set_device \
    -family  SmartFusion2 \
    -die     PA4M1000_N \
    -package fg484 \
    -speed   -1 \
    -tempr   {COM} \
    -voltr   {COM}
set_def NETLIST_TYPE EDIF
set_name MC_System_top
set_workdir {E:\Webrelease\Sep15\Test\Final\SK2A_test\designer\MC_System_top}
set_log           {E:\Webrelease\Sep15\Test\Final\SK2A_test\designer\MC_System_top\MC_System_top_export_sdc.log}
set_design_state pre_layout
