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W29C040P-90 Datasheet(PDF) 9 Page - Winbond |
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W29C040P-90 Datasheet(HTML) 9 Page - Winbond |
9 / 20 page W29C040 Publication Release Date: May 1999 - 9 - Revision A5 Command Codes for Boot Block Lockout Enable BYTE SEQUENCE BOOT BLOCK LOCKOUT FEATURE SET ON FIRST 16K ADDRESS BOOT BLOCK BOOT BLOCK LOCKOUT FEATURE SET ON LAST 16K ADDRESS BOOT BLOCK ADDRESS DATA ADDRESS DATA 0 Write 5555H AAH 5555H AAH 1 Write 2AAAH 55H 2AAAH 55H 2 Write 5555H 80H 5555H 80H 3 Write 5555H AAH 5555H AAH 4 Write 2AAAH 55H 2AAAH 55H 5 Write 5555H 40H 5555H 40H 6 Write 00000H 00H 3FFFFH FFH Pause 10 mS Pause 10 mS Boot Block Lockout Enable Acquisition 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 to address 5555 Pause 10 mS Load data 00 to address 00000 Boot Block Lockout Feature Set on First 16K Address Boot Block Boot Block Lockout Feature Set on Last 16K Address Boot Block 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 to address 5555 Pause 10 mS Load data FF to address 3FFFF Notes for boot block lockout enable: 1. Data Format: DQ7 −DQ0 (Hex) 2. Address Format: A14 −A0 (Hex) 3. If you have any questions about this command sequence, please contact the local distributor or Winbond Electronics Corp. |
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