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X28C512TI-20 Datasheet(PDF) 8 Page - Xicor Inc. |
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X28C512TI-20 Datasheet(HTML) 8 Page - Xicor Inc. |
8 / 25 page 8 X28C512/X28C513 Resetting Software Data Protection Figure 5a. Reset Software Data Protection Timing Sequence Figure 5b. 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 E2PROM programmer, the following six step algo- rithm will reset the internal protection circuit. After tWC, the X28C512/513 will be in standard operating mode. Note: Once initiated, the sequence of write operations should not be interrupted. 3856 FHD F13 CE WE STANDARD OPERATING MODE VCC DATA ADDR AA 5555 55 2AAA 80 5555 NOTE: All other timings and control pins are per page write timing requirements. ≥t WC AA 5555 55 2AAA 20 5555 WRITE DATA 55 TO ADDRESS 2AAA 3856 FHD F14 WRITE DATA 55 TO ADDRESS 2AAA WRITE DATA 80 TO ADDRESS 5555 WRITE DATA AA TO ADDRESS 5555 WRITE DATA 20 TO ADDRESS 5555 WRITE DATA AA TO ADDRESS 5555 |
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