• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 347 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB2046B

Aaron Spaete
Expert 4527 points

Team,

My customer will be using this device in self powered hub and self-powered downstream device mode.  One of the downstream devices goes into a low power mode when its USB bus is "idle".   If they are not using power management, can they make this device go idle by asserting it's overcurrent input?

Thanks in advance!

  • 0
    TI__Guru 60870 points

    Hi Aaron,

    USB is a host driven bus, so if implemented per the USB specification, only the host can suspend (low power mode) downstream devices.  I definitely wouldn't recommend using the overcurrent input to manage power since any overcurrent event is reported back to the host which then disables the port power.  The host then has to re-enable power and re-enumerate the device once the overcurrent event ends.

    Regards,

    Julie Nirchi