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SX1231IMLTRT Datasheet(PDF) 5 Page - Semtech Corporation |
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SX1231IMLTRT Datasheet(HTML) 5 Page - Semtech Corporation |
5 / 81 page www.semtech.com Page 5 SX1231 ADVANCED COMMUNICATIONS & SENSING DATASHEET Rev 3 - April 2010 Index of Figures Page Figure 1. Block Diagram ................................................................................................................................................ 8 Figure 2. Pin Diagram .................................................................................................................................................... 9 Figure 3. Marking Diagram ............................................................................................................................................ 9 Figure 4. TCXO Connection ........................................................................................................................................ 16 Figure 5. Transmitter Block Diagram ........................................................................................................................... 19 Figure 6. Receiver Block Diagram ............................................................................................................................... 22 Figure 7. AGC Thresholds Settings ............................................................................................................................. 23 Figure 8. Cordic Extraction .......................................................................................................................................... 26 Figure 9. OOK Peak Demodulator Description ............................................................................................................ 27 Figure 10. Floor Threshold Optimization ..................................................................................................................... 28 Figure 11. Bit Synchronizer Description ...................................................................................................................... 29 Figure 12. FEI Process ................................................................................................................................................ 30 Figure 13. Optimized AFC (AfcLowBetaOn=1) ............................................................................................................ 31 Figure 14. Temperature Sensor Response ................................................................................................................. 32 Figure 15. Tx Startup, FSK and OOK .......................................................................................................................... 34 Figure 16. Rx Startup - No AGC, no AFC .................................................................................................................... 35 Figure 17. Rx Startup - AGC, no AFC ......................................................................................................................... 35 Figure 18. Rx Startup - AGC and AFC ........................................................................................................................ 35 Figure 19. Listen Mode Sequence (no wanted signal is received) .............................................................................. 37 Figure 20. Listen Mode Sequence (wanted signal is received) ................................................................................... 39 Figure 21. Auto Modes of Packet Handler ................................................................................................................... 40 Figure 22. SX1231 Data Processing Conceptual View ............................................................................................... 41 Figure 23. SPI Timing Diagram (single access) .......................................................................................................... 42 Figure 24. FIFO and Shift Register (SR) ..................................................................................................................... 43 Figure 25. FifoLevel IRQ Source Behavior .................................................................................................................. 44 Figure 26. Sync Word Recognition .............................................................................................................................. 45 Figure 27. Continuous Mode Conceptual View ........................................................................................................... 47 Figure 28. Tx Processing in Continuous Mode ............................................................................................................ 47 Figure 29. Rx Processing in Continuous Mode ........................................................................................................... 48 Figure 30. Packet Mode Conceptual View ................................................................................................................... 49 Figure 31. Fixed Length Packet Format ...................................................................................................................... 50 Figure 32. Variable Length Packet Format .................................................................................................................. 50 Figure 33. Unlimited Length Packet Format ................................................................................................................ 51 Figure 34. CRC Implementation .................................................................................................................................. 56 Figure 35. Manchester Encoding/Decoding ................................................................................................................. 56 Figure 36. Data Whitening ........................................................................................................................................... 57 Figure 37. POR Timing Diagram ................................................................................................................................. 73 Figure 38. Manual Reset Timing Diagram ................................................................................................................... 74 Figure 39. +13dBm Schematic .................................................................................................................................... 74 Figure 40. +17dBm Schematic .................................................................................................................................... 75 Figure 41. Package Outline Drawing ........................................................................................................................... 76 |
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