The Embedded System is a microprocessor based system that is embedded as a subsystem, in a larger system (which may or may not be a computer system).
Embedded systems contain processing cores that are typically either microcontrollers or digital signal processors (DSP) .Embedded systems control many devices in common use today. A specialized computer system that is part of a larger system or machine, For Example:- Air traffic control systems may usefully be viewed as embedded, even though they involve mainframe computers and dedicated regional and national networks between airports and radar sites.
Most of the embedded systems have real time constraints, but there may be ES which are not hard RTS (for example off line Palm tops). Embedded Systems are not GPS; they are designed for dedicated applications with specific interfaces with the sphere of control. There may be RTS which are not embedded (e.g. Separate Process Control Computers in a network.
Embedded System is a work in application:-
• Automotive electronics
• Aircraft electronics
• Trains
• Telecommunication
Characteristics
1. Embedded systems are designed to do some specific task, rather than be a general-purpose computer for multiple tasks. Some also have real-time performance constraints that must be met, for reasons such as safety and usability; others may have low or no performance requirements, allowing the system hardware to be simplified to reduce costs.
2. Embedded systems are not always standalone devices. Many embedded systems consist of small, computerized parts within a larger device that serves a more general purpose. For example, the features an embedded system for tuning the strings, but the overall purpose of the Robot Guitar is, of course, to play music.Similarly, an embedded system in an automobile provides a specific function as a subsystem of the car itself.
e-con Systems eSOM270 & eSOM300 Computer on Modules
