Data Sheet

Page 3
RFM69HCW
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3.4.8. Complex Filter -
OOK ...............................................................................................................................
27
3.4.9. RSSI ......................................................................................................................................................... 27
3.4.10. Cordic ..................................................................................................................................................... 28
3.4.11. FSK Demodulator ....................................................................................................................................29
3.4.12. OOK Demodulator .................................................................................................................................. 29
3.4.13. Bit Synchronizer ..................................................................................................................................... 31
3.4.14. Frequency Error Indicator....................................................................................................................... 31
3.4.15. Automatic Frequency Correction ............................................................................................................ 32
3.4.16. Optimized Setup for Low Modulation Index Systems ............................................................................. 33
3.4.17. Temperature Sensor ............................................................................................................................... 34
3.4.18. Timeout Function.................................................................................................................................... 34
4. Operating Modes .................................................................................................................................................... 35
4.1. Basic Modes.................................................................................................................................................. 35
4.2. Automatic Sequencer and Wake-Up Times .................................................................................................. 35
4.2.1. Transmitter Startup Time ..........................................................................................................................36
4.2.2. Tx Start Procedure ................................................................................................................................... 36
4.2.3. Receiver Startup Time.............................................................................................................................. 36
4.2.4. Rx Start
Procedure ................................................................................................................................... 38
4.2.5. Optimized Frequency Hopping
Sequences .............................................................................................. 38
4.3. Listen
Mode..................................................................................................................................................... 39
4.3.1. Timings ..................................................................................................................................................... 39
4.3.2.
Criteria ...................................................................................................................................................... 40
4.3.3.
End of Cycle Actions ................................................................................................................................ 40
4.3.4.
Stopping Listen Mode............................................................................................................................... 41
4.3.5.
RC Timer Accuracy .................................................................................................................................. 41
4.4.
AutoModes ...................................................................................................................................................... 42
5. Data
Processing...................................................................................................................................................... 43
5.1.
Overview ......................................................................................................................................................... 43
5.1.1. Block
Diagram .......................................................................................................................................... 43
5.1.2. Data Operation Modes ............................................................................................................................. 43
5.2. Control Block
Description .............................................................................................................................. 44
5.2.1. SPI
Interface............................................................................................................................................... 44
5.2.2. FIFO
........................................................................................................................................................... 45
5.2.3. Sync Word
Recognition ............................................................................................................................ 46
5.2.4. Packet
Handler ......................................................................................................................................... 47
5.2.5.
Control ........................................................................................................................................................ 47
5.3. Digital IO Pins Mapping................................................................................................................................. 47
5.3.1. DIO Pins Mapping in Continuous Mode ................................................................................................... 48
5.3.2. DIO Pins Mapping in Packet Mode .......................................................................................................... 48
5.4. Continuous Mode
........................................................................................................................................... 49
5.4.1. General
Description................................................................................................................................... 49
5.4.2. Tx
Processing............................................................................................................................................ 49