User Guide

Table Of Contents

SpecifyingtheDesignRules

All the parameters relevant to the board and its manufacture are speci

fied in the Design Rules. Use the menu Edit/Design Rules.. or the DRC

command to open the Design Rules window. Opening the window with

the DRC command allows to start the Design Rule Check with the

Check button after setting the parameters. The layout can be checked at

anytime.

Thefollowingwindowappearswhen DRC hasbeencalled:

DRC:AdjustingtheDesignRules

GeneralPrinciples

The first time that you call the DRC, the Design Rules are provided by

the program. If necessary, adjust the values to suit your requirements.

When you have finished the adjustments, start the error check by click

ing on OK. This will result in the Design Rules being stored in the lay

outfileitself.

By clicking on Select you specify the region of the layout that is to be

examined. Simply drag a rectangle over the desired region with the

mouse.Theerrorcheckwillthenautomaticallystart.

Only signal layers visible before the Design Rule Check has been started

areexamined(DISPLAY).

The Apply button stores the values that are currently set in the layout

file. This means that the values that have so far been chosen are not lost

if you do not immediately start the error check and if you want to leave

theDRCdialogviathe Cancel button.

Changes to various Design Rules are immediately displayed in the Lay

outEditorafterclickingon Apply.

EAGLEManual