Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32HG/EZR32HG320F32R55/USB/DOEP0_DMAADDR#0x0
Device OUT Endpoint x+1 DMA Address Register
DMA Address
https://github.com/cmsis-svd/cmsis-svd-data