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Symbol/Schematics for Ultra Style PCell

meredith

I have created three PCells and combined them into one PCell using a callback with the radio button option.  For example, the user instantiates PCell Top on the create instance form or edit objects form there is a radio button with three options PCell A, PCell B and PCell C.  Each of these PCell's contains different connectivity but all three have the same BJT's.  

Is it possible to create one top or master symbol to reference three different schematics in the same fashion as PCell Top (place one symbol, depending on the radio button the user descends into schematic for PCell A, PCell B or PCell C)?  I have seen a couple of discussions reference a super-symbol but I can not find any documentation explaining how to create a super-symbol or what a super-symbol is.

I'm running CIC 6.1.6 ISR 12.

  • Ultra style pcells are pcells which instantiate other pcells and pass the parameters from the parent to the instances. Pins may have to be copied to make them accessible at the parent level.

    This is probably one where you need to create a symbol pcell Top which instantiates the proper subcell symbol (A, B or C) and then copies up the pins into the Top symbol. Parameters are passed from the instance of Top placed in its parent to the instance A, B or C inside of the master.

    Connect the instTerms on the instance to the net on the pin in Top.The schematic for A, B or C could then be a static cell. When the cell is pushed, it should switch views from the cell symbol instance to the schematic.

    This is one you will have to experiment with, please post your findings.


    Ted

  • Thank you for your response Ted.  I like the idea of creating one symbol that will instantiate multiple subcell symbols but I'm not sure how to create this type of symbol.  Could you give an explanation or point me to a manual?

  • Hi Meredith

    There is lots of info on the forum. Here is a starting point.

    http://community.cadence.com/cadence_technology_forums/f/48/t/27059

    Evaluating the callbacks

    http://community.cadence.com/cadence_technology_forums/f/48/t/30812

    And more

    http://community.cadence.com/cadence_technology_forums/f/48/t/14462

    And for further enlightenment:

    http://community.cadence.com/cadence_technology_forums/f/38/t/2612

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