Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Infineon/XMC4300/ETH0/FLOW_CONTROL#0x0
Flow Control Register
Flow Control Busy or Backpressure Activate
Transmit Flow Control Enable
Receive Flow Control Enable
Unicast Pause Frame Detect
Pause Low Threshold
Disable Zero-Quanta Pause
Pause Time
https://github.com/cmsis-svd/cmsis-svd-data