adder4.pcf

这是个基于 Xilinx Spartan3 的加法器

SCHEMATIC START ;
// created by map version G.35 on Sun Dec 18 17:59:00 2005 
COMP "cin" LOCATE =  SITE "LB" LEVEL 1; 
COMP "ina<0>" LOCATE =  SITE "BANK1" LEVEL 1; 
COMP "ina<1>" LOCATE =  SITE "BANK1" LEVEL 1; 
COMP "ina<2>" LOCATE =  SITE "BANK1" LEVEL 1; 
COMP "ina<3>" LOCATE =  SITE "BANK1" LEVEL 1; 
COMP "inb<0>" LOCATE =  SITE "BANK2" LEVEL 1; 
COMP "inb<1>" LOCATE =  SITE "BANK2" LEVEL 1; 
COMP "inb<2>" LOCATE =  SITE "BANK2" LEVEL 1; 
COMP "inb<3>" LOCATE =  SITE "BANK2" LEVEL 1; 
COMP "sum<0>" LOCATE =  SITE "BANK0" LEVEL 1; 
COMP "sum<1>" LOCATE =  SITE "BANK0" LEVEL 1; 
COMP "sum<2>" LOCATE =  SITE "BANK0" LEVEL 1; 
COMP "sum<3>" LOCATE =  SITE "BANK0" LEVEL 1; 
COMP "cout" LOCATE =  SITE "LB" LEVEL 1; 
SCHEMATIC END ;