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TMS320F280049: Is HRPWM still kept when I route like PWM1A to another GPIO with X-BAR?

Howard Zou
Genius 12365 points
Part Number: TMS320F280049


Hi,

if I set PWM1A to be HRPWM, and then route it to another GPIO pin, will the HR portion be kept or discarded?

Besides, what's the delay time in such a situation? What's the delay time for input X-BAR, EPWM X-BAR and output X-BAR?

  • 0
    TI__Mastermind 24095 points

    Hi,


    Howard Zou said:

    f I set PWM1A to be HRPWM, and then route it to another GPIO pin, will the HR portion be kept or discarded?

    Yes, HRPWM will be retained.


    Howard Zou said:
    Besides, what's the delay time in such a situation?

    It doesn't effect the HRPWM resolution. There will be some offset delay based on the pin location chosen due to signal propagation. But the period and duty will still be with the same resolution, including HR.


    Howard Zou said:
    What's the delay time for input X-BAR, EPWM X-BAR and output X-BAR?

    These delays could be multiple system clock cycles (1 or more) and vary depending again on the source and destination.

  • 0 in reply to Subrahmanya
    TI__Genius 12365 points

    Hi,

    thank you.

    These delays could be multiple system clock cycles (1 or more) and vary depending again on the source and destination.

    So we don't have a guide to show exactly what's the delay time, right? Then do we have a total maximum delay to be ensured when routing signal from one pin(or any internal signal that is not shown on a pin) to another pin that could be observed?

  • 0 in reply to Howard Zou
    TI__Mastermind 24095 points

    Hi,

    No. This value is not specified in the data sheet. But, as I said above, the HRPWM resolution will not be lost. There is only additional path delay due to XBars.