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Embedded Systems ((An embedded system performs a single task within a…
Embedded Systems
An embedded system performs a single task within a larger piece of equipment. For example a DVD player will have an embedded computer to handle all of the hardware and input/output. You don't need to install an entire operating system to get your DVDs to play.
Embedded computers control a system, but often require additional hardware.
For example, it may take in inputs from specialised sensors. The computer processes those inputs, and then produces an output that requires some physical action, such as spinning up or ejecting a DVD.
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Once the actuators have carried out their task, they send data back to the embedded computer, which decides what to do next. This is called 'negative feedback'.
Embedded computers are often built as a single unit, with everything mounted on a printed circuit board. RAM, ROM, CPU, Clock and connectors are all pre-installed.
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An embedded system is a combination of computer hardware and software, either fixed in capability or programmable, designed for a specific function or functions within a larger system.
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