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TMS320F28377S: PWM同步

Part Number: TMS320F28377S
Other Parts Discussed in Thread: C2000WARE

您好!

 我们使用28377s的PWM模块,PWM1和PWM2 需要同步,产生30khz频率;PWM3,PWM4,16khz独立运行。PWM5/6/7/8/9/10/11/12需要同步,产生18khz频率。

我们配置PWM1/3/4/5过零点触发sync信号,移相不使能;PWM2 /6/7/8/9/10/11/12接受同步信号,移向使能;

现在的问题是,一旦配置PWM1过零点触发sync,7/8/9这些都不输出PWM了 而是恒高电平或恒低电平。而把PWM1过零点触发sync关掉,PWM输出就正常了。或者把PWM1开关频率改为18khz,PWM输出也会正常。

请问下,如何同时配置PWM1/PWM2 30khz的PWM同步?

谢谢