555可调pwm发生器，用单片机控制，89C51-555 Adjustable pwm generator, with MCU control, 89C51

飞思卡尔的芯片编程，基于其内置的PWM发生器，通过调节其占空比，达到输出音乐效果-Freescale s chip programming, based on its built-in PWM generator, by adjusting the duty cycle reaches the output sound effects

单相PWM逆变器直流-交流mtalab模型,PWM发生器的内涵,适用于逆变器研究的学生 -Single-phase PWM inverter dc- ac mtalab model, the connotation of the PWM generator, is suitable for inverter for research students