Embedded Systems (Cambridge (CIE) IGCSE Computer Science)

Revision Note

James Woodhouse

Written by: James Woodhouse

Reviewed by: Lucy Kirkham

Embedded Systems

What is an embedded system?

  • An embedded system is a computer system which is used to perform a dedicated function, inside a larger mechanical unit

  • Examples of embedded systems include

    • Heating thermostats

    • Hospital equipment

    • Washing machines

    • Dishwashers

    • Coffee machines

    • Satellite navigation systems

    • Factory equipment

    • Security systems

    • Traffic lights

embedded systems

What are the properties of an embedded system?

  • They are small in size

  • They use less power than a general-purpose computer

  • They have a lower cost

Examiner Tips and Tricks

Always use key examples from the list above and don’t try to use different examples such as a fridge or kettle as these will not appear on mark schemes because although they have a single purpose, most fridges and kettles do not have a CPU.

Worked Example

1)    Tick two boxes below to show which are an example of an embedded system

[2]        

 

Is it an example of an embedded system

Laptop

 

Washing Machine

 

Mobile Phone

 

Car Engine Management System

 

2)    Justify your choice to question 1

[2]

Answers

1)    Tick two boxes below to show which are an example of an embedded system.  [2]

 

Is it an example of an embedded system

Laptop

 

Washing Machine

Mobile Phone

 

Car Engine Management System


2)    Justify your choice to question 1 [2]

Any two of:

  • A washing machine and car engine management system are not general-purpose computers [1]

  • A washing machine and car engine management system have a single purpose and are both housed inside a larger mechanical unit [1]

  • A washing machine and car engine management system have a microprocessor [1]

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James Woodhouse

Author: James Woodhouse

Expertise: Computer Science

James graduated from the University of Sunderland with a degree in ICT and Computing education. He has over 14 years of experience both teaching and leading in Computer Science, specialising in teaching GCSE and A-level. James has held various leadership roles, including Head of Computer Science and coordinator positions for Key Stage 3 and Key Stage 4. James has a keen interest in networking security and technologies aimed at preventing security breaches.

Lucy Kirkham

Author: Lucy Kirkham

Expertise: Head of STEM

Lucy has been a passionate Maths teacher for over 12 years, teaching maths across the UK and abroad helping to engage, interest and develop confidence in the subject at all levels.Working as a Head of Department and then Director of Maths, Lucy has advised schools and academy trusts in both Scotland and the East Midlands, where her role was to support and coach teachers to improve Maths teaching for all.