Counter Design 2

# Present state next state sr inputs d inputs jk inputs

• Notes
• 3

This preview shows 2 out of 3 pages.

Present State Next State SR inputs D inputs JK inputs T inputs x A B A + B + S A R A S B R B D A D B J A K A J B K B T A T B 0 0 0 0 1 0 0 1 1 0 0 1 0 1 1 0 1 1 0 0 1 0 0 0 1 1 0 1 1 1 1 1 0 0 0 1 1 1 1 0 Remember, the darker columns show the state transition and excitation information for flip-flop A, and the lighter columns show the same information for flip-flop B. The table is filled using the same excitation information as was used in the previous example. Here is that excitation information summarized: Q Q + S R D J K T 0 0 0 × 0 0 × 0 0 1 1 0 1 1 × 1 1 0 0 1 0 × 1 1 1 1 × 0 1 × 0 0 Based on this information, the correct excitation information can be inserted into the table for the proper set of transitions. (A A + , B B + ) Here is the state table filled in with that information: Present State Next State SR inputs D inputs JK inputs T inputs x A B A + B + S A R A S B R B D A D B J A K A J B K B T A T B 0 0 0 0 1 0 × 1 0 0 1 0 × 1 × 0 1 0 0 1 1 0 1 0 0 1 1 0 1 × × 1 1 1 0 1 0 1 1 × 0 1 0 1 1 × 0 1 × 0 1 0 1 1 0 0 0 1 0 1 0 0 × 1 × 1 1 1 1 0 0 0 1 0 × 1 0 0 1 0 × 1 × 0 1 1 0 1 1 1 1 0 × 0 1 1 1 × × 0 1 0 1 1 0 0 0 0 1 0 × 0 0 × 1 0 × 1 0 1 1 1 1 0 × 0 0 1 1 0 × 0 × 1 0 1

Subscribe to view the full document.

Step 4: Obtain the logic equations. With the excitation information complete, each input must now be mapped, so that a set of logic equation can be determined. With the exception of needing 3-variable Karnaugh maps instead of the 2-variable maps of the previous example, the process of obtaining the logic equations is the same as in the first example. Here are the maps for each set of equations.
You've reached the end of this preview.
• Summer '06
• JSThweatt
• present state, State A+ B+

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern