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X88064SI Datasheet(PDF) 5 Page - Xicor Inc. |
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X88064SI Datasheet(HTML) 5 Page - Xicor Inc. |
5 / 15 page X88064 5 PAGE WRITE OPERATION Regardless of the microcontroller employed, the X88064 supports page mode write operations. This allows the microcontroller to write from one to thirty-two bytes of data to the X88064. Each individual write within a page write operation must conform to the byte write timing requirements. The falling edge of WR starts a timer delaying the internal programming cycle 100 µs. There- fore, each successive write operation must begin within 100 µs of the last byte written. The following waveforms illustrate the sequence and timing requirements. Page Write Timing Sequence for WR Controller Operation Notes: (1) For each successive write within a page write cycle A5–A12 must be the same. tBLC CE ALE A/D0 –A/D 7 A8 –A12 WR PSEN(RD) AIN DIN A12=n OPERATION BYTE 0 BYTE 1 BYTE 2 LAST BYTE READ (1) AFTER tWC READY FOR NEXT WRITE OPERATION tWC 7023 FRM F04 AIN DIN A12=n AIN DIN A12=n AIN DIN A12=n AIN DOUT A12=x AIN ADDR AIN Next Address |
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