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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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XM28C040 датащи(PDF) 7 Page - Xicor Inc. |
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XM28C040 датащи(HTML) 7 Page - Xicor Inc. |
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7 / 17 page  XM28C040 7 SOFTWARE DATA PROTECTION Figure 6. Timing Sequence—Byte or Page Write 3873 FHD F14 Figure 7. Write Sequence for Software Data Protection Regardless of whether the device has previously been protected or not, once the software data protected algorithm is used and data has been written, the device will automatically disable further writes unless another command is issued to cancel it. If no further commands are issued the device will be write protected during power-down and after any subsequent power-up. 3873 FHD F15 WRITE LAST BYTE TO LAST ADDRESS WRITE DATA 55 TO ADDRESS 2AAA WRITE DATA A0 TO ADDRESS 5555 WRITE DATA XX TO ANY ADDRESS AFTER tWC RE-ENTERS DATA PROTECTED STATE WRITE DATA AA TO ADDRESS 5555 BYTE/PAGE LOAD ENABLED CE WE (VCC) WRITE PROTECTED VCC 0V DATA ADDR. A0–A16* AA 5555 55 2AAA A0 5555 ≤t BLC MAX WRITES OK BYTE OR PAGE *A17 & A18 select one of four devices on the module. tWC |
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