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X28HC64JM-70 Datasheet(PDF) 8 Page - Intersil Corporation |
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X28HC64JM-70 Datasheet(HTML) 8 Page - Intersil Corporation |
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8 / 16 page  8 FN8109.0 June 1, 2005 RESETTING SOFTWARE DATA PROTECTION Figure 8. Reset Software Data Protection Timing Sequence Figure 9. Software Sequence to Deactivate Software Data Protection In the event the user wants to deactivate the software data protection feature for testing or reprogramming in an EEPROM programmer, the following six step algo- rithm will reset the internal protection circuit. After tWC, the X28HC64 will be in standard operating mode. Note: Once initiated, the sequence of write operations should not be interrupted. CE WE Standard Operating Mode VCC Data ADDR AAA 1555 55 0AAA 80 1555 ≥t WC AA 1555 55 0AAA 20 1555 Write Data 55 to Address 0AAA Write Data 55 to Address 0AAA Write Data 80 to Address 1555 Write Data AA Address 1555 Write Data 20 to Address 1555 Write Data AA to Address 1555 X28HC64 |
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