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RFM95 Datasheet(PDF) 41 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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 41 page
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Page 41
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
Table 63 DIO Mapping LoRa
TM
Ā 
Mode
Operating
Mode
DIOx
Mapping
DIO5
DIO4
DIO3
DIO2
DIO1
DIO0
00
ModeReady
CadDetected
CadDone
FhssChangeChannel
RxTimeout
RxDone
01
ClkOut
PllLock
ValidHeader
FhssChangeChannel
FhssChangeChannel
TxDone
10
ClkOut
PllLock
PayloadCrcError
FhssChangeChannel
CadDetected
CadDone
ALL
11
-
-
-
-
-
-
4.2. FSK/OOK Modem
4.2.1. Bit Rate Setting
The bitrate setting is referenced to the crystal oscillator and provides a precise means of setting the bit rate (or equivalently
chip) rate of the radio. In continuous transmit mode (Section 3.2.2) the data stream to be transmitted can be input directly
to the modulator via pin 9 (DIO2/DATA) in an asynchronous manner, unless Gaussian filtering is used, in which case the
DCLK signal on pin 10 (DIO1/DCLK) is used to synchronize the data stream. See section 4.2.2.3 for details on the
Gaussian filter.
In Packet mode or in Continuous mode with Gaussian filtering enabled, the Bit Rate (BR) is controlled by bits Bitrate in
RegBitrateMsb and RegBitrateLsb
BitRate = ---------------------------
F
----
X
----
O
-----
S
---
C
------------------------------
BitRate(15,0) + -----
i
--
t
--
r
--
a
----
t
--
e
---
F
----
r
--
a
----
c
-
16
Note:
BitrateFrac bits have no effect (i.e may be considered equal to 0) in OOK modulation mode.
The quantity BitrateFrac is hence designed to allow very high precision (max. 250 ppm programing resolution) for any
bitrate in the programmable range. Table 64 below shows a range of standard bitrates and the accuracy to within which
they may be reached.




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