What is the Difference Between ALU and CPU?

The main difference between an Arithmetic Logic Unit (ALU) and a Central Processing Unit (CPU) is that the ALU is a subsystem or component of the CPU, responsible for performing arithmetic and logic operations, while the CPU is the electronic circuit that carries out instructions of a computer program to perform logical, control, and input/output operations.

The CPU consists of two main subsystems: the ALU and the Control Unit (CU). The ALU handles arithmetic operations (addition, subtraction, division, multiplication) and logical operations (determining whether a statement is true or false). In modern computers, the ALU is divided into two categories: the Arithmetic Unit (AU) and the Logic Unit (LU).

On the other hand, the CU regulates the flow of data and instructions within the CPU. It sends timing and control signals to other units and manages resources.

In summary:

• ALU performs arithmetic and logical operations.
• CU regulates the flow of data and instructions within the CPU and manages resources.
• CPU is the electronic circuit that carries out instructions of a computer program, including both ALU and CU functions.

Comparative Table: ALU vs CPU

Here is a table comparing the differences between an Arithmetic Logic Unit (ALU) and a Central Processing Unit (CPU):

The ALU is an essential component within the CPU, responsible for performing arithmetic and logical operations. On the other hand, the CPU is the main processing unit in a computer, managing and coordinating most of the operations in the computer, including fetching, decoding, and executing instructions.