I am stuck and I can't figure out this circuit

could anyone please help me by finding the truth table, State Diagram, and Timing Diagram for the pictured circuit in the attachment section?

 

Have you attempted the truth table yourself?

I'd suggest you start there, instead of asking others for help. Why should I help you when all you've done is take a picture?

 

well I did make a truth table my self, and I also made k-maps and such but I'm not sure if they are correct, thus the reason for my post. Here I will include all of my work so that maybe you all can feel better about helping me.

Up-Counter Circuit Truth Table:

X​

A​

B​

C​

D​

Q1​

Q0​

0
0
0
0
1
0
0
0
0
1
1
0
0
1
0
1
0
1
1
1
0
0
1
1
0
0
1
1

Down-Counter Circuit Truth Table:

X​

A​

B​

C​

D​

Q1​

Q0​

1
0
0
1
1
0
0
1
0
1
0
0
0
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1

Inputs and Outputs:

Pre’
Clr’
D
clk
Q
Q’
0
1
X
X
1
0
1
0
X
X
0
1
0
0
X
X
1(rising edge)
1 (rising edge)
1
1
1
é
1
0
1
1
0
é
0
1
1
1
x
0
Q0
Q0’

also I don't want any snide comments or just plain trollism so if thats your style, take it to some liberal arts forum cause I don't appreciate it. Thanks

 

I can't make heads or tails of your "tables". Check out the forum FAQ on BB Code, particularly the table tag:

http://forum.allaboutcircuits.com/misc.php?do=bbcode#table

If you don't want to be criticized for not following the forum guidelines for requesting help, then perhaps you might consider following the forum guidelines for requesting help.

http://forum.allaboutcircuits.com/showthread.php?t=3002

 

ok my fault,I need to learn how to insert tables. More to come