RFM66W Datasheet, PDF (70/87 Pages) List of Unclassifed Manufacturers – 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

WIRELESS & SENSING
RFM66W
DATASHEET
Name
(Address)
RegRxBw
(0x12)
RegAfcBw
(0x13)
RegOokPeak
(0x14)
RegOokFix
(0x15)
RegOokAvg
(0x16)
Bits
Variable Name
7
unused
6-5
reserved
4-3
RxBwMant
2-0
RxBwExp
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
Mode
Default
value
Description
r
- unused
rw 0x00 reserved
rw 0x02 Channel filter bandwidth control:
00 → RxBwMant = 16
10 → RxBwMant = 24
01 → RxBwMant = 20
11 → reserved
rw 0x05 Channel filter bandwidth control:
FSK Mode:
RxBw
=
------------------------^F----^X----^O----^S----^C-------------------------
RxBwMant × 2^{RxBwExp + 2}
rw 0x00 reserved
rw 0x01 RxBwMant parameter used during the AFC
rw 0x03 RxBwExp parameter used during the AFC
rw 0x00 reserved
rw 0x01 Enables the Bit Synchronizer.
0 → Bit Sync disabled (not possible in Packet mode)
1 → Bit Sync enabled
rw 0x01 Selects the type of threshold in the OOK data slicer:
00 → fixed threshold
10 → average mode
01 → peak mode (default) 11 → reserved
rw 0x00 Size of each decrement of the RSSI threshold in the OOK
demodulator:
000 → 0.5 dB
001 → 1.0 dB
010 → 1.5 dB
011 → 2.0 dB
100 → 3.0 dB
101 → 4.0 dB
110 → 5.0 dB
111 → 6.0 dB
rw 0x0C Fixed threshold for the Data Slicer in OOK mode
Floor threshold for the Data Slicer in OOK when Peak mode is
used
rw 0x00 _{Period of decrement of the RSSI threshold in the OOK}
demodulator:
000 → once per chip
001 → once every 2 chips
010 → once every 4 chips 011 → once every 8 chips
100 → twice in each chip 101 → 4 times in each chip
110 → 8 times in each chip 111 → 16 times in each chip
rw 0x01 reserved
rw 0x00 Static offset added to the threshold in average mode in order
to reduce glitching activity (OOK only):
00 → 0.0 dB
10 → 4.0 dB
01 → 2.0 dB
11 → 6.0 dB
rw 0x02 _{Filter coefficients in average mode of the OOK demodulator:}
00 → f_C ≈ chip rate / 32.π
10 → f_C ≈ chip rate / 4.π
01 → f_C ≈ chip rate / 8.π
11 →f_C ≈ chip rate / 2.π
Page 70
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