8/2/2019 Peripheral Devices and Ports
1/22
Engr:SajidaIntroduction to computing
Peripheral devices
A computer device that is not part ofthe essential computer i.e., the memoryand microprocessor
Computer devices that are connected to
the computers motherboard externallyand internally
A special designed software is required
to instruct the computer how to usethese devices
8/2/2019 Peripheral Devices and Ports
2/22
Engr:SajidaIntroduction to computing
such as printer, scanner, keyboard, mouse, tape
device, microphonePeripheral devices can be external -- such as a mouse
,keyboard, printer monitor ,scanner etc
or internal, such as a CD-ROM drive , CD-R drivemodem
8/2/2019 Peripheral Devices and Ports
3/22
Engr:SajidaIntroduction to computing
Peripheral devices can be classified according totheir functions.
Input
Input devices are the type of the computer devicesthat are used to provide the control signals to thecomputer. Keyboard and the Mouse are theexamples of the input devices.
OutputOutput devices are the devices that are used todisplay the results. Printer, scanner, speaker and themonitor are the examples of the output devices.
Storage
A storage device is a device that is used to store theinformation such as hard disk drive, flash drive,floppy disk and the tape drive.
8/2/2019 Peripheral Devices and Ports
4/22
Engr:SajidaIntroduction to computing
Other examples are
Trackballs
Modem
Scanners
Computer projectorprinter
8/2/2019 Peripheral Devices and Ports
5/22
Engr:SajidaIntroduction to computing
Modem transfers data from one computer toanother computer over telephone lines
Scanners converts text or images on paperdocuments into an electronic format that thecomputer can display ,print and store
Projector generates a large image of whats onthe computer screen suitable for conference&lecture presentation
8/2/2019 Peripheral Devices and Ports
6/22
Engr:SajidaIntroduction to computing
Ports
An interface on a computer to connect a
device
most system units feature exterior connectorsor sockets called ports in which hardware
devices are pluggedEach port is connected to the appropriate buson the motherboard so that devices pluggedinto each port can communicate with the CPU
without these ports system could not bootproperly and interaction of software on thesystem is unable
8/2/2019 Peripheral Devices and Ports
7/22
Engr:SajidaIntroduction to computing
Internally, there are several ports for
connecting disk drives , display screens, and
keyboards.
Externally, personal computers have ports for
connecting modems, printers, mice, and other
peripheral devices
8/2/2019 Peripheral Devices and Ports
8/22
Engr:SajidaIntroduction to computing
Standard computer ports
Mouse and keyboard ports
Two USB ports
Serial ports
Parallel ports
Audio ports
Network port
Modem port
Monitor port
8/2/2019 Peripheral Devices and Ports
9/22
Engr:SajidaIntroduction to computing
Standard Computer Ports
8/2/2019 Peripheral Devices and Ports
10/22
Engr:SajidaIntroduction to computing
Mouse and keyboard port
Accepts the key board and mouse plugs
This port uses a PS/2 connector
A mini plug containing 6 pins.
Developed by IBM for connecting the keyboard
and mouse.
8/2/2019 Peripheral Devices and Ports
11/22
Engr:SajidaIntroduction to computing
USB ports
Are used to connect USB devices to the computer
Most new PCs come with two USB ports
becoming the most common port for connecting
device peripherals to personal computers.
accept any number of devices including cameras and
joysticks
8/2/2019 Peripheral Devices and Ports
12/22
Engr:SajidaIntroduction to computing
Serial portSerial port can transmit data one bit at
one timeThey use inexpensive cables and they can
be send data over the long distances
Serial ports can be used for such devicesas keyboards, mice and modems
Serial ports have 9 or 25 pin connectors
8/2/2019 Peripheral Devices and Ports
13/22
Engr:SajidaIntroduction to computing
8/2/2019 Peripheral Devices and Ports
14/22
Engr:SajidaIntroduction to computing
Serial communication
8/2/2019 Peripheral Devices and Ports
15/22
Engr:SajidaIntroduction to computing
Parallel portsOne byte (8 bits) at one time
Making data transfer more faster than those throughserial ports
Require more expensive cables
Used to connect printer and scanners to the PC
Types areECP (extended capabilities ports )and
EPP (enhanced parallel port)
8/2/2019 Peripheral Devices and Ports
16/22
Engr:SajidaIntroduction to computing
Parallel Communications
8/2/2019 Peripheral Devices and Ports
17/22
Engr:SajidaIntroduction to computing
Audio ports
There are three audio ports on modern computer
Network Port
Used to connect a PC to a local area network
Most network cards contain a port that accepts aRJ45 connector
8/2/2019 Peripheral Devices and Ports
18/22
Engr:SajidaIntroduction to computing
Modem port & phone port
Used to connect a modem card to phone portThe most common use of modem is Internet
access
Monitor port
Connected directly on the motherboard or
expansion card
Used to connect a monitor to PC
8/2/2019 Peripheral Devices and Ports
19/22
Engr:SajidaIntroduction to computing
Expansion Ports
These ports allow the connection of specialdevices through the computers expansion bus
SCSI (small computer system Interface )
IEEE1394(Firewire)MIDI (musical instrument digital interface )
8/2/2019 Peripheral Devices and Ports
20/22
Engr:SajidaIntroduction to computing
Small Computer System Interface
Parallel Interface Standard used by most Apple
Macintosh and PCsHigh speed parallel port generally used toconnect disk drives, printer or scanners
SCSI interfaces provide for faster datatransmission rates (up to 80 megabytes persecond) than standard serial and parallel ports
Many devices can be attached to a single SCSIport, so that SCSI is really an I/O bus ratherthan simply an interface
8/2/2019 Peripheral Devices and Ports
21/22
Engr:SajidaIntroduction to computing
A single SCSI adapter extends the bus outsidethe computer by way of a cable
Like an extension cord for a data busBy plugging one extension cord into the other,one SCSI device is attached to the another toform a chain
When devices are connected in this way andplugged into a single port ,they are called adaisy chain
8/2/2019 Peripheral Devices and Ports
22/22
Engr:SajidaIntroduction to computing
Musical instrument digital interface
Used to connect MIDI device to he computer
MIDI devices includes musical keyboards and other
instruments to compose music and stored
electronically
MIDI system are widely used in recording andperforming music to control settings for light system
drum machines, amplification and more
Top Related