1. SYEN Digital Systems
Chapter 6 – Part 3
SYEN 3330 Digital Systems

2. Overview of Chapter 6 Types of Sequential Circuits Storage Elements
Latches
Flip-Flops
Sequential Circuit Analysis
State Tables
State Diagrams
Sequential Circuit Design
Specification
Assignment of State Codes
Implementation
HDL Representation
SYEN 3330 Digital Systems

3. Sequential Circuit Analysis
Inputs
Combina-tional
Logic
Outputs
Storage Elements
State
Next
State
CLK
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4. Example (from Fig. 6-17)
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5. Example (Fig. 6-17) (Continued)
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6. Example (Fig. 6-17) (Continued)
Where in time are inputs, outputs and states defined? 1 1 1
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7. Example (Fig. 6-17) (Continued)
Where in time are inputs, outputs and states defined? 1 1 1
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8. State Table Characteristics
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9. Example: State Table (Fig. 6-17)
The STATE TABLE can be filled in using the next state and output equations 
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10. Alternate State Table Format
An alternate format just shows the next state and output as a function of the current state, but broken out by input.
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11. State Table Characteristics
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12. State Diagrams
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13. State Diagram (Example)
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14. Flip-Flop Input Functions
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15. Analysis with Other Flip-Flops
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16. Characteristic Tables (Review 6-7)
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17. JK Flip-Flop Circuit Analysis
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18. JK Flip-Flop Analysis (Cont.)
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19. JK Flip-Flop, Next State
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20. JK Flip-Flop, Next State
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21. Review: Sequential Circuits
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22. Moore and Mealy Models
Sequential Logic, or Sequential Machines are also called Finite State Automata. Two formal models exist:
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23. Moore and Mealy Example
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24. Moore and Mealy Example Tables
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