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editing input.scs not working in Assembler

HasanArd

Hi,

I am running IC6.1.7 and occasionally I need to edit the simulation netlist (for example to add a parasitic cap). One issue that I have is that I am using Assembler and it automatically generates a new "input.scs" file everytime hit simulation ->run.

So what I do is I go to the simulation directory, modify the input.scs, and then run the simulator standalone using the runSimulation command in the netlist directory. The problem is that when I load the PSF file in "Result Browser" the results are the same as before editing the netlist (it seems that the simulation didn't use the modified "input.scs" file)!! 

I would appreciate your comments on this. 

Thanks

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  • ShawnLogan
    1. ODear HasanArd,

    One issue that I have is that I am using Assembler and it automatically generates a new "input.scs" file when hit simulation ->run.

    This will occur unless you use a reference netlist. When you use a reference netlist, Assembler will not re-create the basic netlist file when it composed the input.scs file for each of the corner cases you have defined. I use this methodology to, for example, hand edit an extracted view based netlist in a set of corner cases in lieu of updating a layout to experiment with a potential layout change. I believe this will allow you to add your additional parasitic capacitor.

    The Assembler documentation provides information on how to use a reference netlist. I have also written a summary for colleagues if you need more information or help. To access a reference netlist for a simulation, click on the gearbox icon in the uppermost right corner of the Assembler GUI I show below in Figure 1.

    I hope this helps a bit!

    Shawn

     

    Figure 1

     

Reply
  • ShawnLogan
    1. ODear HasanArd,

    One issue that I have is that I am using Assembler and it automatically generates a new "input.scs" file when hit simulation ->run.

    This will occur unless you use a reference netlist. When you use a reference netlist, Assembler will not re-create the basic netlist file when it composed the input.scs file for each of the corner cases you have defined. I use this methodology to, for example, hand edit an extracted view based netlist in a set of corner cases in lieu of updating a layout to experiment with a potential layout change. I believe this will allow you to add your additional parasitic capacitor.

    The Assembler documentation provides information on how to use a reference netlist. I have also written a summary for colleagues if you need more information or help. To access a reference netlist for a simulation, click on the gearbox icon in the uppermost right corner of the Assembler GUI I show below in Figure 1.

    I hope this helps a bit!

    Shawn

     

    Figure 1

     

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