Chapter5_1 - Chapter 5 (Lect 1) Sequential Logic...

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Chapter 5 (Lect 1) Sequential Logic Synchronous Circuits Clock signals Latches SR-latch D-latch Flip-Flops D Flip-Flop J K and T Flip-Flops Characteristic Tables and Equations
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Sequential Logic (Circuit): Combinational circuit that includes storage elements that are connected to form a feedback loop. The information in the storage elements defines the current state of the sequential circuit at any given time When the sequential circuit receives information at its external inputs it uses the information and its current state to determine the binary values at the outputs and if any changes will be made to its internal state in other words the next state . Combinational Circuit Storage Elements Inputs Outputs
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Sequential Logic: Two main types of sequential circuits -- Based on signal timing Synchronous sequential circuit: behavior can be defined based on knowledge of its signals at discrete instants in time. Asynchronous sequential circuit: behavior is based on knowledge of its signals at discrete instants in time and the order in which the inputs change. In this course we will look at Synchronous circuits also known as clocked sequential circuits Clock signal : is a train of periodic timing pulses Use clock signals (denoted clock or clk) to determine when outputs and internal states will change The inputs and current state determine what changes will occur In synchronous circuits memory elements used are flip-flops A flip-flop is a device that stores one-bit of binary information 1 or 0
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This note was uploaded on 12/15/2011 for the course E 202 taught by Professor Staff during the Fall '11 term at University of Alabama - Huntsville.

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Chapter5_1 - Chapter 5 (Lect 1) Sequential Logic...

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