User Guide

Table Of Contents
The drill holes are placed, with the desired diameter, on the package us
-
ing the HOLE command. The drilling diameter can be retrospectively
changedwithCHANGEDRILL.
The forbidden area for the Autorouter is defined in layer 42, bRestrict,
using the CIRCLE command. For reasons of representational clarity
the circle is shown here with a non-zero width. Circles whose width is 0
are filled. In this case it has no effect on the Autorouter, since it may not
route within the circle in either case. These forbidden areas are also
takenintoaccountbyapolygoninlayer16, Bottom.
8.8 DrawingFrames
It may be true that drawing frames are not components, but they can be
defined for schematics as devices with neither packages nor pins. Such
devices in EAGLE’s frames library contain a symbol consisting merely
of a frame of the appropriate size, and a documentation field, which is
alsodefinedasasymbol.
In both cases the identification point is located at the bottom left, so
that neither the frame nor the documentation field will be unintention
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allyselectedwhileworkingwithinthedrawingarea.
Textvariablesinthedocumentationfield
The text variables >DRAWING_NAME, >LAST_DATE_TIME and
>SHEET are contained, as well as some fixed text. The drawing’s file
name, date and time of the last change appear at these points together
withthesheetnumberintheschematic(e.g., 2/3 =sheet2of3).
In addition, the variable >PLOT_DATE_TIME is available. It contains
thedateandtimeofthelastprintout.
All of these text variables can be placed on the schematic, and (with the
exceptionof >SHEET)ontheboard.
The frame is defined in the device with addlevel Next, and the documen
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tation field with addlevel Must. This means that the documentation field
cannotbedeletedaslongastheframeispresent.
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EAGLEManual