Rainbow Electronics W49F020 - Manual (Page 7)

Preliminary W49F020
Publication Release Date: October 1999
- 7 - Revision A1
Command Codes for Chip 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 5555H 10H
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
Exit
Pause 1 Sec.
Load data 10
to
address 5555
Notes for chip erase:
Data Format: DQ7 − DQ0 (Hex)
Address Format: A14 − A0 (Hex)