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  3. multiple pins on same nets. Router is only routing 1 pin...

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multiple pins on same nets. Router is only routing 1 pin. How to get router to connect all?

rickydua
rickydua over 1 year ago

Hi, I am using VSR router to route my design. I noticed for certain layout cells, there are multiple pins on same nets. Router is only routing 1 pin. How to get router to connect all?

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  • Andrew Beckett
    Andrew Beckett over 1 year ago

    You almost certainly need to set up must connects on the pins. See these two short videos:

    • Virtuoso Pin Connectivity Model - Must Connect Pins
    • Virtuoso Pin Connectivity Model - Must Connect All Pins

    Andrew

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  • rickydua
    rickydua over 1 year ago in reply to Andrew Beckett

    Thank you Andrew.

    I used below lines


    term=dbFindTermByName(cv "vcc_ceehv1")

    dbSetTermMustConnectAllPins(term t)

    is that any different from what those videos you shared directed?

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  • rickydua
    rickydua over 1 year ago in reply to rickydua

    I do not see VSR router connecting those must joins at all with this approach dbSetTermMustConnectAllPins(term t)

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  • rickydua
    rickydua over 1 year ago in reply to rickydua

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