W29C020-90A 查看數據表（PDF） - Winbond

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W29C020-90A

256K x 8 CMOS FLASH MEMORY

Winbond 

W29C020

Command Codes for Software Chip Erase

BYTE SEQUENCE

0 Write

1 Write

2 Write

3 Write

4 Write

5 Write

ADDRESS

5555H

2AAAH

5555H

5555H

2AAAH

5555H

Software Chip Erase Acquisition Flow

Load data AA

to

address 5555

DATA

AAH

55H

80H

AAH

55H

10H

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 10

to

address 5555

Pause 50 mS

Exit

Notes for software chip erase:

Data Format: DQ7−DQ0 (Hex)

Address Format: A14−A0 (Hex)

Publication Release Date: February 1998

-7-

Revision A3

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