Web_Answers_13 - Unit 13 Problem Solutions 13.2 Notice that...

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Unit 13 Problem Solutions Z depends on the input X , so this is a Mealy machine. Because there are more than 2 state variables, we cannot put the state table in Karnaugh Map order (i.e. 00, 01, 11, 10), but we can still read the next state and output from the Karnaugh map. For example, when the input is X = 1 and the state is Q 1 Q 2 Q 3 = 110, we can read the next state and output from the XQ 1 Q 2 Q 3 = 1110 position in the Karnaugh maps for Q 1 + , Q 2 + , Q 2 + , and Z . So in this case, the next state is Q 1 + Q 2 + Q 3 + = 101 and the output is Z = 0. The entire table can be derived from the Karnaugh maps in this manner. Note : We can also ±ll in the state table directly from the equations, without using Karnaugh maps. See FLD p. 653 for the state table and state graph. Notice that this is a shift register. At each falling clock edge, Q 3 takes on the value Q 2 had right before the clock edge, Q 2 takes on the value Q 1 had right before the clock edge, and Q 1 takes on the value

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This note was uploaded on 09/03/2008 for the course EE 316 taught by Professor Brown during the Fall '08 term at University of Texas.

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Web_Answers_13 - Unit 13 Problem Solutions 13.2 Notice that...

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