RFM95 Datasheet, PDF (114/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
This example configuration is achieved as follows:
Table 92 Listen Mode with SyncAddress Condition Settings
Variable
IdleMode
FromStart
LowPowerSelection
FromIdle
FromReceive
FromRxTimeout
Effect
1: Sleep mode
00: To LowPowerSelection
1: To Idle state
1: To Receive state on T1 interrupt
101: To Sequencer off on SyncAddress interrupt
10: To LowPowerSelection
T_{TimeoutRxPreamble} should be set to just long enough to catch a preamble (depends on PreambleDetectSize and BitRate).
T_Timer1 should be set to 64 µs (shortest possible duration).
T_Timer2 is set so that T_{Timer1 +} T_Timer2 defines the time between two start of reception.
In order to insure packet detection and optimize the receiver power consumption, the received packet Preamble should be
defined so that T_{Preamble =} T_Timer2 - T_SyncAddress with T_SyncAddress = (SyncSize + 1)*8/BitRate.
An example of DIO configuration for this mode is described in the following table:
Table 93 Listen Mode with PreambleDetect Condition Recommended DIO Mapping
DIO Value
Description
0
01
CrcOk
1
00
FifoLevel
2
11
SyncAddress
3
00
FifoEmpty
4
11
PreambleDetect – Note: MapPreambleDetect bit should be set.
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