Specifications

8 Chapter 2—Schematic Editing
memory in your computer and increasing the memory allocated to the
program will increase the size of the designs you can work with.
 A number of user-selectable parameters are stored with the design and
affect the entire design when changed. These include:
 Attribute and pin number text style settings
 Display options, such as crosshairs and printed page breaks
 Printer page setup.
What is a Circuit?
In LogicWorks, the term “circuit” refers to a single circuit page, as dis-
played in a single window.
 Each master circuit or subcircuit consists of one page.
 Each circuit is viewed in a separate circuit window, and any number of
circuits or subcircuits can be displayed on the screen simultaneously.
 A circuit page is drawn on the screen as if it were a single piece of
paper, although it may have to be broken up into a number of
individual sheets of paper for printing or plotting.
 If the circuit is a subcircuit, then logical connections to the parent
device symbol are made using the Port Connector device. Port
connectors in the subcircuit are matched by name with pins on the
parent device.
 See more information on subcircuits and port connectors in Chapter 6,
Advanced Schematic Editing.
Types of Objects in a Circuit
A LogicWorks circuit is made up of three types of entities: devices, signals,
and text objects.
 A device is an object having a symbol, signal connection points called
“pins,” and optional attributes, internal circuit, and simulation
information. A device in LogicWorks can correspond to a physical
device in a circuit, or it can be a pseudo-device, such as a Ground
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