2.5 - Hardware

8/10/2019 2.5 - Hardware

1/126

Topic 2: Computer System

8/10/2019 2.5 - Hardware

2/126

2.5 Hardware

2.5.1 Motherboard2.5.2 Processor2.5.3 Memory2.5.4 Input and Output Device2.5.5 Storage2.5.6 Adapter Card

1B-2

8/10/2019 2.5 - Hardware

3/126

Parts of the Computer System

Computer systems have two parts Hardware Software

1B-3

8/10/2019 2.5 - Hardware

4/126

Parts of the Computer System

Hardware Mechanical devices in the computer Anything that can be touched

Software Tell the computer what to do Also called a program Thousands of programs exist

1B-4

8/10/2019 2.5 - Hardware

5/126

Essential Computer Hardware

Computers use the same basic hardwareMotherboardProcessorMemoryInput and Output DeviceStorage

Adapter Card

1B-5

8/10/2019 2.5 - Hardware

6/126

6

Learning Outcomes

At the end of the lesson, students should be ableto:

Identify basic components of a motherboard.

2.5.1 Motherboard

8/10/2019 2.5 - Hardware

7/126

7

System Unit

Case that contains electronic components of thecomputer used to process data.

8/10/2019 2.5 - Hardware

8/126

8

power supply

ports

drive bays

processor

memory

sound card

video cardmodem cardnetwork card

Components of System Unit

MotherboardDrive BaysPower Supply

Casing

8/10/2019 2.5 - Hardware

9/126

9

2.5.1 Motherboard

Main circuit board of the system unit.The functions of the motherboard are:

Holds many components of the system.

Provides connectors for other peripherals.Carries digital data through its printed circuitboard to and from all of the other components

Most common motherboard brand : Intel, Asus, Abit,Gigabyte, AOpen, MSI, PC Partner, AsRock, ECS, Acorp,Biosstar, etc

8/10/2019 2.5 - Hardware

10/126

10

2.5.1 Motherboard

The shape and layout of a motherboard is calledthe form factor .Several examples of form factor:

XT ATBaby-AT

ATXMini-ATXmicroATX

8/10/2019 2.5 - Hardware

11/126

1B-11

8/10/2019 2.5 - Hardware

12/126

12

Basic Components of Motherboard

Processor Slot

Memory Slots

Adapter CardSlots

8/10/2019 2.5 - Hardware

13/126

1B-13

Motherboard Parts

8/10/2019 2.5 - Hardware

14/126

14

Processor Slot

Slot on the motherboard that houses a CPU andforms the electrical interface with the CPU.

8/10/2019 2.5 - Hardware

15/126

15

Memory Slots

Slots on the motherboard that hold memorymodules.To connect RAM and get faster of the performanceof computer.

8/10/2019 2.5 - Hardware

16/126

16

Adapter Cards Slots/Expansion Slots

Slots on the motherboard that can hold adaptercards.For adding more memory, graphics capabilities andsupport for special devices.

8/10/2019 2.5 - Hardware

17/126

17

Cont

Types of adapter card slots :1. PCI

to connect devices such as network cards, soundcards, modems, extra ports such as USB or serial TVtuner cards and disk controllers.

2. AGPspecifically designed for graphics adapters.

8/10/2019 2.5 - Hardware

18/126

18

Learning Outcomes

At the end of the lesson, students should be able to:

Describe the functions of processor. List the steps in a machine cycle.

2.5.2 Processor

8/10/2019 2.5 - Hardware

19/126

19

What is?: An electronic component on a computers motherboard.

Function :Interprets and carries out the basic instructions thatoperate a computer.

How to measure?The speed of CPU is measured by frequency in

Megahertz (MHz) or Gigahertz (GHz) with 1 GHz equalsto 1000 MHz.

2.5.2 Processor / CPU

8/10/2019 2.5 - Hardware

20/126

20

Control Unit (CU) Arithmetic Logic Unit (ALU)

CPU Components

8/10/2019 2.5 - Hardware

21/126

21

Directs and coordinates most of the operations inthe computer.For each instruction, the control unit repeats a setof 4 basic operations known as machine cycle.

