LJelect Sub GHz FSK/OOK Transceiver Module : Data Sheet : Page 40

LJ1269HC

Rev1.0 Page 40 Web: www.ljelect.com

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.

4.4. AutoModes

Automatic modes of packet handler can be enabled by configuring the related parameters in RegAutoModes. The intermediate

mode of the Moduleis called IntermediateMode and the enter and exit conditions to/from this

intermediate mode can be configured through the parameters EnterCondition & ExitCondition.

The enter and exit conditions cannot be used independently of each other i.e. both should be enabled at the same time. The

initial and the final state is the one configured in Mode in RegOpMode. The initial & final states can be different by

configuring the modes register while the Moduleis in intermediate mode. The pictorial description of the auto modes is

shown below.

Figure 22. Auto Modes of Packet Handler