I am using S32DS SDK to test ADC on MPC5748G DEVKIT. My ADC input pins (channels) are PB4, PD4 and PD5.
My test result shows sometimes ADC calibration failed at ADC_Init().
Register ADCx_CALBISTREG reports failure at bit 28.
Failures can still happen even inputs are connected to 3.3V or GND.
May I know which cases will make ADC calibration fail?