system_top.ucf

xilinx ISE 实例代码。可用ISE直接打开

NET iRST_N LOC	 = "P79";  #| IOSTANDARD = LVTTL ;
NET iCLK	  LOC	 = "P76";  #| IOSTANDARD = LVTTL ;
  
NET oHSYNC LOC	 = "P34";  #| IOSTANDARD = LVTTL ;
NET oVSYNC LOC	 = "P35";  #| IOSTANDARD = LVTTL ;
  
  
NET oVGA_RED<0> LOC		= "P46";  #| IOSTANDARD = LVTTL ;
NET oVGA_RED<1> LOC		= "P45";  #| IOSTANDARD = LVTTL ;
NET oVGA_RED<2> LOC		= "P44";  #| IOSTANDARD = LVTTL ;
NET oVGA_GREEN<0> LOC	= "P43";  #| IOSTANDARD = LVTTL ;
NET oVGA_GREEN<1>	LOC	= "P42";  #| IOSTANDARD = LVTTL ;
NET oVGA_GREEN<2> LOC	= "P40";  #| IOSTANDARD = LVTTL ;
NET oVGA_BLUE<0>	LOC	= "P39";  #| IOSTANDARD = LVTTL ;
NET oVGA_BLUE<1>	LOC	= "P37";  #| IOSTANDARD = LVTTL ;
NET oVGA_BLUE<2>	LOC	= "P36";  #| IOSTANDARD = LVTTL ;

NET oHCCP   LOC = "P3"|IOSTANDARD = LVTTL;
NET oHCSI   LOC = "P2"|IOSTANDARD = LVTTL;

NET  iPUSHBUTTON<0> LOC = "P180" | IOSTANDARD = LVTTL ; 
NET  iPUSHBUTTON<1> LOC = "P181" | IOSTANDARD = LVTTL; 
NET  iPUSHBUTTON<2> LOC = "P189" | IOSTANDARD = LVTTL; 
NET  iPUSHBUTTON<3> LOC = "P80" ;#| IOSTANDARD = LVTTL;