W39V040FB Datasheet, PDF (13/33 Pages) Winbond – 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE

9.2 Embedded Erase Algorithm
W39V040FB
Start
Write Erase Command Sequence
(see below)
#Data Polling or Toggle Bit
Erasure Completed
Individual Sector Erase
Command Sequence
(Address/Command):
5555H/AAH
2AAAH/55H
5555H/80H
5555H/AAH
2AAAH/55H
Sector Address/30H
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Publication Release Date: April 14, 2005
Revision A3