Click OK and this will create a new, blank IC window called adder1.
2.2 Click Back in the Floorplan palette and click Place & Route in the IC Palettes palette. In the Place & Route palette, click StdCel under the Autoplc item. Leave the default options set in the dialog box that comes up and click OK. Next, click Ports under the Autoplc item. Leave the defaults checked in the dialog box that pops up and click OK. The result should be an adder1 window that looks like this one:
2.3 From the Place & Route palette select All under the Autorou item. Click Options in the Autoroute All dialog box that comes up. In the Autoroute All Options dialog box, click Expert options. Select Channel Over Cell Routing and click OK in the Router Expert Options dialog box that comes up. Click OCR options back in the Autoroute All Options dialog box and set the step size to .5 and the Operation Mode Type to Center Weighted and click OK in the OCR options dialog box. Finally, click OK in the Autoroute All Options dialog box and the Autoroute All dialog box to begin routing. Depending on the size of the design this may take several minutes. When the process has completed the mouse pointer changes back from an hourglass to an arrow and the results of the process are in the transcript. The result should be an adder1 window that looks like the one below:
This small design will route completely the first time. However, for large designs, some un-routed overflows may still exist. These overflows must be routed as described below:
This step is necessary even if overflows don't immediately appear in the routed layout. When zoomed out small overflows may not be viewable, but may still exist. To select all overflows in the design type "check over". In the form window that appears select All and OK the form. Next, from the Place & Route palette select Overflw. If the response "An object of type Overflow must be selected" appears in the status block, there are no overflows to route. Otherwise, the overflows will be routed.
2.4 Save the layout by selecting File->Cell->Save Cell->Current Context. You may save the layout and exit the ICStation session at any time. To re-load the layout later, choose open from the IC station palette. If you wish to make changes to the cell, you must also selectFile->Cell->Reserve Cell->Current Context.