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AT45DB321E Datasheet(PDF) 26 Page - List of Unclassifed Manufacturers

Part # AT45DB321E
Description  32-Mbit DataFlash (with Extra 1-Mbits), 2.3V Minimum SPI Serial Flash Memory
PDF  72 Pages
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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AT45DB321E Datasheet(HTML) 26 Page - List of Unclassifed Manufacturers

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AT45DB321E
8784E–DFLASH–10/2013
8.2.2
Reading the Security Register
To read the Security Register, an opcode of 77h and three dummy bytes must be clocked into the device. After the last
dummy bit has been clocked in, the contents of the Security Register can be clocked out on the SO pin. After the last
byte of the Security Register has been read, additional pulses on the SCK pin will result in undefined data being output
on the SO pin.
Deasserting the CS pin will terminate the Read Security Register operation and put the SO pin into a high-impedance
state.
Figure 8-5. Read Security Register
77h
XX
XX
XX
Data
n
Data
n + 1
CS
Data
n + x
SI
SO
Each transition represents eight bits



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