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Compare instance CDF parameters with their default values

San

Hi,

I want to compare cdf param values of a Pcell instance in my library to that of the cdf param of same pcell in technology library. So I want to compare cdf param of my instance with their default values. 

Now I see lot of differences when I compare them. 

Someone told me I may need to use "formInitProc"  as many of the differences were because of initial values of cdf parameters when you place an instance. 

I am not sure how to use it, 

So do I need to open a blank cell view and place an instance of original Pcell symbol (from tech library) and then get cdfgData from that cell and run formInitProc on it and then compare the cdf parameters with my cell ?

So basically I am seeing this "fake" differences  because the cdf parameter values gets changed when we place them in a cellview. How to get rid of these differences which are not real. 

let me know if you need more explanation. 

I appriciate your  help.

Thanks

Sanket 

Parents
  • Hi Sanket, Unless all of the PCell parameters are stored on the instance (i.e. where the parameters have storeAsDefault 'true'), default values for parameters are not stored on instances. So only when the user enters a value that differs from the default is it stored on the instance (apart from the exception noted). How are you comparing the instance parameters? You can obtain the base cell CDF of the PCell master and compare the values there against the instance(s) values. If this does not seem helpful then you will probably need to supply some more details so folks can better understand the scenario and possible solutions. Best regards, Lawrence.
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  • Hi Sanket, Unless all of the PCell parameters are stored on the instance (i.e. where the parameters have storeAsDefault 'true'), default values for parameters are not stored on instances. So only when the user enters a value that differs from the default is it stored on the instance (apart from the exception noted). How are you comparing the instance parameters? You can obtain the base cell CDF of the PCell master and compare the values there against the instance(s) values. If this does not seem helpful then you will probably need to supply some more details so folks can better understand the scenario and possible solutions. Best regards, Lawrence.
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