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Tuesday, November 29, 2011

What are the components of an embedded computer

    An embedded board is a computer system designed for specific control functions within a larger system. embedded board control many devices in common use today as they contain processing cores that are typically either microcontrollers or Digital Signal Processors The key characteristic, however, is being dedicated to handle a particular task. They may require very powerful processors and extensive communication. 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 the reliability and performance. Some embedded systems are mass-produced, benefiting from economies of scale. Physically, embedded systems range from portable devices such as digital watches, mp3, to large stationary installations like traffic lights, factory controllers or the systems controlling nuclear power plants. Complexity varies from low, with a single microcontroller chip to very high with multiple units, etc. In general, "embedded system" is not a strictly definable term, as most systems have some element of extensibility or programmability. For example, embedded computer share some elements with embedded systems such as the operating systems and microprocessors that power them, but they allow different applications to be loaded and peripherals to be connected. Moreover, even systems that do not expose programmability as a primary feature generally need to support software updates. On a continuum from "general purpose" to "embedded", large application systems will have subcomponents at most points even if the system as a whole is "designed to perform one or a few dedicated functions", and is thus appropriate to call "embedded". Embedded systems are especially suited for use in transportation, fire safety, safety and security, medical applications and life critical systems as these systems can be isolated from hacking and thus be more reliable. For fire safety, the systems can be designed to have greater ability to handle higher temperatures and continue to operate. In dealing with security, the embedded systems can be self-sufficient and be able to deal with cut electrical and communication systems.

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