參數(shù)資料
型號(hào): X28C64EI-25
英文描述: 5 Volt, Byte Alterable E2PROM
中文描述: 5伏,可變E2PROM的字節(jié)
文件頁數(shù): 5/25頁
文件大?。?/td> 110K
代理商: X28C64EI-25
X28C64
5
The Toggle Bit I/O
6
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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