What Is an Embedded System?
Part of Embedded Systems — GCSE Computer Science
This key facts covers What Is an Embedded System? within Embedded Systems for GCSE Computer Science. Revise Embedded Systems in Systems Architecture for GCSE Computer Science with 15 exam-style questions and 12 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 3 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 7
Practice
15 questions
Recall
12 flashcards
What Is an Embedded System?
Definition:
An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system. It's built to do one specific job, not to be a general-purpose computer.
Key Characteristics:
- Dedicated function: Designed for ONE specific task (e.g., washing clothes, controlling traffic lights)
- Integrated: Built into the device it controls (you can't remove it and use it elsewhere)
- Limited user interface: Usually just a few buttons/LEDs, not a full keyboard and screen
- Real-time operation: Must respond instantly (e.g., car airbag system must react in milliseconds)
- Reliable and stable: Must work 24/7 without crashing or needing updates
Components of an Embedded System:
- Microcontroller/Microprocessor: A small, simple CPU designed for specific tasks
- Memory: Usually ROM (for the fixed program) and a small amount of RAM
- Input sensors: Temperature sensors, buttons, motion detectors, etc.
- Output actuators: Motors, LEDs, displays, heating elements, etc.
- Power supply: Often battery-powered or low-power