Data Sheet

LJ1269HC
Rev1.0 Page 5 Web: www.ljelect.com
Figure 14. Optimized AFC (AfcLowBetaOn=1) ........................................................................................................................................... 32
Figure 15. Temperature Sensor Response .................................................................................................................................................... 33
Figure 16. Tx Startup, FSK and OOK .......................................................................................................................................................... 35
Figure 17. Rx Startup - No AGC, no AFC .................................................................................................................................................... 36
Figure 18. Rx Startup - AGC, no AFC .......................................................................................................................................................... 36
Figure 19. Rx Startup - AGC and AFC ......................................................................................................................................................... 36
Figure 20. Listen Mode Sequence (no wanted signal is received) ............................................................................................................... 38
Figure 21. Listen Mode Sequence (wanted signal is received) .................................................................................................................... 40
Figure 22. Auto Modes of Packet Handler ................................................................................................................................................... 40
Figure 23. LJ1269HC Data Processing Conceptual View ........................................................................................................................... 41
Figure 24. SPI Timing Diagram (single access) ............................................................................................................................................ 42
Figure 25. FIFO and Shift Register (SR) ...................................................................................................................................................... 43
Figure 26. FifoLevel IRQ Source Behavior .................................................................................................................................................. 44
Figure 27. Sync Word Recognition ................................................................................................................................................................ 45
Figure 28. Continuous Mode Conceptual View ............................................................................................................................................ 47
Figure 29. Tx Processing in Continuous Mode ............................................................................................................................................ 48
Figure 30. Rx Processing in Continuous Mode ............................................................................................................................................ 48
Figure 31. Packet Mode Conceptual View .................................................................................................................................................... 49
Figure 32. Fixed Length Packet Format ....................................................................................................................................................... 50
Figure 33. Variable Length Packet Format .................................................................................................................................................. 51
Figure 34. Unlimited Length Packet Format ............................................................................................................................................... 51
Figure 35. CRC Implementation ................................................................................................................................................................... 56
Figure 36. Manchester Encoding/Decoding .................................................................................................................................................. 57
Figure 37. Data Whitening ............................................................................................................................................................................. 57
Figure 38. POR Timing Diagram .................................................................................................................................................................. 73
Figure 39. Manual Reset Timing Diagram ................................................................................................................................................... 74
Figure 40. Typical Application Schematic .................................................................................................................................................... 75
Figure 41. Package Outline Drawing ............................................................................................................................................................ 78
Index of Tables Page
Table 1 LJ1269HC Pinouts .............................................................................................................................................................................. 9
Table 2 Absolute Maximum Ratings ............................................................................................................................................................. 10
Table 3 Operating Range ............................................................................................................................................................................... 10
Table 4 Power Consumption Specification ................................................................................................................................................... 11
Table 5 Frequency Synthesizer Specification ............................................................................................................................................... 11
Table 6 Receiver Specification ....................................................................................................................................................................... 12
Table 7 Transmitter Specification ................................................................................................................................................................. 13
Table 8 Digital Specification .......................................................................................................................................................................... 14
Table 9 Bit Rate Examples ............................................................................................................................................................................. 19
Table 10 Power Amplifier Mode Selection Truth Table ............................................................................................................................... 20
Sub GHz FSK/OOK Transceiver Module DATASHEET