RFM92 Datasheet, PDF (81/126 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

RFM92W/93W V3.0
The carrier frequency is programmed through RegFrf, split across addresses 0x06 to 0x08:
F_RF = F_STEP × Frf(23,0)
Note
The Frf setting is split across 3 bytes. A change in the center frequency will only be taken into account when the
least significant byte FrfLsb in RegFrfLsb is written. This allows the potential for user generation of m-ary FSK at
very low bit rates. This is possible where frequency modulation is achieved by direct programming of the
programmed RF centre frequency. To enable this functionality set the FastHopOn bit of register RegPllHop.
5.3.4. RC Oscillator
All timing operations in the low-power Sleep state of the Top Level Sequencer rely on the accuracy of the internal low-
power RC oscillator. This oscillator is automatically calibrated at the device power-up not requiring any user input.
Page 81
Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com