Preliminary W49F201

Publication Release Date: June 1999

- 9 -

Revision A1

Command Codes for Sector Erase

BYTE SEQUENCE

ADDRESS

DATA

1 Write

5555H

AAH

2 Write

2AAAH

55H

3 Write

5555H

80H

4 Write

5555H

AAH

5 Write

2AAAH

55H

6 Write

SA*

30H

Pause 200 mS

Sector 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 30

to

address SA*

Pause 200 mS

Exit

Notes for chip erase:

Data Format: DQ15-DQ8: Don't Care; DQ7

−DQ0 (Hex)

Address Format: A14

−A0 (Hex)

SA = 03XXX for parameter block1

SA = 05XXX for parameter block2

SA = 1FXXX

- for Main Memory Block when Boot Block lockout feature is activated

- for both Boot Block and Main Memory Block when Boot Block lockout feature is inactivated