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X28C64DM 데이터시트(PDF) 5 Page - Xicor Inc.

부품명 X28C64DM
상세설명  5 Volt, Byte Alterable E2PROM
PDF  25 Pages
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제조업체  XICOR [Xicor Inc.]
홈페이지  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28C64DM 데이터시트(HTML) 5 Page - Xicor Inc.

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X28C64
5
The Toggle Bit I/O6
Figure 4. Toggle Bit Bus Sequence
CE
OE
WE
I/O6
X28C64
READY
VOH
VOL
LAST
WRITE
HIGH Z
* Beginning and ending state of I/O6 will vary.
*
*
3853 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 X28C64 memories that is frequently updated.
Toggle Bit Polling can also provide a method for status
checking in multiprocessor applications. 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.
3853 FHD F15
LOAD ACCUM
FROM ADDR n
COMPARE
ACCUM WITH
ADDR n
X28C64
READY
COMPARE
OK?
NO
YES
LAST WRITE



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