Asynchronous Counter: Why Up Counts from 1?

[jonbrutal]

Hi everyone

I built a 4 bit asynchronous counter:
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, the sequence is
1,2,3,4 right up to F and then 0,1,2,3...

My question is why doesn't the up counter start with 0...can someone explain it to me.Is this the correct sequence for a asynchrbous up counter.

Thank you & regards

http://img257.imagevenue.com/img.php?loc=loc211&image=64901_1253864766223_122_211lo.jpeg

 

[Kenneth Mann]

Your drawing is toot small to make out.

KM