Layout Work Flow
•Open a new board file in Allegro layout. Add board outline to it.
Set design path, i.e... Pad path & psm path appropriately.
•To create module for low level schematics, Import net list from it using,
File > Import > Logic
•Select the logic path in such a way that it should point required low level schematic packaged folder. Click > OK
•Then you can find the message stating successful importing of net list.
•Place all the components, route it, finish 100% routing & clear all DRC’s.Now you can create the module for this.
•To create module, Go to Tools > Create module .Then select All On from Find tab left side. Also ON all layers used.
•Click the cursor on the left top corner of the layout portion & drag the cursor to the bottom right corner & leave the cursor such that entire layout portion is selected. Temp group may also use for the selection.
•After selection is done, click in the centre of the module, then a dialog box will open asking to save the created module. Save the created module by giving the proper path and same name as the respective hierarchy block name in top level schematics as sub_ckt.
•Created module is saved in selected path with .mdd extension.
•In the same way create all the modules required for design reuse by importing the respective logic of the low level schematics. Hence for each low level schematic respective module is prepared & all modules have to be saved in same path as that of the first module created.