Datasheet

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SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
Service registers
RegImageCal
(0x3B)
7 AutoImageCalOn rw
0x00
*
Controls the Image calibration mechanism
0
 Calibration of the receiver depending on the temperature is
disabled
1
 Calibration of the receiver depending on the temperature
enabled.
6 ImageCalStart wt - Triggers the IQ and RSSI calibration when set in Standby mode.
5 ImageCalRunning r 0x00
Set to 1 while the Image and RSSI calibration are running.
Toggles back to 0 when the process is completed
4 unused r - unused
3 TempChange r 0x00
IRQ flag witnessing a temperature change exceeding
TempThreshold since the last Image and RSSI calibration:
0
 Temperature change lower than TempThreshold
1
 Temperature change greater than TempThreshold
2-1 TempThreshold rw 0x01
Temperature change threshold to trigger a new I/Q calibration
00
 5 °C
01
 10 °C
10
 15 °C
11
 20 °C
0 TempMonitorOff rw 0x00
Controls the temperature monitor operation:
0
 Temperature monitoring done in all modes except Sleep and
Standby
1
 Temperature monitoring stopped.
RegTemp
(0x3C)
7-0 Te mp Va lu e r -
Measured temperature
-1°C per Lsb
Needs calibration for absolute accuracy
RegLowBat
(0x3D)
7-4 unused r - unused
3 LowBatOn rw 0x00
Low Battery detector enable signal
0  LowBat detector disabled
1  LowBat detector enabled
2-0 LowBatTrim rw 0x02
Trimming of the LowBat threshold:
000  1.695 V
001  1.764 V
010  1.835 V (d)
011  1.905 V
100  1.976 V
101  2.045 V
110  2.116 V
111  2.185 V
Status registers
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description