RFM92 Datasheet, PDF (3/126 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

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Table of contents
Section
RFM92W/93W V3.0
DATASHEET
Page
4.2.1. Bit Rate Setting ......................................................................................................................................... 43
4.2.2. FSK/OOK Transmission ............................................................................................................................ 44
4.2.2.1. FSK Modulation................................................................................................................................. 44
4.2.2.2. OOK Modulation................................................................................................................................ 44
4.2.2.3. Modulation Shaping .......................................................................................................................... 44
4.2.3. FSK/OOK Reception ................................................................................................................................. 45
4.2.3.1. FSK Demodulator.............................................................................................................................. 45
4.2.3.2. OOK Demodulator............................................................................................................................. 45
4.2.3.3. Bit Synchronizer ................................................................................................................................ 47
4.2.3.4. Frequency Error Indicator ..............................................................................................................48
4.2.3.5. AFC ................................................................................................................................................... 48
4.2.3.6. Preamble Detector .........................................................................................................................49
4.2.3.7. Image Rejection Mixer ...................................................................................................................... 49
4.2.3.8. Image and RSSI Calibration.............................................................................................................. 49
4.2.3.9. Timeout Function .............................................................................................................................. 50
4.2.4. Operating Modes in FSK/OOK Mode ........................................................................................................ 50
4.2.5. General Overview...................................................................................................................................... 50
4.2.6. Startup Times .........................................................................................................................................51
4.2.6.1. Transmitter Startup Time .................................................................................................................. 51
4.2.6.2. Receiver Startup Time ...................................................................................................................... 51
4.2.6.3. Time to RSSI Evaluation ................................................................................................................... 52
4.2.6.4. Tx to Rx Turnaround Time ................................................................................................................ 53
4.2.6.5. Rx to Tx ............................................................................................................................................. 53
4.2.6.6. Receiver Hopping, Rx to Rx ............................................................................................................54
4.2.6.7. Tx to Tx ............................................................................................................................................. 54
4.2.7. Receiver Startup Options .......................................................................................................................... 54
4.2.8. Receiver Restart Methods......................................................................................................................... 55
4.2.8.1. Restart Upon User Request .............................................................................................................. 55
4.2.8.2. Automatic Restart after valid Packet Reception ................................................................................ 55
4.2.8.3. Automatic Restart when Packet Collision is Detected ....................................................................56
4.2.9. Top Level Sequencer ................................................................................................................................ 56
4.2.9.1. Sequencer States.............................................................................................................................. 56
4.2.9.2. Sequencer Transitions ...................................................................................................................... 57
4.2.9.3. Timers ............................................................................................................................................... 58
4.2.9.4. Sequencer State Machine ...............................................................................................................60
4.2.10. Data Processing in FSK/OOK Mode ....................................................................................................... 61
4.2.10.1. Block Diagram ................................................................................................................................. 61
4.2.10.2. Data Operation Modes .................................................................................................................... 61
4.2.11. FIFO .....................................................................................................................................................62
4.2.11.1. Sync Word Recognition................................................................................................................... 63
4.2.12. Digital IO Pins Mapping ........................................................................................................................65
4.2.13. Continuous Mode .................................................................................................................................66
4.2.13.1. General Description ........................................................................................................................ 66
4.2.13.2. Tx Processing ................................................................................................................................. 66
4.2.13.3. Rx Processing ................................................................................................................................. 67
4.2.14. Packet Mode ........................................................................................................................................... 67
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