hi,
my question is like that design a counter circuit with a control input ( in addition to the clock input ) that counts odd numbers when the control input is high and counts even numbers when the control input is low.

i have the state tables and k-maps, but i couldn't design the circuit. i'm hopeless, i have to send my report till 4 pm..

 

Say you have a 4 bit binary number.

Consider what bit in the 4-bit number is the same for all odd numbers and what bit in the 4-bit number is the same for all even numbers.

hgmjr

 

3-bit 000 to 111

 

Which bit determines odd/even? Spot this and you should be able to get started.

 

If you understand state tables and K-maps, it should be straightforward to accomplish this task.

I wrote a bit about how to do a FSM in this post

http://forum.allaboutcircuits.com/showthread.php?t=4009

Steve

 

Which bit determines odd/even? Spot this and you should be able to get started.

when the control input is high (1) the circiut counts odd numbers,when the control input is low (0) the circuit counts even numbers.

i designed before an odd number counter. Inout is provided by the clock. but here the control input is bothering me

 

FSM stands for Finite State Machine in scubasteve_911's reply.

hgmjr