ldc_set_location -site 35 [get_ports {clk}]
ldc_set_location -site 14 [get_ports {start}]

ldc_set_location -site 27 [get_ports {data[0]}]
ldc_set_location -site 25 [get_ports {data[1]}]
ldc_set_location -site 21 [get_ports {data[2]}]
ldc_set_location -site 19 [get_ports {data[3]}]
ldc_set_location -site 26 [get_ports {data[4]}]
ldc_set_location -site 23 [get_ports {data[5]}]
ldc_set_location -site 20 [get_ports {data[6]}]
ldc_set_location -site 18 [get_ports {data[7]}]