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Virtuoso Schematic Composer User Guide

Form Descriptions

Descend Form – Iterated Instance

Iteration Number lets you type the iteration you want to descend into.

View Name lists the existing views for the selected instance.

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Form Descriptions

Descend Form – Multisheet

View Name contains a list of the existing views for the selected instance.

Display specifies the type of sheet you want to descend into. index descends into the index sheet.

sheet (default) descends into the sheet number you specify.

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Form Descriptions

Descend Form – Noniterated Instance

View Name contains a list of the existing view names for the selected instance.

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Form Descriptions

Display Options Form

Net Expression Display allows you to choose how a net expression label will be displayed.

The net name can vary depending on the sequence of instances through which you have descended. If you have descended down through an instance that has a netSet override property, the overriding signal name is displayed in the schematic editor window.

Display preferences for net expressions and evaluation for a particular descended branch of the hierarchy are as follows:

 

Property gnd not

Property gnd found

 

and specifies

 

found

 

mygnd!

 

 

value only

gnd!*

mygnd!*

value (default)

gnd! (gnd!)*

mygnd! (gnd!)*

value [property

gnd! [gnd]*

mygnd! [gnd]*

name]

 

 

value

gnd!

mygnd!

[expression]

[@gnd:%:gnd!]*

[@gnd:%:gnd!]*

expression only

[@gnd:%:gnd!]*

[@gnd:%:gnd!]*

Property gnd found and specifies a local signal “A” two levels down from the top

/I1/I2/A*

/I1/I2/A (gnd!)*

/I1/I2/A [gnd]*

/I1/I2/A

[@gnd:%:gnd!]*

[@gnd:%:gnd!]*

Drag Limit lets you specify the maximum number of shapes whose movement is shown in the design window during a move or copy operation. When the total number of shapes exceeds the specified maximum, the system substitutes a bounding box for the set of shapes.

Axes specifies whether the schematic editor displays the X and Y axes when you view or edit a schematic view.

Object-Sensitive Pop-Up Menus lets you use the middle mouse button to open a menu of commands. The menu varies depending on the object currently under the cursor.

off disables this option. When you turn this option off, the default pop-up menu appears whenever you press the middle mouse button while an object is selected.

on (default) enables this option.

Dynamic Highlighting highlights the objects in the design that are affected when certain active commands are implemented.

off disables this option.

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Form Descriptions

on (default) enables this option.

Show Direct Connections shows the connection between pins.

off (default) disables this option.

on enables this option.

Show Text Justification displays a plus sign (+) in the design wherever a text string begins.

off (default) disables this option.

on enables this option.

Gravity affects how the Add – Wire command is completed. When you add a wire to a block instance, the system terminates the wire on the edge of the block. When you add a wire to another type of instance, the system terminates the wire on the instance pin.

off disables this option.

on (default) enables this option.

Display Status Banner displays an extra line of status information in the status banner of the design window. The status line displays the coordinates for the pointer or the selection count. When disabled, the Coordinates on Status Banner option disappears from the form.

off disables this option.

on (default) enables this option.

Coordinates on Status Banner displays the coordinates of the current mouse position in the status banner. This option appears only when Display Status Banner is on.

off (default) disables this option. on enables this option.

Grid Controls

Type controls the display and the appearance of the grid. none turns off the grid display.

dotted (default) displays a grid of dots. line displays a grid of lines.

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Spacing specifies the number of user units between minor grid points on the visible grid. The default is 0.125.

Multiple specifies the number of minor grid points. The default is8.

Snap Spacing specifies the minimum distance the cursor moves, in user units. The default distance (0.0625) is equal to half the default grid spacing distance.

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