Components of Cpu Basic 3 Basic Technology Lesson Note

More Parts of the CPU

In our last class, we learned about the Control Unit. Today we learn about other important parts inside the CPU.

Arithmetic Logic Unit (ALU)

• Does all math calculations (addition, subtraction)
• Performs logical operations (comparing numbers)
• Like a calculator inside the computer
• Works very fast – millions of calculations per second
• Helps solve problems that need math

Logic Unit

• Makes decisions for the computer
• Compares things to see which is bigger or smaller
• Checks if things are true or false
• Like asking questions: “Is 5 bigger than 3?”
• Helps computer make choices

Storage Unit

• Stores information the computer is working on
• Keeps data temporarily while CPU works
• Like a notebook where you write things down
• Has different types:
  1. Registers – very fast, small storage
  2. Cache – medium speed storage
• Helps CPU remember what it’s doing

Exercise 2: Match the CPU parts:

• Does math calculations: _______
• Makes decisions: _______
• Stores information temporarily: _______
• Controls other parts: _______ (from yesterday)