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layer numbers rule deck

oldnick

I'm wondering if there is a way to get cadence to report the numbers it assigns to layers.

I'm trying to modify an lvs rule deck to recognise a specific structure. To do this I need to create a recognition layer/region which comprises a layer named CTM2, however this layer is not declared in the lvs rule deck.

If we look at TGOX in as declared in the ruledeck, 

layer   MAP     21      DATATYPE        0       10021

layer   TGX_drw                                             10021

there are 3 numbers associated with it. For the layer I want to add I know two of them, but not the 3rd.

layer MAP  92   DATATYPE            0        ?????

layer CTM2_drw                                         ?????

As far as my understanding goes, the 0 specifies the data type and the first number is the layer number it is mapped to by the stream tool. I think the 3rd number is one that cadence uses to identify it. For most layers in the rule file, the 3rd number is usually the 1st number with either 10 or 100 appended to the front, although a few times it is something completely different, so, I can't really have a guess. Is there some way I can get cadence to report this number? I've been looking for ages but can't find anything. Or are my assumptions wrong and the solution something different?

Cheers,

Nick

Parents
  • oldnick
    It's PVS I'm using. I apologise for referring to virtuoso as Cadence, everywhere I have worked has always referred to virtuoso simply as Cadence. Are you sure the number is arbitrary, I've been led to believe that it is the number that virtuoso assigns to the layer (hence my question asking if there was a way to get virtuoso (cadence) to report this number, I can get virtuoso to order the layers based on this number but I can't get it to report it) , so in the rule deck, layer MAP 21 DATATYPE 0 10021, is the instruction to map the layer 10021 to layer 21. If the number is arbitrary, then why is it included in the rule deck?
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  • oldnick
    It's PVS I'm using. I apologise for referring to virtuoso as Cadence, everywhere I have worked has always referred to virtuoso simply as Cadence. Are you sure the number is arbitrary, I've been led to believe that it is the number that virtuoso assigns to the layer (hence my question asking if there was a way to get virtuoso (cadence) to report this number, I can get virtuoso to order the layers based on this number but I can't get it to report it) , so in the rule deck, layer MAP 21 DATATYPE 0 10021, is the instruction to map the layer 10021 to layer 21. If the number is arbitrary, then why is it included in the rule deck?
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