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M29W128GH70N3E Datasheet(PDF) 52 Page - Numonyx B.V |
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M29W128GH70N3E Datasheet(HTML) 52 Page - Numonyx B.V |
52 / 94 page Registers M29W128GH, M29W128GL 52/94 Figure 7. Lock register program flowchart 1. PD is the programmed data (see Table 18: Lock register bits). 2. The lock register can only be programmed once. START PASS: Write Lock Register Exit command: Add Dont' care, Data 90h Add Dont' care, Data 00h ai13677 Done YES YES NO DQ5 = 1 NO Write Unlock cycles: Add 555h, Data AAh Add 2AAh, Data 55h Unlock cycle 1 unlock cycle 2 Write Enter Lock Register command set: Add 555h, Data 40h Program Lock Register Data: Add Dont' care, Data A0h Add Dont' care(1), Data PDh Polling algorithm Device returned to Read mode FAIL Reset to return the device to Read mode |
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