Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x5_CM7/Ethernet_MAC/MACACR#0x0
Auxiliary control register
ATSFC
ATSEN0
ATSEN1
ATSEN2
ATSEN3
https://github.com/cmsis-svd/cmsis-svd-data