create_clock -period 20.000 -name sys_clk [get_ports sys_clk]  
set_property IOSTANDARD LVCMOS33 [get_ports A]
set_property IOSTANDARD LVCMOS33 [get_ports sys_rst]
set_property IOSTANDARD LVCMOS33 [get_ports sys_clk]
set_property IOSTANDARD LVCMOS33 [get_ports S4]
set_property IOSTANDARD LVCMOS33 [get_ports S3]
set_property IOSTANDARD LVCMOS33 [get_ports S1]
set_property IOSTANDARD LVCMOS33 [get_ports G]
set_property IOSTANDARD LVCMOS33 [get_ports E]
set_property IOSTANDARD LVCMOS33 [get_ports DP]
set_property IOSTANDARD LVCMOS33 [get_ports F]
set_property IOSTANDARD LVCMOS33 [get_ports D]
set_property IOSTANDARD LVCMOS33 [get_ports C]
set_property IOSTANDARD LVCMOS33 [get_ports B]
set_property IOSTANDARD LVCMOS33 [get_ports S2]
set_property PACKAGE_PIN U18 [get_ports sys_clk]
set_property PACKAGE_PIN J15 [get_ports sys_rst]
set_property PACKAGE_PIN J16 [get_ports A]
set_property PACKAGE_PIN F20 [get_ports B]
set_property PACKAGE_PIN L17 [get_ports C]
set_property PACKAGE_PIN L15 [get_ports D]
set_property PACKAGE_PIN L16 [get_ports DP]
set_property PACKAGE_PIN L14 [get_ports E]
set_property PACKAGE_PIN C20 [get_ports F]
set_property PACKAGE_PIN M17 [get_ports G]
set_property PACKAGE_PIN K16 [get_ports S1]
set_property PACKAGE_PIN B20 [get_ports S2]
set_property PACKAGE_PIN F19 [get_ports S3]
set_property PACKAGE_PIN M18 [get_ports S4]