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AR# 40848

12.4 IOBUFDS/IOBUF simulation in ISIM is not correct when mixed language design is used


Simulation of IOBUFDS or IOBUF with ISIM returns incorrect results.

I am trying to run behavioral simulation with the XAPP867 design.


This is due to ISIM having issues with mixed language designs.

The workaround for the XAPP867 design is to replace the Unisim model with the Verilog model of the same component.
AR# 40848
Date Created 02/23/2011
Last Updated 10/24/2014
Status Active
Type Known Issues
  • ISE Design Suite - 12.4