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tms320f28335 epwm chopper 功能但是脉宽要200us怎么实现?

Other Parts Discussed in Thread: TMS320F28335

利用tms320f28335 epwm模块实现一个周期为20毫秒,占空比6.67毫秒,要实现类似于chopper模块的功能,但是脉宽要在200us左右的要怎么实现? 或者类似功能的其它实现方式麻烦各位大神提供一下.谢谢