Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9G20/ADC/OVER#0x0
Overrun Status Register
Overrun Error 0
Overrun Error 1
Overrun Error 2
Overrun Error 3
https://github.com/cmsis-svd/cmsis-svd-data