Semtech LR1121 - Readbuffer8; Clearrxbuffer; Getrandomnumber; Table 3-12: Readbuffer8 Command

LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
33 of 130
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3.7.5 ReadBuffer8
Command ReadBuffer8(...) reads a block of Len bytes in the radio RX buffer starting at a specific Offset. RX buffer must
be implemented as a ring buffer.
3.7.6 ClearRxBuffer
Command ClearRxBuffer(...) clears all data in the radio RX buffer. It writes ‘0’ over the whole Rx buffer. It is mainly
used for debug purposes to ensure the data in the RX buffer is not from the previous packet.
3.7.7 GetRandomNumber
This command gets a 32-bit random number. This is not used for security purposes.
Table 3-12: ReadBuffer8 Command
Byte 0 1 2 3
Data from Host 0x01 0x0A Offset (7:0) Len (7:0)
Data to Host Stat1 Stat2 IrqStatus (31:24) IrqStatus (23:16)
Table 3-13: ReadBuffer8 Response
Byte 0 1 2 3 ... N
Data from Host 0x00 0x00 0x00 0x00 ... 0x00
Data to Host Stat1 Data1 Data2 Data3 ... DataN
Table 3-14: ClearRxBuffer Command
Byte 0 1
Data from Host 0x01 0x0B
Data to Host Stat1 Stat2
Table 3-15: GetRandomNumber Command
Byte 0 1
Data from Host 0x01 0x20
Data to Host Stat1 Stat2
Table 3-16: GetRandomNumber Response
Byte 0 1 2 3 4
Data from Host 0x00 0x00 0x00 0x00 0x00
Data to Host Stat1 RandomNo(31:24) RandomNo(23:16) RandomNo(15:8) RandomNo(7:0)