Specifications

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3
Advanced Schematic
Editing
This chapter provides information on the more advanced schematic editing
features of LogicWorks.
Bussing
The bussing facility allows any combination of named signals to be repre-
sented by a single line and any subset of these to be brought out through a
“breakout” at any point along the bus line.
Properties of Busses
A bus is treated by LogicWorks as a signal with special properties. Thus,
bus lines can be drawn and modified on the screen using all the same edit-
ing features available for signals. Note the following properties of busses:
 Only bus pins on devices can be connected directly to a bus. All other
connections must be made by using a breakout to access the desired
internal signals. A breakout is created using the New Breakout
command in the Schematic menu.
 You do not need to specify in advance what signals will be contained
in a given bus. Any signals that are present in a breakout or bus pin
attached to a bus will become part of that bus and can be brought out
through another breakout anywhere along the bus.
 Any two busses can be joined together, regardless of their internal
signals. When two different busses are merged, any signal in either bus
becomes available anywhere along the combined bus.
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