The FDE cycle

In this lesson, we will extend our knowledge of the components that make up the CPU by introducing the fetch-decode-execute cycle (FDE). We will observe a program running and will connect the parts of the CPU to their role in executing instructions.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Von Neumann architecture requires which parts of a computer program to be stored in memory?

1/4

Q2.Which part of the CPU controls the components and manages the instructions to be executed?

2/4

Q3.Which component carries data around the CPU?

3/4

Q4.What are the small memory locations located within the CPU called?

4/4

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Von Neumann architecture requires which parts of a computer program to be stored in memory?

1/4

Q2.Which part of the CPU controls the components and manages the instructions to be executed?

2/4

Q3.Which component carries data around the CPU?

3/4

Q4.What are the small memory locations located within the CPU called?

4/4

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

The FDE cycle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.During the fetch stage of the FDE cycle, where are the instructions fetched from?

1/5

Q2.What does a processor need to do to a binary instruction after it is fetched?

2/5

Q3.During the execute stage, which CPU component tells the other components what to do?

3/5

Q4.At which stage are results stored in the Accumulator?

4/5

Q5.What does the program counter do during the fetch stage?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

The FDE cycle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.During the fetch stage of the FDE cycle, where are the instructions fetched from?

1/5

Q2.What does a processor need to do to a binary instruction after it is fetched?

2/5

Q3.During the execute stage, which CPU component tells the other components what to do?

3/5

Q4.At which stage are results stored in the Accumulator?

4/5

Q5.What does the program counter do during the fetch stage?

5/5

Lesson summary: The FDE cycle

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Computer Systems
is:
Main memory

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