User Guide

Chapter 7 Creating and Editing Hierarchical Designs
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Creating and Editing Hierarchical
Blocks
A hierarchical block represents a collection of circuitry in
the form of one or more lower-level schematics. The block
displays on a schematic as a rectangle with a variable
number of input and output ports.
You can place one or more instances of a hierarchical
block on a schematic. After you place a block, you can
stretch it, reshape it and move it. You can create a
schematic to be represented by the block or associate an
existing schematic with the block.
Wires and buses that end at any of the edges of the block
automatically connect to the block. Pins are created where
these connections occur. A default pin name appears
within the block; this pin name can be changed.
Creating a hierarchical block
1 Click the Draw Block button to change the pointer to a
rectangle representing the block.
2 Move the block to the desired location and click to
place it.
3 Right-click to stop placing blocks.
The block is assigned a reference designator of HBn
(where n is a sequential number beginning with 1). You
can change the reference designator of the block.