RF96 datasheet(102/121 Pages) HOPE

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Page 102

RF96/97/98

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WIRELESS & SENSING

PRELIMINARY

DATASHEET

6.4. LoRa

TM Mode Register Map

This section details the RF96/97/98 register mapping and the precise contents of each register in LoRaTM 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

LoRaTM Description

RegFifo

(0x00)

7-0

Fifo

0x00

LoRaTM base-band FIFO data input/output. FIFO is cleared an

not accessible when device is in SLEEP mode

Common Register Settings

RegOpMode

(0x01)

LongRangeMode

0x0

0  FSK/OOK Mode

1  LoRaTM Mode

This bit can be modified only in Sleep mode. A write operation on

other device modes is ignored.

AccessSharedReg

0x0

This bit operates when device is in Lora mode; if set it allows

access to FSK registers page located in address space

(0x0D:0x3F) while in LoRa mode

0  Access LoRa registers page 0x0D: 0x3F

1  Access FSK registers page (in mode LoRa) 0x0D: 0x3F

5-4

reserved

0x00

reserved

LowFrequencyModeOn

0x01

Access Low Frequency Mode registers

0  High Frequency Mode (access to HF test registers)

1  Low Frequency Mode (access to LF test registers)

2-0

Mode

rwt

0x01

Device modes

000  SLEEP

001  STDBY

010  Frequency synthesis TX (FSTX)

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

0x00

(0x03)

7-0

reserved

0x00

(0x04)

7-0

reserved

0x00

(0x05)

7-0

reserved

0x00

RegFrMsb

(0x06)

7-0

Frf(23:16)

0x6c

MSB of RF carrier frequency

RegFrMid

(0x07)

7-0

Frf(15:8)

0x80

MSB of RF carrier frequency

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