LR1110
User Manual
Rev.1.0
UM.LR1110.W.APP
March 2020
45 of 130
Semtech
•
RxPeriod
defines the maximum RX window duration, expressed in periods of the 32.768kHz RTC. The maximum Delay
value corresponds to 512 s.
•
SleepPeriod
defines the duration of the Sleep period between the RX windows. It is expressed in periods of the
32.768kHz RTC. The maximum Delay value corresponds to 512 s.
•
Mode
selects the device mode during the RX windows:
Mode=0 configures the device in RX mode during the RX windows.
This mode is available for (G)FSK and LoRa® packet types.
Mode =1 configures the device in CAD mode during the RX windows.
This mode is available only for LoRa® packet types. It will return a CMD_FAIL for (G)FSK packet types.
The
Mode
parameter is optional, and will be set to mode = 0 if not sent.
When this command is sent in Standby mode, the context (device configuration) is saved and the device enters in a loop
defined by the following steps, and depicted in
Figure 7-2: LR1110 Current Profile During RX Duty Cycle Operation
•
The device enters RX and listens for an incoming RF packet for a period of time defined by
RxPeriod
•
Upon preamble detection, the timeout is stopped and restarted with the value 2 *
RxPeriod
+
SleepPeriod
, as shown in
Figure 7-3: RX Duty Cycle Upon Preamble Detection
•
If no packet is received during the RX window, the device goes into Sleep mode with context saved for a period of time
defined by
sleepPeriod
•
At the end of the Sleep window, the device automatically restarts the process of restoring context and enters the RX
mode, and so on. At any time, the host can stop the procedure.
Figure 7-2: LR1110 Current Profile During RX Duty Cycle Operation
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