Portenta 12-bit ADC Resolution using analogReadResolution

Hi,

Is it possible to use analogReadResolution(12) in one of the Portenta’s 16-bit ADC pins or will it only work with 10-bit and 16-bit? I’m not familiar with the command and I’m not sure will it work or just return an approximated number from the default 10-bit resolution. Appreciate any help.

Thanks.