Vlsi:Cadence Tips

Virtual Connections in Assura LVS

If you have two wires on a layout that are unconnected but will be connected together in a higher level then place a pin on both wires. When running Assura LVS you need to set some further options. Enable "View avParameters" and then click "Modify avParameters...". Find the "joinPins" option, enable it ("Use in run") and set it to "Top". Click OK to close the avParameters window. Now enable "View Additional Functions" followed by "Use joinableNet Function". Now click "Modify joinableNet Function...". In the new window enable "root cell?" then add your net to the "Net Names to Join" box and click "Add to Command List (below)" to add it. Click OK to close the joinableNet window and then run LVS as normal.

Fixing Voltage Storm (for an admin to do)

Replace $CDSDIR/tools/sev/bin/vsa2 with:

#!/bin/ksh

export LD_LIBRARY_PATH=/eee/vlsi/Cadence/2006/IC/tools/dfII/lib:/eee/vlsi/Cadence/2006/IC/tools/lib
/eee/vlsi/Cadence/2006/IC/tools/sev/bin/32bit/vsa2 $*

Install libtermcap.

zypper install termcap termcap-32bit

Fixing Assura label printing (for an admin to do)

If you specify nets to be extracted or want to have power supply nets labelled during extraction, Assura will use labprint which has glibc issues. To get around this problem, copy $ASSURADIR/tools/assura/bin/64bit/labprint to $ASSURADIR/tools/assura/bin/32bit/labprint and $ASSURADIR/tools/assura/bin/labprint. This only works for 64 bit machines obviously, but I've not found a solution that will allow 32 bit labprint to run.