Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Maxim-Integrated/max32662/MCR/ADCCFG0#0x0
ADC Config Register 0.
Enable input driver for LP External Clock.
External Reference Select.
Internal Reference Select Option, when not using External Reference.
https://github.com/analogdevicesinc/msdk