Virtuoso XL Layout Editor User Guide

Wire Editing in the Virtuoso XL Layout Editor

Allow Orthogonal Jogs turned on

Allow Orthogonal Jogs turned off

Route To Cursor

Route To Cursor creates path segments, on single or multiple layers, that follow the direction of the cursor from the previously digitized point.

To use the Route to Cursor command, do the following:

1.From the layout window, choose Create – Path.

2.From the layout window, choose Options – Route.

Virtuoso XL Layout Editor User Guide

Wire Editing in the Virtuoso XL Layout Editor

The Route Options form appears.

3. Turn Route To Cursor on.

Single Layer

To route multiple path segments on a single layer, do the following:

1.Turn Single Layer on and click Apply.

2.Click or area select a connectivity object (pin, via, or an existing path).

The multi-segment path is routed on the active layer and follows the direction of the cursor.

Multiple Layers

To route paths on multiple layers, do the following:

1.Turn Multiple Layers on and click Apply.

2.Click or area select a connectivity object (pin, via, or an existing path).

Virtuoso XL Layout Editor User Guide

Wire Editing in the Virtuoso XL Layout Editor

The path follows the cursor and changes layers. Vias are added automatically as layers change.

Second digitized point

First digitized point

For example, when routing a metal1 path and crossing over another metal1 path with the cursor, paths will not be pushed, the layer is changed, and a via is automatically inserted.

Follow Layer Direction

To route paths that follow the layer directions set in the rules file, do the following:

1.From the Route Options form, turn Multiple Layers on.

2.Turn Follow Layer Direction on and click Apply.

3.Click or area select a connectivity object (pin, via, or an existing path).

Virtuoso XL Layout Editor User Guide

Wire Editing in the Virtuoso XL Layout Editor

The paths are routed on multiple layers, vias are added automatically as layers change, and the layer direction set in the rules file is strictly enforced.

Second digitized point

First digitized point

For example, when the routing direction in the rules file is as follows:

metal1 vertical

metal2 horizontal

When routing from a metal1 pin in the horizontal direction, the layer direction is strictly followed; a via is inserted and the path is routed on metal2. The layer direction continues to be followed as the path is routed and vias are automatically inserted as the layer direction changes.

Note: The Route To Cursor setting is not available when you are routing a bus, bundle, or differential pair.

Allow Floating Nets

Floating nets are routes that do not start or end on a pin or other terminal object of a net.

To create a floating net, follow these steps:

1.From the layout window, choose Create – Path.

The layout window prompts you to enter a point or select an area to start the path.