W49F020 데이터 시트보기 (PDF) - Winbond

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W49F020

256K x 8 CMOS FLASH MEMORY

Winbond 

Preliminary W49F020

Command Codes for Boot Block Lockout Enable

BYTE SEQUENCE

BOOT BLOCK LOCKOUT FEATURE SET

ADDRESS

DATA

1 Write

2 Write

3 Write

4 Write

5 Write

6 Write

5555H

2AAAH

5555H

5555H

2AAAH

5555H

Pause 1 Sec.

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.

Notes for boot block lockout enable:

Data Format: DQ7−DQ0 (Hex)

Address Format: A14−A0 (Hex)

Exit

Publication Release Date: October 1999

-9-

Revision A1

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