W39L020 Datasheet, PDF (11/26 Pages) Winbond – 256K × 8 CMOS FLASH MEMORY

Embedded Erase Algorithm
W39L020
Start
Write Erase Command Sequence
(see below)
#Data Polling or Toggle
BitSuccessfully _Completed
Erasure Completed
Pause T EC /TSEC/TPEC
Chip Erase Command Sequence
(Address/Command):
5555H/AAH
2AAAH/55H
5555H/80H
5555H/AAH
2AAAH/55H
5555H/10H
Individual Sector Erase
Command Sequence
(Address/Command):
5555H/AAH
2AAAH/55H
5555H/80H
5555H/AAH
2AAAH/55H
Sector Address/30H
Individual Page Erase
Command Sequence
(Address/Command):
5555H/AAH
2AAAH/55H
5555H/80H
5555H/AAH
2AAAH/55H
Page Address/50H
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Publication Release Date: November 11, 2002
Revision A4