第四章验证多路复用器版图——Verifying the Multiplexer LayoutThis chapter introduces you to interactive verification. You will perform two different tests in the Virtuoso® layout editor while using Diva interactive verification. One test uses the Design Rule Checker (DRC) to compare your design against the design rule, and the other test uses Layout Versus Schematic (LVS) software to check your design’s connectivity. You will be 本章向您介绍交互式验证。
在使用Diva交互式验证时，您将在Virtuoso®版图编辑器中执行两个不同的测试。
一个测试使用设计规则检查器（DRC）将您的设计与设计规则进行比较，另一个测试使用Layout Versus Schematic（LVS）软件来检查您的设计的连通性。
你将会Creating a Test Case for Checking Errors 创建用于检查错误的测试用例⏹Performing a Design Rule Check 执行设计规则检查⏹Extracting Connectivity from the Layout 从版图中提取连接性⏹Comparing the Layout to the Schematic 将版图与原理图进行比较⏹Analyzing LVS Errors 分析LVS错误⏹Correcting the Error 更正错误⏹Rerunning Verification on page 重新验证When you finish this chapter, you will be able to 完成本章后，您将能够⏹Run a design rule check and view errors 运行设计规则检查并查看错误⏹View and correct DRC errors 查看并更正DRC错误⏹Run extraction on a layout 在版图上运行提取⏹View a schematic 查看原理图⏹Cross-probe between a layout and a schematic 版图和原理图间的交叉探测⏹Rerun verification after correcting an error 纠正错误后重新运行验证找出是否可以运行交互式验证——Finding Out if You Can Run Interactive Verification You might not have a license to run the interactive verification products.您可能没有运行交互式验证产品的许可。
➤Click the Verify menu to find out whether you can use interactive verification.➤单击“验证”菜单以确定是否可以使用交互式验证。
If the commands under Verify appear shaded, you do not have a license to run interactive verification. You can either read this chapter to get an idea about how interactive verification works, or you can go on to the next chapter.如果“验证”下的命令显示为阴影，则表示您没有运行交互式验证的许可证。
您可以阅读本章以了解交互式验证的工作原理，也可以继续阅读下一章。
如果您还没有完成以前的章节——If You Have Not Completed the Previous ChaptersThis chapter assumes you have followed the steps in the previous chapters. If you have, you can skip this section and go to the “Creating a Test Case for Checking Errors” on page 107. If you did not follow the steps in the previous chapters, you must copy a completed design from the master library so you can go through this chapter. The following steps show you how to copy the completed design from the master library.本章假设您已按照前面章节中的步骤进行操作。
如果有，可以跳过本节并转至第107页的“创建检查错误的测试用例”。
如果未按照前面章节中的步骤进行操作，则必须从master 库中复制已完成的设计，以便可以完成这一章。
以下步骤说明如何从master库复制完成的设计。
It is possible to run out of resources, such as memory, if you run multiple layout editors. Before you start the software, you need to check whether the software is already running.如果运行多个版图编辑器，则可能会耗尽资源（如内存）。
在启动软件之前，您需要检查软件是否已在运行。
1. Type the following in an xterm window to check whether the layout editor is already running:1.在xterm窗口中键入以下内容以检查版图编辑器是否已在运行：ps auxw | grep layout2. If the layout editor is running, choose File – Exit in the Command Interpreter Window (CIW)to exit the software.2. 如果版图编辑器正在运行，请在命令解释器窗口（CIW）中选择文件- 退出以退出软件。
3. Type the following in an xterm window to start the layout editor:3. 在xterm窗口中键入以下内容以启动布局编辑器：cd ~/cell_designlayoutPlus &4. Choose File – Open. 4. 选择文件- 打开。
The Open File form appears. 出现“打开文件”表单。
5. Type the library, cell, and view names as follows: 键入库，单元和视图名称，如下所示：Library Name masterCell Name mux2View Name layout6. Click OK.The mux2 cell from the master library opens. master库中的mux2单元打开。
7. In the cellview window, choose Design – Save As. 在cellview窗口中，选择Design–Save AsThe Save As form appears. 出现“另存为”表单。
8. In the Save As form, type the library and cell names as follows:8. 在“另存为”窗体中，键入库和单元名称，如下所示：Library Name tutorialCell Name mux29. Click OK.The mux2 cell is copied to the tutorial library. 将mux2单元格复制到教程库中。
10. In the mux2 cellview, choose Window – Close to close the cellview.10. 在mux2 cellview中，选择Window – Close以关闭cellview。
11. In the CIW, choose Open – File to open the mux2 layout you just saved.11. 在CIW中，选择Open – File以打开刚刚保存的mux2版图。
12. Type the library, cell, and view names as follows:键入库，单元和视图名称，如下所示：Library Name tutorialCell Name mux2View Name layout13. Click OK.The mux2 cell from the tutorial library opens. 将打开教程库中的mux2单元。
Note: Another way to open a cellview is with the Open command. Using Open replaces the current window with the new window. To use the Open command, choose Design – Open. The Open File form appears. Set the library, cell, and view names to the cellview you want to open, and click OK. The current cellview is replaced with the new cellview.注意：打开cellview的另一种方法是使用Open命令。
使用Open用新窗口替换当前窗口。