Timing problems, Help

Jose. As Rysc is trying to indicate, you need to provide more information about the design. Did you synthesize and fit each of the blocks seperately to get the fmax results you're indicating? Where are you getting your numbers from?

Again, as Rysc has indicated, the overall fmax of the system depends not only on the fmax of the slowest block but how the blocks are connected together.

What you need to do is focus on the combined system rather than the individual blocks. Look at the top failing paths for the system to determine what is failing. Why they are failing will probably be immediately obvious.

Jake