Calibre How to run specific nets on xACT-3D and the rest of the design on xACT
Summary
3D select extraction extracts all nets selected for Calibre xACT and a subset of nets defined for Calibre xACT 3D and combines the results into a single parasitic netlist. Use this flow for high-accuracy extraction of critical nets with field solver accuracy on all layers.
Details
The flow is enabled when PEX Fieldsolver Mode statement is specified with the NETS|EXCLUDE_NETS keywords and the -3dselect option is specified on the command line.
PEX Fieldsolver Mode specified with the NETS option can appear more than once in your rule file.
for example:
SVRF Statement: PEX FIELDSOLVER MODE 600 NETS SOURCENAMES TOPLEVEL "clk"
Command line: calibre -xact -3dselect -rcc rules.top
Specifies that all layers on net “clk” are extracted with field solver mode 600. All other nets are extracted Calibre xACT.
SVRF Statements: PEX FIELDSOLVER MODE 200 EXCLUDE_NETS "B"
PEX FIELDSOLVER MODE 600 NETS "A" "Z"
Command line: calibre -xact -3dselect -rcc rules.top
Specifies that all nets are extracted by the field solver with mode 200 except for net “B”. Net B is extracted with Calibre xACT. Nets “A” and “Z” are extracted with mode 600.
PS. If PEX Fieldsolver Mode statement is specified without NETS or EXCLUDE_NETS keywords:
- only one PEX Fieldsolver Mode statement can be specified.
- all nets are extracted by the field solver, whether the -3dselect switch is used or not
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To enable the flow through the GUI:
- In the "Outputs" tab, choose the "xACT Mode" to be "xACT 3D Select"
- In the "Fieldsolver" tab, INCLUDE/EXCLUDE the nets that you would like to be extracted with xACT3D