RFM95 Datasheet, PDF (88/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
Name
(Address)
Bits
RegFrfMsb
(0x06)
7-0
RegFrfMid
(0x07)
7-0
RegFrfLsb
(0x08)
7-0
7
RegPaConfig
(0x09)
6-4
3-0
7
6-5
4
RegPaRamp
(0x0A)
3-0
Variable Name
Frf(23:16)
Mode
Default
value
FSK/OOK Description
rw 0x6c MSB of the RF carrier frequency
Frf(15:8)
rw 0x80 MSB of the RF carrier frequency
Frf(7:0)
PaSelect
MaxPower
OutputPower
unused
ModulationShaping
reserved
PaRamp
LSB of RF carrier frequency
Frf = Fstep × Frf(23;0)
rw 0x00 Default value: 434.000 MHz
The RF frequency is taken into account internally only when:
- entering FSRX/FSTX modes
- re-starting the receiver
Registers for the Transmitter
Selects PA output pin
rw 0x00 0 Æ RFO pin. Maximum power of +14 dBm
1 Æ PA_BOOST pin. Maximum power of +20 dBm
rw 0x04 Select max output power: Pmax=10.8+0.6*MaxPower [dBm]
rw
0x0f
Pout=Pmax-(15-OutputPower) if PaSelect = 0 (RFO pins)
Pout=17-(15-OutputPower) if PaSelect = 1 (PA_BOOST pin)
r 0x00 unused
Data shaping:
In FSK:
00 Æ no shaping
01 Æ gaussian filter BT = 1.0
10 Æ gaussian filter BT = 0.5
rw 0x00 _{11 Æ gaussian filter BT = 0.3}
In OOK:
00 Æ no shaping
01 Æ filtering with fcutoff = bit_rate
10 Æ filtering with fcutoff = 2*bit_rate (for bit_rate < 125 kb/s)
11 Æ reserved
rw 0x00 reserved
Rise/Fall time of ramp up/down in FSK
0000 Æ 3.4 ms
0001 Æ 2 ms
0010 Æ 1 ms
0011 Æ 500 us
0100 Æ 250 us
0101 Æ 125 us
0110 Æ 100 us
rw 0x09 0111 Æ 62 us
1000 Æ 50 us
1001 Æ 40 us (d)
1010 Æ 31 us
1011 Æ 25 us
1100 Æ 20 us
1101 Æ 15 us
1110 Æ 12 us
1111 Æ 10 us
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