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X28VC256DM-90 Scheda tecnica(PDF) 5 Page - Xicor Inc.

Il numero della parte X28VC256DM-90
Spiegazioni elettronici  5 Volt, Byte Alterable E2PROM
PDF  24 Pages
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Produttore elettronici  XICOR [Xicor Inc.]
Homepage  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28VC256DM-90 Scheda tecnica(HTML) 5 Page - Xicor Inc.

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X28VC256
5
THE TOGGLE BIT I/O6
Figure 4. Toggle Bit Bus Sequence
3869 FHD F14
Figure 5. Toggle Bit Software Flow
The Toggle Bit can eliminate the software housekeeping
chore of saving and fetching the last address and data
written to a device in order to implement
DATA Polling.
This can be especially helpful in an array comprised of
multiple X28VC256 memories that is frequently up-
dated. The timing diagram in Figure 4 illustrates the
sequence of events on the bus. The software flow
diagram in Figure 5 illustrates a method for polling the
Toggle Bit.
3869 FHD F15
LOAD ACCUM
FROM ADDR n
COMPARE
ACCUM WITH
ADDR n
X28VC256
READY
COMPARE
OK?
NO
YES
LAST WRITE
YES
CE
OE
WE
I/O6
X28VC256
READY
VOH
VOL
LAST
WRITE
HIGH Z
* I/O6 beginning and ending state of I/O6 will vary.
*
*



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