Virtuoso Pre-Route Browser
The Virtuoso Pre-Route Browser is a standalone router setup utility that is independent of the router and design style. It is used for identifying order and preferences of nets for routing.
The Pre-Route Browser has the following components:
Pre-Route Browser Toolbar
The following table describes the Pre-Route Browser toolbar buttons.
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Icon
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Command
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Description
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Toggle Pre/Post Data
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Lets you toggle between the pre and post routing data.
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Save Table Content
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Saves the content of the results table in the Routing_results.xml file.
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Load Columns
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Lets you load data for custom columns. Pre-defined column data is not altered.
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Show Routed Nets
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Toggles display of the routed nets in the design.
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Show Unrouted Nets
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Toggles display of the open nets in the design.
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Show Nets With Pin Count = 1
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Toggles display of the nets with pins count as one.
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Show Grouped Nets
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Displays only the grouped nets.
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Snapshot Selected
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Toggles display of the selected nets in the design. If the Show Selected Nets Only is switched ON then the table displays only the nets that are currently selected in the Navigator assistant or layout canvas.
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Synchronize Snapshot
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Synchronizes the net selection in Routing Results Browser with the ones that are currently selected in the Navigator assistant or layout canvas
This option Sync works in conjunction with the Snapshot Selected option. Once you have created a snapshot of selected nets, the Synchronize Snapshot button updates the snapshot to match what is now selected in the Navigator assistant or layout canvas.
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Select All
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Selects all the nets that are displayed in the Routing Results Browser.
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Deselect All
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Deselects all the nets that are displayed in the Routing Results Browser.
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Create Group/Add Nets
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Creates a group for the selected nets.
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Delete Group/Remove Nets
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Deletes the selected group or the group on the selected net.
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Rename Group
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Lets you change the name of the net group.
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Refresh Table
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Refreshes the results table in the Pre-Route Browser.
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Ideal Wire Length Computation
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Lets you select the method or algorithm for calculating the ideal wire length. The different methods or algorithms of routing are: MST, Steiner, and Spine.
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Results Table
The following table describes the columns displayed in Routing Results Browser.
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Column
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Description
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Net
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Displays the name of the net.
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Group
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Displays the name of the net group.
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Sets
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Displays general navigator net sets. It does not have mutual exclusivity requirement of groups.
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Opens
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Display the number of opens for each net in the design.
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Shorts
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Displays the number of shorts for each net in the design.
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Trunks
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Displays the number of trunks on a net.
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Ideal Wirelength
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Displays the ideal length of the wire.
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Wirelength
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Displays the actual length of the wire.
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IO Pin Edge
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Displays the edge of the IO pin on the net.
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IO Pin Layer Unique
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Displays the layer name for the net on which IO pin exists.
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Pin Count
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Displays the total number of pins for each net in the design.
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Manhattan X
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It is the x-distance of the union box of all the nets pin boxes.
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Manhattan Y
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It is the x-distance of the union box of all the nets pin boxes.
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Related Topics
Routing Assistant
Accessing the Routing Assistant
Routing Assistant User Interface for Chip Assembly Routing Flow
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