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Sense gate metal1 in pcell(lowest hierarchy) and draw metal1 path to connect all gates in a row of 10 pcells in current hierarchy(1 hierarchy above than the lowest hierarchy).

SkillGakusei

Hello all,

I have instantiated ten units of basic nfet instance P-cells, arranged in 1 single row, all are aligned in y-axis, all are abbuting each other. I want to write a skill code that if i select all ten nfet instances, it should sense the metal1 over gate of the nfet instances and make a M1 metal path to connect all the gates of the ten nfets in my layout level, with a press of some key. Also, i cant desend into p-cell since access is denied. How can i do this?

Thanks

SkillGakusei




								


				
				
		

			
						
									
						
						
						
			
			
			
			
		


			













	

	

					



			








	
	
	
	



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    Often pcells have the ability to create structures like this themselves, by putting all the gates in a single nfet instance and turning on some parameter to connect the gates together.  Consult your pcell documentation to see what features are available!
    

    Failing that, I think VCR or Virtuoso-GXL has some kind of fancy auto-routing feature that can do this....
    

    Otherwise, you could code this up yourself with dbShapeQuery, dbGetHierPathTransform, dbTransformPoint/dbTranformBBox, and dbCreatePath.
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
				
				
				
		
		
    
			
		
    
	
    

    

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						in reply to tweeksii
					
									
    
	
    

		
		
    
					
    dbTransformPoint/dbTranformBBox: i could'nt find these in Cadence SKILL API Finder. 
    

    I know how to use dbCreatePath. About the rest, how to use them? What do you mean by query? 
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
				
				
				
		
		
    
			
		
    
	
    

    

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