SX1231 データシートの表示（PDF） - Semtech Corporation

部品番号

コンポーネント説明

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SX1231

Low Power Integrated UHF Transceiver

Semtech Corporation 

SX1231

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

3.5.9. Cordic ....................................................................................................................................................... 26

3.5.10. FSK Demodulator .................................................................................................................................... 27

3.5.11. OOK Demodulator .................................................................................................................................. 27

3.5.12. Bit Synchronizer ..................................................................................................................................... 29

3.5.13. Frequency Error Indicator....................................................................................................................... 29

3.5.14. Automatic Frequency Correction ............................................................................................................ 30

3.5.15. Optimized Setup for Low Modulation Index Systems ............................................................................. 31

3.5.16. Temperature Sensor ............................................................................................................................... 32

3.5.17. Timeout Function.................................................................................................................................... 32

4. Operating Modes .................................................................................................................................................. 33

4.1. Basic Modes.................................................................................................................................................. 33

4.2. Automatic Sequencer and Wake-Up Times .................................................................................................. 33

4.2.1. Transmitter Startup Time........................................................................................................................... 34

4.2.2. Tx Start Procedure ................................................................................................................................... 34

4.2.3. Receiver Startup Time.............................................................................................................................. 34

4.2.4. Rx Start Procedure ................................................................................................................................... 36

4.2.5. Optimized Frequency Hopping Sequences .............................................................................................. 36

4.3. Listen mode................................................................................................................................................... 37

4.3.1. Timings ..................................................................................................................................................... 37

4.3.2. Criteria ...................................................................................................................................................... 38

4.3.3. End of Cycle Actions ................................................................................................................................ 38

4.3.4. RC Timer Accuracy .................................................................................................................................. 39

4.4. AutoModes .................................................................................................................................................... 40

5. Data Processing.................................................................................................................................................... 41

5.1. Overview ....................................................................................................................................................... 41

5.1.1. Block Diagram .......................................................................................................................................... 41

5.1.2. Data Operation Modes ............................................................................................................................. 41

5.2. Control Block Description.............................................................................................................................. 42

5.2.1. SPI Interface............................................................................................................................................. 42

5.2.2. FIFO ......................................................................................................................................................... 43

5.2.3. Sync Word Recognition ............................................................................................................................ 44

5.2.4. Packet Handler ......................................................................................................................................... 45

5.2.5. Control ...................................................................................................................................................... 45

5.3. Digital IO Pins Mapping................................................................................................................................. 45

5.3.1. DIO Pins Mapping in Continuous Mode ................................................................................................... 46

5.3.2. DIO Pins Mapping in Packet Mode .......................................................................................................... 46

5.4. Continuous Mode .......................................................................................................................................... 47

5.4.1. General Description.................................................................................................................................. 47

5.4.2. Tx Processing........................................................................................................................................... 47

5.4.3. Rx Processing .......................................................................................................................................... 48

5.5. Packet Mode ................................................................................................................................................. 48

5.5.1. General Description.................................................................................................................................. 48

Rev 3 - April 2010

Page 3

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