A-1
8586A—RFID—5/09
Appendix A
Initialization Procedure
The procedure for initializing the AT88RF1354 RF Reader is outlined here, starting from power
up. The same general procedure applies when the IC ResetB pin is toggled (starting at step 2).
1. Turn Power On to both Vcc and Vcc_Ant.
2. Drive the ResetB pin Low for a minimum of 500 uS, then drive it high and hold it at the Vcc
voltage level. Wait 1 mS for the crystal oscillator to stabilize.
3. Initialize the Configuration Registers by sending a Clear Command, followed by Write
Register Commands. An ACK response must be received after each command.
4.
Clear
(Clear all register contents)
Write PLL Register $0D to $20
(Disable CLKO Output)
Write TXC Register $0E to $08.
(High RF Power, 11% Modulation Index)
Write RXC Register $0F to $16
(Nominal Receiver Gain and Sensitivity)
Write CPR Register $03 to $20
(Set CPR1 for Timeout Wait Time of 1.2 milliseconds)
Write CPR Register $05 to $30
(Set CPR2 for Timeout Wait Time of 2.4 milliseconds)
5. Send the RF ON Command. Read SREG using the Read Register Command to verify that
the RF Field is on.
6. Perform the RF Transaction. A typical RF Transaction begins with Poll Single Commands,
followed by a series of TX Data Commands to select (attrib), set zone, write, and read the
CryptoRF PICC.
7. Send the RF OFF Command. Read SREG using the Read Register Command to verify that
the RF Field is off.
8. The Reader is ready to be powered off or placed in standby mode using the Sleep
Command.