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W29C020T-12A Datasheet(PDF) 6 Page - Winbond |
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W29C020T-12A Datasheet(HTML) 6 Page - Winbond |
6 / 21 page W29C020 - 6 - Command Codes for Software Data Protection BYTE SEQUENCE TO ENABLE PROTECTION TO DISABLE PROTECTION ADDRESS DATA ADDRESS DATA 0 Write 5555H AAH 5555H AAH 1 Write 2AAAH 55H 2AAAH 55H 2 Write 5555H A0H 5555H 80H 3 Write - - 5555H AAH 4 Write - - 2AAAH 55H 5 Write - - 5555H 20H Software Data Protection Acquisition Flow Software Data Protection Enable Flow Load data AA to address 5555 Load data 55 to address 2AAA Load data A0 to address 5555 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 20 to address 5555 Software Data Protection Disable Flow Sequentially load up to 128 bytes of page data Pause 10 mS Exit Pause 10 mS Exit (Optional page-load operation) Notes for software program code: Data Format: DQ7 −DQ0 (Hex) Address Format: A14 −A0 (Hex) |
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