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PAD connections in Encounter

naderi

 Hello everyone, 

I have manually modified synthesized RTL to include pad cells and their connections, then, fed them to Encounter v6.2 for place and route. After place and route, I realized vdd and gnd net are not connected to any pin.

I am wondering if I have to remove pad cells from input RTL.

Also, other IOs are connected to the associated pads by a metal layer that has the minimum width. What is the best way to define width of metal layer for connecting to the pads.

Thanks,

Ali 

Parents

  • Hi Ali,

    I usually see vdd and gnd connected not in the netlist, but via the "globalNetConnect" command.  Maybe you could try that to see if you could define the power/ground connectivity you're seeking to establish?

    I'm not sure I understand the issue you're describing regarding minimum width connections between IOs and associated pads.  Perhaps this would be cleared up with globalNetConnect so that a specialized routers could operate on nets connecting to IO cell rather than NanoRoute.

    If you could post back with how things are looking after running globalNetConnect with more details on the minimum width issue, I'm sure the community could help give suggestions on where to look next.

    Hope this helps,
    Bob

Reply

  • Hi Ali,

    I usually see vdd and gnd connected not in the netlist, but via the "globalNetConnect" command.  Maybe you could try that to see if you could define the power/ground connectivity you're seeking to establish?

    I'm not sure I understand the issue you're describing regarding minimum width connections between IOs and associated pads.  Perhaps this would be cleared up with globalNetConnect so that a specialized routers could operate on nets connecting to IO cell rather than NanoRoute.

    If you could post back with how things are looking after running globalNetConnect with more details on the minimum width issue, I'm sure the community could help give suggestions on where to look next.

    Hope this helps,
    Bob

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