Virtuoso XL: Having two separate libraries for layout and schematic

Hi andrew and all,
While doing layout using VXL, the instances in the schematic are mapped
to the corresponding 'layout' view in the same cell where the symbol is.
But if two separate libraries are used for layout design and schematic
design, is there a way to tell VXL that map this schematic library with
this layout library.

Thanks.


regards,
Suresh.J.

 

You can use the property

lxUseCell = "libraryName cellName"

on the symbol instance in your schematic or
master symbol view or
as CDF parameter for the cell.

Bernd

 

Bernd,
Thanks for the reply.

It would be great If we had an option (like 'lsUseLib') to be set in
the schematic library itself, so that we do not have to add the property
in each symbol view.But this could be done by a simple skill routine.
thanks.

regards,
Suresh

 

I ran into that same problem here. We have been copying the schematic
views into the layout library to solve this since we are not currently
using and DM tools. This has advantages and disadvantages thou.
Advantages; The layout can be locked to a paticular version of the
schematic so circuit designers can continue to make changes and submit
the change when completed, Layout can edit the schematic, if needed,
to debug verification or XL issues and not have to wait for the
designer to make the change. Of course the changes have to be relayed
back to the designer, when the layout is archived after tooling the
schematic is archived with it. Disadvantages; more storage space need,
schematic databases are not overly large but it is extra space,
caution is needed to insure that the design and layout schematics are
up to date for final verification.

Good Luck,
Tim

 

Hi Suresh,

Good news - in future, you will be able to use the Layout environment variable
"lxUseLibList" to specify a list of libraries to search if a layout view cannot
be found for the current cell in the current lib... this will be in the 5.0.33
USR4, 5.10.41 USR1 and 5.2.51 releases.

Regards,
Graeme.

 

Graeme,
Thanks.

My suggestion is to add the schematic library information too. For
example, if I have four libraries
design1_sch
design2_sch
design1_lay
design2_lay

I would like VXL to look at design1_lay when the symbol is from
design1_sch. and look at design2_lay when the symbol is from design2_sch.

If we merely specify a list of libraries to search for we would not be
able to specify the schematicLibrary:layoutLibrary mapping.

thanks,