X28C010 データシートの表示（PDF） - Xicor -> Intersil
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X28C010 Datasheet PDF : 25 Pages
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X28C010
DATA Polling I/O7
Figure 2. DATA Polling Bus Sequence
LAST
WE WRITE
CE
OE
VIH
I/O7
A0–A14
An
HIGH Z
VOL
An
An
An
Figure 3. DATA Polling Software Flow
WRITE DATA
VOH
X28C010
READY
An
An
An
3858 FHD F12
DATA Polling can effectively halve the time for writing to
the X28C010. 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 implement-
ing the routine.
WRITES
NO
COMPLETE?
YES
SAVE LAST DATA
AND ADDRESS
READ LAST
ADDRESS
I/O7
NO
COMPARE?
YES
X28C010
READY
3858 FHD F13
4
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