【正文】 t 6channel output, can produce threephase PWM AC voltage, and internal control with deadzone function. Of particular note are: It is now some have adopted the socalled singlechip trinuclear (TrCore) structure. This is a systemlevel chips built on the (System on a chip) on the structure of the concept. This singlechip consists of three core ponents: a microcontroller and the DSP core, a data and program memory is nuclear and the last one is the external application specific integrated circuit (ASIC). The most important feature of this singlechip is the DSP and 3 microcontroller at the same time do so in a chip. Although the structure definition, DSP is a type of singlechip, but its role is mainly seen in the highspeed puting and special treatment as above, such as fast Fourier transform. It bines traditional singlechip integrated singlechip greatly enhanced functionality. This is the singlechip, one of the greatest progress. This singlechip microputer has the most typical Infineon39。s MB89850 series of panies, MB89860 series。 Motorola39。s exclusive singlechip microputer. A certain period of time, this situation will continue to be upheld, there will not be a singlechip monopoly domination, taking the plementary interdependence, plementarity and mon development. Second the technical development of digital singlechip The number of singlechip technology is reflected in the internal structure, power consumption, as well as the external voltage level on the manufacturing process. In these areas, more typically describes the number of singlechip level. At the moment, users need more and more singlechip, but getting higher and higher requirements. The following four areas on which the technological progress that the situation of singlechip microputer. 1, the internal structure of the progress Singlechip integrated inhouse has been an increasing number of parts, these parts include monly used circuits, such as: timers, parators, A / D converter, D / A converters, serial munication interface, Watchdog circuit , LCD controller. Some singlechip control work in order to constitute or form a local work, the internal local area work control module contains the CAN. For example, Infineon39。s PIC and reduced instruction set (RISC) has a strong development momentum of China Taiwan HOLTEK singlechip panies in recent years, increasing production, with its high quality lowcost advantages, to occupy a certain market share. MOTOROLA addition to the pany39。s products and China Taiwan39。 1 THE DEVELOPMENT OF SINGLECHIP First the development trend of singlechip It can be said now is a singlechip opinions of the period, the world39。s major chip manufacturing panies have introduced their own singlechip, from the 8, 1632, just to name a few, everything, it is patible with mainstream C51 series of , there are not patible, but they own each other into each other, for SCM applications world wide. Throughout the development process of singlechip, you can indicate the development trend of singlechip, generally are: 1. Lowpower CMOS technology MCS51 series of 8031 introduced the power consumption of 630mW, and now widespread in the singlechip 100mW or so, with the growing demand for lowpower singlechip, and now all the basic singlechip manufacturers are use of CMOS (plementary metal oxide semiconductor process). As the 80C51 on the use of HMOS (high density metal oxide semiconductor process) and CHMOS (highdensity plementary metal oxide semiconductor process). Although the CMOS low power consumption, but because of its physical characteristics to determine its speed is not high enough, and then CHMOS with highspeed and low power consumption characteristics of these features, it is more suitable in low power consumption, as batterypowered applications . Therefore, the process for some time to e will be the main way to develop singlechip 2. Of microchip Now are generally in conventional singlechip will be t