RFM95 Datasheet, PDF (102/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
6.4. LoRa^TM Mode Register Map
This section details the RFM95/96/97/98(W) register mapping and the precise contents of each register in LoRa^TM
mode.
It is essential to understand that the LoRa 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 LoRa 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
LoRa^TM 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 Æ FSK/OOK Mode
rw 0x0 ^{1 Æ 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 Æ Access LoRa registers page 0x0D: 0x3F
1 Æ Access FSK registers page (in mode LoRa) 0x0D: 0x3F
RegOpMode
(0x01)
5-4 reserved
r
3
LowFrequencyModeOn rw
0x00 reserved
Access Low Frequency Mode registers
0x01 0 Æ High Frequency Mode (access to HF test registers)
1 Æ Low Frequency Mode (access to LF test registers)
2-0 Mode
Device modes
000 Æ SLEEP
001 Æ STDBY
010 Æ Frequency synthesis TX (FSTX)
rwt 0x01 011 Æ Transmit (TX)
100 Æ Frequency synthesis RX (FSRX)
101 Æ Receive continuous (RXCONTINUOUS)
110 Æ receive single (RXSINGLE)
111 Æ 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
RegFrMid
(0x07)
7-0 Frf(15:8)
rw 0x80 MSB of RF carrier frequency
Page 102
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