embedded-systems

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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

Benefits and drawbacks of embedded systems

Benefits	Drawbacks
Small and compact – easy to fit into dedicated devices	Limited functionality – only performs specific tasks
Low power consumption – efficient and cost-effective	Hard to upgrade or repair – often built into the device
Fast and reliable – designed for quick, repetitive tasks	Limited memory and processing power
Cheaper to produce – uses minimal hardware	Not flexible – can’t easily be reprogrammed for other tasks
Works in real-time – ideal for time-sensitive operations (e.g. alarms)	May be less secure – limited protection if connected to other systems

Worked Example

A car has several features. One feature is a lane detection system. This system monitors the lines on either side of the lane. If the car gets too close to one line, the system automatically moves the car away from the line.

Explain why the lane detection system is an example of an embedded system. [2]

Answer

The lane detection system is built into / integrated into the car [1 mark]
The lane detection system only performs one task [1 mark]
The lane detection system is not easily changed/updated by the car owner [1 mark]

Computer-science_A-level_Cie

embedded-systems

Embedded systems

What is an embedded system?

Benefits and drawbacks of embedded systems

Worked Example

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