W49F020-70 Winbond, W49F020-70 Datasheet - Page 9

• Manufacturer Part Number: W49F020-70
• Description: 256K X 8 CMOS FLASH MEMORY
• Manufacturer: Winbond

Command Codes for Boot Block Lockout Enable
Boot Block Lockout Enable Acquisition Flow
Notes for boot block lockout enable:
Data Format: DQ7 DQ0 (Hex)
Address Format: A14 A0 (Hex)
BYTE SEQUENCE
1 Write
2 Write
3 Write
4 Write
5 Write
6 Write
BOOT BLOCK LOCKOUT FEATURE SET
ADDRESS
2AAAH
2AAAH
5555H
5555H
5555H
5555H
Boot Block Lockout
Feature Set Flow
Pause 1 Sec.
address 2AAA
address 2AAA
address 5555
Load data AA
address 5555
address 5555
address 5555
Pause 1 Sec.
Load data AA
Load data 80
Load data 55
Load data 55
Load data 40
Exit
to
to
to
to
to
to
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DATA
AAH
AAH
55H
80H
55H
40H
Preliminary W49F020
Publication Release Date: October 1999
Revision A1