W29C102 Datasheet, PDF (6/21 Pages) Winbond – 64K 16 CMOS FLASH MEMORY

W29C102
Command Codes for Software Data Protection
BYTE SEQUENCE
TO ENABLE PROTECTION
ADDRESS
DATA
0 Write
5555H
AAAAH
1 Write
2AAAH
5555H
2 Write
5555H
A0A0H
3 Write
-
-
4 Write
-
-
5 Write
-
-
TO DISABLE PROTECTION
ADDRESS
DATA
5555H
AAAAH
2AAAH
5555H
5555H
8080H
5555H
AAAAH
2AAAH
5555H
5555H
2020H
Software Data Protection Acquisition Flow
Software Data Protection
Enable Flow
Load data AAAA
to
address 5555
Software Data Protection
Disable Flow
Load data AAAA
to
address 5555
Load data 5555
to
address 2AAA
Load data 5555
to
address 2AAA
Load data A0A0
to
address 5555
Load data 8080
to
address 5555
(Optional page-load
operation)
Sequentially load
up to 128 words
of page data
Pause 10 mS
Load data AAAA
to
address 5555
Load data 5555
to
address 2AAA
Exit
Load data 2020
to
address 5555
Pause 10 mS
Exit
Notes for software program code:
Data Format: DQ15−DQ0 (Hex)
Address Format: A14−A0 (Hex)
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