What does it mean that a counter is synchronous or asynchronous?

[haif]

whate i mean when i called this counter is synchronus or asynchronus

 

[santoshl]

help me

Hey, its simple.
If your counter becomes ZERO as soon as your reset is enabled, then it is independent of clock and Hence its called ASYNCHROUS counter.
If your counter is cleared only after active edge of colck even reset is enabled, then it is called SYNCHROUS counter

In a similar fashion SET i/p also.


Hope it helped to make things better

 

[lordsathish]

Re: help me

to be simple in synchronous all flip-flops have the same clock signal whereas in asynchronous it is not so...