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M29W640DB 数据表(PDF) 46 Page - STMicroelectronics |
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M29W640DB 数据表(HTML) 46 Page - STMicroelectronics |
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46 / 49 page  M29W640DT, M29W640DB 46/49 Figure 18. In-System Equipment Group Protect Flowchart Note: 1. Block Protection Groups are shown in APPENDIX D., Table 19. and Table 20.. 2. RP can be either at VIH or at VID when using the In-System Technique to protect the Extended Block. AI05576 WRITE 60h ADDRESS = GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIL n = 0 Wait 100µs WRITE 40h ADDRESS = GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIL RP = VIH ++n = 25 START FAIL PASS YES NO DATA = 01h YES NO RP = VIH Wait 4µs READ DATA ADDRESS = GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIL RP = VID ISSUE READ/RESET COMMAND ISSUE READ/RESET COMMAND WRITE 60h ADDRESS = GROUP ADDRESS A0 = VIL, A1 = VIH, A6 = VIL |
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