[TimeQuest] Some asynchronous signals detected as clocks

Hi,

this often occures when you trigger a process with such signals. For example:

if (rising_edge(signal_load)) then
    {do something}
end if;

In this case quartus will always recognize "signal_load" as a clock because rising_edge is only meant to use clocks.

Check your design for edge detection on this signals and try to avoid the edge detection on asynchronous signals. For Example like this:

if (rising_edge(clock)) then
    signal_load_old <= signal_load;
    if ((signal_load_old = '0') and (signal_load = '1')) then
        {do something}
    end if;
end if;

This is only one method to catch the edges of a signal. There are sure some others (perhaps better).