®
IS93C46A
IS93C56A
IS93C66A
ISSI
INSTRUCTION SET - IS93C56A
8-bitOrganization
16-bitOrganization
(ORG = GND)
(ORG = Vcc)
(1)
(1)
Instruction
READ
Start Bit
OP Code
Address
Input Data
Address
x(A6-A0)
11xxxxxx
Input Data
1
1
1
10
00
01
00
00
11
00
x(A7-A0)
11xxxxxxx
x(A7-A0)
—
—
WEN (Write Enable)
WRITE
—
(D7-D0) (3)
(D7-D0) (3)
—
—
(2)
x(A6-A0) (D15-D0)
01xxxxxx (D15-D0)
(2)
WRALL (Write All Registers)
WDS (Write Disable)
ERASE
1
1
1
1
01xxxxxxx
00xxxxxxx
x(A7-A0)
00xxxxxx
x(A6-A0)
10xxxxxx
—
—
—
—
ERAL (Erase All Registers)
10xxxxxxx
—
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.
INSTRUCTION SET - IS93C66A
8-bitOrganization
16-bitOrganization
(ORG = GND)
(ORG = Vcc)
(1)
(1)
Instruction
READ
Start Bit
OP Code
10
Address
Input Data
Address
Input Data
1
1
1
(A8-A0)
11xxxxxxx
(A8-A0)
—
(A7-A0)
—
—
WEN (Write Enable)
WRITE
00
—
(D7-D0) (3)
(D7-D0) (3)
—
11xxxxxx
(A7-A0)
(2)
01
(D15-D0)
(2)
WRALL (Write All Registers)
WDS (Write Disable)
ERASE
1
1
1
1
00
01xxxxxxx
00xxxxxxx
(A8-A0)
01xxxxxx (D15-D0)
00
00xxxxxx
(A7-A0)
—
—
—
11
—
ERAL (Erase All Registers)
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.
4
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
PRELIMINARYINFORMATIONRev. 00A
05/07/02