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X28HC256DMB-15 Datasheet(PDF) 6 Page - Intersil Corporation |
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X28HC256DMB-15 Datasheet(HTML) 6 Page - Intersil Corporation |
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6 / 20 page  6 FN8108.2 May 7, 2007 DATA Polling I/O7 DATA Polling can effectively halve the time for writing to the X28HC256. The timing diagram in Figure 2 illustrates the sequence of events on the bus. The software flow diagram in Figure 3 illustrates one method of implementing the routine. CE OE WE I/O7 X28HC256 READY LAST WRITE HIGH Z VOL VIH A0 TO A14 An An An An An An VOH An FIGURE 2. DATA POLLING BUS SEQUENCE WRITE DATA SAVE LAST DATA AND ADDRESS READ LAST ADDRESS IO7 COMPARE? X28HC256 NO YES WRITES COMPLETE? NO YES READY FIGURE 3. DATA POLLING SOFTWARE FLOW X28HC256 |
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