Control Unit

8/10/2019 2.5 - Hardware

22/126

22

Performs arithmetic, comparison and otheroperations.

Arithmetic operation perform calculation such asaddition ( +),subtraction ( -),multiplication ( X) anddivison ( /).Comparison operations involve comparing one dataitem with another to determine the result

Logical operation - ==, >=,

8/10/2019 2.5 - Hardware

23/126

23

The operations performed by the CPU to executeany instruction.It consist of 4 operations:

Fetch fetches the instructions from memory.Decode decodes the instructions and sends

the instructions to the ALU.Execute ALU performs the actual operations.Store the result are stored in memory.

Machine Cycle

8/10/2019 2.5 - Hardware

24/126

24

Machine Cycle (cont.)

ProcessorControl Unit

Memory

ALU

p. 188 Fig. 4-5

Step 1. Fetch Obtain programinstruction or dataitem from memory

Step 2.Decode Translateinstructionintocommands

Step 4. Store Write result tomemory

Step 3. ExecuteCarry outcommand

8/10/2019 2.5 - Hardware

25/126

25

Learning Outcomes

At the end of the lesson, students should be ableto:

Explain the function of memory.

Identify different types of memory. Differentiate between RAM and ROM.

2.5.3 Memory

8/10/2019 2.5 - Hardware

26/126

26

Consists of electronic components that storeinstructions waiting to be executed by theprocessor.Consist of one or more chips on themotherboard or some other circuit board inthe computer.Stores three basic categories of item:

1. The operating system and other system software.2. Application program3. The data being processed by the application program

and resulting information

2.5.3 Memory

8/10/2019 2.5 - Hardware

27/126

27

1. VolatileVolatile memory loses its content when thecomputers power turn off.

Example :- RAM (Random Access Memory)

2. Non-volatileDoes not lose its content when the computers power turn off.Example :- ROM (Read Only Memory)

Types of Memory

8/10/2019 2.5 - Hardware

28/126

28

RAM

8/10/2019 2.5 - Hardware

29/126

Types of RAM

Dynamic Random Access Memory (DRAM)

Contents are constantly refreshed 1000 times per second

Access time 60 70 nanoseconds

Note : a nanosecond is one billionth of a second!

Synchronous Dynamic Random Access Memory (SDRAM)

Quicker than DRAM

Access time less than 60 nanoseconds

Direct Rambus Dynamic Random Access Memory (DRDRAM)

New type of RAM architecture

Access time 20 times faster than DRAM

More expensive

8/10/2019 2.5 - Hardware

30/126

8/10/2019 2.5 - Hardware

31/126

Flash RAM Stores information in an array of memory cells made from floating-

gate transistors

Cheap

Non-volatile Slow

Enormously durable

Limited endurance

Types of RAM

8/10/2019 2.5 - Hardware

32/126

Types of RAM

Video Random Access memory

Holds data to be displayed on computer screen

Has two data paths allowing READ and WRITE to occur atthe same time

A systems amount of VRAM relates to the number of coloursand resolution

A graphics card may have its own VRAM chip on board

8/10/2019 2.5 - Hardware

33/126

Types of RAM

MRAM (Magnetoresistive RAM) MRAM uses magnetism rather than electrical power to store bits of data.

No refresh is needed to retain the data.

