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Cadence hierarchy editor, view to use

gsimard

Hi,

 

I have a test bench TB in which I instanciate 2 symbols of the same device A. Within this device's schematic, there is a symbol B.

Cadence Hierarchy Editor sees two different instances of device A (say I1 and I2), but device B (say I3) is *shared* by both I1 and I2. This prevents me from specifying a different "view to use" for B in devices I1 and I2 (say schematic and extracted).

 Is there a way to have cadence generate two devices for B (say I3 and I4) ? This could solve my problem. The current release I'm using (5.10.41) does not allow me to use Occurence Bindings, which I thought could solve this issue.

 

Thank you for any advice,

Guillaume

  • Guillame,

    Occurrence Bindings are indeed what  you want. These are supported in IC5141 for the AMS simulator only (because they can be handled during elaboration). In IC61X they are supported in all ADE netlisters (OSS which is the netlisting system underneath was enhanced to allow the necessary expansion of the hierarchies to allow for different hierarchical occurrences).

    So unfortunately unless you're using AMS, or using IC61, there's no solution. Other than maybe creating a copy of A's schematic, and then setting I1 to schematic, and I2 to schematic_copy. Then you can independently set the binding for the instances of B in both schematic and schematic_copy separately.

    Regards,

    Andrew.

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