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how to get the orientation of the terminal in "symbol"

Derek WANG

Hi All.

I'd like to get the orientation of the terminal for the "symbol" view in the cadence.

Suppose I get the cellview ID by

cv = dbOpenCellViewByType(libId~>name cellId~>name "symbol" "" "a")

and then get the first terminal by

term = car( cv~>terminals )

and how can I find the orientation for the terminal "term", or the orientation of its corresponding shape of the pin.

Thanks in advance.

Best Regards

Yi

Parents

  • Yi,

    Terminals are a logical rather than physical object, so they don't have an orientation. The associated pins can be found by looking at term~>pins and for each pin you can find the pin figures by looking at pin~>figs (in IC5141 there could only be one, so it would be pin~>fig). Even in IC61X, a symbol will only ever have one pin figure (there can be multiple pins though).

    For symbols, these pin figures are nearly always shapes (e.g. a rectangle or ellipse (circle)), and shapes do not have an orientation.

    So I'm not really sure what you're trying to find here and why you need that. Perhaps if  you explain your motivation, then I could suggest a different approach?

    Regards,

    Andrew.

Reply

  • Yi,

    Terminals are a logical rather than physical object, so they don't have an orientation. The associated pins can be found by looking at term~>pins and for each pin you can find the pin figures by looking at pin~>figs (in IC5141 there could only be one, so it would be pin~>fig). Even in IC61X, a symbol will only ever have one pin figure (there can be multiple pins though).

    For symbols, these pin figures are nearly always shapes (e.g. a rectangle or ellipse (circle)), and shapes do not have an orientation.

    So I'm not really sure what you're trying to find here and why you need that. Perhaps if  you explain your motivation, then I could suggest a different approach?

    Regards,

    Andrew.

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