For users of laptops and other mobile devices, such as MP3 players and

cell phones, MRAM is the holy grail of longer battery life

8/10/2019 2.5 - Hardware

34/126

1B-34

DRAM vs SRAM

1. SRAM is static while DRAM is dynamic

2. SRAM is faster compared to DRAM

3. SRAM consumes less power than DRAM

4. SRAM uses more transistors per bit of memory compared to DRAM

5. SRAM is more expensive than DRAM

6. Cheaper DRAM is used in main memory while SRAM is commonlyused in cache memory

8/10/2019 2.5 - Hardware

35/126

MRAM Vs Other RAM Technologies

8/10/2019 2.5 - Hardware

36/126

MRAM Vs Other RAM Technologies

MRAMcombines thebestcharacteristicsof DRAM,SRAM andFlash RAM

8/10/2019 2.5 - Hardware

37/126

37

ROM

8/10/2019 2.5 - Hardware

38/126

Types of ROM

1. Programmable Read Only Memory (PROM)

Empty of data when manufactured May be permanently programmed by the user

2. Erasable Programmable Read Only Memory (EPROM)

Can be programmed, erased and reprogrammed

The EPROM chip has a small window on top allowing it to be erased byshining ultra-violet light on it

After reprogramming the window is covered to prevent new contentsbeing erased

Access time is around 45 90 nanoseconds

8/10/2019 2.5 - Hardware

39/126

Types of ROM3. Electrically Erasable Programmable Read Only Memory (EEPROM)

Reprogrammed electrically without using ultraviolet light

Must be removed from the computer and placed in a special machine to dothis

Access times between 45 and 200 nanoseconds4. Flash ROM

Similar to EEPROM However, can be reprogrammed while still in the computer

Easier to upgrade programs stored in Flash ROM

Used to store programs in devices e.g. modems

Access time is around 45 90 nanoseconds

5. ROM cartridges

Commonly used in games machines

Prevents software from being easily copied

8/10/2019 2.5 - Hardware

40/126

Computer Memory BasicsTypical scenario how memory work :

You turn the computer on. The computer loads data from read-only memory (ROM) and

performs a power-on self-test (POST) to make sure all the majorcomponents are functioning properly.

The computer loads the basic input/output system (BIOS) fromROM.

The computer loads the operating system (OS) from the hard driveinto the system's RAM.

When you open an application , it is loaded into RAM.

After an application is loaded, any files that are opened for use inthat application are loaded into RAM.

When you save a file and close the application, the file is written tothe specified storage device, and then it and the application are

purged from RAM. 1B-40

8/10/2019 2.5 - Hardware

41/126

1B-41

8/10/2019 2.5 - Hardware

42/126

42

Learning Outcomes


Explain types of input and output devices. Describe the functions of input and output devices.

2.5.4 Input and Output Devices

8/10/2019 2.5 - Hardware

43/126

43


Input Input Devicesany data and instructionsentered into a memory of a

computer.

Example : text, number,sound etc

VS any hardware componentthat allows users to enter

data and instructions into acomputer.

Example : Mouse, Keyboard,Scanner,Microphone

8/10/2019 2.5 - Hardware

44/126

44


Output Output Devices

data that has beenprocessed into a useful

form.

Example :SPM Result, TelephoneBills

VS Any hardwarecomponent that

conveys information topeople.

Example :Monitor,Printer,Speaker

8/10/2019 2.5 - Hardware

45/126

8/10/2019 2.5 - Hardware

46/126

46

Input device that contains keys users press to enterdata and instructions into a computer.Types of keyboard:

Keyboard ergonomicsWireless

Keyboard

status light

numeric keypad

function keystyping area

arrow keys

8/10/2019 2.5 - Hardware

47/126

4

7

Transmits data using wireless technology.Communicate with a receiver attached to a port onthe system unit.

Wireless or Cordless Keyboard

8/10/2019 2.5 - Hardware

48/126

4

8

Design that reduces the chance of wrist and handsinjuries.The goal of ergonomics is to incorporate comfort,efficiency and safety in the design of theworkspace.

Ergonomic Keyboard

8/10/2019 2.5 - Hardware

49/126

4

9

Input device that allows a user to control a pointeron the screen.

A pointing device can be used to:Move the insertion point;Select text, graphics and other objects;Click buttons, icons, links and menu commands.

