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
RegDioMapping1 5-4
(0x40)
3-2
1-0
7-6
5-4
RegDioMapping2 3-1
(0x41)
0
RegVersion
(0x42)
7-0
RegPllHop
7
(0x44)
6-0
7-5
RegTcxo
(0x4b)
4
3-0
7-3
RegPaDac
(0x4d)
2-0
RegFormerTemp
(0x5b)
7-0
7-4
RegBitrateFrac
(0x5d)
3-0
Variable Name
Dio0Mapping
Dio1Mapping
Dio2Mapping
Dio3Mapping
Dio4Mapping
Dio5Mapping
reserved
MapPreambleDetect
Version
FastHopOn
reserved
reserved
TcxoInputOn
reserved
reserved
PaDac
FormerTemp
unused
BitRateFrac
Mode
Default
value
FSK/OOK Description
rw 0x00
rw 0x00
Mapping of pins DIO0 to DIO5
rw 0x00
rw 0x00 See Table 18 for mapping in LoRa mode
rw 0x00 See Table 29 for mapping in Continuous mode
rw 0x00 SeeTable 30 for mapping in Packet mode
rw 0x00 reserved. Retain default value
Allows the mapping of either Rssi Or PreambleDetect to the DIO
rw
0x00
pins, as summarized on Table 29 and Table 30
0 Rssi interrupt
1 PreambleDetect interrupt
Version register
r
0x12
Version code of the chip. Bits 7-4 give the full revision number;
bits 3-0 give the metal mask revision number.
Additional registers
Bypasses the main state machine for a quick frequency hop.
rw
0x00
Writing RegFrfLsb will trigger the frequency change.
0 Frf is validated when FSTx or FSRx is requested
1 Frf is validated triggered when RegFrfLsb is written
rw 0x2d reserved
rw 0x00 reserved. Retain default value
Controls the crystal oscillator
rw 0x00 0 Crystal Oscillator with external Crystal
1 External clipped sine TCXO AC-connected to XTA pin
rw 0x09 Reserved. Retain default value.
rw 0x10 reserved. Retain default value
Enables the +20dBm option on PA_BOOST pin
rw 0x04 0x04 Default value
0x07 +20dBm on PA_BOOST when OutputPower=1111
rw
-
Temperature saved during the latest IQ (RSSI and Image)
calibration. Same format as TempValue in RegTemp.
r 0x00 unused
Fractional part of the bit rate divider (Only valid for FSK)
If BitRateFrac> 0 then:
rw 0x00
BitRate = B----i---t--R----a---t--e---(--1---5-F--,--0X---)-O--+---S---B--C------i----t----r-----a----1---t---6-e------F--------r-----a-------c--
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 105
www.semtech.com
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