W39V040FC Datasheet, PDF (16/36 Pages) Winbond – 512K × 8 CMOS FLASH MEMORY WITH FWH INTERFACE

10. EMBEDDED ERASE ALGORITHM
W39V040FC
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
OR
Page Address/50H
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