How to read output of a 32bit bus in a transient simulation using Spectre ?

Dear Mehrdad,

I tried an example using the SKILL routine described at the On-line support article at URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000nW2AEAU&pageName=ArticleContent

and assembled a set of screenshots that might help you. See what you think...

Shawn

The file is attached below:

create_digital_busses_from_analog_waveforms_sml_032922vp0.pdf

Thanks Shawn,

I will give it a try and let you know.

I hoped that when in the vector file we define output signals ( like when we put o in io line) .. It actually records the output buses and signal values in a file.

Dear Mdad,

Mdad said:

I hoped that when in the vector file we define output signals ( like when we put o in io line) .. It actually records the output buses and signal values in a file.

I m afraid, I'm not quite understanding what you mean by this statement - sorry!  I tried to show that the waveform can be exported to a file in (x,y) format with x being time and y being its digital representation in the file I attached. I've made a quick screen recording bit it appears its size prevents me from uploading it. Hence, I placed a shared link of it as shown below

Shawn

www.dropbox.com/.../digital_bus_exported_to_csv_file_sml_033022r.mp4

Thanks Shawn,

I also could use the analog to digital function under measurement to create the same bus and saved it to file.

What I meant in my post was that in vector file we define input, bidirectional and output signals.  I donot know what is the purpose of defining output signal in vector file, since I donot see any effect of that during simulation. I thought maybe it saves the output signals that are defined in vector file somewhere, but I couldnot find anything.

Thanks again,

-Mehrdad

Mehrdad,

Output vectors are used in some flows (I think in Ultrasim; not sure off the top of my head with Spectre) for it to check that the output signal in the circuit matches the vector file to determine the correctness of the simulation results. So input signals generate signals, and output signals check the circuit against the expected output. It is not used to generate an output file though...

Andrew

Mehrdad,

Output vectors are used in some flows (I think in Ultrasim; not sure off the top of my head with Spectre) for it to check that the output signal in the circuit matches the vector file to determine the correctness of the simulation results. So input signals generate signals, and output signals check the circuit against the expected output. It is not used to generate an output file though...

Andrew