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DRV8320: About fault assert in SPI devices.

Kengo.Y
Guru 11255 points
Part Number: DRV8320

Hi team.

I'd like to know about fault assert in SPI devices.

When the UVLO happens, 

1, Will fault status continue to be recorded?(Even if the power is turned on and off.)

2, CLR_FLT is only use for Latched type?

    It mean is UVLO is auto recovery, so UVLO's fault assert don't need CLR_FLT.

Sincerely.

Kengo.

  • 0
    TI__Guru 65460 points

    Kengo,

    The FAULTs will continue to report as long as DVDD is still powered up which means the digital core of the DRV is still active. If the power is removed or too low for DVDD to operate then faults will not be reported.

    Yes CLR_FLT is only used for the non-auto-recovery FAULTS such as overcurrent.

    Regards,

    -Adam

  • 0 in reply to Adam Sidelsky
    Guru 11255 points

    Adam.

    Thank you for your response.

    I have a unclear thing that I do not know.

    According to datasheet, the UVLO need to use CLR_FLT bit.

    However the UVLO is auto-recovery.

    Sincerely.

    Kengo.

  • 0 in reply to Kengo.Y
    TI__Guru 65460 points

    Kengo,

    Sorry for the delay.

    The fault will Automatically clear if the power supply no longer has the UVLO condition OR the fault can be cleared if the UVLO persists using the CLR_FLT bit.

    Regards,

    -Adam