AQA A’Level SLR17 Fetch decode execute cycle
About this video
AQA Specification Reference
AS Level 3.7.3.2
A Level 4.7.3.2
In this video we take a closer look at how a CPU actually works by following the stages of the Fetch-Decode-Execute cycle and seeing the effect it has on the various registers.
Key question:
- How does a CPU work?
00:00 Fetch-decode-execute cycle
00:13 Intro
00:18 Fetch-decode-execute cycle
00:33 Fetch stage
02:16 Decode stage
02:43 Execute stage
04:02 Program branching
06:28 Key question
06:37 Answer to the question "What does this program do?"
08:22 Outro
Last updated: 05.06.25
