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Schematic Driven Layout

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Schematic Driven Layout: Introduction

open cell libraryFrom the LayoutEditor a schematic window can be opened (Menu/Uitilities/Netlist Tool/Schematic or from the toolbar). Within the new window you can enter or import a schematics. The schematic window is strongly linked with the layout window. The schematic is syncron with the selected cell. Change/rename a cell/schematic sheet will also change rename the sheet/cell in the other window. For each device in the schematic window a cell with the layout of the device will be created. Clicking on a device will hightlight the cell/device in the layout, if it exists. If not, the place device mode will be activated. The routing of node works in a similar way.

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Managing Components

device manager Requirement for these feature is a component/device library which contains all information (symbol, layout, netlist, ..). Some library (like Open Cell Library) are included in the LayoutEditor. Further libraries can easiely be created. The libraries are ASCII file which can be ether edited by a text editor or can be modified via the component manager. Before placing or importing a schematic all required components had to be created. Information from some other libraies formats can be imported by the component manager.

Setting up the Technology/Layers

layer setupFor routing a schematic some information on the connecting layers are required. Enter all connecting layers and associated via layers to the technology list and sort them in the correct order. setup layerThe setup display on the right will represent a technology as displayed on the left. The lowest display layer is the "poly" layer followed by the "Cont_poly" layer and so on. The library and technology setup will be saved on program exit and restored on program start. Also the setup can be saved via the Generate Technology Macro function.

Netlist Export

The schematic can also be used to create netlist in any format you define. Within the component manager you can define unlimited different netlistinformation for any device. The information is splitted into the pure netlist information which is listed one for each fomart and a model information which is listed once for each device type. Exporting the netlist is done via the save as feature in the schematic. The netlist body is defined in the setup dialog of the LayoutEditor.