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Virtuoso Schematic Composer User Guide

Form Descriptions

Edit Object Properties Form – Symbol Pin

You use the Previous and Next buttons along with the Apply To options below to locate objects in your design window. When there are multiple objects in the selected set, you use the Next and Previous buttons to locate objects in the set. You use the Apply To options to specify the objects the software changes.

Previous cycles backward to view the preceding object in the selected set. When you reach the first object in the selected set, this button has no effect.

Next cycles forward to view the next object in the selected set. When you reach the last object in the selected set, this button has no effect.

Apply To consists of up to three cyclic fields that you use to specify the object, or group of objects in a selected set, whose properties you want to change. The software uses one color to highlight selected objects. But when there are multiple objects in the selected set, the software uses a second color to highlight the current object. And when you configure the cyclic fields to apply changes to multiple objects, the software uses a third color to highlight all the affected objects.

Selection scope specifies whether you want to edit only the current object, only the selected objects in the specified object type group, or all the objects in the specified object type group (which includes both selected and unselected objects of the specified object type).

Object group lists the object types in the selected set. Use this option to locate the first object of a particular object type.

Object filter appears only when the selection scope is set to all selected or all. This option acts as a secondary filter for further limiting the selection scope. The options vary depending on the selected object type.

Show specifies which properties the system displays on the form.

system displays the system-defined properties for a selected object.

user (default) displays the user-defined properties for a selected object.

Property lists the properties that the system automatically extracts from the design database.

Value displays the values for the corresponding properties.

Display determines whether the system displays the property value in the schematic. You can toggle this option to off to suppress the display.

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Direction specifies a direction for the pin.

When you enable the Show system option, the following options appear.

accessDir options let you specify a property that defines the valid direction from which a wire segment can be attached to a pin. You can specify combinations of these options. These options are not referenced in the Virtuoso® schematic composer environment; they are referenced in the place-and-route environment.

left specifies that the wire segment must be routed from the left.

right specifies that the wire segment must be routed from the right.

top specifies that the wire segment must be routed from the top.

bottom specifies that the wire segment must be routed from the bottom.

none specifies that a wire segment cannot be routed to the pin.

unknown specifies that any wire segment route is unknown.

The Add, Delete, and Modify options affect only the display of properties on the Edit Objects

Properties form. You must click OK or Apply to apply the changes to objects in your design.

Add displays the Add Property form, which lets you add a new property to the Edit Object Properties form.

Delete displays the Delete Property form, which lets you delete selected properties from the Edit Object Properties form.

Modify displays the Modify Property form, which lets you redefine properties currently displayed on the Edit Object Properties form.

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Form Descriptions

Edit Object Properties Form – Symbol Shape

You use the Previous and Next buttons along with the Apply To options below to locate objects in your design window. When there are multiple objects in the selected set, you use the Next and Previous buttons to locate objects in the set. You use the Apply To options to specify the objects the software changes.

Previous cycles backward to view the preceding object in the selected set. When you reach the first object in the selected set, this button has no effect.

Next cycles forward to view the next object in the selected set. When you reach the last object in the selected set, this button has no effect.

Apply To consists of up to three cyclic fields that you use to specify the object, or group of objects in a selected set, whose properties you want to change. The software uses one color to highlight selected objects. But when there are multiple objects in the selected set, the software uses a second color to highlight the current object. And when you configure the cyclic fields to apply changes to multiple objects, the software uses a third color to highlight all the affected objects.

Selection scope specifies whether you want to edit only the current object, only the selected objects in the specified object type group, or all the objects in the specified object type group (which includes both selected and unselected objects of the specified object type).

Object group lists the object types in the selected set. Use this option to locate the first object of a particular object type.

Property lists the properties that the system automatically extracts from the design database.

Value specifies the type of symbol shape.

The form displays various options depending on the shape type you select.

The following options appear when you select a line shape.

Width specifies whether the line shape is narrow (default) or wide. You can edit the text

field when you enable thewide option.

Point List specifies the coordinates for the points that make up the shape.

The following option appears when you select a polygon shape.

Point List specifies the coordinates for the points that make up the shape.

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The following options appear when you select a rectangle shape.

Upper Right specifies coordinates that define the upper right-hand corner of the shape.

Lower Left specifies coordinates that define the lower left-hand corner of the shape.

The following options appear when you select either a circle shape or an ellipse shape. Note that the Shape text field displaysellipse for both circle and ellipse shapes.

Center specifies the coordinates that define the center of the shape.

X Radius specifies the coordinate that defines the Xradius of the shape.

Y Radius specifies the coordinate that defines the Yradius of the shape.

The following options appear when you select an arc shape.

Center specifies the coordinates that define the center of the shape.

X Radius specifies the coordinate that defines the Xradius of the shape.

Y Radius specifies the coordinate that defines the Yradius of the shape.

Start Angle specifies the first point of the arc.

Stop Angle specifies the second point of the arc.

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