Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
virtuoso schematic composer_5.0.pdf
Скачиваний:
97
Добавлен:
05.06.2015
Размер:
3.8 Mб
Скачать

Virtuoso Schematic Composer User Guide

Form Descriptions

Edit Object Properties Form – Master Property

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.

Attachment Label specifies which object the property belongs to.

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

<property name> appears only when the selected property is on an instance. This option does not appear when the property is on a net, a terminal, or a cellview.

Master Value specifies the master symbol property value. You cannot edit this field.

Local Value specifies the local instance property value.

Display specifies whether the system displays the property name and property value in the schematic.

off displays neither the name nor the value.

value (default) displays only the value.

October 2002

753

Product Version 5.0

Virtuoso Schematic Composer User Guide

Form Descriptions

name displays only the name of the property.

both displays both the name and the value, separated by an equal sign.

Height specifies the height of the property label.

Font specifies a font for the property label.

Justification specifies where the label appears in relation to its origin (placement location).

Drafting, when enabled (default), maintains the normal orientation of the text as you rotate a label 180 degrees around a reference point. When this option is disabled, rotated text appears upside down.

Overbar is only a display option. You use this option to specify whether the software displays an overbar over a property label. When this option is disabled (default), the software displays underscore characters ( _ ) in the property label as part of the property label text string. When this option is enabled, the software interprets underscore characters ( _ ) in the property label as toggle switches that control where overbars begin and end. Overbars appear above the property label, as shown in the examples.

Property Name

Appears in Design Window As

_abcde abcde

ab_cde abcde

_abc_de abcde

ab_cd_ef_gh_ij abcdefghij

Caution

To avoid confusion when text actually contains underscore characters, Cadence recommends that you disable this display option. It is provided only for backward compatibility.

October 2002

754

Product Version 5.0

Virtuoso Schematic Composer User Guide

Form Descriptions

Edit Object Properties Form – Net Expression

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.

Attachment reattaches the net expression label to a wire or pin.

Property Name specifies the name of the property that can be used to override the default global signal. In other words, the name of the property whose value redefines the name of the net. The system evaluating the expression searches for the property that has this name to get the value to inherit for the net.

Default Net Name specifies the default property name of the global signal or net name. The system uses the default net name—for example vdd!, gnd!, or vss!—when an inherited connection has not been established. The name must specify a global scalar value.

Evaluated Name contains the result of evaluating the net expression for the current descend path of the window.

Height specifies the height of the net expression label text in user units.

Font specifies the font the system uses to display the net expression label.

October 2002

755

Product Version 5.0

Virtuoso Schematic Composer User Guide

Form Descriptions

Justification specifies where the label appears in relation to its origin (placement location).

October 2002

756

Product Version 5.0

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]