Difference between revisions of "CDS TT"

Revision as of 17:24, 8 June 2016

Purpose of this tutorial is how to export edif out of Cadence Virtuoso

^NB! To first import your design into Virtuoso, use this tutorial.

Setting up the environment

following commands are all in commandline

• move to your design folder noc_synth
• I have a separate folder for virtuoso, to keep folder structure more clear.
• using command 'cad', choose option '1' to initialize environment variables for Cadence tools.

Bringing up Virtuoso

• If you have never invoked following command in your current design folder, then there is a great possibility that you have not imported your design yet and you should follow this tutorial first.

ams_cds -64 -tech c18a6 -add CORELIB -add IOLIB_6AM -add GATES_ANA

• If you are sure that you have invoked previously that command and you have design imported, you can bring up Virtuoso with following command.

ams_cds

Exporting edif

For exporting previously imported design we need to only use this window.

From that window search under 'File' menu 'export' and click 'EDIF200'

This should bring up a following window

First step is to 'Browse' for your design.

Find your design by selecting your designs 'Library', then a 'cell' that you want to export and finally 'schematic'. Close the window just by clicking 'Close' and your design should be included now in the Export window.

Final steps before exporting:

• Set External Library to 'CORELIB'
• Give your design a name by filling Design Name
• Give Output File name
• Set Output format to 'Netlist'
• Select 'Expand All Objects Except Ports'
• Set Netlist Transition Mode to 'Flat'

When these options have been set, you can push OK to export your design in edif.

NB! After Clicking OK there should appear a prompt for displaying the export log. Check it to make sure that 'Writing cell cds_thru' is NOT present there. If it is, then you should re-visit importing your design. This line generates 'INOUT' ports in the EDIF and TT cannot understand them.