set_property PACKAGE_PIN AC12 [get_ports refclk_p] set_property IOSTANDARD DIFF_SSTL18_I_DCI[get_ports refclk_p] set_propertyIOSTANDARD DIFF_SSTL18_I_DCI [get_ports refclk_n]
set_propertyPACKAGE_PIN V4 [get_ports aresetn] set_propertyIOSTANDARD LVCMOS18 [get_ports aresetn]
set_propertyPACKAGE_PIN V4 [get_ports {data_out[0]}] set_propertyIOSTANDARD LVCMOS33 [get_ports {data_out[0]}]
也可在综合之后,打开右上角小窗口,选择I/O Planning进行约束。 |