Lesson 8 LAB AM
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School
Arizona State University**We aren't endorsed by this school
Course
CSE 120
Subject
Computer Science
Date
Dec 28, 2024
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4
Uploaded by SuperOryx4830
Lab 8 Report Atif MohamedCSC120Fall 2024Introduction to Latches and Flip-FlopsLatches and flip-flops are essential components of digital electronics, designed to store and manage binary data. These elements are integral to the creation of memory units, registers, andsequential logic circuits. In digital systems, they serve as core memory devices, maintaining theirstate until explicitly modified by incoming signals.
Task 1 – Gated Latches (S-R and D)Description: Latch: A latch is a simple memory device used to store a single bit of data. Its output changes based on the input. Gated Latch: A gated latch includes an additional Enable control signal that determines whether the latch updates its state. When the Enable signal is high, the latch can update its status; when it is low, the latch retains its current state. Latches as Memory: Latches function as memory devices by storing a bit of data until input signals cause a change. This stored data can be read at any time, allowing for temporary value retention. Advantages: The Enable control provides a key advantage by allowing updates to the latch only when desired. This ensures the latch changes state only when the Enable signal is active, preventing unintended modifications. Outline the differences between S-R and D gated latches: S-R latch:Inputs- Setting (S) and Reset(R) When S is 1, the output Q is set to 1; when R is 1, it is reset to 0. When S andR both equal 0, the output stays in its prior condition.Truth Table Circuit Diagram: (provide a side-by-side comparison of the chip schematic circuits)Discuss the advantages/disadvantages of S-R vs. D latches:S-R Latch:Advantages: Provides precise control over setting and resetting the latch.Disadvantages: Can exhibit unpredictable behavior when both S and R are 1, resulting in an
undefined state.D Latch:Advantages: Simplifies design with a single data input and eliminates the issue of an undefined state.Disadvantages: Does not allow explicit setting or resetting without modifying the data input.Discuss why these are sequential circuits; Identify the special feature of the logic circuit that makes these sequential circuits.Task 2 – D flip-flop (master-slave)Description: A flip-flop is a bistable device that changes states on the edge of a clock signal and stores a single bit of data. Common types of flip-flops include S-R, D, J-K, and T flip-flops.Comparison Between Latches and Flip-Flops:Latch: A latch is level-triggered, meaning its state changes continuously while the enable signal is active.Flip-Flop: A flip-flop is edge-triggered, updating its state only during a specific transition of the clock signal, either on the rising edge or the falling edge.Characteristic Table: A D flip-flop is positive-edge triggered.Circuit Diagram: (chip schematic circuit for master-slave D Flip-Flop)Explain how the master-slave scheme works to ensure changes only occur on a clock edge.
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