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SX1231 Datasheet(PDF) 3 Page - Semtech Corporation |
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SX1231 Datasheet(HTML) 3 Page - Semtech Corporation |
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3 / 78 page  www.semtech.com Page 3 SX1231 ADVANCED COMMUNICATIONS & SENSING DATASHEET Rev 2 - Nov 2009 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....................................................................................................................... 30 3.5.14. Automatic Frequency Correction ............................................................................................................ 31 3.5.15. Temperature Sensor .............................................................................................................................. 31 3.5.16. 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 4.4. 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 5.5.2. Packet Format .......................................................................................................................................... 49 5.5.3. Tx Processing (without AES).................................................................................................................... 51 5.5.4. Rx Processing (without AES) ................................................................................................................... 52 5.5.5. AES .......................................................................................................................................................... 52 5.5.6. Packet Filtering......................................................................................................................................... 54 |
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