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參數(shù)資料
X28HC64
5
THE TOGGLE BIT I/O
6
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 X28HC64 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.
3857 FHD F15
LOAD ACCUM
FROM ADDR n
COMPARE
ACCUM WITH
ADDR n
READY
COMPARE
OK
NO
YES
LAST WRITE
3857 FHD F14
CE
OE
WE
I/O6
X28HC64
READY
VOH
VOL
LAST
WRITE
HIGH Z
* Beginning and ending state of I/O6 will vary.
*
*
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| X28HC64TI-70 | 5 Volt, Byte Alterable EEPROM |
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| X28HC64TM-12 | 5 Volt, Byte Alterable EEPROM |
| X28HC64TM-70 | 5 Volt, Byte Alterable EEPROM |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| X28HC64TI-50 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:5 Volt, Byte Alterable E2PROM |
| X28HC64TI-55 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EEPROM |
| X28HC64TI-70 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:5 Volt, Byte Alterable E2PROM |
| X28HC64TI-90 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:5 Volt, Byte Alterable EEPROM |
| X28HC64TM-12 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:5 Volt, Byte Alterable E2PROM |
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