Skip to main content

Explain Parts of CPU and its Working

CENTRAL PROCESSING UNIT / CPU / Microprocessor / Processor


Central processing unit is the brain of computer. It is also called CPU or processor. Processor is used to process data according to given instructions. It performs arithmetic and logical operations on data.
Parts / Components of CPU / Processor on computergap.com
Parts / Components of CPU / Processor on computergap.com

It controls all activities of different parts of a computer. As brain in human body controls all other parts of body and takes decisions, CPU controls all other parts of the computer and their working. A CPU has three basic parts: Arithmetic Logic unit, Control unit and Registers.
Parts Components of Processor or CPU on computergap.com
Parts of Microprocessor or Processor or CPU or Central Processing Unit computergap.com

1.    ARITHMETIC LOGIC UNIT (ALU)


ALU performs data processing according to given instructions. All computations are done in this unit. ALU is the real place in computer where actual execution of instructions takes place. ALU may be further categorized into two sections according to their function:
ARITHMETIC SECTION of ALU performs arithmetic operations like addition, subtraction, multiplication and division on data.
LOGIC SECTION of ALU performs logical operations like comparison between two values. For example, 10>5 will give TRUE answer. And 5<1 will give FALSE answer. Control unit sends data and instruction to perform calculation on the data to the ALU. ALU then performs this calculation. 

2.    CONTROL UNIT


Control unit controls all over operations of different parts of computer. For example it takes data and instructions from input unit and stores it into memory. It sends data to ALU for processing. It takes results from ALU and sends it to output device. It can also store results in memory. Control unit performs all these functions by giving commands to relevant part of the computer.
Control unit performs following four functions for executing instructions of a computer program.

  1.  Fetching: obtaining instruction from memory
  2.  Decoding: understanding this instruction
  3.  Data Fetching: If needed, obtaining data from memory
  4.  Executing: Control unit sends the instruction and data to ALU for taking suitable action on the instruction

3.    REGISTERS


A register is a very small and temporary memory area in ALU. It holds instruction and data as long as it is being processed by CPU. When instruction and data is fetched from memory then it is stored in a register. ALU contains a number of registers for example AX, BX, CX, DX etc. A Register may be of 8 bits, 16 bits, 32 bits or more.

Comments

pc happy said…
Thanks for this post.......... i agree with your views for cpu parts. Good information for provide the microprocessor pentium 4, alu,control list, rigister.
cheapest computer parts
Admin X2 said…
Thanks for your comments!
For more free web traffic towards your blog or website, please add your site totally free:
Free-Traffic-Totally Free Web Traffic

Get Your Free Web traffic Share From The World!

Popular posts from this blog

Explain Main Difference Between System Software and Application Software

Topic: Explain Main Difference Between System Software and Application Software            Differentiate between system software and application software Before , explaining the main differences between application software and system software, let us know the definitions of Application software and System software with examples. What is System Software: System software is a set of programs to control all components of computer and to manage overall operations of computer system. Differences between System software and application software System software is used as a base to install and run all application software. Examples of system software include: Operating Systems, like Microsoft Windows, DOS, Unix and Linux Device Drivers like Device driver software of a Printer (found on CD normally provided with the printer) Utility Programs like AVAST anti virus, Disk Scanners and File Viewers etc. What is Applicat...

Advantages and Disadvantages of Mesh Topology

Topic: Advantages and Disadvantages of Mesh Topology Mesh Topology In a mesh topology, every device on the network is physically connected to every other device on the network. Therefore, data can be sent on several possible paths from source computer to destination computer. Mesh topology is more reliable with better performance. Mesh Network Topology is mostly used in wide area networks where reliability is important. Advantages of Mesh Network Topology 1. Since, there are many links to transfer data, Mesh topology gets rid of the traffic problem . Data may be transferred through different links. 2. If one link becomes unusable, it does not disturb the whole system . Other links can be used for communication. 3. Since each node has physical connection with other nodes, therefore, one node can transfer data to many nodes at the same time. Disadvantages of Mesh Network Topology 1. It is very expensive due to implementation of multiple links for each no...

Uses Of Computer in Medical Field

Today Computers are an essential part of an hospital . Doctors and administration staff uses computers to manage patient history and medicine stocks etc. Computers play a key role in the medical field .  Their uses include storing patient related data, housing knowledge bases, providing the logic and circuitry for medical equipment, scanning and imaging the body, and facilitating speedy communications. Computers can be used in medical field in the following ways: Uses of Computers in Medical Field Top Seven Uses of Computers in Medical Field    Hospital Administration These days, Computers are being used in hospitals extensively . We can computerize the accounting, payroll and stock system of the hospital. We can keep the record of different medicines.  Recording Medical History Of Patients Computer can be used to store the medical history of the patients . Medical history is very important for patients as well as doctors. Doctors may ...