Unformatted text preview: University of Florida
EEL 3701-Summer 2019
Dr. Eric. M. Schwartz
Department of Electrical & Computer Engineering
Tues, 2 July 2019
Restost Not included in It Last Name , First Name
[17%] 8. Design a system that "counts" as shown, using the minimum number of flip-
flops necessary. The system must asynchronously go to state "0" when
Restart (active-low) goes true. Use a T-FF for the most significant bit of
your design, a JK-FF for the least significant bit, and D-FF(s) for any other
bits that you think are necessary. Note that the third state has 6 outputs,
corresponding to the octal number 378 = 011 1112; therefore this state
machine has six outputs: Ys, Y4, ..., Yo. These outputs must be active-low.
Note: All the given FFs have asynchronous clear and set inputs as shown.
a) Draw a functional block diagram (showing all the inputs, all the outputs,
and the functional blocks). Put your design in the dashed box with the inputs
and outputs going into or out of the box, on the left or right, respectively.
This is not a circuit diagram.
i Resant ( L )
T (H )
i CLK ( H )
Q - Q.
ya (L )
X3 - 43 (1 )
- Y2LL )
Restor (1 )
yo LL )
b) Complete the next-state truth table (in counting order).
Jo Ku X X / 3
0 0 0
B of 11...
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