Can I connect the xgmii_rx_clk or xgmii_tx_clk ports to the rx_coreclkin port of the 10GBASE-R PHY IP?

Description

No, you cannot connect the xgmii_rx_clk or xgmii_tx_clk ports to the rx_coreclkin port of the 10GBASE-R PHY IP.

Resolution

If you enable the rx_coreclkin port of the 10GBASE-R PHY IP, the 156.25 MHz rx_coreclkin signal must be generated outside of the IP.