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AT45DB081D Folha de dados(PDF) 21 Page - ATMEL Corporation

Nome de Peças AT45DB081D
Descrição Electrónicos  8-megabit 2.5-volt or 2.7-volt DataFlash
PDF  53 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB081D Folha de dados(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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