I'm using STM32 F7 46 (reference manual) and I'm a bit confused about ADC and reference voltage (VREF).
If I connect 2.5V to the VREF and 3.3 to AVDD, then what is the range of ADC measurement?
Is ADC range from 0V to 2.5V?
Or is 2.5V used to calibrate ADC reference (AVDD) and then range will be from 0V to 3.3V (=calibrated AVDD)?
I know that on AVR, (1) is correct, but I'm confused about STM32.