alias rmii_tx_en : std_logic is gn(10);
alias rmii_tx0 : std_logic is gp(10);
alias rmii_tx1 : std_logic is gn(9);
alias rmii_rx0 : std_logic is gn(11);
alias rmii_rx1 : std_logic is gp(11);
alias rmii_crs : std_logic is gp(12);
alias rmii_nint : std_logic is gn(12); -- clock is here 50MHz
alias rmii_mdio : std_logic is gn(13);
alias rmii_mdc : std_logic is gp(13);
constraints lpf file
FREQUENCY PORT "gn[12]" 50.00 MHZ;