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F28M35的PWM trip-zone问题

您好:

     我想请教下PWM的TZ(trip-zone)是怎么用的,6个TZ分别接到片子上的哪6个IO口的?这一部分看手册不是很明白。

谢谢您的指导。

  • 以下内容是trip zone模块的功能,GPIO12到GPIO17和6个TZ引脚是复用的。

    Trip inputs TZ1 to TZ6 can be flexibly mapped to any ePWM module.
    • Upon a fault condition, outputs EPWMxA and EPWMxB can be forced to one of the following:
    – High
    – Low
    – High-impedance
    – No action taken
    • Support for one-shot trip (OSHT) for major short circuits or over-current conditions.
    • Support for cycle-by-cycle tripping (CBC) for current limiting operation.
    • Each trip-zone input pin can be allocated to either one-shot or cycle-by-cycle operation.
    • Interrupt generation is possible on any trip-zone pin .
    • Software-forced tripping is also supported.
    • The trip-zone submodule can be fully bypassed if it is not required.

  • 谢谢。那datasheet中下面这段话怎么理解呢?

    TZ1–6 (Trip Zone)inputs come from GPTRIP1–3 (from GPIO_MUX1),EQEPERR(from the eQEPperipheral),CLOCKFAIL(from M3CLOCKS),andEMUSTOP(from the C28x CPU).

  • 这段话的意思是TZ产生的源可以6个,三个是GPIO外部输入电平,EQEP, 时钟丢失和CPU指令,对于用户主要是前四个可以自行配制使能。

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