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XM28C040 データシート(PDF) 5 Page - Xicor Inc.

部品番号 XM28C040
部品情報  5 Volt, Byte Alterable E2PROM
PDF  17 Pages
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メーカー  XICOR [Xicor Inc.]
ホームページ  http://www.xicor.com
Logo XICOR - Xicor Inc.

XM28C040 データシート(HTML) 5 Page - Xicor Inc.

  XM28C040 Datasheet HTML 1Page - Xicor Inc. XM28C040 Datasheet HTML 2Page - Xicor Inc. XM28C040 Datasheet HTML 3Page - Xicor Inc. XM28C040 Datasheet HTML 4Page - Xicor Inc. XM28C040 Datasheet HTML 5Page - Xicor Inc. XM28C040 Datasheet HTML 6Page - Xicor Inc. XM28C040 Datasheet HTML 7Page - Xicor Inc. XM28C040 Datasheet HTML 8Page - Xicor Inc. XM28C040 Datasheet HTML 9Page - Xicor Inc. Next Button
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XM28C040
5
THE TOGGLE BIT I/O6
Figure 4. Toggle Bit Bus Sequence
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 XM28C040 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 testing the
Toggle Bit.
3873 FHD F12
3873 FHD F13
CE
OE
WE
I/O6
READY
VOH
VOL
LAST
WRITE
HIGH Z
* Beginning and ending state of I/O6 will vary.
*
*
LOAD ACCUM
FROM ADDR n
COMPARE
ACCUM WITH
ADDR n
READY
COMPARE
OK?
NO
YES
LAST WRITE



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