
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Design a counter circuit that has 2 inputs X and Y, and one output Z by using “one-hotstate” encoding. Don’t draw the circuit diagram.
When X=1, the circuit counts up or down based on the value of Y; when X=0, the circuit
remains in its previous state regardless of the value of Y. When Y=1, the circuit changes states
upwards in the order given below and continues this way in a loop. When Y=0, the circuit
changes states downwards in reverse order and continues this way in a loop. When the circuit
counts upwards, the Z output is 1.
The count order:
0, 1, 3, 2
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