
AT88RF1354 SPI User Guide For CryptoRF
2.2
Clear Command [$0E]
This command aborts a command in progress, turns off the RF field, clears the RAM buffer, and
places the reader in the idle state.
2.2.1
Command Format
PICC
Host
Reader
Send one byte
ISTAT goes High
ACK/NACK
Clear ($0E)
ISTAT stays Low
Get one byte
Command Processing
Response Bytes
2.2.2
Example
String Decode > O0001 Host sends one byte thru microcontroller to AT88RF1354 serial port.
>
0E
AT88RF1354 CLEAR command.
Wait for AT88RF1354 ISTAT pin state.
ISTAT goes High.
The AT88RF1354 buffer has data ready. Data must be read before the next command can be issued.
String Decode >
I0001 Host gets one byte from AT88RF1354 buffer.
>
01
AT88RF1354 Response: $01 (Acknowledge).
ISTAT stays Low.
The AT88RF1354 buffer is empty. The AT88RF1354 will now accept a new command.
2.2.3
Operation
The Clear command stops a command in progress, turns off the RF field, and clears the RAM
buffer. The contents of the error register are reset by the Clear command. The contents of the
other registers are unchanged.
2-3
8586A—RFID—5/09