What is SCM?
Single Chip Micyoco for short is SCM, SCM is an integrated in a chip on the integrity of computer systems. Although most of his functions integrated in a small chip, but it is a complete computer most of the required components: CPU, memory, internal and external bus system, most will have external storage. At the same time, such as integrated communications interface, timers, real-time clock, and other peripheral equipment. Now the most powerful SCM system can even dispose voice, images, networks, complex input-output system integration in a chip.
SCM also known as micro-controller (Microcontroler), because it was first used in the field of industrial control. SCM only by the CPU chip, developed from a dedicated processor. The first design concept is by and large number of peripheral devices integrated in a CPU chip, the computer system is smaller, more easily integrated into the complex and demanding that the control devices. INTEL the Z80 was the first such thinking in accordance with the design of the processor, henceforth, SCM and the development of dedicated processor is parted ways.
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SCM introduced:
SCM also called single-chip microcontroller, it is not completed a certain logic function of the chip, but to a computer system into a single chip. General stresses: a chip will become a computer. Its small size, light weight, cheap, for the study, application and development, he said. At the same time, learning to use computers to understand SCM is the principle and structure the best choice.
SCM also used internal and computer functions similar to the module, such as CPU, memory, parallel bus, and the role of the same hard drive memory, it is different parts of these properties are relatively weak our home computer a lot, but The price is low, generally not more than one USD to …… use it as some electrical control of a class is not very complicated work sufficient. We are using automatic washing machine drum, exhaust hood, VCD and so on inside the appliance can see its shadow! …… It is primarily controlled part of the core components.
It is an on-line real-time control computer, on-line is to control the scene, is the need to have a stronger anti-interference capabilities, lower cost, which is off-line and computer (such as home PC) The main difference.
