w39l020 Winbond Electronics Corp America, w39l020 Datasheet - Page 13

• Manufacturer Part Number: w39l020
• Description: 256k U 8 Cmos Flash Memory
• Manufacturer: Winbond Electronics Corp America

Boot Block Lockout Enable Flow Chart
Boot Block Lockout
Feature Set Flow
address 3FFFF/0
Load data 40/70
Load data XX
address 2AAA
address 5555
address 2AAA
Load data AA
address 5555
address 5555
address 5555
Load data AA
Load data 55
Load data 80
Load data 55
to
to
to
to
to
to
to
3FFFF(XX) to lock Top Boot Block
000000(XX) to lock Bottom Boot Block
40 to lock 64K Boot Block
70 to lcok 16K Boot Block
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Publication Release Date: November 11, 2002
Pause 2mS
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W39L020
Revision A4