RFM69HCW Datasheet, PDF (41/79 Pages) List of Unclassifed Manufacturers – ISM TRANSCEIVER MODULE

ADVANCED COMMUNICATIONS & SENSING
Upon detection of a valid packet, the sequencing is altered, as shown below:
PayloadReady
ListenCriteria
passed
ListenEnd = 00
Idle
Rx
Listen Mode
RFM69HCW
DATASHEET
ListenEnd = 01
Idle
Rx
Listen Mode
Mode
ListenEnd = 10
Idle
Rx
Listen Mode
Idle
Rx
Figure 21. Listen Mode Sequence (wanted signal is received)
4.3.4. Stopping Listen Mode
To abort Listen mode operation, the following procedure must be respected:
‹ _{Program RegOpMode with ListenOn=0, ListenAbort=1, and the desired setting for the Mode bits (Sleep, Stdby, FS, Rx}
or Tx mode) in a single SPI access
‹ Program RegOpMode with ListenOn=0, ListenAbort=0, and the desired setting for the Mode bits (Sleep, Stdby, FS, Rx
or Tx mode) in a second SPI access
4.3.5. RC Timer Accuracy
All timings of the Listen Mode rely on the accuracy of the internal low-power RC oscillator. This oscillator is automatically
calibrated at the device power-up, and it is a user-transparent process.
For applications enduring large temperature variations, and for which the power supply is never removed, RC calibration
can be performed upon user request. RcCalStart in RegOsc1 can be used to trigger this calibration, and the flag
RcCalDone will be set automatically when the calibration is over.
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