SX1276 Ver la hoja de datos (PDF) - Semtech Corporation

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componentes Descripción

Fabricante

SX1276

137 MHz to 1020 MHz Low Power Long Range Transceiver

Semtech Corporation 

SX1276/77/78/79

WIRELESS, SENSING & TIMING

Table of contents

Section

DATASHEET

Page

4.2.9. Data Processing in FSK/OOK Mode ......................................................................................................... 65

4.2.10. FIFO ........................................................................................................................................................66

4.2.11. Digital IO Pins Mapping ...........................................................................................................................69

4.2.12. Continuous Mode ....................................................................................................................................70

4.2.13. Packet Mode ........................................................................................................................................... 71

4.2.14. io-homecontrol® Compatibility Mode ...................................................................................................... 79

4.3. SPI Interface ..................................................................................................................................................80

5. SX1276/77/78/79 Analog & RF Frontend Electronics............................................................................................ 81

5.1. Power Supply Strategy .................................................................................................................................. 81

5.2. Low Battery Detector ..................................................................................................................................... 81

5.3. Frequency Synthesis ..................................................................................................................................... 81

5.3.1. Crystal Oscillator ....................................................................................................................................... 81

5.3.2. CLKOUT Output ........................................................................................................................................ 82

5.3.3. PLL ............................................................................................................................................................ 82

5.3.4. RC Oscillator ............................................................................................................................................. 82

5.4. Transmitter Description ..................................................................................................................................83

5.4.1. Architecture Description ............................................................................................................................ 83

5.4.2. RF Power Amplifiers.................................................................................................................................. 83

5.4.3. High Power +20 dBm Operation ............................................................................................................... 84

5.4.4. Over Current Protection ............................................................................................................................85

5.5. Receiver Description...................................................................................................................................... 85

5.5.1. Overview ................................................................................................................................................... 85

5.5.2. Receiver Enabled and Receiver Active States.......................................................................................... 85

5.5.3. Automatic Gain Control In FSK/OOK Mode .............................................................................................. 85

5.5.4. RSSI in FSK/OOK Mode ........................................................................................................................... 86

5.5.5. RSSI and SNR in LoRaTM Mode.............................................................................................................. 87

5.5.6. Channel Filter ............................................................................................................................................ 88

5.5.7. Temperature Measurement....................................................................................................................... 89

6. Description of the Registers................................................................................................................................... 90

6.1. Register Table Summary ............................................................................................................................... 90

6.2. FSK/OOK Mode Register Map .......................................................................................................................93

6.3. Band Specific Additional Registers .............................................................................................................. 106

6.4. LoRaTM Mode Register Map....................................................................................................................... 108

7. Application Information ........................................................................................................................................ 115

7.1. Crystal Resonator Specification................................................................................................................... 115

7.2. Reset of the Chip ......................................................................................................................................... 115

7.2.1. POR......................................................................................................................................................... 115

7.2.2. Manual Reset ..........................................................................................................................................116

7.3. Top Sequencer: Listen Mode Examples ...................................................................................................... 116

Rev. 4 - March 2015

©2015 Semtech Corporation

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www.semtech.com

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