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X28VC256DM-90 데이터시트(PDF) 5 Page - Xicor Inc.

부품명 X28VC256DM-90
상세설명  5 Volt, Byte Alterable E2PROM
PDF  24 Pages
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제조업체  XICOR [Xicor Inc.]
홈페이지  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28VC256DM-90 데이터시트(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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