Pointing Devices

8/10/2019 2.5 - Hardware

50/126

5

0

Examples of pointing devices:MouseTrackballTouchpadPointing stick

Cont

8/10/2019 2.5 - Hardware

51/126

5

1

Pointing device that fits under the palm of yourhand.Types of mouse:

Mechanical mouseOptical mouseLaser mouse

Air mouse

Wireless mouse

Mouse

mouse buttons

wheel button

mouse pad

ball

8/10/2019 2.5 - Hardware

52/126

5

2

Device that emits and sense light to detect themouses movement.Does not require cleaning but it is more expensive.

Optical Mouse

8/10/2019 2.5 - Hardware

53/126

5

3

Is a battery-powered device that transmits datausing wireless technology such as radio waves(Bluetooth) or infrared light waves (IrDA).

Wireless Mouse

8/10/2019 2.5 - Hardware

54/126

5

4

Is a stationary pointing device with a ball on its topor side.

A trackball requires frequent cleaning because itpicks up oils from fingers and dust from theenvironment.

Trackball

8/10/2019 2.5 - Hardware

55/126

5

5

Is a small, flat, rectangular pointing device that issensitive to pressure and motion.

Are found most often on notebook computers.

Touchpad

8/10/2019 2.5 - Hardware

56/126

5

6

Is a touch-sensitive display device.Users can interact with touch screens by touchingarea of the screens.

Touch Screen

8/10/2019 2.5 - Hardware

57/126

5

7

Users write, draw and tap on the flat surface toenter data.Examples of pen input:

StylusDigital penSignature capture pad

Pen Input

Stylus

Digital pen

8/10/2019 2.5 - Hardware

58/126

5

8

Is the process of entering any sound into thecomputer such as speech, music and soundeffects.

Audio Input

8/10/2019 2.5 - Hardware

59/126

5

9

Is the process of capturing full-motion images andstoring them on a computers storage medium.Use digital signals.

Video Input

8/10/2019 2.5 - Hardware

60/126

6

0

Capture data from a source document, which is theoriginal form of the data.Types of scanners:

FlatbedPen or handheldSheet-FedDrum

Scanners

8/10/2019 2.5 - Hardware

61/126

6

1

Is a device that uses a light source to readcharacters, marks and codes and then convertsthem into digital data that a computer can process.Technologies used by optical readers are:

Optical Character Recognition (OCR)Optical Mark Recognition (OMR)

Optical Readers

8/10/2019 2.5 - Hardware

62/126

8/10/2019 2.5 - Hardware

63/126

8/10/2019 2.5 - Hardware

64/126

6

4

Reads the magnetic stripe on the back of creditcards, entertainment cards, bank cards and othersimilar cards.

Magnetic Stripe Card Readers

8/10/2019 2.5 - Hardware

65/126

8/10/2019 2.5 - Hardware

66/126

6

6

Technology of authenticating a persons identity byverifying a personal characteristic.Examples of biometric technology are:

FingerprintsHand geometryFacial featuresVoice

SignaturesEye patterns

Biometric Input

8/10/2019 2.5 - Hardware

67/126

6

7

Display devicesPrinters

Audio output device

Data projector

Types of Output Device

8/10/2019 2.5 - Hardware

68/126

6

8

An output device that visually conveys text,graphics and video information.Types of display devices are:

CRT monitorLCD monitorPlasma monitor

Display Devices

8/10/2019 2.5 - Hardware

69/126

8/10/2019 2.5 - Hardware

70/126

7

0

A desktop monitor that uses a liquid crystal displayto produce images.Produce sharp and flicker free images.

LCD Monitors

8/10/2019 2.5 - Hardware

71/126

7

1

A display device that uses gas plasma technology.Offer larger screen sizes and high-quality display.

Plasma Monitors

8/10/2019 2.5 - Hardware

72/126

7

2

An output device that produces text and graphicson a physical medium such as paper.Types of printer are:

Impact printersNon impact printers

Printers

8/10/2019 2.5 - Hardware

73/126

7

3

Forms characters and graphics on a piece of paperby striking a mechanism against an inked ribbonthat physically contacts the paper.Widely used for business.

