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Temperature sensor in Tiva TM4C123BE6PM

ISHAN SHAH1
Intellectual 370 points
Other Parts Discussed in Thread: TM4C123BE6PM

Hi all,

I read in data sheet of TM4C123BE6PM that it has an internal temperature sensor but data sheet does not mention any where what temperature does it measure. I am not asking the temperature range that it can measure. I want to know if it tells me the internal core temperature or I can sense temperature anywhere on my board using GPIO's. 

Many thanks,

Regards,

Ishan

  • 0
    Guru 117855 points

    This internal temperature measure springs from a P-N junction & some support circuitry w/in the MCU.  It provides a reasonable measure of the MCU's temperature - on/around that internal junction. 

    It is accessed via the ADC module - it does absorb one (or more) of your ADC step sequences - but requires none of the ADC's pin resources.  It is detailed w/in the ADC section of your MCU manual.

    This internal MCU sensor measure is dominated by the MCU - it is our belief/finding that it provides only minor guidance as to your board temperature or that of nearby components.   External temperature sensors - accessed usually via one of the many serial communication provisions of these MCUs - is the normal means to make these extra-MCU temperature measurements...