Lab 8

Assigned : 04/04 (CS2511.001)                  04/06 (CS2511.002)

Due : 04/11 (CS2511.001)           04/13(CS2511.002)

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Objectives

• Design up-down counter using flip-flops
• Test your design using Logicworks.

Resources

Units 11 and 12 from the textbook.
Contact the TA if you have any questions.

Problem Description (total 40 pts)

Design an up-down counter which counts in the following sequence (C B A): 000, 100, 001, 111, 110, 101, (repeat) 000, ..., when the control bit U=1, and counts the reverse sequence when the control bit U=0. Use clocked D flip-flops and  AND, OR, NOT gates to implement it. You should write down Excitation Table, State Table, State Graph, K-Map and its simplified Boolean equation (MSOPs) for each remapped flip-flop input, draw the circuit (using virtual connection) and print it out, and verify the circuit in Logicworks.

Hand-in Requirements (Deliverables)

Staple all your hand-ins as required in problem description to form a single packet. Write your name, course and  recitation section number on the front.