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<li class="toctree-l1"><a class="reference internal" href="../UsersGuide/index.html">Coriolis User’s Guide</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/LicenseCredits.html">Credits & License</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/Releases.html">Release Notes</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-1-0-1475">Release 1.0.1475</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-1-0-1963">Release 1.0.1963</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-1-0-2049">Release 1.0.2049</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-v2-0-1">Release v2.0.1</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-v2-1">Release v2.1</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Releases.html#release-v2-2"><strong>Release v2.2</strong></a></li>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/Installation.html">Installation</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Installation.html#building-coriolis">Building Coriolis</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/Installation.html#additionnal-requirement-under-macos">Additionnal Requirement under <span class="sc">MacOS</span></a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Installation.html#packaging-coriolis">Packaging Coriolis</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Installation.html#hooking-up-into-alliance">Hooking up into <span class="sc">Alliance</span></a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Installation.html#setting-up-the-environment-coriolisenv-py">Setting up the Environment (coriolisEnv.py)</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/Configuration.html">Coriolis Configuration & Initialisation</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Configuration.html#general-software-architecture">General Software Architecture</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Configuration.html#first-stage-technology-selection">First Stage: Technology Selection</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Configuration.html#second-stage-technology-configuration-loading">Second Stage: Technology Configuration Loading</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Configuration.html#configuration-helpers">Configuration Helpers</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/Configuration.html#alliance-helper"><span class="sc">Alliance</span> Helper</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/Configuration.html#tools-configuration-helpers">Tools Configuration Helpers</a></li>
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</ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/Configuration.html#hacking-the-configuration-files">Hacking the Configuration Files</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/ViewerTools.html">CGT - The Graphical Interface</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/ViewerTools.html#viewer-tools">Viewer & Tools</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#stratus-netlist-capture"><span class="sc">Stratus</span> Netlist Capture</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-hurricane-data-base">The <span class="sc">Hurricane</span> Data-Base</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#synthetizing-and-loading-a-design">Synthetizing and loading a design</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#etesian-placer">Etesian – Placer</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#knik-global-router">Knik – Global Router</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#kite-detailed-router">Kite – Detailed Router</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#executing-python-scripts-in-cgt">Executing Python Scripts in Cgt</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#printing-snapshots">Printing & Snapshots</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#memento-of-shortcuts-in-graphic-mode">Memento of Shortcuts in Graphic Mode</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#cgt-command-line-options">Cgt Command Line Options</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#miscellaneous-settings">Miscellaneous Settings</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-controller">The Controller</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-look-tab">The Look Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-filter-tab">The Filter Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-layers-go-tab">The Layers&Go Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-netlist-tab">The Netlist Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-selection-tab">The Selection Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-inspector-tab">The Inspector Tab</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ViewerTools.html#the-settings-tab">The Settings Tab</a></li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html">Python Interface for <span class="sc">Hurricane</span> / <span class="sc">Coriolis</span></a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html#plugins">Plugins</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html#chip-placement">Chip Placement</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html#clock-tree">Clock Tree</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html#recursive-save-rsave">Recursive-Save (RSave)</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="../UsersGuide/ScriptsPlugins.html#a-simple-example-am2901">A Simple Example: AM2901</a></li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="../PythonTutorial/index.html">Hurricane+Python Tutorial</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/Introduction.html">1. Introduction</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Introduction.html#terminology">1.1 Terminology</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Introduction.html#generalities">1.2 Generalities</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Introduction.html#various-kinds-of-constructors">1.3 Various Kinds of Constructors</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/Environment.html">2. Setting up the Environment</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Environment.html#setting-up-the-pathes">2.1 Setting up the Pathes</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Environment.html#user-s-configurations-file">2.2 User’s Configurations File</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Environment.html#the-techno-py-file">2.2.1 The <span class="cb">techno.py</span> File</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Environment.html#the-settings-py-file">2.2.2 The <span class="cb">settings.py</span> File</a></li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html">3. Making a Standard Cell – Layout</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#the-allianceframework-crl-core">3.1 The AllianceFramework (CRL Core)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#session-mechanism-hurricane">3.2 Session Mechanism (Hurricane)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#creating-a-new-cell-crl-core">3.3 Creating a new Cell (CRL Core)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#the-dbu-measurement-unit">3.4 The DbU Measurement Unit</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#setting-up-the-abutment-box">3.5 Setting up the Abutment Box</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#adding-nets-and-components">3.6 Adding Nets and Components</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#getting-a-layer">3.6.1 Getting a Layer</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#creating-a-net">3.6.2 Creating a Net</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#id1">3.6.3 Creating a Component</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#saving-to-disk-crl-core">3.7 Saving to Disk (CRL Core)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CellNetComponent.html#the-complete-example-file">3.8 The Complete Example File</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/Collections.html">4. Manipulating Cells, Nets and Components</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Collections.html#hurricane-collections">4.1 Hurricane Collections</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Collections.html#restrictions-about-using-collections">4.1.1 Restrictions about using Collections</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Collections.html#loading-a-cell-with-allianceframework">4.2 Loading a Cell with AllianceFramework</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/CgtScript.html">5. Make a script runnable through <span class="cb">cgt</span></a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/CgtScript.html#using-breakpoints">5.1 Using Breakpoints</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/Netlist.html">6. Making a hierarchical Cell – Netlist</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Netlist.html#creating-an-instance">6.1 Creating an Instance</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Netlist.html#id1">6.2 Creating Nets and connecting to Instances</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Netlist.html#power-supplies-special-case">6.3 Power supplies special case</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Netlist.html#creating-the-physical-view-of-a-cell-netlist">6.4 Creating the physical view of a Cell netlist</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Netlist.html#id2">6.4.1 Transformation</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Netlist.html#placing-an-instance">6.4.2 Placing an Instance</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Netlist.html#nets-from-plugs-to-routingpads">6.4.3 Nets – From Plugs to RoutingPads</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../PythonTutorial/Netlist.html#nets-regular-wiring">6.4.4 Nets – Regular wiring</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/Netlist.html#the-complete-example-file">6.5 The Complete Example File</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/RealDesigns.html">7. Working in real mode</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/RealDesigns.html#loading-a-lef-file">7.1 Loading a <span class="sc">lef</span> file</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/RealDesigns.html#loading-a-blif-file-yosys">7.2 Loading a <span class="sc">blif</span> file – <span class="sc">Yosys</span></a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/ToolEngines.html">8. Tool Engines (CRL Core)</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/ToolEngines.html#placer-etesian">8.1 Placer – Etesian</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/ToolEngines.html#router-katana">8.1 Router – Katana</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/ToolEngines.html#a-complete-example">8.2 A Complete Example</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonTutorial/AdvancedTopics.html">9. Advanced Topics</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/AdvancedTopics.html#id1">9.1 Occurrence</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/AdvancedTopics.html#id2">9.2 RoutingPads</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/AdvancedTopics.html#hypernets">9.3 HyperNets</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonTutorial/AdvancedTopics.html#miscellaeous-trans-hierarchical-functions">9.4 Miscellaeous trans-hierarchical functions</a></li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="../Stratus/Stratus.html">Stratus Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../DpGen/DpGen.html">DpGen Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Patterns/Patterns.html">Patterns Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Hurricane/Hurricane.html">Hurricane Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Viewer/Viewer.html">Viewer Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../CrlCore/CrlCore.html">CRL Core Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Katabatic/Katabatic.html">Katabatic Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Kite/Kite.html">Kite Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../Unicorn/Unicorn.html">Unicorn Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../PythonCpp/index.html">Hurricane Python/C++ API Tutorial</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../PythonCpp/Introduction.html">1. Introduction</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonCpp/Introduction.html#first-a-disclaimer">1.1 First, A Disclaimer</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonCpp/Introduction.html#about-technical-choices">1.2 About Technical Choices</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonCpp/Introduction.html#botched-design">1.3 Botched Design</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonCpp/Configuration.html">2. Basic File Structure and CMake configuration</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonCpp/DBoStandalone.html">3. Case 1 - DBo Derived, Standalone</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../PythonCpp/DBoStandalone.html#class-associated-header-file">3.1 