saveNetlist option changing view to functional from schematic- Innovus to Calibre

Kashif,

This question appears to be covering a number of different areas - and is not entirely clear because the flow used wasn't really described. Anyway, some points:

• Issues with Calibre LVS aren't best handled in these forums because Calibre is a Siemens Mentor tool, not a Cadence tool.
  • Note that Calibre has a capability to convert Verilog to CDL (which is a SPICE-like netlist format used for physical verification) - not sure if that's what is being used though.
• Options related to Innovus would be better asked on the Digital Implementation forum
• The only Custom IC but here I can see is where you mentioned "the top level is no longer schematic. It has changed to functional". That suggests that maybe you've used File->Import->Verilog in Virtuoso to import the Verilog and create schematics. However, it's not clear from anything else  you've said whether you've done that. Normally it will create functional views if the Verilog contains behavioural constructs (as obviously creating a schematic then becomes impossible). However, I don't know whether this is relevant either, since it's not clear that you used Import Verilog or what you expect to get out of this...

Regards,

Andrew.

Hi Andrew,

Thank you for your reply....and apologies if I erred on the forums...promise to be careful from next time :-)

You're right about me using File -> Import -> Verilog....the verilog file in this case is the "physical" verilog generated from the innovus backend; so on importing now I see the following warnings in the Virtuoso CIW

WARNING (VERILOGIN-127): Rejecting library, *******_****_****, cell, ******_DECAP*****, view, symbol, for module, ******_DECAP*****, because port gnd doesnot exist or is not present in the portOrder property.

WARNING (VERILOGIN-22): Module *******_***DECAP****, instantiated in the top module AES_SBOX_Registers, is not defined. Therefore the top
module AES_SBOX_Registers will be imported as functional.

Now, when I navigate to the path for the decap...I see that it just has a symbol..and no definition of any of the ports (just a png oa and tag files)...Any ideas how to resolve this?  Is this a Cadence issue or a PDK related issue?

Thanks!

Cheers,
Kashif

Hi Kashif,

It's likely to be an issue with the standard cell library, but the best thing to do would be to contact customer support. I don't think it's going to be terribly easy to diagnose this without seeing the data in more detail.

Regards,

Andrew.