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How to find the Layer# and Purpose# that are not reserved in the technology file using SKILL ?

Marben

Hi All,
How to get the all the Layer# and Purpose# that are not reserved in the technology file using SKILL ?
Because I want to add new layers and purpose in my technology file by using SKILL,
I have a difficulty in finding the available Layer# and Purpose# manually in my technology file.
Please help.

Thanks in advance.
Best regards,
Marben

  • Marben,

    This is covered in the documentation. In the Virtuoso Technology Data ASCII Files Reference, in the Technology File Layer Definitions chapter, in the section for techLayers, it says:

    x_layerNumber

    Number of the layer.
    Valid values: A unique integer from 0 through 194 and from 256 through 231-1.

    Note: Layers numbered 195 through 255 are system-reserved layers.

    There is a similar section for techPurposes:

    x_purposeNum

    The purpose number.

    Valid values: A unique integer, 1 through 128 and 256 through 232-65535.

    Note: Purpose numbers 129 through 255 are system-reserved. Purpose number 0 is also system-reserved and is defined as "unknown".

    Regards,

    Andrew.

  • in reply to Andrew Beckett

    Hi Andrew,

    Thank you very much for the clear explanation.

    It helps me find the Layer# and Lpp# that are not system-reserved.

    Best regards,

    Marben

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