RFM95 Datasheet, PDF (107/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
Name
(Address)
Bits
Variable Name
7-4 SpreadingFactor
RegModemConfig
2
(0x1E)
3
TxContinuousMode
2
RxPayloadCrcOn
1-0 SymbTimeout(9:8)
RegSymbTimeoutL
sb
7-0
(0x1F)
SymbTimeout(7:0)
Mode Reset
LoRa^TM Description
SF rate (expressed as a base-2 logarithm)
6 Æ 64 chips / symbol
7 Æ 128 chips / symbol
8 Æ 256 chips / symbol
rw 0x07 ^{9 Æ 512 chips / symbol}
10 Æ 1024 chips / symbol
11 Æ 2048 chips / symbol
12 Æ 4096 chips / symbol
other values reserved.
rw 0
0 Æ normal mode, a single packet is sent
1 Æ continuous mode, send multiple packets across the FIFO
(used for spectral analysis)
CRC Information extracted from the received packet header
rw 0x00 0 Æ Header indicates CRC off
1 Æ Header indicates CRC on
rw 0x00 RX Time-Out MSB
RX Time-Out LSB
rw 0x64 ^{RX operation time-out value expressed as number of symbols:}
TimeOut = SymbTimeout · Ts
RegPreambleMsb
(0x20)
7-0
PreambleLength(15:8)
rw
RegPreambleLsb
(0x21)
7-0
PreambleLength(7:0)
rw
RegPayloadLength
(0x22)
7-0
PayloadLength(7:0)
rw
RegMaxPayloadLe
ngth
7-0
(0x23)
RegHopPeriod
(0x24)
7-0
RegFifoRxByteAdd
r
7-0
(0x25)
RegModemConfig 7-4
3
(0x26)
3
PayloadMaxLength(7:0) _rw
FreqHoppingPeriod(7:0) _rw
FifoRxByteAddrPtr
r
Unused
r
MobileNode
rw
2
AgcAutoOn
rw
1-0 Reserved
rw
(0x27) - (0x3F)
-
Reserved
r
0x0
Preamble length MSB, = PreambleLength + 4.25 Symbols
See Section XX for more details.
0x8 Preamble Length LSB
Payload length in bytes. The register needs to be set in implicit
0x1 header mode for the expected packet length. A 0 value is not
permitted
Maximum payload length; if header payload length exceeds
0xff value a header CRC error is generated. Allows filtering of packet
with a bad size.
0x0
Symbol periods between frequency hops. (0 = disabled). 1st hop
always happen after the 1st header symbol
n/a
Current value of RX databuffer pointer (address of last byte
written by Lora receiver)
0x00
0x00 0 Æ Use for static node
1 Æ Use for mobile node
0x00 0 Æ LNA gain set by register LnaGain
1 Æ LNA gain set by the internal AGC loop
0x00 Reserved
n/a Reserved
Page 107
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