Chapter 3: Project Structures and the PCB Editor Tool Set
This chapter explains what you did when making the simple design in Chapter 2 and why. It also introduces and describes the PCB Editor tool set in greater detail, so that you will be wellequipped to lay out more complicated boards in the PCB Design Examples in Chapter 9.
PROJECT SETUP AND SCHEMATIC ENTRY DETAILS
Capture Projects Explained
When you set up your project by following the File ? New ? Project menu path, you had five options from which to choose: a project, a design, a library, a VHDL file, or a Text file. The options we are most interested in are projects and libraries, and we look at those in great detail throughout the book. VHDL files are used in field programmable gate array projects and are not discussed here. A Text file is simply a text file (for making project notes, for example).
After you selected the New Project option to begin setting up your project, four more options were available to you in the New Project dialog box: Analog or Mixed-Signal A/D, PC Board Wizard, Programmable Logic Wizard, or Schematic. A flow diagram of these options and suboptions is shown in Figure 3-1 (see also Figure 2-2). Analog or Mixed-Signal A/D is used to simulate analog and/or digital circuits using PSpice. PSpice is used to develop and test models (Chapter 7), perform circuit simulations (Chapter 7 and the PCB Design Examples), and simulate transmission lines (PCB Design Examples). For...