
AT88RF1354 SPI User Guide For CryptoRF
2.4
Poll Single (REQB) Command [$01]
This command performs a single Type B polling sequence to detect cards near the antenna. The
first response is returned to the host. In the event no error free response is detected, then an
error code is returned.
2.4.1
Command Format
ISTAT stays Low
Get thirteen bytes
RF Transmit Command
Host
Reader
Send three bytes
Poll Single ($01)
AFI
PARAM
PICC
Protocol 3
Protocol 2
APP 3
Protocol 1
$50
PUPI 0
PUPI 1
PUPI 2
PUPI 3
APP 0
APP 1
APP 2
Command Processing
RF Transmit Response
Command Processing
ISTAT goes High
EREG Register Byte
Response Processing
Response Bytes
2-7
8586A—RFID—5/09