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X28C256DM Fiches technique(PDF) 4 Page - Xicor Inc.

No de pièce X28C256DM
Description  5 Volt, Byte Alterable E2PROM
PDF  24 Pages
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Fabricant  XICOR [Xicor Inc.]
Site Internet  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28C256DM Fiches technique(HTML) 4 Page - Xicor Inc.

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4
X28C256
DATA POLLING I/O7
Figure 2.
DATA Polling Bus Sequence
Figure 3.
DATA Polling Software Flow
3855 FHD F13
DATA Polling can effectively halve the time for writing to
the X28C256. 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.
3855 FHD F12
CE
OE
WE
I/O7
X28C256
READY
LAST
WRITE
HIGH Z
VOL
VIH
A0–A14
An
An
An
An
An
An
VOH
An
WRITE DATA
SAVE LAST DATA
AND ADDRESS
READ LAST
ADDRESS
IO7
COMPARE?
X28C256
READY
NO
YES
WRITES
COMPLETE?
NO
YES



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