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CDF parameters go away after instance pointer(library/cell name) changes

Prakash Shenoy

Hi,

   I have a set of schematics for which I need to change the instance pointers to a different library and a different cellname(with prefix changed). I managed to do it by changing master of the instance to the new cell. But, all the CDF parameter associated with the instance went away. Is there a way to avoid this? or is there a better way to change the pointer without affecting the CDF parameters? Thanks,

Regards,

Prakash.

  • Prakash,

    Two things:

    1. Does the new cell have CDF parameters defined at all? (Tools->CDF->Edit CDF will show you)
    2. Even if it does, if there are parameters which existed on the old cell but don't on the new, and those parameters were at their default values on the old instance, they will not show up on the new instance (if storeDefault=no on the old cell's CDF for that parameter). If they were at non-default values, or storedDefault=yes, then those parameters would show up as user-defined properties on the instance after the change.

    Regards,

    Andrew.

  • Thanks Andrew for the reply. The new cell doesn't show any CDF parameters defined when I checked it from Tools->CDF->Edit, but the old cell does have the parameters. I changed the parameter values to non-default and then made storedefault to yes for the old cell and the tried changing the pointer. Bust still same result.Regards,Prakash.

  • I may not have been completely clear. CDF parameters won't show up at all if you don't have CDF in the new cell.

    Also, retrospectively setting storeDefault on the old CDF won't help you either, because it will only store the default value at the time the parameter value is changed back to default, or on initial placement of the instance. Even if storeDefault was on, and all the parameters had been stored on the instance itself, if there's no CDF in the new cell, everything would show up as "user defined properties" - which presumably is not useful.

    So the real problem that you need to address is the lack of CDF on the new cell, I'd say.

    Regards,

    Andrew.

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