PowerPoint Presentation to Accompany Chapter 4 Hardware Objectives

PowerPoint Presentation to Accompany Chapter 4 Hardware Objectives

PowerPoint Presentation to Accompany Chapter 4 Hardware Objectives 1. 2. 3. 4. 5. Explain the Functions of a CPU Identify the Parts of a System Unit and Motherboard

Compare Storage Devices List and Describe Common Input Devices List and Describe Essential Video and Audio Output Devices 6. Compare Various Types of Printers 7. Explain and Provide Examples of Adaptive Technology 8. Discuss Communication Devices Copyright 2017 Pearson Education, Inc. 2 Explain the Functions of a CPU Objective 1

Copyright 2017 Pearson Education, Inc. 3 Functions of the CPU Central Processing Unit (CPU or processor) Brain of the computer housed on the motherboard Arithmetic Logic Unit (ALU) Perform calculations (ALU) Control Unit: Manages data movement through the CPU Execute instructions (Control Unit) Make decisions (control unit)

Objective 1 Copyright 2017 Pearson Education, Inc. 4 Instruction Cycle There are four steps in the instruction cycle: Fetch Instruction is retrieved from main memory Decode Translates instruction into computer command

Execute ALU processes the command Store Results are written back to memory Objective 1 Copyright 2017 Pearson Education, Inc. 5 CPU Performance CPU performance is measured in: Clock speed:

Speed at which the processor executes the machine cycles Overclock Gigahertz (GHz): Billions of cycles per second Objective 1 Copyright 2017 Pearson Education, Inc. 6 CPU Performance Multi-core processor: Two or more processors integrated on a single chip

Increases processing speed Reduces energy consumption GPU (graphics processing unit) A video card that has its own processor Objective 1 Copyright 2017 Pearson Education, Inc. 7 CPU Performance Parallel processing:

Uses multiple processors, or multicore processors, to divide up processing tasks Each processor can use pipelining to further boost processing efficiency Objective 1 Copyright 2017 Pearson Education, Inc. 8 CPU Performance Pipelining: Used by a single processor

When the first instruction moves from stage 1 to stage 2 of the machine cycle, the next instruction moves into stage 1 like an assembly line Objective 1 Copyright 2017 Pearson Education, Inc. 9 CPU Performance and Cooling Processing generates heat

To prevent overheating, the CPU uses: Heat sink draws heat away from the processor Cooling fan positioned above the processor System units have at least one system fan Objective 1 Copyright 2017 Pearson Education, Inc. 10

Identify the Parts of a System Unit and Motherboard Objective 2 Copyright 2017 Pearson Education, Inc. 11 The Motherboard The Main Circuit Board of the Computer This system unit contains:

The CPU or processor (under the cooling fan) The power supply Motherboard (mostly obscured by other components) Memory Objective 2 Copyright 2017 Pearson Education, Inc. 12 Ports and Connectors

Objective 2 Copyright 2017 Pearson Education, Inc. 13 Ports & Connectors Connect Peripherals to the Motherboard Most common ports: USB Firewire (IEEE 1394)

Objective 2 Copyright 2017 Pearson Education, Inc. 14 Memory (Primary Storage) Temporary Storage Holds Instructions & Data Types of memory used by computers: Random Access Memory (RAM): Volatile memory that holds the OS, programs, and data the computer is currently using

Cache memory: Very fast memory used to store frequently accessed information; located close to the processor Level 1 (L1) built into the processor Level 2 (L2) built into the processor on new systems or on the motherboard near the processor on older ones Level 3 (L3) a separate chip on the motherboard near the processor Objective 2 Copyright 2017 Pearson Education, Inc. 15 Compare Storage Devices

Objective 3 Copyright 2017 Pearson Education, Inc. 16 Storage Devices Optical discs CDs DVDs Blu-ray Solid-state storage Flash drives

Memory cards Mobile devices Magnetic storage Hard drive Objective 3 Copyright 2017 Pearson Education, Inc. 17 List and Describe Common Input Devices Objective 4

Copyright 2017 Pearson Education, Inc. 18 Input Devices Devices Used to Get Data into the Computer Keyboard Keypad Mouse Touchpad Stylus Objective 4

Copyright 2017 Pearson Education, Inc. 19 Input Devices Devices Used to Get Data into the Computer Digital cameras and webcams Optical scanners QR code readers Near field communication (NFC) devices Magnetic strip reader

Biometric scanners Joysticks Objective 4 Copyright 2017 Pearson Education, Inc. 20 List and Describe Essential Video and Audio Output Devices Objective 5 Copyright 2017 Pearson Education, Inc.

