SX1276 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX1276' PDF : 132 Pages View PDF
WIRELESS, SENSING & TIMING
SX1276/77/78/79
DATASHEET
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
7-6
reserved
rw 0x00 reserved
Enables the Bit Synchronizer.
5
BitSyncOn
rw 0x01 0 Bit Sync disabled (not possible in Packet mode)
1 Bit Sync enabled
RegOokPeak
4-3
(0x14)
OokThreshType
2-0
OokPeakTheshStep
Selects the type of threshold in the OOK data slicer:
rw 0x01 00 fixed threshold
10 average mode
01 peak mode (default) 11 reserved
Size of each decrement of the RSSI threshold in the OOK
demodulator:
rw
0x00
000 0.5 dB
010 1.5 dB
001 1.0 dB
011 2.0 dB
100 3.0 dB
101 4.0 dB
110 5.0 dB
111 6.0 dB
RegOokFix
(0x15)
7-0
OokFixedThreshold
Fixed threshold for the Data Slicer in OOK mode
rw 0x0C Floor threshold for the Data Slicer in OOK when Peak mode is
used
7-5
OokPeakThreshDec
Period of decrement of the RSSI threshold in the OOK
demodulator:
rw
0x00
000 once per chip
010 once every 4 chips
001 once every 2 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
RegOokAvg
4
(0x16)
3-2
reserved
OokAverageOffset
rw 0x01 reserved
Static offset added to the threshold in average mode in order to
rw
0x00
reduce glitching activity (OOK only):
00 0.0 dB
10 4.0 dB
01 2.0 dB
11 6.0 dB
1-0 OokAverageThreshFilt
Filter coefficients in average mode of the OOK demodulator:
rw 0x02 00 fC ≈ chip rate / 32.π 01 fC ≈ chip rate / 8.π
10 fC ≈ chip rate / 4.π
11 fC ≈ chip rate / 2.π
RegRes17
to
7-0
RegRes19
reserved
0x47
rw 0x32 reserved. Keep the Reset values.
0x3E
7-5
unused
r
- unused
4
AgcStart
wt 0x00 Triggers an AGC sequence when set to 1.
3
reserved
rw 0x00 reserved
2
RegAfcFei
(0x1a)
1
0
unused
AfcClear
AfcAutoClearOn
-
- unused
wc 0x00 Clear AFC register set in Rx mode. Always reads 0.
Only valid if AfcAutoOn is set
0 AFC register is not cleared at the beginning of the automatic
rw 0x00 AFC phase
1 AFC register is cleared at the beginning of the automatic
AFC phase
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 97
www.semtech.com
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