Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32HG/EZR32HG320F32R67/USB/DOEP0TSIZ#0x0
Device OUT Endpoint 0 Transfer Size Register
Transfer Size
Packet Count
SETUP Packet Count
https://github.com/cmsis-svd/cmsis-svd-data