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MX29LV040QC-70 Datasheet(PDF) 37 Page - Macronix International |
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MX29LV040QC-70 Datasheet(HTML) 37 Page - Macronix International |
37 / 51 page 37 P/N:PM0722 MX29LV040 REV. 0.7, JUL. 12, 2001 Figure 17. CHIP UNPROTECTION ALGORITHM START Protect All Sectors PLSCNT=1 Chip Unprotect Complete Data=00H? Yes Set OE=A9=VID CE=VIL,A6=1 Activate WE Pulse Time Out 50ms Set OE=CE=VIL A9=VID,A1=1 Set Up First Sector Addr All sectors have been verified? Remove VID from A9 Write Reset Command Device Failed PLSCNT=1000? No Increment PLSCNT No Read Data from Device Yes Yes No Increment Sector Addr * It is recommended before unprotect whole chip, all sectors should be protected in advance. |
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