Often they constitute subsystems of other machines like avionics in aircraft and astrionics in spacecraft.
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Some embedded systems are mass-produced, benefiting from economies of scale.Įmbedded systems range in size from portable personal devices such as digital watches and MP3 players to bigger machines like home appliances, industrial assembly lines, robots, transport vehicles, traffic light controllers, and medical imaging systems. Since the embedded system is dedicated to specific tasks, design engineers can optimize it to reduce the size and cost of the product and increase its reliability and performance. A common standard class of dedicated processors is the digital signal processor (DSP). In either case, the processor(s) used may be types ranging from general purpose to those specialized in a certain class of computations, or even custom designed for the application at hand. microprocessors with integrated memory and peripheral interfaces), but ordinary microprocessors (using external chips for memory and peripheral interface circuits) are also common, especially in more complex systems. Modern embedded systems are often based on microcontrollers (i.e. In 2009, it was estimated that ninety-eight percent of all microprocessors manufactured were used in embedded systems.
Embedded systems control many devices in common use today. It is embedded as part of a complete device often including electrical or electronic hardware and mechanical parts.īecause an embedded system typically controls physical operations of the machine that it is embedded within, it often has real-time computing constraints. An embedded system on a plug-in card with processor, memory, power supply, and external interfacesĪn embedded system is a computer system-a combination of a computer processor, computer memory, and input/output peripheral devices-that has a dedicated function within a larger mechanical or electronic system.
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