Class Associated Header File</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../PythonCpp/DBoStandalone.html#class-associated-file">3.2 Class Associated File</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../PythonCpp/DBoStandalone.html#head-of-the-file">3.2.1 Head of the file</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../PythonCpp/DbU.html">6. Encapsulating DbU</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../RDS/index.html">Symbolic to Real Conversion in Alliance</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../RDS/RDSpage.html#the-rds-file">The RDS File</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../RDS/RDSpage.html#the-mbk-to-rds-via-table">The <code class="docutils literal"><span class="pre">MBK_TO_RDS_VIA</span></code> table</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../RDS/RDSpage.html#the-mbk-to-rds-bigvia-hole-table">The <code class="docutils literal"><span class="pre">MBK_TO_RDS_BIGVIA_HOLE</span></code> table</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../RDS/RDSpage.html#the-mbk-to-rds-bigvia-metal-table">The <code class="docutils literal"><span class="pre">MBK_TO_RDS_BIGVIA_METAL</span></code> table</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../RDS/RDSpage.html#the-mbk-wiresetting-table">The <code class="docutils literal"><span class="pre">MBK_WIRESETTING</span></code> table</a></li>
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<li class="toctree-l3"><a class="reference internal" href="#callback-calling-order">Callback Calling Order</a></li>
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<div class="section" id="lef-api-reference">
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<h1>LEF API Reference<a class="headerlink" href="#lef-api-reference" title="Permalink to this headline">¶</a></h1>
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<p>The LEF API reference is copyrighted by <span class="sc">Cadence</span> (<a class="reference external" href="http://www.cadence.com">http://www.cadence.com</a>)
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under the <a class="reference external" href="http://www.apache.org/licences/LICENSE-2.0">Apache License, Version 2.0</a> and is available here:
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<a class="reference external" href="file:../../lefdef/lefapi/ch1Intro.html">LEF API</a></p>
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<div class="section" id="implementation-notes">
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<h2>Implementation Notes<a class="headerlink" href="#implementation-notes" title="Permalink to this headline">¶</a></h2>
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<div class="section" id="understanding-units">
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<h3>Understanding Units<a class="headerlink" href="#understanding-units" title="Permalink to this headline">¶</a></h3>
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<p>In the <code class="docutils literal"><span class="pre">UNITS</span></code> section, the statement:</p>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">DATABASE</span> <span class="n">MICRONS</span> <span class="n">LEFconvertFactor</span>
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</pre></div>
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</div>
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<p>Means that:</p>
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<ol class="arabic">
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<li><p class="first">The distances in the <span class="sc">lef</span> file are expresseds (always, it seems) in
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micrometers.</p>
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</li>
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<li><p class="first">The distances are multiples of <img class="math" src="../_images/math/e6bc812a13677a4608e3f0624c560af92a3d7887.png" alt="\frac{1}{LEFconvertFactor}"/> which is
|
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the smallest amount of distance we can represent. By default <code class="docutils literal"><span class="pre">LEFconvertFactor</span></code>
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is set to <code class="docutils literal"><span class="pre">100</span></code>, which means steps of <code class="docutils literal"><span class="pre">0.01µm</span></code>.</p>
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<p>This is the equivalent of the <strong>precision</strong> factor in the <span class="sc">Hurricane</span> database.</p>
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</li>
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</ol>
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<div class="section" id="callback-calling-order">
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<h3>Callback Calling Order<a class="headerlink" href="#callback-calling-order" title="Permalink to this headline">¶</a></h3>
|
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<p>The callback for the <code class="docutils literal"><span class="pre">PIN</span></code> section is called <em>before</em> the callback of the whole
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<code class="docutils literal"><span class="pre">MACRO</span></code> it belongs to.</p>
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<p>As a consequence, we have to create <code class="docutils literal"><span class="pre">Net</span></code> before the <code class="docutils literal"><span class="pre">Cell</span></code> can be known.
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To avoid transient storage of lots of informations while we are reading the
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<code class="docutils literal"><span class="pre">PIN</span></code>, when we encounter one <strong>and</strong> no temporary <code class="docutils literal"><span class="pre">Cell</span></code> exists, we
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create one named <code class="docutils literal"><span class="pre">"LEFImportTmpCell"</span></code>. This temporary <code class="docutils literal"><span class="pre">Cell</span></code> will be renamed
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and configured when the subsequent <code class="docutils literal"><span class="pre">MACRO</span></code> callback is called.</p>
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