STM32H743 ADC single-end and differential input configuration

[lsong.1]

Hi，I use ADC1_INP2 for single-end mode , how the ADC1_INN2 connect to？Internal VREF- or outside GND？ And in differential mode，ADC1_INP6/ADC1_INN2 use de same pin, is that i can only use ADC1 channel 2 in differential mode? ADC1 channel 6 can't be used.

[TDK]

> I use ADC1_INP2 for single-end mode , how the ADC1_INN2 connect to

ADC1_INN2 is not used in single-ended mode. You can use it for something else, or leave it floating, or whatever.

> And in differential mode，ADC1_INP6/ADC1_INN2 use de same pin, is that i can only use ADC1 channel 2 in differential mode?

Correct.