对FO40进行详细而深入的讲解，其中涉及到其具体的实现及编程。-FO40 right to conduct a detailed and in-depth explanations, which involves the realization of their specific and programming.

详细的叙述了f040的16位PWM软件设计思路-Detailed descr iption of the f040' s 16-bit PWM software design idea