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MSPM0G3507: Question regarding ADC and pin setting

Part Number: MSPM0G3507

Tool/software:

Hello experts,

I am using MSPM0G3507 and would like to double check if my understanding of settings are correct.

(1) ADC

If we want to measure the Temperature Sensor using Internal 2.5V for VREF, is VREF+ connected to Open and VREF- connected to GND, correct?

(2) Pin setting of unused pins

We tried the following three settings for unused terminals, and confirmed that the current consumption is all the same.

Is there any recommended setting out of following 3 for the MCU?

Input + Pull-up resistor

Input + Pull-down resistor

Output Low