Computing

Difference Between ALU and CU

Main difference

ALU and CU are the two basic components of a CPU (Central Processing Unit) in a computer system. ALU stands for Arithmetic Logic Unit, while CU stands for Control Unit. The ALU circuit of the CPU handles all the logical and mathematical operations that the CPU performs. It is responsible for answering the questions and providing the output result of the input queries. The Control Unit (CU) is the part of the CPU that is dedicated to take care of the control purpose. It coordinates with all the hardware components of the computer system and helps them to interact with the software system. CU assigns tasks and monitors the movement of data and information within a computer system between its components.

Comparison chart

aluminum CU
Definition ALU (Arithmetic Logic Unit) is a circuit component of the CPU that deals with mathematical calculations, data processing, and the deduction of all conclusions and logical outputs. CU (Control Unit) is one of the two main components of the CPU. It deals with the coordination between the hardware devices attached to each other, it works as an interactive bridge between the software and the hardware of the computer system.
Functions ALU deals with all mathematical and logical operations. More than one ALU can be used to perform more powerful calculations. The ALU processes the data provided to the CPU as input and provides the information as the conclusion of the input as output. CU deals with the direction of all the tasks and operations performed by the CPU. It coordinates and monitors the functionality of components and tracks the flow of data between hardware components and software.
impact on the other ALU handles the data manipulation and works according to the instructions provided by CU. CU provides instructions to ALU and coordinates according to the nature of the data provided and the nature of the work to be performed.

What is ALU?

ALU stands for arithmetic logic unit. It is the main functional component of the CPU that is responsible for performing all mathematical calculations and logical operations. Data provided as input to computers is manipulated and processed by ALU based on instructions and addresses provided by CU. ALU is responsible for all mathematical calculations and logical answers. All queries or data inserted as input to the system are provided to ALU, which provides the processed conclusions as output. The arithmetic operation includes the four basic mathematical operations addition, subtraction, multiplication and division. Logical operations are those in which there is a comparison between different things by various traits such as equal to, greater than, different from, less than, etc.

What is CU?

CU stands for Control Unit. It is one of the two basic components of a CPU in a computer system. The control unit works as a traffic watchdog as it monitors and controls the data traffic and flow between the hardware components of the computer system such as peripheral devices etc. Provides instructions to the ALU and the other components on how to perform a task. CU is responsible for coordinating between the software system and the hardware components and making them work as a bridge. It assigns the tasks to the inner hardware components and does them within the proper time domain along with efficiency and effectiveness. CU’s main deal is data traffic and buses. It carefully monitors and controls data traffic and maintains the flow of data through data buses in and out of hardware components. It is also known as the “brain within the brain” or “brain of the CPU” as it instructs the software system, hardware components, and other circuitry of the CPU (ALU) what to do and how to do it. It instructs and directs according to the type of data, the nature of the work and the demand for output by the user.

ALU vs CU

  • ALU is the circuit component of the CPU that deals with mathematical and logical operations.
  • CU is the circuitry component of the CPU that instructs and drives the ALU and other computer components.
  • ALU processes the data provided as input and gives the conclusion of the processed information as output. It works according to the instructions provided by CU.
  • CU controls and monitors the flow of data on the data buses between the hardware components of the computer system.

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