Components of CPU

This post is lesson 27 of 42 in the subject Computer Hardware

1. Structure of CPU

CPU consists of many different components:

  • Control Unit (CU)
  • Arithmetic Logic Unit (ALU)
  • Register
  • Cache L1
  • Cache L2
  • Cache L3
  • Instruction Decoder
  • I/O (Input/Output) Bus
Structure of CPU

2. Components of CPU

CU – Control Unit

Control Unit is processing center, responsible for decoding commands, generating signals to control other components.

ALU – Arithmetic Logic Unit

ALU do the math operations (addition, subtraction, multiplication, division) and simple logic (AND, OR, XOR, NOT).

RF – Register Files

Register Files is used to store temporary information for operations of CPU.

Cache Memory

It located inside the CPU, has a small capacity, has an access speed approximately equal to the CPU’s working speed.

Cache memory in CPU

Cache memory helps CPU to work regularly without interrupting due to waiting for data. Cache memory is made of static Ram, which is very expensive.

There are types of cache: L1 (Level 1), L2 (Level 2), L3 (Level 3):

  • Cache L1 (inside CPU) stores Data and Instruction.
  • Cache L2 (near L1 cache) contains instructions and data to be executed next.
  • Cache L3 (maybe) contains data from RAM, storage device store.

How to check cache memory capacity

Check cache memory with CPU-Z
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Posted by Vinh Le

Composer at ITLearningCorner.

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