
AT88RF1354 SPI User Guide For CryptoRF
®
2.3
Poll Continuous (REQB) Command [$02]
This command performs multiple Type B polling sequences to detect cards near the antenna.
The first response is returned to the host. In the event a card response containing a
communication error is received, then an error code is returned. If no response is detected, then
polling continues until an Abort command is sent by the host.
The optional Smart Poll mode modifies the polling operation to include error tolerance. In Smart
Poll mode polling continues until an error free card response is received.
2.3.1
Command Format
APP 0
APP 1
APP 2
Command Processing
RF Transmit Response
Command Processing
ISTAT goes High
EREG Register Byte
Response Processing
Response Bytes
PICC
Protocol 3
Protocol 2
APP 3
Protocol 1
$50
PUPI 0
PUPI 1
PUPI 2
PUPI 3
ISTAT stays Low
Get thirteen bytes
RF Transmit Command
Host
Reader
Send three bytes
Poll Continuous ($02)
AFI
PARAM
2-4
8586A—RFID—5/09