Data Sheet

LJ1269HC
Rev1.0 Page 3 Web: www.ljelect.com
3.4.11. OOK Demodulator ..................................................................................................................................................................... 28
3.4.12. Bit Synchronizer ......................................................................................................................................................................... 30
3.4.13. Frequency Error Indicator ........................................................................................................................................................ 30
3.4.14. Automatic Frequency Correction .............................................................................................................................................. 32
3.4.15. Optimized Setup for Low Modulation Index Systems ............................................................................................................. 32
3.4.16. Temperature Sensor ................................................................................................................................................................... 33
3.4.17. Timeout Function ....................................................................................................................................................................... 33
4. Operating Modes ........................................................................................................................................................................................ 34
4.1. Basic Modes .......................................................................................................................................................................................... 34
4.2. Automatic Sequencer and Wake-Up Times ....................................................................................................................................... 34
4.2.1. Transmitter Startup Time ............................................................................................................................................................ 35
4.2.2. Tx Start Procedure ....................................................................................................................................................................... 35
4.2.3. Receiver Startup Time ................................................................................................................................................................. 35
4.2.4. Rx Start Procedure ....................................................................................................................................................................... 37
4.2.5. Optimized Frequency Hopping Sequences ................................................................................................................................. 37
4.3 Listen Mode ........................................................................................................................................................................................... 37
4.3.1. Timings .......................................................................................................................................................................................... 38
4.3.2. Criteria .......................................................................................................................................................................................... 39
4.3.3. End of Cycle Actions .................................................................................................................................................................... 39
4.3.4. Stopping Listen Mode .................................................................................................................................................................. 40
4.3.5. RC Timer Accuracy ...................................................................................................................................................................... 40
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 ................................................................................................................................................................ 45
5.2.4. Packet Handler ............................................................................................................................................................................. 46
5.2.5. Control ........................................................................................................................................................................................... 46
5.3. Digital IO Pins Mapping ..................................................................................................................................................................... 46
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 ................................................................................................................................................................................ 48
5.4.3. Rx Processing ................................................................................................................................................................................ 48
5.5.1. General Description ...................................................................................................................................................................... 49
5.5.2. Packet Format ............................................................................................................................................................................... 49
5.5.3. Tx Processing (without AES) ....................................................................................................................................................... 52
5.5.4. Rx Processing (without AES) ....................................................................................................................................................... 52
Sub GHz FSK/OOK Transceiver Module DATASHEET