Impact Printers

8/10/2019 2.5 - Hardware

74/126

8/10/2019 2.5 - Hardware

75/126

7

5

Spray tiny drops of liquid ink onto a piece of paper.Can print black / white and several different

colors.Resolution measured by dpi (dots per inch).Dot a drop of ink (the higher dpi, the

smaller drops of ink).Speed - measured by ppm (pages per

minute).

Ink-Jet Printers

8/10/2019 2.5 - Hardware

76/126

7

6

Used a laser beam and powdered ink to transferimages onto paper.Is a high-speed and high quality nonimpact printer.

Laser Printers

8/10/2019 2.5 - Hardware

77/126

7

7

Are sophisticated printers used to produce high-quality drawings such as blue-prints, maps andcircuit diagrams.

Are used in specialized fields such as engineeringand drafting and usually are very costly.

Plotters

8/10/2019 2.5 - Hardware

78/126

7

8

A component of a computer that produce music,speech or other sound.Three commonly used audio output devices are:

SpeakersHeadphonesEarbuds

Audio Output Device

8/10/2019 2.5 - Hardware

79/126

7

9

Data Projector is an output device that projectsoutput of computer screen onto a larger screen.The output projected by projectors can be viewedby a number of people very clearly.Projectors are used in classes to deliver the lectureto many students.

Types of Projectors are:

1. LCD Projectors (Liquid Crystal Display)2. DLP Projectors (Digital Light Processing)

Projectors:

8/10/2019 2.5 - Hardware

80/126

8/10/2019 2.5 - Hardware

81/126

8

1

Digital Light Processing (DLP) is a trademarkowned by Texas Instruments, representing atechnology used in some TVs and video projectors.

A type of video projector capable of high brightnessand contrast.

DLP Projectors

2 5 5 S

8/10/2019 2.5 - Hardware

82/126

8

2

Learning Outcomes


Explain the types of storage. Describe the functions of storage. Differentiate between primary and secondary storage.

2.5.5 Storage

8/10/2019 2.5 - Hardware

83/126

2.5.4 Storage

Storage holds data, instructions, andinformation for future use

A storage medium is the physicalmaterial on which a computer keepsdata, instructions, and information

Discovering Computers 2012: Chapter 7 83Pages 352 - 353

8/10/2019 2.5 - Hardware

84/126

2.5.4 Storage

Discovering Computers 2012: Chapter 7 84Pages 352

353Figure 7-1

8/10/2019 2.5 - Hardware

85/126

2.5.4 Storage

Capacity is the number of bytes a storage mediumcan hold

Discovering Computers 2012: Chapter 7 85Page 354Figure 7-2

2 5 4 S

8/10/2019 2.5 - Hardware

86/126

2.5.4 Storage

A storage device is the computer hardware thatrecords and/or retrieves items to and fromstorage media

Discovering Computers 2012: Chapter 7 86Page 354

Reading is the processof transferring itemsfrom a storage mediuminto memory

Writing is the process oftransferring items frommemory to a storagemedium

2 5 4 S

8/10/2019 2.5 - Hardware

87/126

2.5.4 Storage

Access time measures: The amount of time it

takes a storage device tolocate an item on astorage medium

The time required todeliver an item frommemory to the

processor


2 5 4 S

8/10/2019 2.5 - Hardware

88/126

2.5.4 Storage

Types of storage are:1. Primary storage2. Secondary storage

88

8/10/2019 2.5 - Hardware

89/126

T f P i St g

8/10/2019 2.5 - Hardware

90/126

9

0

RAMROM

Types of Primary Storage

8/10/2019 2.5 - Hardware

91/126

T pes of Secondar Storage

8/10/2019 2.5 - Hardware

92/126

9

2

Magnetic storageOptical discFlash Memory

Types of Secondary Storage

Magnetic Storage

8/10/2019 2.5 - Hardware

93/126

9

3

Uses different patterns of magnetization on amagnetically coated surface to store information.Examples of magnetic storage are:o Hard Disko Floppy disko Tape

Magnetic Storage

Hard Disk

8/10/2019 2.5 - Hardware

94/126

9

4

High-capacity storage.Consists of several inflexible, circular platters thatstore items electronically.Components enclosed in airtight, sealed case forprotection.

