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M29DW641F Datasheet(PDF) 78 Page - Numonyx B.V |
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M29DW641F Datasheet(HTML) 78 Page - Numonyx B.V |
78 / 80 page ![]() High voltage Block Protection M29DW641F 78/80 Figure 25. In-System equipment Chip Unprotect flowchart 1. Block Protection Groups are shown in Appendix D, Table 28. AI07759c WRITE 60h ANY ADDRESS WITH A0, A2, A3 = VIL, A1, A6 = VIH n = 0 CURRENT GROUP = 0 Wait 10ms WRITE 40h ADDRESS = CURRENT GROUP ADDRESS A0, A2, A3 = VIL, A1 = VIH, A6 = VIL RP = VIH ++n = 1000 START FAIL PASS NO DATA = 00h YES NO RP = VIH Wait 4µs READ DATA ADDRESS = CURRENT GROUP ADDRESS A0, A2, A3 = VIL, A1 = VIH, A6 = VIL RP = VID ISSUE READ/RESET COMMAND ISSUE READ/RESET COMMAND PROTECT ALL GROUPS INCREMENT CURRENT GROUP LAST GROUP YES NO WRITE 60h ANY ADDRESS WITH A0, A2, A3, A6 = VIL, A1 = VIH YES |
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