User manual CADENCE DESIGN SYSTEMS PSPICE SCHEMATIC

[. . . ] PSpice Schematics Schematic Capture Software User's Guide Copyright © 1985-2000 Cadence Design Systems, Inc. Trademarks Allegro, Ambit, BuildGates, Cadence, Cadence logo, Concept, Diva, Dracula, Gate Ensemble, NC Verilog, OpenBook online documentation library, Orcad, Orcad Capture, PSpice, SourceLink online customer support, SPECCTRA, Spectre, Vampire, Verifault-XL, Verilog, Verilog-XL, and Virtuoso are registered trademarks of Cadence Design Systems, Inc. Affirma, Assura, Cierto, Envisia, Mercury Plus, Quickturn, Radium, Silicon Ensemble, and SPECCTRAQuest are trademarks of Cadence Design Systems, Inc. Alanza is a service mark of Cadence Design Systems, Inc. [. . . ] The Stay-on-Grid command must be enabled for the Snap-to-Grid command to be effective. Enabling or disabling snap-to-grid 1 2 3 From the Options menu, select Display Options. Select or clear the Snap-to-Grid check box to enable or disable snap-to-grid. Click OK. Grid Spacing Grid Spacing defines the horizontal and vertical grid spacing on your drawing area. This corresponds to (and displays as) 0. 10 inches for US-standard page sizes, and 2. 5 millimeters for metric page sizes. The minimum grid spacing allowed is 0. 01 inch, or . 25 millimeters. Specifying grid spacing 1 2 3 From the Options menu, select Display Options. In the Grid Spacing text box, type the grid spacing value. Click OK. 163 Chapter 5 Using the Symbol Editor Gravity The gravity setting determines how close the pointer must be to an object for the object to be selected when you click the pointer. The default is . 03 inches (or . 75mm). Specifying gravity 1 Gravity is only functional when snap-to-pin is enabled. 2 3 From the Options menu, select Display Options. In the Gravity text box, type the snap-to-pin gravity value. Click OK. 164 Changing Grid and Gravity Text Grid Text Grid allows you to set the grid spacing for text separately from the normal grid spacing. The text grid is usually set to some smaller percentage of the regular drawing grid. This allows you to align text along smaller increments of the regular grid. Enabling text grid and specifying text grid size 1 2 From the Options menu, select Display Options. Select the Text Stay-on-Grid check box to enable the text grid. A check mark in the check box indicates that the text grid is ON. 3 4 Type the text grid spacing value in the Spacing text box. Click OK. 165 Chapter 5 Using the Symbol Editor Zooming and Panning The zoom and pan features in the symbol editor are the same as they are in the schematic editor. Refer to Zooming and Panning in Schematics on page 3-68. 166 Printing Symbols Printing Symbols Printing a symbol 1 From the File menu, select Print to display the Print dialog box. File Menu 2 To select the part or parts to be printed, do the following: a b c Select the Current Symbol Only check box to print the symbol being edited. Select one or more parts from the Parts list. Click Select All Parts to print all parts in the open library. 3 In the Content Options frame, select the check box to enable printing. The Content Options are described in Table 13. Select one of the Scaling options. · · 4 Auto-fit expands the symbol to full page size. [. . . ] Ports consist of three types: global, interface, and off-page (defined in this Appendix). A symbol that is an individual component for a specific netlister. That is, it is completely specified electrically for the purpose it is required to perform. An attribute used as a unique name on a given schematic level. [. . . ]