Schematic Design Elements

You can use any schematic to generate a layout with Layout XL. However, the process is easier if you:

• Place symbols of devices and pins in the schematic approximately where you want them to be in the layout.
  The Place As In Schematic command lets you place generated layout devices and pins in positions that correspond to the positions of their schematic symbols. If your design carries any unbound instances and pins, these are positioned below the PR boundary.
• Use consistent parameter defaults for comparable symbols.
  Layout XL applies the parameters of the symbols to the layout devices.
  
  Layout XL does not pass to the layout instance CDF parameters that are not evaluated (i.e., that are not AEL expressions) and have cdfParamRec~>storeDefault=nil. These are master parameters and are expected to match for both schematic and layout master. If you require these parameters to be passed, set cdfParamRec->storeDefault to t for the schematic master parameters.

When transferring information from the schematic to the layout, Layout XL flattens the schematic (i.e., expands schematic symbols into corresponding devices) if you provide an lxViewList or an lxStopList to tell Layout XL which view of the lower-level instances to use.

Layout XL also supports:

• Design variables.
• One-to-many mapping.
• Many-to-many and many-to-one binding.

If you are preparing a hierarchical design, you also need to make sure the symbol view of each top-level design element is mapped to the correct layout view of the corresponding layout element for generating the layout.

Related Topics

lxViewList Property

lxStopList Property

Design Variables

One-to-Many Mapping of Instance or Pin