User Guide

Autoroutersetup: Restartinganinterruptedjob
Do not at first make any changes to the parameters if you want to re
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start an interrupted routing job. Use the Continue existing job check box
to decide whether you want to continue with an existing job, or whether
youwanttochoosenewsettingsfortheremainingsignals.
Endjob endstheautoroutingjobandloadsthepreviousroutingresult.
7.8 RoutingMulti-LayerBoards
Therearetwodifferentwaysofimplementing supplylayers.
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Supplylayerswitha $-signatthestartofthelayername
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Supplylayerswithpolygons
SupplyLayers
The definition of supply layers has already been described in the previ
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oussectionunder PowerSupplyLayerswithOneSignal onpage 105.
Thefollowingpointsmustbeconsideredwhenautorouting:
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Thelayernamespecifiesthesignalthatiscarriedbythislayer.The
layer$VCC,forexample,onlycarriestheVCCsignal.
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Thelayerisrepresentedwithaninversedisplay.
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Thelayerisnotactiveduringautorouting(setting N/A intheAu
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toroutersetup, General tab).
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Afterrouting,anisolationlayerisdrawnaroundthelayoutusing
WIRE.Thispreventsshort-circuitsattheedgeoftheboard.
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Noothersignalsorpolygonsmaybedrawn!
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EAGLEManual