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TMS320F28375D: Can INPUT4-6 be connected to the trip zone via ePWM X-BAR?

K.Z
Expert 2470 points
Part Number: TMS320F28375D

Tool/software:

Hi All,

X-bar INPUT1~3 are connected to the TZ of the ePWM module.
I cannot tell from the TRM whether INPUT4-6 can be used as a trip zone via ePWM X-BAR.
Please let me know if there is a register setting method or sample code.
According to Figure 9-1, INPUT1 to 6 can be connected to the ePWM X-bar, but can INPUT 7 to 12 also be connected to the ePWM X-bar?

Best Regards,

Ito

  • 0
    TI__Mastermind 23013 points

    Hi Ito,

    Only INPUTXBAR.INPUT[1:2:3] are conected to TZ[1:2:3] respectfully.

    INPUTXBAR.INPUT[4:5:6] are connected to the PWMXBAR and can then be further routed to TRIP[4:12]. INPUTXBAR.INPUT[6] also has a dedcated route to the ePWM Modules without using the PWMXBAR connection.

    My initial thought is that it may be possible to allow InputXBAR.[7-12] to essentially "Pass-through" the ECAP and back to the PWMXBAR, but I don't think this use-case has ever been tested.

    But, as you've noted there is no direct hardware connection from these INPUTXBAR options to the ePWMX-BAR.

    Best Regards,

    Zackary Fleenor

  • 0 in reply to Fleenor
    Expert 2470 points

    Hi Fleenor,

    Fleenor said:
    INPUTXBAR.INPUT[4:5:6] are connected to the PWMXBAR and can then be further routed to TRIP[4:12]. INPUTXBAR.INPUT[6] also has a dedcated route to the ePWM Modules without using the PWMXBAR connection.

    I understand that INPUT[4:5:6] can be connected to ePWM.
    Can INPUT[4:5:6] be connected to TZ?

    If this is possible, please tell me how to set it up.

    Best Regards,

    Ito

  • +1 in reply to K.Z
    TI__Mastermind 23013 points

    Hey Ito,

    Unfortunately, due to the same reasons you've already evaluated, this is not possible with the hardware implementation:

    TZ[1:3] can only come from INPUTXBAR[1:3].

    Best Regards,

    Zackary Fleenor