Datasheet

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SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
RegRssiConfig
(0x0E)
7-3 RssiOffset rw 0x00
Signed RSSI offset, to compensate for the possible losses/gains
in the front-end (LNA, SAW filter...)
1dB / LSB, 2’s complement format
2-0 RssiSmoothing rw 0x02
Defines the number of samples taken to average the RSSI result:
000
 2 samples used
001
 4 samples used
010
 8 samples used
011
 16 samples used
100
 32 samples used
101
 64 samples used
110
 128 samples used
111
 256 samples used
RegRssiCollision
(0x0F)
7-0 RssiCollisionThreshold rw 0x0A
Sets the threshold used to consider that an interferer is detected,
witnessing a packet collision. 1dB/LSB (only RSSI increase)
Default: 10dB
RegRssiThresh
(0x10)
7-0 RssiThreshold rw 0xFF
RSSI trigger level for the Rssi interrupt:
- RssiThreshold / 2 [dBm]
RegRssiValue
(0x11)
7-0 RssiValue r -
Absolute value of the RSSI in dBm, 0.5dB steps.
RSSI = - RssiValue/2 [dBm]
RegRxBw
(0x12)
7 unused r - unused
6-5 reserved rw 0x00 reserved
4-3 RxBwMant rw 0x02
Channel filter bandwidth control:
00  RxBwMant = 16 10  RxBwMant = 24
01  RxBwMant = 20 11  reserved
2-0 RxBwExp rw 0x05
Channel filter bandwidth control:
FSK Mode:
RegAfcBw
(0x13)
7-5 reserved rw 0x00 reserved
4-3 RxBwMantAfc rw 0x01 RxBwMant parameter used during the AFC
2-0 RxBwExpAfc rw 0x03 RxBwExp parameter used during the AFC
RegOokPeak
(0x14)
7-6 reserved rw 0x00 reserved
5 BitSyncOn rw 0x01
Enables the Bit Synchronizer.
0  Bit Sync disabled (not possible in Packet mode)
1
 Bit Sync enabled
4-3 OokThreshType rw 0x01
Selects the type of threshold in the OOK data slicer:
00  fixed threshold 10  average mode
01
 peak mode (default) 11  reserved
2-0 OokPeakTheshStep 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
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
RxBw
FXOSC
RxBwMant
2
RxBwExp 2+
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