Semtech LR1121 - Stoptimeoutonpreamble; Getrssiinst; Table 7-7: Stoptimeoutonpreamble Command; Table 7-8: Getrssiinst Command

LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
55 of 130
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7.2.7 StopTimeoutOnPreamble
Command StopTimeoutOnPreamble(...) defines if the RX timeout should be stopped on Syncword / Header detection
or on PreambleDetection.
• StopOnPreamble values:
 0x00: Stop on Syncword/Header detection (default value).
 0x01: Stop on Preamble detection.
7.2.8 GetRssiInst
Command GetRssiInst(...) returns the instantaneous RSSI value at the precise time when the command is sent.
Therefore if no RF packet is present, the RSSI value returned by command GetRssiInst(...) corresponds to the RF
noise.
The RSSI is calculated using the following formula: RSSI (dBm)= -Rssi/2.
Table 7-7: StopTimeoutOnPreamble Command
Byte 0 1 2
Data from Host 0x02 0x17 StopOnPreamble
Data to Host Stat1 Stat2 IrqStatus (31:24)
Table 7-8: GetRssiInst Command
Byte 0 1
Data from Host 0x02 0x05
Data to Host Stat1 Stat2
Table 7-9: GetRssiInst Response
Byte 0 1
Data from Host 0x00 0x00
Data to Host Stat1 Rssi