W29C040-90B Ver la hoja de datos (PDF) - Winbond

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Fabricante

W29C040-90B

512K ·8 CMOS FLASH MEMORY

Winbond 

W29C040

Command Codes for Boot Block Lockout Enable

BYTE SEQUENCE

0 Write

1 Write

2 Write

3 Write

4 Write

5 Write

6 Write

BOOT BLOCK LOCKOUT FEATURE SET

ON FIRST 16K ADDRESS BOOT BLOCK

ADDRESS

DATA

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

5555H

40H

00000H

00H

Pause 10 mS

BOOT BLOCK LOCKOUT FEATURE SET

ON LAST 16K ADDRESS BOOT BLOCK

ADDRESS

DATA

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

5555H

40H

7FFFFH

FFH

Pause 10 mS

Boot Block Lockout Enable Acquisition Flow

Boot Block Lockout

Feature Set on First 16K

Address Boot Block

Boot Block Lockout

Feature Set on Last 16K

Address Boot Block

Load data AA

to

address 5555

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data 55

to

address 2AAA

Load data 80

to

address 5555

Load data 80

to

address 5555

Load data AA

to

address 5555

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data 40

to

address 5555

Load data 55

to

address 2AAA

Load data 40

to

address 5555

Load data 00

to

address 00000

Load data FF

to

address 7FFFF

W ait for 10 mS

W ait for 10 mS

Notes for boot block lockout enable:

1. Data Format: DQ 7 − DQ0 (Hex)

2. Address Format: A14 − A0 (Hex)

3. If you have any questions about this command sequence, please contact the local distributor or Winbond Electronics Corp.

Publication Release Date: May 6, 2002

-9-

Revision A9

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