Semtech SX1278 (lora modem)

Features

  • LoRa Modem

  • 168 dB maximum link budget

  • +20 dBm - 100 mW constant RF output vs. V supply

  • +14 dBm high efficiency PA

  • Programmable bit rate up to 300 kbps

  • High sensitivity: down to -148 dBm

  • Bullet-proof front end: IIP3 = -11 dBm

  • Excellent blocking immunity

  • Low RX current of 9.9 mA, 200 nA register retention

  • Fully integrated synthesizer with a resolution of 61 Hz

  • FSK, GFSK, MSK, GMSK, LoRaTMand OOK modulation

  • Built-in bit synchronizer for clock recovery

  • Preamble detection

  • 127 dB Dynamic Range RSSI

  • Automatic RF Sense and CAD with ultra-fast AFC

  • Packet engine up to 256 bytes with CRC

  • Built-in temperature sensor and low battery indicator

 

    mark:

    clear FIFO data buffer

    1. 切换到 RX mode

    2. 进入到 sleep mode (丢失buffer中存储的数据)

   

    FIFO data buffer 中数据时不会被清除的(除非上诉情况),“擦除”只能是写入新的数据到当前占用的内存(FIFO data buffer)

    FIFO data buffer 中读写数据通过SPI定义RegFifoAddrPtr (指针),所以使用前需要赋初值
    在读或写作的FIFO数据缓冲区(RegFifo)地址指针将自动增加

    FIFO data buffer 接收时即使CRC错误,buffer也不清零,如果接收时长度超过设置的上限(RegRxNbBytes) 会重新覆盖(RegFifoRxBaseAddr

    

 

 

 

 

 

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