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The Dump LVS Button: Test Layout vs. Schematic
This function compares the netlists obtained from the physical and
electrical data for the current cell, and lists topological and
electrical differences. When the Dump LVS button is pressed, a
small pop-up appears, which contains a field for setting the name of
the output file, and has provision for setting the depth into the
hierarchy to compare. The default name for the output file is the
base name of the current cell, with a ``.lvs'' extension, and
this will be written in the current directory unless a path is given
to the file name. Entering 0 for the depth compares the current cell
only, 1 compares the current cell and immediate subcells, and so on.
The user is given a chance to view the output file upon completion.
If computed wire capacitance is included in the electrical data, the
capacitors will be recognized by virtue of having a special name
prefix ``C@NET''" and treated specially. Unlike other devices,
there is no corresponding physical device. If found, the values will
be compared with the corresponding computed net capacitance in the
physical data, and an error will be reported if the two numbers differ
by 1 percent or more. Wire net capacitance is considered only for the
capacitors that are found in the electrical data, i.e., if they are
missing no error is generated.
Subsections
Next: LVS Output File Format
Up: The Extract Menu: Extraction
Previous: The Dump Elec Netlist
Contents
Index
Stephen R. Whiteley
2006-10-23