摘　要:介绍采用89C52单片机实现高可靠性低成本的反应式步进电机变细分驱动的方法，包括如何利用89C52单片机控制的步进电机恒转矩、斩波恒流、细分驱动方案及技术要点。

-Abstract : introduced, 89 tents MCU high reliability of low-cost reactive breakdown stepper motor-driven change, including how to use 89 tents MCU control of the stepper motor torque constant, constant current chopper, MICROSTEPPONG programs and technical points.