Hard Disk

Magnetic Tape

8/10/2019 2.5 - Hardware

95/126

95

One of the first storage used with mainframecomputer.It's a thin plastic tape that has been coated withsubstance that can be magnetized.

Mainly used for backup.

Magnetic Tape

8/10/2019 2.5 - Hardware

96/126

8/10/2019 2.5 - Hardware

97/126

Compact Disc

8/10/2019 2.5 - Hardware

98/126

Compact Disc

A CD-ROM can be read from but not written to Read from a CD-ROM drive or CD-ROM player

A CD-R is a multisession optical disc on whichusers can write, but not erase

A CD-RW is an erasable multisession disc Must have a CD-RW drive

Discovering Computers 2012: Chapter 7 98Pages 372 373Figure 7-29

8/10/2019 2.5 - Hardware

99/126

Digital video Disc

8/10/2019 2.5 - Hardware

100/126

Digital video Disc

A DVD-ROM is a high-capacity optical disc onwhich users can read but not write or erase Requires a DVD-ROM drive

A Blu-ray Disc-ROM (BD-ROM) has a storagecapacity of 100 GB

DVD-RW, DVD+RW, and DVD+RAM are high-capacity rewritable DVD formats

Discovering Computers 2012: Chapter 7 100Pages 375 376Figure 7-29

Blu Ray Disc

8/10/2019 2.5 - Hardware

101/126

10

1

Refers to the "blue laser" used to read the disc. Allows for six times more storage than a DVD.

Blu-Ray Disc

Flash Memory

8/10/2019 2.5 - Hardware

102/126

1B-102

Flash Memory

Flash memory is a solid-state chip that maintainsstored data without any external power source.Commonly used in portable electronics andremovable storage devices, and to replace

computer hard drives.Inside the flash chip, data is stored in cellsprotected by floating gates.

Flash Memory

8/10/2019 2.5 - Hardware

103/126

1B-103

Flash Memory

Tunneling electrons change the gate's electroniccharge in "a flash" (hence the name), clearing thecell of its contents so it can be rewritten.Types of flash memory storage device include

Solid State DriveMemory CardsUSB Flash DriveExpress Card Module

Solid State Drive (SSD)

8/10/2019 2.5 - Hardware

104/126

10

4

Typically uses flash memory to storedata,instruction and information.Data is retained in non-volatile memory chips andcontain no moving parts.

Small, lightweight and highly reliable.


Advantages Disadvantages

quieter and smaller than hard drives Higher failure rate than hard disks

provide faster response, access and boot-up times

Cost is much higher pergigabyte

consume much less power and run cooler.

no moving parts, so mechanical failure isnear zero.


8/10/2019 2.5 - Hardware

105/126

10

5

Examples of SSD are:o SmartMediao MicroSDo Compact Flasho Pen Drive


Memory Cards

8/10/2019 2.5 - Hardware

106/126

10

6

A memory card is a removable flash memorydevice, usually no bigger than 1.5 inches in heightand width, that we insert and remove from a slot ina computer, mobile device, or card reader

Common types of memory card:Compact Flash (CF)Secure Digital (SD)Secure Digital High Capacity(SDHC)

microSDmicroSDHC

xD Picture CardMemory Stick

Memory Cards

USB Flash Drives

8/10/2019 2.5 - Hardware

107/126

10

7

Sometimes called a thumb drive, is a flash memorystorage device that plug in in a USB port on acomputer or mobile device.Convenient for mobile users because they are

small and lightweight to be transported. :

USB Flash Drives

Differences Between Primary and

8/10/2019 2.5 - Hardware

108/126

10

8

Secondary Storage

PRIMARY STORAGE SECONDARY STORAGE

Limited capacity.Store data temporarily.

