Lecture 2 CompApp ComputerHardware

8/10/2019 Lecture 2 CompApp ComputerHardware

1/21

Computer

ApplicationChapter 2: Computer Hardware

Ms Saidah Sarpudin

[email protected]

-0136089349-


2/21

Understanding on function of processor

Understanding on function of Data storage

Understanding on function of Input devices

Understanding on function of Output device


3/21

Input Device

Output

Device

CPU /Memory

Storage

Device


4/21
http://www.google.com.my/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&docid=t_mNYEuNLkdeUM&tbnid=1QPhL7tQPnGwDM:&ved=0CAUQjRw&url=http://www.comptechdoc.org/hardware/pc/begin/hwinside.html&ei=HZ65U96LMYPOkQW0iYDABw&bvm=bv.70138588,d.dGI&psig=AFQjCNHJ-rFCnNVyMX3kIn3IrTlx9ySbow&ust=1404759893505310


5/21


6/21

Computer

Hardware

CPU

Storage

Input

Device

Output

Device


7/21

Central processing UNIT (CPU) takes data and instructionsfrom storage unit and makes all sorts of calculations based on

the instructions given and the type of data provided.

Then, it send back to the storage unit

CPU includes Arithmetic Logic Unit (ALU) and Control Unit(CU


8/21

Arithmetic Logic Unit

All calculations and comparisonsbased on the instruction provided are

carried out within the ALU.

It performs arithmetic functions likeaddition, subtraction, multiplication,

division and also logical operationslike greater than, less than and equal

to.

Control Unit

Controlling of all operations likeinput, processing and output are

performed by control unit.

It takes care of step by stepprocessing of all operations in side

the computer


9/21


10/21


11/21

Output

Device

Storage

Input

Device


12/21

Storage Device is hardware device capable of holdinginformation.

There are two(2) storage device used in computers.There are primary storage and secondary storage

Primary Storage is .

Example of input devices include keyboards, mouse,scanners, digital cameras and joysticks


13/21


14/21

Output device is any peripheral that

receive or displays output from acomputer.

Types of output devices such asprinter, headphone, monitor, projector,sound card, speakers, TV


15/21


16/21

Storage Device are devices used

to input data or information. There

are two (2) storage devices used

in the computer. There are:

a) Primary storageb) Secondary storage.


17/21


18/21

Also known as main memory or internal memory.

The memory for the CPU

The only one directly accessible to the CPU.

The CPU continuously reads instructions stored there and executesthem as required.

Any data actively operated on is also stored there in uniform manner.

PrimaryStorage

The computer usually uses its input/output channels to accesssecondary storage and transfers the desired data using intermediatearea in primary storage.

Secondary storage does not lose the data when the device ispowered down it is non-volatile. Per unit, it is typically also two ordersof magnitude less expensive than primary storage.

Modern computer systems typically have two orders of magnitudemore secondary storage than primary storage and data are kept for alonger time there.

SecondaryStorage


19/21


20/21

A computer communication device is a tool that enables

two or more computers to talk to each other.

For the communication to occur, the computers must

agree on the protocols and other procedures to be used. There are several kinds of communications devices used

in a computer.

Some of the device provide different ways of achieving

the same functionality and some that provide specializedservices.


21/21

Communication

Device

Wireless

Bluetooth

Wi-fiCards

Routers

Modems

Lecture 2 CompApp ComputerHardware

Documents

Transcript of Lecture 2 CompApp ComputerHardware