Abstrst:
With the SCM technology and control technology improvement, 16-bit microcontrollers has been widely used in the field and civilian. One, INTEL 8 XC196MC company's 16-bit microcontroller series is the most widely used kind. 8XC196MC SCM collection of INTEL16-bit microcontrollers all the characteristics of the 196 series microcontroller in the most powerful one, its three-phase wave generator, is very suitable for AC motor control, can easily produce three pairs Symmetrical SPWM waveform. At the same time, it has a high-performance, full functionality, ease of use, and other characteristics of users, especially high-speed processing capability of the AC and the application-specific, so it will definitely in our wider application of intelligent control of the area, but also will bring considerable economic benefits . The speed control system using Intel chips exclusively for motor control and design of high-performance microprocessor in a 80 C196MC, in the use of the processor chip waveform generator WFG direct use of software generated three-phase SPWM Wave. This paper studies include: a detailed exposition on 80 CI96MC SPWM control of the MCU algorithm composition, the working principle of wave generator, the parameters of calculation and related registers, dead time, and other settings. On this basis, the complete waveform generation of software design, and to prepare the full process. Key words: Three-phase waveform generator Sine wave PWM Frequency