i'm a bit confused

Hi!

i checked the equations with the quartus II simulator (Version 7.1) too. the simulations shows for both devices the same and correct function. but the reality isn't like the simulation.

the input signals were generated from an internal pll and two counters which were used to scale the counting frequency once more down.

how could i find out race conditions?? are there any usful tools to analyse some conditions the check situations like this??

i checked the control signals too. i think the development board would not be configurable and would not be able start after programming if an error of the control signal is present.

is there anybody who can check my phenomenon for a "real" system too??

thanks for your responses!!!