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Cadence ADE Simulating .spi of Standard Lib using Spectre

tstoll

 Hi -

I have a PDK in which I have all standard cells (inverters, nands,etc.) defned in one common .spi file.
I have standardlib symbols and used them within my analogic schematic for simulation.

I defined on the toplevel global vdd!, gnd!, and also used CDF (VDD netSet vdd!, and VSS netSet gnd!) to be sure that the instantiated inverter has its correct supply and ground voltage.

The .spi standard Lib file I included via the Simulation Files Setup menue (Stimulus File).

It is netlisting and simulating.. but the inverter is not inverting.. the output follows exactly the input.

Any hint on that?

I do not know if that has something to do with it, but at the beginning, I see in the simulation log file following message:

" Unable to compile ahdlcmi library, see input.ahdlSimDB..
" Could not open ahdlcmi module library input.ahdlSimDB.."

I appreciate every comment !!

Cheers,
tOM

Parents
  • Andrew Beckett
    You must have another source in parallel somehow. Hard to know since I can't see precisely what you've done.

    Coming back to your earlier point - if the included netlist relies on global connections, you can't make it non-global later. If the supply connections to the standard cells were via pins, you could use the netSet approach so that your symbols still only have the signal pins, but the stopping view has the additional pins with netExpr on them. You'd have to edit the .SPI to have power supply pins on every standard cell, and not make them global.

    You might be better off contacting customer support about this then we can take a look at precisely what you've done without you needing to share potentially confidential information in a public forum.

    Regards,

    Andrew
Reply
  • Andrew Beckett
    You must have another source in parallel somehow. Hard to know since I can't see precisely what you've done.

    Coming back to your earlier point - if the included netlist relies on global connections, you can't make it non-global later. If the supply connections to the standard cells were via pins, you could use the netSet approach so that your symbols still only have the signal pins, but the stopping view has the additional pins with netExpr on them. You'd have to edit the .SPI to have power supply pins on every standard cell, and not make them global.

    You might be better off contacting customer support about this then we can take a look at precisely what you've done without you needing to share potentially confidential information in a public forum.

    Regards,

    Andrew
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