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How to change simulator options as dynamic parameter?

fomin

Is there any method to change simulator options as dynamic parameters?

For example I want to start simulation with errpreset="conservative" and after some simulation time change it to "liberal".

Another question how can I set simulation time to be stopped after some event?

For example if I run parametric or corner analysis for POR until POR event happened the simulation running very fast because internal oscillator is stopped. But after POR event the oscillator is ON and simulation runs much slower. I need to get only POR delay time, but it's change very wide for different corners, so I have to set the maximum simulation time and wait very long time to finish my corner analysis.

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  • Andrew Beckett

    If I remember rightly, reltol is handled specially by the dynamic parameter stuff - it knows about a few global options which can be changed this way. I'm not sure you can change any old parameter throughout the simulation. You might be able to do it by making the strobeperiod set to "mystrobeperiod" and then varying that, but I think that may not work too - give it a try. Otherwise you'll probably need to contact customer support (support.cadence.com) so it can be investigated properly and an enhancement request filed.

    You should be able to use skipstart and strobeperiod (this allows control over when the strobing starts). However, I suspect the other combinations may make spectre think that both strobing and skipping are in operation together. Anyway, if this is not behaving properly, I think customer support is the best bet so we can get it to R&D.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    If I remember rightly, reltol is handled specially by the dynamic parameter stuff - it knows about a few global options which can be changed this way. I'm not sure you can change any old parameter throughout the simulation. You might be able to do it by making the strobeperiod set to "mystrobeperiod" and then varying that, but I think that may not work too - give it a try. Otherwise you'll probably need to contact customer support (support.cadence.com) so it can be investigated properly and an enhancement request filed.

    You should be able to use skipstart and strobeperiod (this allows control over when the strobing starts). However, I suspect the other combinations may make spectre think that both strobing and skipping are in operation together. Anyway, if this is not behaving properly, I think customer support is the best bet so we can get it to R&D.

    Regards,

    Andrew.

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