Datasheet

www.semtech.comPage 93
SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
6.2. FSK/OOK Mode Register Map
This section details the SX1272/73 register mapping and the precise contents of each register in FSK/OOK mode.
Convention: r: read, w: write, t:trigger, c: clear
Table 40 Register Map
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
RegFifo
(0x00)
7-0 Fifo rw 0x00 FIFO data input/output
Registers for Common settings
RegOpMode
(0x01)
7 LongRangeMode r 0x00
0
 FSK/OOK Mode
1
 LoRa
TM
Mode
This bit can be modified only in Sleep mode. A write operation on
other device modes is ignored.
6-5 ModulationType rw 0x00
Modulation scheme:
00
 FSK
01
 OOK
10 -11
 reserved
4-3 ModulationShaping rw 0x00
Data shaping:
In FSK:
00  no shaping
01
 Gaussian filter BT = 1.0
10
 Gaussian filter BT = 0.5
11
 Gaussian filter BT = 0.3
In OOK:
00
 no shaping
01
 filtering with f
cutoff
= bit_rate
10
 filtering with f
cutoff
= 2*bit_rate (for bit_rate < 125 kbps)
11
 reserved
2-0 Mode rw 0x01
Transceiver modes
000
 Sleep mode
001
 Stdby mode
010
 FS mode TX (FSTx)
011
 Transmitter mode (Tx)
100
 FS mode RX (FSRx)
101
 Receiver mode (Rx)
110
 reserved
111
 reserved
RegBitrateMsb
(0x02)
7-0 BitRate(15:8) rw 0x1A MSB of Bit Rate (chip rate if Manchester encoding is enabled)
RegBitrateLsb
(0x03)
7-0 BitRate(7:0) rw 0x0B
LSB of bit rate (chip rate if Manchester encoding is enabled)
Default value: 4.8 kbps
BitRate
FXOSC
BitRate 15 0(,)
BitrateFrac
16
-------------------------------
+
-------------------------------------------------------------------------
=