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SYEN 3330 Digital Systems

SYEN 3330 Digital Systems. Chapter 6 – Part 3. 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

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SYEN 3330 Digital Systems

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  1. SYEN 3330 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. Outputs Inputs Combina-tional Logic Storage Elements Next State State Sequential Circuit Analysis CLK SYEN 3330 Digital Systems

  4. Example (from Fig. 6-17) SYEN 3330 Digital Systems

  5. Example (Fig. 6-17) (Continued) SYEN 3330 Digital Systems

  6. Example (Fig. 6-17) (Continued) • Where in time are inputs, outputs and states defined? 1 0 1 0 0 0 1 0 SYEN 3330 Digital Systems

  7. Example (Fig. 6-17) (Continued) • Where in time are inputs, outputs and states defined? 1 0 1 0 0 0 1 0 SYEN 3330 Digital Systems

  8. State Table Characteristics SYEN 3330 Digital Systems

  9. Example: State Table (Fig. 6-17) The STATE TABLE can be filled in using the next state and output equations.  SYEN 3330 Digital Systems

  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. SYEN 3330 Digital Systems

  11. State Table Characteristics SYEN 3330 Digital Systems

  12. State Diagrams SYEN 3330 Digital Systems

  13. State Diagram (Example) SYEN 3330 Digital Systems

  14. Flip-Flop Input Functions SYEN 3330 Digital Systems

  15. Analysis with Other Flip-Flops SYEN 3330 Digital Systems

  16. Characteristic Tables (Review 6-7) SYEN 3330 Digital Systems

  17. JK Flip-Flop Circuit Analysis SYEN 3330 Digital Systems

  18. JK Flip-Flop Analysis (Cont.) SYEN 3330 Digital Systems

  19. JK Flip-Flop, Next State SYEN 3330 Digital Systems

  20. JK Flip-Flop, Next State SYEN 3330 Digital Systems

  21. Review: Sequential Circuits SYEN 3330 Digital Systems

  22. Moore and Mealy Models Sequential Logic, or Sequential Machines are also called Finite State Automata. Two formal models exist: SYEN 3330 Digital Systems

  23. Moore and Mealy Example SYEN 3330 Digital Systems

  24. Moore and Mealy Example Tables SYEN 3330 Digital Systems

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