Re: help me
Ok junior
1) edges .. edges of signals are important in edge triggered devices .. which now are the standard . it means that an edge trigguered device will change its status at the transition moment . from 0 to 1 for positive edge devices and from 1 to 0 for negative devices .. This arrangement is the best .because the device or flip flop will remain stable when there are no transitions ..
2) combinational and sequential logic ,,is logic that we are talking about . are two different types of logic .one changes the output immediatly and it only dependends on how fast the electrons can move from the input .. that's combinatorial .. there is no notion of clock .. The other logic has a synchronizing signal called the clock ..
and the outputs only change when the clock says it to do so. This is much more stable because with the combinatorial logic you have electron "races" between wires whoever arrives first will change the output .. you don't want that .
So you use sequential logic with a clock .This allows the signals to propagate at the output .. and then the clock gives the GREEN light to the new output.
3) applications of flip flops ..
counters , state machines .. registers ..