29-07-2017, 01:05 PM
An embedded device can range from a relatively simple product to ex. A toaster
Complex mission-critical applications such as those used in avionics. A typical built-in device will have both hardware and software components. The hardware could be micro components such as microprocessor or built-in microcontroller. The microcontroller is relatively small, has a chip memory, an I / O controller and other compatible modules to perform processing and control tasks. The software consists of applications that perform dedicated tasks and can be run on the operating system in real time, which will be explained later in this unit. The Embedded System can be an independent system or part of a large system. It is a specialized computer system, but not a general purpose workstation such as a desk or computer. This type of system is housed in a single microprocessor board with programs that are stored in ROM (Read Only Memory). The embedded system is generally a compact, portable and mass-produced electronic device. In the early days, embedded systems were designed using microprocessors like 8085. But today, we are using a wide range of processors from other manufacturers. Before we want to base an embedded system, we should see a wide range of its applications. In fact, almost all modern electronic devices use some kind of embedded system technology inside them and we always find such devices: DVD players, air conditioners, printers, assistance machines, handheld, digital camera, ATM , Let's look at some examples of the embedded system in section 1. Now is the time to give an adequate definition.
Definition: "Embedded systems are devices that are used to control, supervise or assist the operation of a machine, machinery or plant." The term "control" defines the main function of the embedded system because its purpose is to control an aspect of a physical system such as pressure, temperature and so on. The term "monitor" also defines the progress of activities.