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How to set the order of a PCell's Parameters?

aakhavan

In Cadence 5, the order of the pcells parameters in the Create Instance form was set by the order of the parameters in the pcDefinePCell function. However, using the same code in Cadence 6.1.5 results in the parameters being in a seemingly arbitrary order in the Create Instance form. Has anyone experienced this or found a work around?

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  • Yes, the CDF parameter names must match the pcell parameter names, and importantly it is really wise to have the CDF default match the pcell default (otherwise you have to set storeDefault=yes, because if the parameter's value is the same as the CDF's default then it won't get stored on the instance, and the pcell will thus get evaluated with the pcell's default - which is almost certainly not what you want; storeDefault=yes forces it to store even the CDF default on the instance. Note that this is only necessary if the two defaults differ, and it's best by far just to make them consistent).

    Andrew
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  • Yes, the CDF parameter names must match the pcell parameter names, and importantly it is really wise to have the CDF default match the pcell default (otherwise you have to set storeDefault=yes, because if the parameter's value is the same as the CDF's default then it won't get stored on the instance, and the pcell will thus get evaluated with the pcell's default - which is almost certainly not what you want; storeDefault=yes forces it to store even the CDF default on the instance. Note that this is only necessary if the two defaults differ, and it's best by far just to make them consistent).

    Andrew
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