Hi,
In performing a set of calibration trim tests, I found a reason I'd like to use corner groups with calcVal. It appears this is not allowed (per tool manual, in my version, which is IC6.1.8-64b.500.7).
Here is why I'd like that capability:
At this time I have incomplete specs for a bias current and a reference voltage, which are inputs to my circuit, but I do know their min/mean/max values. I would like to perform calibration over all 9 combinations of bias and reference, resulting in 9 trim codes. Ultimately this will feed Monte Carlo runs. Later, when the bias and reference blocks are designed, I can simply run calibration tests on them ahead of my block to get actual values for each MC run.
It would be very convenient if subsequent tests could find the matching corner group value to choose the right trim code from the set.
As I read the calcVal documentation, it seems the ?matchParams might do this across multiple non-group corners ("This argument considers the corners and sweep parameters in the same way."), but the ?cornerName will not accept corner groups.
When it is a true single corner, everything works. When I make a corner group with >1 values to a parameter, I get an error about not finding a corner with the right name (because it is now really a corner group, not a corner, I assume).
Functionally, I'd like this to behave as if a corner group would be matched correctly and the right trim code gets used when a subsequent test matches the parameters.
I suspect there may be a solution using ?matchParams, but avoiding specifying a ?cornerName, but I don't see it. Is there a compact way to get this working?
Thanks!