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M29W640DB 数据表(PDF) 47 Page - STMicroelectronics |
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M29W640DB 数据表(HTML) 47 Page - STMicroelectronics |
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47 / 49 page  47/49 M29W640DT, M29W640DB Figure 19. In-System Equipment Chip Unprotect Flowchart Note: Block Protection Groups are shown in APPENDIX D., Table 19. and Table 20.. AI05577 WRITE 60h ANY ADDRESS WITH A0 = VIL, A1 = VIH, A6 = VIH n = 0 CURRENT GROUP = 0 Wait 10ms WRITE 40h ADDRESS = CURRENT GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIH RP = VIH ++n = 1000 START FAIL PASS YES NO DATA = 00h YES NO RP = VIH Wait 4µs READ DATA ADDRESS = CURRENT GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIH 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 = VIL, A1 = VIH, A6 = VIH |
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