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AT45DB081D 데이터시트(PDF) 21 Page - ATMEL Corporation

부품명 AT45DB081D
상세설명  8-megabit 2.5-volt or 2.7-volt DataFlash
PDF  53 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB081D 데이터시트(HTML) 21 Page - ATMEL Corporation

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3596E–DFLASH–02/07
AT45DB081D
10.2.2
Reading the Security Register
The Security Register can be read by first asserting the CS pin and then clocking in an opcode
of 77H followed by three dummy bytes. After the last don’t care bit has been clocked in, the con-
tent 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 simply result in undefined data
being output on the SO pins.
Deasserting the CS pin will terminate the Read Security Register operation and put the SO pin
into a high-impedance state.
Figure 10-4. Read Security Register
Opcode
X
X
X
Data Byte
n
Data Byte
n + 1
CS
Data Byte
n + x
Each transition
represents 8 bits
SI
SO



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