Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Holtek/HT32F275x/USB/USB_EP3CSR#0x0
USB_EP3CSR
DTGTX
NAKTX
STLTX
DTGRX
NAKRX
STLRX
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data