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X28C64DI Fiches technique(PDF) 4 Page - Xicor Inc.

No de pièce X28C64DI
Description  5 Volt, Byte Alterable E2PROM
PDF  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  XICOR [Xicor Inc.]
Site Internet  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28C64DI Fiches technique(HTML) 4 Page - Xicor Inc.

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4
X28C64
DATA Polling I/O7
Figure 2.
DATA Polling Bus Sequence
CE
OE
WE
I/O7
X28C64
READY
LAST
WRITE
HIGH Z
VOL
VIH
A0–A12
An
An
An
An
An
An
VOH
An
3853 FHD F12
Figure 3.
DATA Polling Software Flow
DATA Polling can effectively halve the time for writing to
the X28C64. 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.
3853 FHD F13
WRITE DATA
SAVE LAST DATA
AND ADDRESS
READ LAST
ADDRESS
IO7
COMPARE?
X28C64
READY
NO
YES
WRITES
COMPLETE?
NO
YES



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