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RFM95 Datasheet(PDF) 33 Page - HOPE Microelectronics CO., Ltd.

Part No. RFM95
Description  Low Power Long Range Transceiver Module
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Maker  HOPE [HOPE Microelectronics CO., Ltd.]
Homepage  https://www.hoperf.com/
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 33 page
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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
Ā  Modem State Machine Sequences
The sequence for transmission and reception of data to and from the LoRaTMĀ  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 LoRaTMĀ transmit sequence.
Figure 8. LoRa
TM
Ā 
modulation transmission sequence.
Static configuration registers can only be accessed in Sleep mode, Stand-by mode or FSTX mode.
The LoRaTMĀ 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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