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93C465AT-E/MC 参数 Datasheet PDF下载

93C465AT-E/MC图片预览
型号: 93C465AT-E/MC
PDF下载: 下载PDF文件 查看货源
内容描述: 1K - 16K与Microwire兼容串行EEPROM [1K-16K Microwire Compatible Serial EEPROMs]
分类和应用: 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: 38 页 / 703 K
品牌: MICROCHIP [ MICROCHIP ]
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93XX46X/56X/66X/76X/86X  
3.6  
ERASE/WRITE DISABLE And  
ENABLE (EWDS/EWEN)  
The 93XX series devices power-up in the Erase/Write  
Disable (EWDS) state. All programming modes must  
be preceded by an Erase/Write Enable (EWEN) instruc-  
tion. Once the EWENinstruction is executed, program-  
ming remains enabled until an EWDS instruction is  
executed or VCC is removed from the device.  
To protect against accidental data disturbance, the  
EWDSinstruction can be used to disable all Erase/Write  
functions and should follow all programming  
operations. Execution of  
a READ instruction is  
independent of both the EWENand EWDSinstructions.  
FIGURE 3-5:  
EWDS TIMING  
TCSL  
CS  
CLK  
•••  
1
0
0
0
0
x
x
DI  
FIGURE 3-6:  
EWEN TIMING  
TCSL  
CS  
CLK  
•••  
1
0
0
1
1
x
x
DI  
© 2007 Microchip Technology Inc.  
DS21929D-page 13  
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