
AT88RF1354 SPI User Guide For CryptoRF
2.7
Read Register Command [$07]
This command reads the contents of the specified configuration register.
2.7.1
Command Format
ISTAT goes High
Register Data
ISTAT stays Low
Get two bytes
Response Bytes
ACK/NACK
PICC
Host
Reader
Send two bytes
Read Register ($07)
Register Address
Command Processing
2.7.2
Example
String Decode > O0002 Host sends two bytes thru microcontroller to AT88RF1354 serial port.
>
07
AT88RF1354 Read Register Instruction.
>
0F
Select Receiver Register.
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 >
I0002 Host gets two bytes from AT88RF1354 buffer.
>
01
AT88RF1354 Response: $01 (Acknowledge).
>
16
AT88RF1354 Response: Value dependent upon last data written into the Receiver Register.
ISTAT stays Low.
The AT88RF1354 buffer is empty. The AT88RF1354 will now accept a new command.
2.7.3
Operation
Read an AT88RF1354 configuration register. To read a different register, substitute the $0F data
byte shown in the example with a different, valid AT88RF1354 register address. A list of valid
register addresses are shown in Section 4.
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8586A—RFID—5/09