RFM95 Datasheet, PDF (91/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
Name
(Address)
RegAfcBw
(0x13)
RegOokPeak
(0x14)
RegOokFix
(0x15)
RegOokAvg
(0x16)
RegRes17
to
RegRes19
Bits
Variable Name
7-5
reserved
4-3
RxBwMantAfc
2-0
RxBwExpAfc
7-6
reserved
5
BitSyncOn
4-3
OokThreshType
2-0
OokPeakTheshStep
7-0
OokFixedThreshold
7-5
OokPeakThreshDec
4
reserved
3-2
OokAverageOffset
1-0 OokAverageThreshFilt
7-0
reserved
Mode
Default
value
FSK/OOK Description
rw 0x00 reserved
rw 0x01 RxBwMant parameter used during the AFC
rw 0x03 RxBwExp parameter used during the AFC
rw 0x00 reserved
Enables the Bit Synchronizer.
rw 0x01 0 Æ Bit Sync disabled (not possible in Packet mode)
1 Æ Bit Sync enabled
Selects the type of threshold in the OOK data slicer:
rw 0x01 00 Æ fixed threshold
10 Æ average mode
01 Æ peak mode (default) 11 Æ reserved
Size of each decrement of the RSSI threshold in the OOK
demodulator:
rw
0x00
000 Æ 0.5 dB
010 Æ 1.5 dB
001 Æ 1.0 dB
011 Æ 2.0 dB
100 Æ 3.0 dB
101 Æ 4.0 dB
110 Æ 5.0 dB
111 Æ 6.0 dB
Fixed threshold for the Data Slicer in OOK mode
rw 0x0C Floor threshold for the Data Slicer in OOK when Peak mode is
used
Period of decrement of the RSSI threshold in the OOK
demodulator:
rw
0x00
000 Æ once per chip
010 Æ once every 4 chips
001 Æ once every 2 chips
011 Æ once every 8 chips
100 Æ twice in each chip 101 Æ 4 times in each chip
110 Æ 8 times in each chip 111 Æ 16 times in each chip
rw 0x01 reserved
Static offset added to the threshold in average mode in order to
rw
0x00
reduce glitching activity (OOK only):
00 Æ 0.0 dB
10 Æ 4.0 dB
01 Æ 2.0 dB
11 Æ 6.0 dB
Filter coefficients in average mode of the OOK demodulator:
rw 0x02 00 Æ f_C ≈ chip rate / 32.π 01 Æ f_C ≈ chip rate / 8.π
10 Æ f_C ≈ chip rate / 4.π
11 Æf_C ≈ chip rate / 2.π
0x47
rw 0x32 reserved. Keep the Reset values.
0x3E
Page 91
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