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W29C020CT12B Datasheet(PDF) 9 Page - Winbond |
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W29C020CT12B Datasheet(HTML) 9 Page - Winbond |
9 / 21 page W29C020C Publication Release Date: April 2000 - 9 - Revision A2 Command Codes for Boot Block Lockout Enable BYTE SEQUENCE BOOT BLOCK LOCKOUT FEATURE SET ON FIRST 8K ADDRESS BOOT BLOCK BOOT BLOCK LOCKOUT FEATURE SET ON LAST 8K 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 µS Pause 10 µS 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 8K Address Boot Block Boot Block Lockout Feature Set on Last 8K 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 commend sequence, please contact the local distributor or Winbond Electronics Corp. |
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