Data Sheet

Page 97
RFM95/96/97/98(W)
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WIRELESS & SENSING PRELIMINARY DATASHEET
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
Service registers
7 AutoImageCalOn rw
0x00
*
Controls the Image calibration mechanism
0 Æ Calibration of the receiver depending on the temperature is
disabled
1 Æ 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 Æ Temperature change lower than TempThreshold
1 Æ Temperature change greater than TempThreshold
2-1 TempThreshold rw 0x01
Temperature change threshold to trigger a new I/Q calibration
00 Æ 5 °C
01 Æ 10 °C
10 Æ 15 °C
11 Æ 20 °C
RegImageCal
(0x3b)
0 TempMonitorOff rw 0x00
Controls the temperature monitor operation:
0 Æ Temperature monitoring done in all modes except Sleep and
Standby
1 Æ Temperature monitoring stopped.
RegTemp
(0x3c)
7-0 Tem p Val u e r -
Measured temperature
-1°C per Lsb
Needs calibration for absolute accuracy
7-4 unused r - unused
3 LowBatOn rw 0x00
Low Battery detector enable signal
0 Æ LowBat detector disabled
1 Æ LowBat detector enabled
RegLowBat
(0x3d)
2-0 LowBatTrim rw 0x02
Trimming of the LowBat threshold:
000 Æ 1.695 V
001 Æ 1.764 V
010 Æ 1.835 V (d)
011 Æ 1.905 V
100 Æ 1.976 V
101 Æ 2.045 V
110 Æ 2.116 V
111 Æ 2.185 V
Status registers