General description: When using a Pullup or Pulldown component in an Orcad Schematic design, running DRC check will issue an error similar to the following:
ERROR [DRC0004] Possible pin type conflict XR1, O Output Connected to Output: Schematic page1 (0.40, 0.86)
This is caused because PULLUP and PULLDOWN components have only one pin of type output. This pin connects to the output of an IPAD or the output of an OBUFx. This error message can be safely ignored. Orcad will create a correct netlist that will implement correctly in the Xilinx tool set.