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tanner [2007/09/26 09:55]
tobi created
tanner [2007/09/26 10:03] (current)
tobi
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   * For DRC, try to draw your cells so they really DRC clean without being arrayed. Tanner's HiPer DRC doesn't understand that subcells DRC ok when arrayed and complains endlessly about cells with half contacts. Use the Icon/Abut layer (which you can define) to enable alignment of cells with layout sticking out of the abut bounding box.   * For DRC, try to draw your cells so they really DRC clean without being arrayed. Tanner's HiPer DRC doesn't understand that subcells DRC ok when arrayed and complains endlessly about cells with half contacts. Use the Icon/Abut layer (which you can define) to enable alignment of cells with layout sticking out of the abut bounding box.
   * Starting with Tanner 12.5, you can create or stretch arrays by drag-editing the corners or edges of an instance. The problem is that this makes it hard to use the handy snap-alignment tools to align your cells (e.g. pads). To avoid editing array sizes, use "Force Move" (map this to a keyboard shortcut).   * Starting with Tanner 12.5, you can create or stretch arrays by drag-editing the corners or edges of an instance. The problem is that this makes it hard to use the handy snap-alignment tools to align your cells (e.g. pads). To avoid editing array sizes, use "Force Move" (map this to a keyboard shortcut).
 +  * Be really careful about properly gridding your schematics, especially if they are migrated from earlier (prev version 12) of Tanner's S-Edit. Once your design goes "off-grid" you are in big trouble. S-Edit has a tool that computes the maximum possible grid, but this will be ridulously small if your have a mix of grids.
 +  * Schematics migrated from earlier S-Edit versions sometimes have little boxes drawn on the terminals of devices like FETS. These cause terrible off-grid hassles if they are rotated because they throw the pins off-grid. **Get rid of these left-over terminal boxes.**
 +  * We've had lots of trouble with dropped schematic connections. These seem be related to funny gridding in a design. **Don't let anyone on your design team go off grid!**
  
tanner.txt · Last modified: 2007/09/26 10:03 by tobi