21 Video Output Devices Monitors Work by lighting pixels (picture elements) on the screen CRT Cathode ray tube; considered legacy technology LCD Liquid crystal display; popular in desktops and notebooks Plasma Larger in size; mostly used with media center systems or in conference rooms

Objective 5 Copyright 2017 Pearson Education, Inc. 22 Video Output Devices Monitors (cont.) Work by lighting pixels (pixel elements) on the screen OLED Organic light-emitting diode; considered next technology of monitors AMOLED Active matrix OLED screens; found in

some mobile devices Sharper and have a wider viewing angle Objective 5 Copyright 2017 Pearson Education, Inc. 23 Video Output Devices Projectors Produce larger output More practical for presentations Examples: DLP (digital light processing) projectors

Hundreds of thousands of tiny swiveling mirrors that create an image Higher contrast and deeper blacks LCD projector Pass light through a prism Poorer contrast and washed-out blacks Objective 5 Copyright 2017 Pearson Education, Inc. 24 Video Cards and Audio Output Devices Video Cards

Expansion cards that provide the data signal and connector for a monitor or projector The card can be integrated on the mother board or connected via: Expansion card External USB FireWire Objective 5 Copyright 2017 Pearson Education, Inc. 25 Video Cards and Audio Output Devices

Audio Output Converts digital signals into sound Provided by: Speakers Headphones Provides audio connections for both: Input devices Output devices Objective 5 Copyright 2017 Pearson Education, Inc. 26

Compare Various Types of Printers Objective 6 Copyright 2017 Pearson Education, Inc. 27 Printers Inkjet printer Sprays droplets of ink onto paper Photo printer Prints high-quality photos

Objective 6 Copyright 2017 Pearson Education, Inc. 28 Printers Dye-sublimation printer Uses heat to turn solid dye into a gas that is then transferred to special paper Thermal Heats specially coated heatsensitive paper, which changes color

when heat is applied Objective 6 Copyright 2017 Pearson Education, Inc. 29 Printers (cont.) Laser Uses a laser beam to draw an image on a drum Plotter Uses pens to draw an image on a roll of

paper Used to produce very large printouts Multifunction Has built-in scanner, fax, copy, and print capabilities Objective 6 Copyright 2017 Pearson Education, Inc. 30 Printers (cont.) Three-dimensional (3D) Creates objects such as prototypes and models by scanning an object or design using computer software

Creates the model by building layers of material Dental and medical imaging Architecture Objective 6 Copyright 2017 Pearson Education, Inc. 31 Explain and Provide Examples of Adaptive Technology Objective 7

Copyright 2017 Pearson Education, Inc. 32 Adaptive Technology Adaptive technology (also called assistive technology) Used by individuals with disabilities to interact with technology Includes both hardware and software Modern operating systems include accessibility settings Americans with Disabilities Act (ADA)(1990 )

Requires employers with 15 or more employees to make reasonable accommodations for disabled employees Objective 7 Copyright 2017 Pearson Education, Inc. 33 Adaptive Technology Input Devices Braille-writing devices Eye-driven keyboards Keyboards with locator dots or large-print key labels On-screen keyboards Voice-recognition software

Objective 7 Copyright 2017 Pearson Education, Inc. 34 Adaptive Technology Output Devices Standard monitors can be adapted by magnifying the screen Speech synthesis screen-reader software and audio alerts Closed captions and visual notifications Braille embossers translate text to Braille

Objective 7 Copyright 2017 Pearson Education, Inc. 35 Discuss Communication Devices Objective 8 Copyright 2017 Pearson Education, Inc. 36

Communication Devices Network Adapters, Modems, and Fax Devices Function as both input and output devices Allow you to connect to other devices on a network or the Internet Examples Network adapters Modems Fax machines Objective 8 Copyright 2017 Pearson Education, Inc.

37 Communication Devices Network Adapters, Modems, and Fax Devices Network adapters: Establish a connection with a network Modems: Connect a computer to a telephone line Used for dial-up Internet access

Fax devices: Stand-alone, part of a multifunction device, or built into a modem Scan a document and convert it into digital format that can be transmitted over telephone lines Objective 8 Copyright 2017 Pearson Education, Inc. 38 Questions Copyright 2017 Pearson Education, Inc.

39 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. Copyright 2017 Pearson Education, Inc. 40

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