RFM66W Datasheet, PDF (37/87 Pages) List of Unclassifed Manufacturers – 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

WIRELESS & SENSING
RFM66W
DATASHEET
3.6. Temperature Measurement
A stand alone temperature measurement block is used in order to measure the temperature in any mode except Sleep and
Standby. It is enabled by default, and can be stopped by setting TempMonitorOff to 1. The result of the measurement is
stored in TempValue in RegTemp.
Due to process variations, the absolute accuracy of the result is +/- 10 °C. A more precise result needs initial calibration to
be done externally.
Figure 14. Temperature Sensor Response
An example code for the conversion to be applied to TempValue to obtain the reading in °C is shown in Section 7.
3.7. Timeout Function
The RFM66W includes a Timeout function, which allows it to automatically shut-down the receiver after a receive
sequence and therefore save energy.
 Timeout interrupt is generated TimeoutRxRssi x 16 x Tbit after switching to Rx mode if the Rssi flag does not
raise within this time frame (RssiValue > RssiThreshold)
 Timeout interrupt is generated TimeoutRxPreamble x 16 x Tbit after switching to Rx mode if the PreambleDetect
flag does not raise within this time frame
 Timeout interrupt is generated TimeoutSignalSync x 16 x Tbit after switching to Rx mode if the SyncAddress flag
does not raise within this time frame
This timeout interrupt can be used to warn the companion processor to shut down the receiver and return to a lower power
mode.
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