AR# 10661: 3.3i Foundation ISE Project Importer - Incorrect handling of BUFG on schematic source files
3.3i Foundation ISE Project Importer - Incorrect handling of BUFG on schematic source files
Keywords: ISE, Project Importer, Aldec
General Description: Synopsys will not insert pads in front of BUFG symbols for 4K-derived devices. As a result, 4K families will error out in MAP.
For 4K, Spartan, or Spartan XL designs, modify the schematic by inserting an IBUF between the IPAD and the BUFG. This will allow the implementation tools to complete. However, the dedicated clock path will not be used, and timing could be affected.