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SX1235 Datasheet(PDF) 4 Page - Semtech Corporation |
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SX1235 Datasheet(HTML) 4 Page - Semtech Corporation |
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4 / 104 page  www.semtech.com Page 4 Section Page Table of contents SX1235 WIRELESS & SENSING DATASHEET Rev 1 - December 2012 5.2.1. SPI Interface.............................................................................................................................................. 53 5.2.2. FIFO .......................................................................................................................................................... 54 5.2.3. Sync Word Recognition............................................................................................................................. 55 5.2.4. Packet Handler.......................................................................................................................................... 56 5.2.5. Control....................................................................................................................................................... 56 5.3. Digital IO Pins Mapping .................................................................................................................................57 5.4. Continuous Mode ...........................................................................................................................................58 5.4.1. General Description................................................................................................................................... 58 5.4.2. Tx Processing............................................................................................................................................ 58 5.4.3. Rx Processing ........................................................................................................................................... 59 5.5. Packet Mode .................................................................................................................................................. 59 5.5.1. General Description................................................................................................................................... 59 5.5.2. Packet Format ........................................................................................................................................... 60 5.5.3. Tx Processing............................................................................................................................................ 63 5.5.4. Rx Processing ........................................................................................................................................... 63 5.5.5. Handling Large Packets ............................................................................................................................ 64 5.5.6. Packet Filtering.......................................................................................................................................... 64 5.5.7. DC-Free Data Mechanisms .......................................................................................................................66 5.5.8. Beacon Tx Mode ....................................................................................................................................... 67 5.6. io-homecontrol® Compatibility Mode ............................................................................................................. 67 6. Description of the Registers................................................................................................................................... 68 6.1. Register Table Summary ............................................................................................................................... 68 6.2. Register Map ..................................................................................................................................................71 7. Application Information .......................................................................................................................................... 85 7.1. Crystal Resonator Specification..................................................................................................................... 85 7.2. Reset of the Chip ........................................................................................................................................... 85 7.2.1. POR........................................................................................................................................................... 85 7.2.2. Manual Reset ............................................................................................................................................86 7.3. Reference Designs ........................................................................................................................................ 86 7.4. Top Sequencer: Listen Mode Examples ........................................................................................................89 7.4.1. Wake on Preamble Interrupt ..................................................................................................................... 89 7.4.2. Wake on SyncAddress Interrupt................................................................................................................ 91 7.5. Top Sequencer: Beacon Mode ......................................................................................................................94 7.5.1. Timing diagram.......................................................................................................................................... 94 7.5.2. Sequencer Configuration........................................................................................................................... 94 7.6. Example CRC Calculation .............................................................................................................................96 7.7. Example Temperature Reading .....................................................................................................................97 7.8. ETSI Category 1 Quick Start.......................................................................................................................... 98 7.8.1. PLL Settings .............................................................................................................................................. 98 |
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