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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
7
6
RegRxConfig
(0x0d)
5
4
3
2-0
7-3
RegRssiConfig
(0x0e)
2-0
RegRssiCollision
(0x0f)
7-0
RegRssiThresh
(0x10)
7-0
RegRssiValue
(0x11)
7-0
7
6-5
RegRxBw
(0x12)
4-3
2-0
RegAfcBw
7-5
(0x13)
4-3
2-0
Variable Name
RestartRxOnCollision
RestartRxWithoutPllLock
RestartRxWithPllLock
AfcAutoOn
AgcAutoOn
RxTrigger
RssiOffset
RssiSmoothing
RssiCollisionThreshold
RssiThreshold
RssiValue
unused
reserved
RxBwMant
RxBwExp
reserved
RxBwMantAfc
RxBwExpAfc
Mode
Default
value
FSK/OOK Description
Turns on the mechanism restarting the receiver automatically if it
rw
0x00
gets saturated or a packet collision is detected
0 No automatic Restart
1 Automatic restart On
Triggers a manual Restart of the Receiver chain when set to 1.
wt 0x00 Use this bit when there is no frequency change,
RestartRxWithPllLock otherwise.
Triggers a manual Restart of the Receiver chain when set to 1.
wt 0x00 Use this bit when there is a frequency change, requiring some
time for the PLL to re-lock.
rw
0x00
0 No AFC performed at receiver startup
1 AFC is performed at each receiver startup
rw
0x01
0 LNA gain forced by the LnaGain Setting
1 LNA gain is controlled by the AGC
rw
0x06 Selects the event triggering AGC and/or AFC at receiver startup.
* See Table 24 for a description.
Signed RSSI offset, to compensate for the possible losses/gains
rw 0x00 in the front-end (LNA, SAW filter...)
1dB / LSB, 2’s complement format
Defines the number of samples taken to average the RSSI result:
000 2 samples used
001 4 samples used
010 8 samples used
rw 0x02 011 16 samples used
100 32 samples used
101 64 samples used
110 128 samples used
111 256 samples used
Sets the threshold used to consider that an interferer is detected,
rw 0x0a witnessing a packet collision. 1dB/LSB (only RSSI increase)
Default: 10dB
rw
0xff
RSSI trigger level for the Rssi interrupt:
- RssiThreshold / 2 [dBm]
r
-
Absolute value of the RSSI in dBm, 0.5dB steps.
RSSI = - RssiValue/2 [dBm]
r
- unused
rw 0x00 reserved
Channel filter bandwidth control:
rw 0x02 00 RxBwMant = 16
10 RxBwMant = 24
01 RxBwMant = 20
11 reserved
rw 0x05 Channel filter bandwidth control
rw 0x00 reserved
rw 0x01 RxBwMant parameter used during the AFC
rw 0x03 RxBwExp parameter used during the AFC
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 96
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