User Manual

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W29C040

Publication Release Date: May 1999

- 7 - Revision A5

Command Codes for Software Chip Erase

BYTE SEQUENCE ADDRESS DATA

0 Write 5555H AAH

1 Write 2AAAH 55H

2 Write 5555H 80H

3 Write 5555H AAH

4 Write 2AAAH 55H

5 Write 5555H 10H

Software Chip Erase Acquisition 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 10

to

address 5555

Pause 50 mS

Exit

Notes for software chip erase:

Data Format: DQ7−DQ0 (Hex)

Address Format: A14−A0 (Hex)