Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAML11E14A/OPAMP/RESCTRL#0x0
Resister Control
Resistor ladder To Output
Resistor 1 Enable
Resistor 1 Mux
Potentiometer Selection
Reference output voltage level select
https://github.com/cmsis-svd/cmsis-svd-data