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SX1276 View Datasheet(PDF) - Semtech Corporation

Part Name
Description
MFG CO.
'SX1276' PDF : 132 Pages View PDF
SX1276/77/78/79
WIRELESS, SENSING & TIMING
DATASHEET
6.4. LoRaTM Mode Register Map
This details the SX1276/77/78/79 register mapping and the precise contents of each register in LoRaTM mode.
It is essential to understand that the LoRaTM modem is controlled independently of the FSK modem. Therefore, care
should be taken when accessing the registers, especially as some register may have the same name in LoRaTM or FSK
mode.
The LoRa registers are only accessible when the device is set in Lora mode (and, in the same way, the FSK register are
only accessible in FSK mode). However, in some cases, it may be necessary to access some of the FSK register while in
LoRa mode. To this aim, the AccesSharedReg bit was created in the RegOpMode register. This bit, when set to ‘1’, will
grant access to the FSK register 0x0D up to the register 0x3F. Once the setup has been done, it is strongly recommended
to clear this bit so that LoRa register can be accessed normally.
Convention: r: read, w: write, c : set to clear and t: trigger.
Name
(Address)
Bits
Variable Name
Mode Reset
LoRaTM Description
RegFifo
(0x00)
7-0 Fifo
rw 0x00 LoRaTM base-band FIFO data input/output. FIFO is cleared an
not accessible when device is in SLEEP mode
Common Register Settings
7
LongRangeMode
0 FSK/OOK Mode
rw 0x0 1 LoRaTM Mode
This bit can be modified only in Sleep mode. A write operation on
other device modes is ignored.
6
AccessSharedReg
This bit operates when device is in Lora mode; if set it allows
access to FSK registers page located in address space
rw 0x0 (0x0D:0x3F) while in LoRa mode
0 Access LoRa registers page 0x0D: 0x3F
1 Access FSK registers page (in mode LoRa) 0x0D: 0x3F
RegOpMode
(0x01)
5-4 reserved
r
0x00 reserved
Access Low Frequency Mode registers
3
LowFrequencyModeOn rw 0x01 0 High Frequency Mode (access to HF test registers)
1 Low Frequency Mode (access to LF test registers)
2-0 Mode
Device modes
000 SLEEP
001 STDBY
010 Frequency synthesis TX (FSTX)
rwt 0x01 011 Transmit (TX)
100 Frequency synthesis RX (FSRX)
101 Receive continuous (RXCONTINUOUS)
110 receive single (RXSINGLE)
111 Channel activity detection (CAD)
(0x02)
7-0 reserved
r
0x00 -
(0x03)
7-0 reserved
r
0x00 -
(0x04)
7-0 reserved
rw 0x00 -
(0x05)
7-0 reserved
r
0x00 -
RegFrMsb
(0x06)
7-0 Frf(23:16)
rw 0x6c MSB of RF carrier frequency
Rev. 4 - March 2015
©2015 Semtech Corporation
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