read_net_connectivity

read_net_connectivity
[ -lib s_libName ] 
[ -cell s_cellName ] 
[ -view s_viewName ] 
[ -verbose ]

Description

Reads and updates connectivity from an OpenAccess view, usually a schematic or netlist. This command is useful after reading a design from Virtuoso^® which has incorrect or incomplete connectivity with respect to a source schematic or netlist.

The layout instances must have names matching the source instances.

Space-based Router and Chip Optimizer will step through the instances in the source. For each instance, it will look for a like-named instance in the layout. If one is found, it will step through net connections on each pin of the source instance, making sure that the corresponding layer instance pins are connected to the same nets. It will create nets in the layout, if necessary, and ensure that top-level terminals in the layout are in the correct net, as long as the layout terminal names match the source.

Cases are supported where the source is hierarchical but the layout is flat. For example, given a schematic component A with an instance B1 (of component B), where component B contains two instances, C1 and C2 (of component C), the layout for A may contain instances with names B1|C1 and C1|C2, where | is the hierarchy delimiter.

By default, read_net_connectivity silently skips mismatch items (for example, a source instance with no corresponding layout instance). For additional information from the command, use the -verbose argument.

Arguments

`-cell` s_cellName	Specifies the name of the cell containing the source view. Default: Cell name for the active occurrence.
`-lib` s_libName	Specifies the name of the library containing the source view. Default: Library name for the active occurrence.
`-verbose`	Outputs information to the Transcript area about the connectivity changes.
`-view` s_viewName	Specifies the name of the view containing the source information. Default: `netlist`

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023