Expensive.Fast data access.Directly accessible tothe CPU.

Extendible capacity.Store data permanently.

Cheaper.Slower data access.Contents copied to mainmemory before being

accessed by CPU.

2.5.6 Adapter Card

8/10/2019 2.5 - Hardware

109/126

10

9

Learning Outcomes


Explain the types of adapter cards. Describe the functions of adapters.

2.5.6 Adapter Card

8/10/2019 2.5 - Hardware

110/126

2 5 6 Adapter Card

8/10/2019 2.5 - Hardware

111/126

2.5.6 Adapter Card

1B-111

2.5.6 Adapter Card

8/10/2019 2.5 - Hardware

112/126

11

2

A circuit board that enhances functions of thecomponent of a system unit and/or providesconnections to peripherals (external devices).

Adapter cards allow users to install more powerful

components than those embedded on themotherboard and the addition of features notoriginally available with their systems.

2.5.6 Adapter Card

8/10/2019 2.5 - Hardware

113/126

2.5.6 Adapter Card

8/10/2019 2.5 - Hardware

114/126

11

4

Some of the commonly used adapter cards areSound cards accept audio input from amicrophone and convert it into a form that can beprocessed by the computer

2.5.6 Adapter Card

Types of Adapter Cards

8/10/2019 2.5 - Hardware

115/126

11

5

Types of Adapter Cards

ADAPTER CARD PURPOSECableCARD Allows viewing of digital cabletelevision channels.

Disc controller Connects disk drives.FireWire Connects to FireWire devices.HDTV tuner Allows viewing of HDTV

broadcasts on the monitor.

MIDI Connects musical instruments.

Cont

8/10/2019 2.5 - Hardware

116/126

11

6

ADAPTER CARD PURPOSEModem Connects other computersthrough telephone lines, cabletelevision lines, or other

transmission media.Network Connects other computers and

peripherals.

PC-to-TV converter Connects a television.Sound Connects speakers or a

microphone.

Cont

8/10/2019 2.5 - Hardware

117/126

11

7

ADAPTER CARD PURPOSETV tuner Allows viewing of televisionchannels on the monitor.

USB Connects to USB devices.Video Connects a monitor.Video capture Connects an analog video

camera or VCR.

8/10/2019 2.5 - Hardware

118/126

Ports and Connectors

8/10/2019 2.5 - Hardware

119/126




8/10/2019 2.5 - Hardware

120/126


On a notebook computer, the ports are on theback, front, and/or sides

Discovering Computers 2012: Chapter 4120Pages 232 - 233

Figure 4-30


8/10/2019 2.5 - Hardware

121/126




8/10/2019 2.5 - Hardware

122/126


A USB port can connect up to 127 differentperipherals together with a single connector You can attach multiple peripherals using a single USB

port with a USB hub



8/10/2019 2.5 - Hardware

123/126


Other types of ports include:

Discovering Computers 2012: Chapter 4 123Pages 234 - 236

Firewireport

Bluetooth port SCSI port

eSATAport IrDA port Serial port

MIDI port


8/10/2019 2.5 - Hardware

124/126

o ts a d Co ecto s

A Bluetooth wireless portadapter converts a USB port intoa Bluetooth port

A smart phone mightcommunicate with a notebookcomputer using an IrDA port

Discovering Computers 2012: Chapter 4 124Page 235Figures 4-33 4-34


8/10/2019 2.5 - Hardware

125/126

A port replicator is anexternal device thatprovides connections toperipherals through portsbuilt into the device

A docking station is anexternal device thatattaches to a mobilecomputer or device


Summary

8/10/2019 2.5 - Hardware

126/126

MotherboardProcessorMemoryInput and Output DeviceStorage

Adapter Card

2.5 - Hardware

Documents

Transcript of 2.5 - Hardware