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PDPINTA used in TMS320F28379 DSP

Yue Li2
Intellectual 640 points

Other Parts Discussed in Thread: TMS320F2811

I once used TMS320F2811 where there is pined "/PDPINTA". Once this pin was driven low, some actions such as shutting down PWM (driven to high-impedance state)  took place immediately.


Now, I am using F28379D, with X-Bar, we can use some GPIOs as external interrupts. However, I didn't find any pin specified with the function of /PDPINTA.

Does F28379D has such function pin?


Thanks

  • 0
    TI__Guru 57255 points

    Hi Yue,

    In our newer devices, the shutdown/trip functionality is handled by the Trip Zone submodule of the ePWM peripheral.  This submodule will force chosen PWM outputs to Lo, Hi, or Hi-Z based on the configuration of registers.

    ===

    The F28379D has 6 digital inputs which can be brought into the ePWM peripheral (INPUTXBAR1 - 6) as seen in the "Input X-BAR" figure (Figure 8-1 of the current TRM).   The F28379D also has the ability for analog inputs to go into an internal analog comparator and then trip the PWMs.

    The TRM documents the paths in various chapters, but I'll provide a summary below:

    For digital paths via TZ1 through TZ3 :
    Outside world -> INPUTXBAR -> ePWM's Trip Zone (TZ) submodule

    For digital paths through the ePWM XBAR:
    Outside world -> INPUTXBAR -> ePWM XBAR -> ePWM Digital Compare (DC) submodule -> ePWM Trip Zone (TZ) submodule

    For the comparator path:
    Outside world -> Analog Comparators -> ePWM XBAR -> ePWM Digital Compare (DC) submodule -> ePWM Trip Zone (TZ) submodule


    Hopefully this helps!


    Thank you,
    Brett