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The ReadCdsLmap keyword

This technology file keyword allows import of a Cadence Virtuoso layer mapping file. This file provides the layer/datatype numbers for the layers defined in the display resource file. It is important that these numbers be equivalent in Xic for success in transferring design data via GDSII or OASIS files. The file is generally provided within a process design kit. The name of the file will vary, in one case it is the name of the technology with a ``.layermap'' extension.

The syntax is

ReadCdsLmap filename

The filename is a path to the Virtuoso layer mapping file. This must appear in the Xic technology file after the ReadCdsTech line, as the layers must exist in the Xic database before they can be assigned a GDSII mapping.

Stephen R. Whiteley 2022-05-28