|
CAT93C56 Datasheet, PDF (6/17 Pages) ON Semiconductor – 2-Kb Microwire Serial CMOS EEPROM | |||
|
◁ |
CAT93C56, CAT93C57
The format for all instructions sent to the device is a
logical â1â start bit, a 2âbit (or 4âbit) opcode, 7âbit address
(CAT93C57) / 8âbit address (CAT93C56) (an additional bit
when organized X8) and for write operations a 16âbit data
field (8âbit for X8 organizations). The instruction format is
shown in Instruction Set table.
Table 10. INSTRUCTION SET
Instruction
Device Type
Start
Bit Opcode
Address
x8
x16
Data
x8
x16
Comments
READ
93C56 (Note 8)
1
10
93C57
1
10
A8âA0
A7âA0
A7âA0
A6âA0
Read Address
ANâA0
ERASE
93C56 (Note 8)
1
11
93C57
1
11
A8âA0
A7âA0
A7âA0
A6âA0
Clear Address
ANâA0
WRITE
93C56 (Note 8)
1
01
93C57
1
01
A8âA0
A7âA0
A7âA0
A6âA0
D7âD0
D7âD0
D15âD0
D15âD0
Write Address
ANâA0
EWEN
93C56 (Note 8)
1
00
11XXXXXXX 11XXXXXX
Write Enable
93C57
1
00
11XXXXXX
11XXXXX
EWDS
93C56 (Note 8)
1
00
00XXXXXXX 00XXXXXX
Write Disable
93C57
1
00
00XXXXXX
00XXXXX
ERAL
93C56 (Note 8)
1
93C57
1
00
10XXXXXXX 10XXXXXX
00
10XXXXXX
10XXXXX
Clear All
Addresses
WRAL
93C56 (Note 8)
1
93C57
1
00
01XXXXXXX 01XXXXXX D7âD0 D15âD0
Write All
Addresses
00
01XXXXXX
01XXXXX
D7âD0 D15âD0
8. Address bit A8 for 256x8 organization and A7 for 128x16 organization are âDonât Careâ bits, but must be kept at either a â1â or â0â for READ,
WRITE and ERASE commands.
http://onsemi.com
6
|
▷ |