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SCM development history

1.The general situation of list slice machine

The single chip microcomputer referred to as SCM, is typical of embedded micro- controller (SCM Unit), the commonly used letters of the abbreviation MCU MCU, it was first used in the field of industrial control. Master SCM technology to enable more people in the industry, students, enthusiasts, product developers, and the question arose due to the extensive application of SCM in the field of industrial control, SCM development board, the more famous such as e- DZR - 01A SCM development board. SCM evolved by the only dedicated processor CPU chip. The first design concept by a large number of peripherals and CPU integrated in a single chip, the computer system is smaller, and more easily integrated into complex and require strict control equipment on the volume. INTEL Z80 is the first processor designed in accordance with this idea, since then, the development of SCM and dedicated processor has grown apart.

Early SCM are 8 or 4. One of the most successful is the INTEL 8031, because the simple and reliable performance good a lot of praise. Later in 8031 on the development of MCS51 series SCM system. Is still in wide use of SCM system based on this system until now. Began with the industrial control area requires improvement of a 16-bit SCM, but not ideal because the price has not been a very wide range of applications. The 1990s, consumer electronics, SCM technology has been a huge increase. With the INTEL The i960 series, especially the ARM series of widely used 32- bit SCM quickly replaced the 16-bit single - chip high-end status, and enter the mainstream market. Traditional 8-bit MCU performance has also been a rapid increase processing capacity than a few times in the 1980s. At present, high-end 32-bit SCM clocked more than 300MHz, performance, catching up with a dedicated processor in the mid-1990s, while the ordinary model prices drop to $ 1, the most high-end model is only $ 10. Contemporary SCM system is no longer only in the bare metal environment to develop and use a large number of dedicated embedded operating system is widely used in a full range of SCM. As handheld computers and mobile phones core processing high-end SCM can even use a dedicated Windows and Linux operating systems.

The SCM is more than a dedicated processor for embedded systems, so it has been up to the application. In fact SCM is the world’s largest number of computer. Of modern human life in almost every electronic and mechanical products will be integrated SCM. Mobile phone, telephone, calculator, household appliances, electronic toys, handheld computers, as well as mouse and other

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