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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LLCC68 датащи(PDF) 68 Page - Semtech Corporation |
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LLCC68 датащи(HTML) 68 Page - Semtech Corporation |
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68 / 106 page  LLCC68 Data Sheet Rev. 1.0 DS.LLCC68.W.APP July 2019 68 of 106 Semtech www.semtech.com Figure 13-3: RX Duty Cycle when Receiving Note: when using a TCXO controlled by the LLCC68 itself, the startup delay defined in delay(23:0) will be added between the Sleep and Rx periods 13.1.8 SetCAD The command SetCAD() can be used only in LoRa® packet type. The Channel Activity Detection is a LoRa® specific mode of operation where the device searches for the presence of a LoRa® preamble signal. After the search has completed, the device returns in STDBY_RC mode. The length of the search is configured via the command SetCadParams(...). At the end of the search period, the device triggers the IRQ CADdone if it has been enabled. If a valid signal has been detected it also generates the IRQ CadDetected. 13.1.9 SetTxContinuousWave SetTxContinuousWave() is a test command available for all packet types to generate a continuous wave (RF tone) at selected frequency and output power. The device stays in TX continuous wave until the host sends a mode configuration command. Table 13-13: SetCAD SPI Transaction Byte 0 Data from host Opcode = 0xC5 Table 13-14: SetTxContinuousWave SPI Transaction Byte 0 Data from host Opcode = 0xD1 time Radio Current Preamble Detected 2 x rxPeriod + sleepPeriod Radio in RX mode Radio in STDBY_RC 500 us Radio in SLEEP mode |
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