Preliminary W49L201

Publication Release Date: May 2000

- 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

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*

Exit

Notes for chip erase:

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

−DQ0 (Hex)

Address Format: A14

−A0 (Hex)

A16 - A12 = 00011, for 8Kword Parameter Block1 (Sector-1)

A16 - A12 = 00101, for 8Kword Parameter Block2 (Sector-2)

A16 - A12 = 11111,

- for 104Kword Main Memory Block when Boot Block lockout feature is activated.

- for 104Kword Main Memory Block and 8Kword Boot Block when Boot Block lockout feature is inactivated.