Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAMV71J20/GMAC/ST2ER[2]#0x0
Screening Type 2 Ethertype Register (index = 0) 0
Ethertype Compare Value
https://github.com/cmsis-svd/cmsis-svd-data