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ADE-XL pre-run sequence confusion

danmc91

Hello,


I think I'm missing something fundamental about when a pre-run script is or is not run in ADE-XL.  What I'm trying to achieve is:

- define a small handful of process corners in the Corners section.

- my test involves running a transient simulation and extracting a scalar (actually a small handful of scalar) value

- for each corner

  1. run the pre-run at a nominal temperature and supply (my pre-run script enforces this part) to do a SA calibration routine to obtain some digital trim codes
  2. for each supply voltage in min/nom/max do:
    1. run a temperature sweep keeping the pre-run trim and producing a plot of my scalar values versus temperature
  3. record the max-pre_run_nom and min-pre_run_nom values of these scalars (can calcVal() access a pre-run result?)

- tabulate my trim codes over process corner

- tabulate my min/max deviations over temperature and supply for each process corner

What I'm seeing is that if I try to sweep tempeature by defining a global variable called "temperature" with a sweep spec, the pre-run script is run for each point.  That gives a huge overhead because I have 12 bits that are obtained via SA which means my trim sims take 12x as long as a single temperature point and thus the whole process takes 12x as long.  Also I've noted that if I right click on one of these results in the Results tab and do "plot across design points" I get a plot of the value versus numbered design points where I'd like the x-axis to be the temperature.

The last bit is I can't then seem to define overall output for a process corner which is the min/max deviation from the pre-run condition of my outputs.


Unfortunately this is about what I've hit each time I've tried to make the jump from Ocean to ADE-XL.  I feel like I'm really close but can't quite get what I actually want.  Then I typically get frustrated and go back to the ocean sims but lose out on things like the more built in ability to parallelize jobs and more automatically show limits.

Thanks

-Dan

Parents

  • Hi Dan,

    I suspect that my answer to your other post is going to be the easiest way of doing this, but the pre-run script is indeed run before every simulation. However, you can (with a bit of smartness) avoid it actually running a simulation every time. We have some workshop data that shows how to do a number of these more complex scenarios, and can provide that to help explain how to use pre-run scripts.

    For this however, you'll need to contact customer support as it's not published in a public place. It's a bit too much of a lengthy explanation for me to post here (I only have limited time today and I'm trying to get through a bit of a backlog of questions on the forums so am having to keep my responses short).

    Regards,

    Andrew.

Reply

  • Hi Dan,

    I suspect that my answer to your other post is going to be the easiest way of doing this, but the pre-run script is indeed run before every simulation. However, you can (with a bit of smartness) avoid it actually running a simulation every time. We have some workshop data that shows how to do a number of these more complex scenarios, and can provide that to help explain how to use pre-run scripts.

    For this however, you'll need to contact customer support as it's not published in a public place. It's a bit too much of a lengthy explanation for me to post here (I only have limited time today and I'm trying to get through a bit of a backlog of questions on the forums so am having to keep my responses short).

    Regards,

    Andrew.

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