SX1231H Ver la hoja de datos (PDF) - Semtech Corporation

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SX1231H

Low Power Integrated UHF Transceiver with On-Chip +20dBm PA

Semtech Corporation 

SX1231H

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

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

Rev 1 - Oct 2011

Page 3

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