Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32HG/EZR32HG320F32R55/CMU/USBCRCTRL#0x0
USB Clock Recovery Control
Clock Recovery Enable
Low Speed Clock Recovery Mode
https://github.com/cmsis-svd/cmsis-svd-data