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RFM98 датащи(PDF) 33 Page - HOPE Microelectronics CO., Ltd. |
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RFM98 датащи(HTML) 33 Page - HOPE Microelectronics CO., Ltd. |
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33 / 121 page ![]() Page 33 RFM95/96/97/98(W) Tel: + 86-755-82973805 Fax: + 86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com WIRELESS & SENSING PRELIMINARY DATASHEET 4.1.5. LoRa TM Modem State Machine Sequences The sequence for transmission and reception of data to and from the LoRaTM modem, together with flow charts of typical sequences of operation, are detailed below. Data Transmission Sequence In transmit mode power consumption is optimized by enabling RF, PLL and PA blocks only when packet data needs to be transmitted. Figure 8 shows a typical LoRaTM transmit sequence. Figure 8. LoRa TM modulation transmission sequence. Static configuration registers can only be accessed in Sleep mode, Stand-by mode or FSTX mode. The LoRaTM FIFO can only be filled in Stand-by mode. Data transmission is initiated by sending TX mode request. Upon completion the TxDone interrupt is issued and the radio returns to Stand-by mode. Following transmission the radio can be manually placed in Sleep mode or the FIFO refilled for a subsequent Tx operation. |
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