W39L040 Datasheet, PDF (13/27 Pages) Winbond – 512 K X 8 CMOS FLASH MEMORY

Boot Block Lockout Enable Flow Chart
Boot Block Lockout
Feature Set 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 40/70
to
address 5555
40 to lock 64K Boot Block
70 to lcok 16K Boot Block
Load data XX
to
address 7FFFF/0
7FFFF(XX) to lock Top Boot Block
000000(XX) to lock Bottom Boot Block
W39L040
Pause 2 mS
Exit
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Publication Release Date: February 10, 2003
Revision A3