When the system temperature is too high , how the SOC receive and handle the over temperature event?
1.溫度感測：首先需要溫度感測的零件(Temperature sensor),例如NTC。當溫度產生變化時，NTC阻值產生變化(圖一)。We need the temperature sensor component, like the NTC. When the
temperature change ,the NTC resistance is also changed. In the figure as below, the resistance is 10Kohm in the 25degC. When the temperature is rising, the resistance would be dropped.
2.ADC轉換:：NTC會跟一個固定阻值的電阻串聯，當NTC隨著溫度改變，分壓值Vadc也跟著改變。Vadc經過ADC，轉換為數位資料 (ADC code)。在ADC的spec可以查到電壓與ADC code的轉換公式，例如ADC code=Vadc* 512.
The NTC resistor will be series with a constant resistor. The divided voltage is input of ADC, ADC convert the voltage to digital data(ADC code). You can find the formula to transfer voltage to ADC code in the ADC spec.