RFM66W Datasheet, PDF (3/87 Pages) List of Unclassifed Manufacturers – 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

WIRELESS & SENSING
RFM66W
DATASHEET
3.5.8. Bit Synchronizer 34
3.5.9. Frequency Error Indicator........................................................................................................................... 34
3.5.10. AFC ........................................................................................................................................................... 35
3.5.11. Preamble Detector ..................................................................................................................................36
3.5.12. Image Rejection Mixer............................................................................................................................. 36
3.5.13. Image and RSSI Calibration .................................................................................................................... 36
3.6. Temperature Measurement........................................................................................................................... 37
3.7. Timeout Function .......................................................................................................................................... 37
4. Operating Modes .................................................................................................................................................... 38
4.1. General Overview ......................................................................................................................................... 38
4.2. Startup Times................................................................................................................................................ 38
4.2.1. Transmitter Startup Time........................................................................................................................... 39
4.2.2. Tx Start Procedure ................................................................................................................................... 39
4.2.3. Receiver Startup Time.............................................................................................................................. 39
4.3. Top Level Sequencer .................................................................................................................................... 40
4.3.1. Sequencer States ..................................................................................................................................... 40
4.3.2. Sequencer Transitions ................................................................................................................................ 41
4.3.3. Example Sequence: Listen Mode ..............................................................................................................46
5. Data Processing....................................................................................................................................................... 47
5.1. Overview .......................................................................................................................................................... 47
5.1.1. Block Diagram ........................................................................................................................................... 47
5.1.2. Data Operation Modes .............................................................................................................................. 47
5.2. Control Block Description............................................................................................................................... 48
5.2.1. SPI Interface............................................................................................................................................... 48
5.2.2. FIFO ........................................................................................................................................................... 49
5.2.3. Sync Word Recognition ............................................................................................................................. 50
5.2.4. Packet Handler .......................................................................................................................................... 51
5.2.5. Control ........................................................................................................................................................ 51
5.3. Digital IO Pins Mapping................................................................................................................................. 51
5.4. Continuous Mode ............................................................................................................................................ 53
5.4.1. General Description................................................................................................................................... 53
5.4.2. Tx Processing............................................................................................................................................ 53
5.4.3. Rx Processing .......................................................................................................................................... 54
5.5. Packet Mode .................................................................................................................................................. 54
5.5.1. General Description.................................................................................................................................. 54
5.5.2. Packet Format .......................................................................................................................................... 55
5.5.3. Tx Processing........................................................................................................................................... 58
5.5.4. Rx Processing .......................................................................................................................................... 58
5.5.5. Handling Large Packets ........................................................................................................................... 59
5.5.6. Packet Filtering......................................................................................................................................... 59
5.5.7. DC-Free Data Mechanisms ...................................................................................................................... 61
5.5.8. Beacon Tx Mode ...................................................................................................................................... 62
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