tutorial10 - ERG2020 A&B Tutorial 10 Outline 1. 2. 3....

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ERG2020 A&B Tutorial 10 03-04-2007 Kai Caihong chkai6@ie.cuhk.edu.hk Outline 1. Analysis of state machine 2. Design of state machine 3. Counters
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Flip-Flop Characteristic Equations
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Example 1 DDPP Problem 7.18 Analyze the clocked synchronous state machine in figure shown below. Write excitation equations, transition equations, transition table, and state/output table (use state names A-D for Q1Q0 = 00 – 11). Draw a state diagram, and draw a timing diagram for CLK, EN, Q1, and Q0 for 10 clock tick, assuming that the machine starts in state 00 and EN is continuously 1.
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• Excitation equations • Output equations • Characteristic equations of J-K ffs 00 J KE N == 110 JK Q E N = = 01 MAX Q Q EN = •• *' ' QJ Q K Q =+
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• Transition equations *' ' 00 0 QE N Q E N Q = •+ ' 10 1 0 1 '' 01 1 () Q Q EN Q Q EN Q EN Q Q Q Q EN Q = •• + =
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• Transition table 00/1 11/0 1 1 01/0 10/0 1 0 11/0 01/0 0 1 10/0 00/0 0 0 EN=1 EN=0 0 Q 1 Q A/1 D/0 D B/0 C/0 C D/0 B/0 B C/0 A/0 A EN=1 EN=0 S
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• State diagram A D C B 0/0 0/0 0/0 1/0 1/1 1/0 1/0 0/0
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• A Mealy state machine
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This note was uploaded on 05/18/2010 for the course INFORMATIO IEG 2810AB taught by Professor Professork.w.cheung during the Spring '09 term at CUHK.

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tutorial10 - ERG2020 A&B Tutorial 10 Outline 1. 2. 3....

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