LCA2NCD Files

The input files that LCA2NCD requires and the output files that LCA2NCD generates are described below.

Input Files

Input to LCA2NCD consists of a Xilinx LCA file. This is a mapped design file generated in a previous revision of the Xilinx Development System. The file may also contain placement and routing information.

Output Files

Output from LCA2NCD consists of the following files.

• NCD file - a physical description of the design in terms of Xilinx components (logic cells, I/O cells, etc.).
  
  
• MDF file - MAP Directive File, a file describing how logic was decomposed when the design was originally mapped. The MDF file is used for guided mapping using the current Xilinx Development System software. In guided mapping, the file enables MAP to recreate the decompositions chosen when the design was first mapped. This file is only created if there are Mapper directives in the LCA file.
  
  
• L2N file - a report file containing information about the LCA2NCD run.