EDA Interfaces

Example of Fewer Output Pins than EDIF Output Ports

In this example, if the -Q<0> port drives a net (or signal) within the EDIF netlist, the Quartus® II Compiler generates the warning Net has no source because no source pin is driving the signal.

BEGIN
   FUNCTION	 dff 	(CLRN, CLK, D, PRN) 
     RETURNS 	 	( ,Q) 
   FUNCTION		"LS74"  ("-CL", "CLOCK", "D" <0> ,  "-PR") 
     RETURNS 		("-Q <0> ", "Q <0> ")
END


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