Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F413xx_v2/IOMUX/EXINTC1#0x0
External interrupt configuration register 1
Configure EXINT0 source
Configure EXINT1 source
Configure EXINT2 source
Configure EXINT3 source
https://github.com/cmsis-svd/cmsis-svd-data