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problem with viewing schematic

Aritra
Hi ,

 I am using IC 6.1.3 . I am facing some problem with viewing the schematic. When I am making some layers in the LSW visible only, the schematic is not visible. Say I am making visible only metal1 . At this time if I open the schematic it will not show anything.

But If I make all layer visible then I can view the schematic fine. Is it possible to make the schematic view independent of the schematic ?

 I also have all set all layer valid form LSW. May I need to change some layer to non-valid?
  • skillUser

     Hi Aritra,

    The schematic and layout tools use the same sort of method for setting up display properties - a display.drf file specifies the display resources (line styles, "stipples" or pattern fills, colours used) by setting up "packets" for display.  Typically a schematic library does not have a technology and so it uses the default cdsDefTechLib for specifying its "technology" and this is what associates layer-purpose pairs with display packets. Again, typically for schematics the system layer-purposes and their associated display packets are defined, but it is entirely possible that your schematic comes from a library with its own technology, and this technology could be overriding the default setup for the packets used by the schematic LPPs.  For the LSW, if a layer is valid it is shown in the LSW, if it is not valid it is not shown - from the LSW you can then control the visibility and selectability of an LPP.  Again, typically the LSW is not needed for the schematic layers, they are system layers with visibility and appropriate selectability set by default.

    So I gave some background to help you understand where the problem might lie, I would suspect the schematic library has some (schematic) system layers being overridden. Perhaps, for example, the schematic LPPs are using the same packets as some of the layout packets, and when these are changed it impacts the schematic also?  Or perhaps there is a display.drf file that modifies the appearance of the schematic packets, so that the LPPs are not being displayed correctly?

    I hope that this helps you.

    Regards,

    Lawrence.

  • Aritra

    Thanks  Lawrence,

                                I am tring to resolve this problem by including the schematic LPP visible to my bindkeys associated with setting the desired layes visible. Now I am having another issue related to it. I can not find the LPP of the schematic.

    If I am selecting the schematic instance and do css()~>?? it does not contain the LPP associated. Or it may be some other place which I am unable to find. So how to get the schematics LPP now?

  • dmay

    This is the bindkey we use. It basically makes all of the system layers visible.

     foreach( l setof(lyr techGetTechFile(geGetEditCellView())~>lps  (lyr~>number >= 207) ) l~>visible = t) hiRedraw()

    Derek

  • vuong

    This is helpful. Thanks a lot.

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