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X28C64S-15 参数 Datasheet PDF下载

X28C64S-15图片预览
型号: X28C64S-15
PDF下载: 下载PDF文件 查看货源
内容描述: 5伏,可变的字节E2PROM [5 Volt, Byte Alterable E2PROM]
分类和应用: 存储内存集成电路光电二极管可编程只读存储器电动程控只读存储器电可擦编程只读存储器
文件页数/大小: 25 页 / 112 K
品牌: XICOR [ XICOR INC. ]
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X28C64  
The Toggle Bit I/O  
6
Figure 4. Toggle Bit Bus Sequence  
LAST  
WRITE  
WE  
CE  
OE  
V
OH  
HIGH Z  
I/O  
6
*
*
V
OL  
X28C64  
READY  
* Beginning and ending state of I/O will vary.  
6
3853 FHD F14  
Figure 5. Toggle Bit Software Flow  
TheToggleBitcaneliminatethesoftwarehousekeeping  
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  
diagraminFigure4illustratesthesequenceofeventson  
thebus. ThesoftwareflowdiagraminFigure5illustrates  
a method for polling the Toggle Bit.  
LAST WRITE  
LOAD ACCUM  
FROM ADDR n  
COMPARE  
ACCUM WITH  
ADDR n  
NO  
COMPARE  
OK?  
YES  
X28C64  
READY  
3853 FHD F15  
5