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TMS320F28379D: EPWM synchronization question

Huihuang Chen
Expert 4010 points
Part Number: TMS320F28379D

Hi Champ,

From datasheet, there have following description.

The ePWM and eCAP synchronization chain on the device provides flexibility in partitioning the ePWM

and eCAP modules between CPU1 and CPU2 and allows localized synchronization within the modules

belonging to the same CPU.

May I know if ePWM1-3 assign to CPU1  and ePWM4-6 assign to CPU2 , whether  ePWM4-6 could synchronization with ePWM1?

  • 0
    TI__Mastermind 23490 points

    Hi Huihuang,

    The ePWM sync in/out paths are HW paths that exist regardless of which CPU owns the ePWM, so you can sync between modules owned by different CPUs.

    Also note that 'TBCLKSYNC' is used to start the time base counter for all epwm modules belonging to the same CPU-subsystem, but 'GTBCLKSYNC' is used to start the time base counter for all modules in both CPU-subsystems. 

    Best Regards,

    Marlyn

  • 0 in reply to Marlyn Rosales Castaneda20
    TI__Expert 4010 points

    Hi Marlyh,

    If so why we add below description in datasheet?  based on following description , my understanding is just the ePWM module belong to the same CPU can be synchronization .

    The ePWM and eCAP synchronization chain on the device provides flexibility in partitioning the ePWM

    and eCAP modules between CPU1 and CPU2 and allows localized synchronization within the modules

    belonging to the same CPU.

  • 0 in reply to Huihuang Chen
    TI__Mastermind 23490 points

    Hi Huihuang,

    I can see how that second part may be a bit confusing. I'll submit a request to get this changed in the datasheet.

    Best Regards,

    Marlyn