CAT93C57 CATALYST [Catalyst Semiconductor], CAT93C57 Datasheet - Page 6

• Manufacturer Part Number: CAT93C57
• Description: 2-Kb Microwire Serial CMOS EEPROM
• Manufacturer: CATALYST [Catalyst Semiconductor]

CAT93C56, CAT93C57
The format for all instructions sent to the device is a
logical “1” start bit, a 2-bit (or 4-bit) opcode, 7-bit
address (CAT93C57) / 8-bit address (CAT93C56) (an
additional bit when organized X8) and for write
INSTRUCTION SET
Note:
(1) Address bit A8 for 256x8 organization and A7 for 128x16 organization are "Don't Care" bits, but must be kept at either a "1" or "0" for
Doc. No. MD-1088 Rev. P
Instruction
ERASE
WRITE
EWEN
EWDS
WRAL
READ
ERAL
READ, WRITE and ERASE commands.
93C56
93C56
93C56
93C56
93C56
93C56
93C56
Device
93C57
93C57
93C57
93C57
93C57
93C57
93C57
Type
(1)
(1)
(1)
(1)
(1)
(1)
(1)
Start
Bit
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Opcode
10
10
11
11
01
01
00
00
00
00
00
00
00
00
11XXXXXXX
00XXXXXXX
10XXXXXXX
01XXXXXXX
11XXXXXX
00XXXXXX
10XXXXXX
01XXXXXX
A8-A0
A7-A0
A8-A0
A7-A0
A8-A0
A7-A0
x8
Address
6
operations a 16-bit data field (8-bit for X8 organi–
zations). The instruction format is shown in Instruction
Set table.
11XXXXXX
00XXXXXX
10XXXXXX
01XXXXXX
11XXXXX
00XXXXX
10XXXXX
01XXXXX
A7-A0
A6-A0
A7-A0
A6-A0
A7-A0
A6-A0
x16
D7-D0
D7-D0
D7-D0
D7-D0
x8
Data
Characteristics subject to change without notice
D15-D0
D15-D0
D15-D0
D15-D0
x16
© Catalyst Semiconductor, Inc.
Read Address
Clear Address
Write Address
Write Disable
Write Enable
Comments
Addresses
Addresses
Clear All
Write All
AN–A0
AN–A0
AN–A0