W49F102 Datasheet, PDF (10/21 Pages) Winbond – 64K X 16 CMOS FLASH MEMORY

Command Codes for Boot Block Lockout Enable
BYTE SEQUENCE
1 Write
2 Write
3 Write
4 Write
5 Write
6 Write
BOOT BLOCK LOCKOUT FEATURE SET
ADDRESS
5555H
2AAAH
5555H
5555H
2AAAH
5555H
Pause 1 Sec.
DATA
AAH
55H
80H
AAH
55H
40H
Boot Block Lockout Enable Acquisition Flow
Boot Block Lockout
Feature Set Flow
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 80
to
address 5555
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 40
to
address 5555
Pause 1 Sec.
Exit
Notes for boot block lockout enable:
Data Format: DQ15-DQ8 Don't Care), DQ7−DQ0 (Hex)
Address Format: A14−A0 (Hex)
- 10 -
W49F102