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I am using virtuoso XL in cadence ic615.06.15.151. I noticed that Connectivity->Update->Layout Parameters do NOT update multiplier
parameter m of device in schematic. As a result, if schematic has been changed, and you tried to update layout parameters corrresponding to schematic, you are going to miss this kind of change, and you're going to find out when you run LVS. That's a big hassle. Is it a way to get around this ??
Have you checked that the parameters are set up correctly on the Layout XL Options form (Options -> Layout XL), look at the "Schematic Parameter Names" section under the "Parallel-connected factor" that the names match those used in the schematic, and that the 'm' factor names are not set up to be ignored during generation and update (in the "Ignore" section at the top of the form).
If this does not help you may need to supply more detail.
In reply to skillUser:
Thanks for your input. I did check layout xl options form as you said. I want to upload a picture of the form here, but I don't know how.
One more detail, if I delete old layout of that particular instance and regenerate it from schematic then it comes out OK, but if I used connectivity->update->Layout Parameters then it will update all parameters except m(multiplier)
In reply to pham777:
Use the Options tab when replying to a post to attach a picture.
In reply to Andrew Beckett:
Just a guess, probably try "Update -> Compopnents and Nets", because the m factor usually creates an extra device.
In reply to berndfi:
You beat me to it - indeed, you need to do Update Components and Nets.
Yes, it works when I do Update Components and Nets. But that's mean I can NOT use Connectivity->Update->Layout Parameters ??
then what is the use of this method ??