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DS90UB953A-Q1: Internal regulator power on VDDDRV,VDDPLL,VDDD.

Harry Shin1
Expert 6790 points
Part Number: DS90UB953A-Q1

Hello Team,

My customer is asking if there is target regulator power for VDDDRV,VDDPLL,VDDD.

they are considering if they can use those regulator output for normal status criteria.

if customer cannot use this as criteria, Could you pls help explain this as well??

Thanks 

  • 0
    TI__Expert 6790 points

    its pin name should be VDDD_CAP, VDDDRV_CAP, VDDPLL_CAP where customer will measure.

  • 0 in reply to Harry Shin1
    TI__Mastermind 18755 points

    Hi Harry,

    I think this would just tell you the status of the internal regulator and not the device as a whole.  What kind of status information do they want from the device?  Just an overall system status on a pin could be the LOCK pin right?  this would tell you that there is something wrong at wither the ser side or des side.

    Regards,

    Nick

  • 0 in reply to Nicholas Darash
    TI__Expert 6790 points

    Hi Nick,

    Thanks for answer,

    Yes, LG  will use LOCK to detect connection status.

    and they also wants to check  that those pin output could be used to determine if chip is normal or not.(just DES powered up condition)

    I also thought this is not good idea. but I want to inform rational reason why this is not good idea.

    So I need your help to answer properly.

    Could you pls help on this??

    Thanks  

  • 0 in reply to Harry Shin1
    TI__Mastermind 18755 points

    Hi Harry,

    I would say its not a good idea to rely on this since there may be a scenario where something is wrong with the device but it is still powered and that is all you would be able to tell.

    I think something they could try would be to use one of the GPIOs set to a constant value of 1 and they could monitor that.  If something went wrong internally I think it would be likely that the GPIO would reset.  With that said I don't have an overall way to say for certain everything is okay.

    Regards,

    Nick