (Erase All Registers)
1
00
10xxxxxxx
—
10xxxxxx
—
Notes:
1. x = Don't care bit.
2. If input data is not 16 bits exactly, the last 16 bits will be taken as input data.
3. If input data is not 8 bits exactly, the last 8 bits will be taken as input data.
Notes:
1. x = Don't care bit.
2. If input data is not 16 bits exactly, the last 16 bits will be taken as input data.
3. If input data is not 8 bits exactly, the last 8 bits will be taken as input data.