Download PowerLogic User's Guide - Electrical and Information Technology

Design Toolbox
7. Choose OK. The hierarchical symbol appears in the Part Editor window.
Because the symbol is a hierarchical one, it has no pin numbers. The pin name
associated with the hierarchical symbol pins identifies the net name of the connection
that is tied to the pin. All pins on a hierarchical symbol must have a pin name. You
cannot complete the hierarchical symbol until you assign a name to each pin.
8. Name pins in the Part Editor and choose File/Complete. This closes the Part Editor
and the new symbol follows the cursor movement.
9. Move the symbol and indicate its location.
You can navigate this hierarchy with the View/Push and View/Pop commands.
Creating a Bottom-Up Hierarchy
In bottom-up design, you create a hierarchical symbol for an existing sheet that
represents the underlying logic.
PowerLogic adds an input or output pin in the symbol for each off-page reference on the
schematic sheet. PowerLogic places off-page references with a pin type of Source on the
left side of the hierarchical symbol and off-page references with a pin type of Load on the
right side.
Note: Pin types for off-page references are defined in the library under electrical.
1. Choose the File/Open command to load the schematic job file.
2. Switch to the sheet that you want to add the hierarchical symbol to, or add a new
schematic sheet to the sheet set with the Setup/Sheets command.
3. Choose the Design Toolbox icon from the toolbar. See the "Design Toolbox" topic in
this chapter for more information.
4. Choose the New Hierarchical Symbol icon from the Design toolbox. The Hierarchical
Symbol Wizard dialog box appears.
5. Choose an existing sheet from the Sheet Number drop-down list box.
6. Type the symbol name in the Sheet Name text box.
7. Choose the Pin Decal for both input and output pins from the appropriate drop-down
list box. Once you have specified the pin details, you can optionally choose Preview
to display the symbol outline. The number of input/output pins is grayed because
PowerLogic knows the number of pins of each pin type on an existing sheet.
8. Choose OK. The hierarchical symbol appears in the Part Editor window. An input or
output pin is added in the symbol for each off-page reference.
9. Choose File/Complete. This closes the Part Editor and the new symbol follows the
cursor movement.
10. Move the symbol and indicate its location.
You can navigate this hierarchy with the View/Push and View/Pop commands.
PowerLogic User's Guide
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