
AT88RF1354 SPI User Guide For CryptoRF
®
2.10
Sleep Command [$0C]
This command activates the standby mode.
2.10.1 Command Format
No Response
Sleep ($0C)
No ISTAT transition
Command Processing
PICC
Host
Reader
Send one byte
2.10.2 Example
String Decode > O0001 Host sends one byte thru microcontroller to AT88RF1354 serial port.
>
0C
AT88RF1354 SLEEP command.
AT88RF1354 in standby mode.
No response.
No ISTAT transition.
2.10.3 Operation
The Sleep command places the reader into one of several standby modes. The reader will
remain in this mode until the SCK serial interface input transitions from low to high. Sending any
command from the host causes the reader to exit sleep mode. Any activity on the serial interface
bus will cause the IC to exit sleep mode.
The Sleep command should only be sent when the 13.56 MHz RF field is off. When the Sleep
command is received, the reader internal circuitry is placed in standby and all internal clocks are
stopped. The PLL Configuration Register ($0D) settings determine if the PLL and crystal
oscillator are disabled in standby mode.
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8586A—RFID—5/09