clocktop.ucf

一个在Xilinx spartan3实现的时钟

#PACE: Start of Constraints generated by PACE

#PACE: Start of PACE I/O Pin Assignments
NET "b1"  LOC = "P63"  ;
NET "b2"  LOC = "P64"  ;
NET "b3"  LOC = "P65"  ;
NET "b4"  LOC = "P71"  ;
NET "clk"  LOC = "P79"  ;
NET "N<0>"  LOC = "P96"  ;
NET "N<1>"  LOC = "P95"  ;
NET "N<2>"  LOC = "P94"  ;
NET "N<3>"  LOC = "P93"  ;
NET "N<4>"  LOC = "P85"  ;
NET "N<5>"  LOC = "P76"  ;
NET "N<6>"  LOC = "P62"  ;
NET "N<7>"  LOC = "P61"  ;
NET "P<0>"  LOC = "P102"  ;
NET "P<1>"  LOC = "P101"  ;
NET "P<2>"  LOC = "P100"  ;
NET "P<3>"  LOC = "P97"  ;

#PACE: Start of PACE Area Constraints

#PACE: Start of PACE Prohibit Constraints

#PACE: End of Constraints generated by PACE