Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/USB/HOST/INTFLAG#0x0
HOST Host Interrupt Flag
Host Start Of Frame
Bus Reset
Wake Up
Downstream
Upstream Resume from the Device
Ram Access
Device Connection
Device Disconnection
https://github.com/cmsis-svd/cmsis-svd-data