AT88RF1354 SPI User Guide For CryptoRF
2.13
Write Register Command [$06]
This command writes a value to the specified configuration register of the reader.
2.13.1 Command Format
PICC
Command Processing
ISTAT goes High
Host
Reader
Send three bytes
Write Register ($06)
Register Address
Data Byte
ACK/NACK
ISTAT stays Low
Response Bytes
Get one byte
2.13.2 Example
String Decode > O0003 Host sends three bytes thru microcontroller to AT88RF1354 serial port.
>
06
AT88RF1354 Write Register Instruction.
>
0F
Select Receiver Register.
>
16
Set upper nibble for low receiver gain. Set lower nibble for moderate noise immunity.
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.
2.13.3 Operation
Write a reader configuration register. A list of valid register addresses are shown in Section 4.
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