CAT93C56_07 Datasheet, PDF (6/18 Pages) Catalyst Semiconductor – 2-Kb Microwire Serial CMOS EEPROM

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
operations a 16-bit data field (8-bit for X8 organi–
zations). The instruction format is shown in Instruction
Set table.
INSTRUCTION SET
Device
Instruction Type
READ 93C56⁽¹⁾
ERASE
93C57
93C56⁽¹⁾
WRITE
93C57
93C56⁽¹⁾
EWEN
93C57
93C56⁽¹⁾
EWDS
93C57
93C56⁽¹⁾
ERAL
93C57
93C56⁽¹⁾
WRAL
93C57
93C56⁽¹⁾
93C57
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
Address
x8
x16
A8-A0
A7-A0
A7-A0
A6-A0
A8-A0
A7-A0
A7-A0
A6-A0
A8-A0
A7-A0
A7-A0
A6-A0
11XXXXXXX 11XXXXXX
11XXXXXX 11XXXXX
00XXXXXXX 00XXXXXX
00XXXXXX 00XXXXX
10XXXXXXX 10XXXXXX
10XXXXXX 10XXXXX
01XXXXXXX 01XXXXXX
01XXXXXX 01XXXXX
Data
x8
x16
D7-D0
D7-D0
D15-D0
D15-D0
D7-D0
D7-D0
D15-D0
D15-D0
Comments
Read Address
AN–A0
Clear Address
AN–A0
Write Address
AN–A0
Write Enable
Write Disable
Clear All
Addresses
Write All
Addresses
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
READ, WRITE and ERASE commands.
Doc. No. MD-1088 Rev. P
6
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice