CPU Architecture Diagram

Part of CPU Architecture · Section 6 of 8

DiagramUnit: 3.4 Computer SystemsGCSE
CPU Control Unit Fetches & Decodes Instructions ALU Arithmetic & Logic Operations PC Program MAR Address MDR Data ACC Results Registers (Fast Temporary Storage) RAM Main Memory (Instructions & Data) Address Bus (WHERE → one-way) Data Bus (WHAT ↔ two-way) Control Bus (HOW ↔ two-way)
● Address Bus (one-way to memory)   ● Data Bus (two-way)   ● Control Bus (two-way)

This diagram covers CPU Architecture Diagram within CPU Architecture for GCSE Computer Science. Revise CPU Architecture in 3.4 Computer Systems for GCSE Computer Science with 16 exam-style questions and 12 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 6 of 8 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Practice questions for CPU Architecture

Which component of the CPU carries out arithmetic and logical operations?

  • A. Control Unit
  • B. Cache
  • C. Arithmetic Logic Unit (ALU)
  • D. Program Counter
1 markfoundation

Name three main components of the CPU and state the purpose of each.

3 marksstandard

Quick recall flashcards

What does ALU stand for?
Arithmetic Logic Unit
What does CPU stand for?
Central Processing Unit

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