Datasheet

Table Of Contents

Sensor Channel Selection bit in the Voltage Reference System Control register

(SUPC.VREF.TSSEL).

SUPC

VREF.OE, VREF.TSEN,

VREF.TSSEL

TSENSP

TSENSC

...

ADC

INPUTCTRL.MUXPOS

ADC

RESULT

TP, TC

TSENSP

TSENSC

The state of the MUX input selection bit fields in the ADC Input Control register

(ADC.INPUTCTRL.MUXPOS and MUXNEG) does not affect the sensor selection.

• If the SUPC is in on-demand mode in (SUPC.VREF.ONDEMAND=1) and SUPC.VREF.TSEN=1, the

output will be automatically set to the sensor requested by the ADC, independent of

SUPC.VREF.TSSEL. SUPC.VREF.VREFOE can also be set to '1'.

Which temperature sensor is requested by the ADC is selected by writing to the Positive MUX Input

Selection bits in the Input Control register (ADC.INPUTCTRL.MUXPOS).

Using the two conversion results, TP and TC, and the temperature calibration parameters found in the

NVM Software Calibration Area, the die temperature T can be calculated:

 =

TL  VPH  TC  VPL  TH  TC  TL  VCH  TP + TH  VCL  TP

VCL  TP  VCH  TP  VPL  TC + VPH  TC

Here, TL and TH are decimal numbers composed of their respective integer part (TLI, THI) and decimal

parts (TLD and THD) from the NVM Software Calibration Area.

Note: The accuracy is dependent on the current temperature, and degrades towards extreme

conditions.