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

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

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

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

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

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

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

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

State Table Characteristics SYEN 3330 Digital Systems

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

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

State Table Characteristics SYEN 3330 Digital Systems

State Diagrams SYEN 3330 Digital Systems

State Diagram (Example) SYEN 3330 Digital Systems

Flip-Flop Input Functions SYEN 3330 Digital Systems

Analysis with Other Flip-Flops SYEN 3330 Digital Systems

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

JK Flip-Flop Circuit Analysis SYEN 3330 Digital Systems

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

JK Flip-Flop, Next State SYEN 3330 Digital Systems

JK Flip-Flop, Next State SYEN 3330 Digital Systems

Review: Sequential Circuits SYEN 3330 Digital Systems

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

Moore and Mealy Example SYEN 3330 Digital Systems

Moore and Mealy Example Tables SYEN 3330 Digital Systems