• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 32 subscribers
  • Views 202 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TUSB8044: SuperSpeed USB connectivity is disabled for slow devices

Mark Gelfgat
Prodigy 70 points
Part Number: TUSB8044

Hi

  Please clarify the statement from  TUSB8044 datasheet:

  "When the upstream port is connected to an electrical environment that only supports high-speed or full-speed/low-speed connections, SuperSpeed USB connectivity is disabled on the downstream ports"

 

  The disabling Super Speed for all 4 -ports of the hub? That means one slow device lowers the speed for all the others? 

 

BR,

Mark.

  • 0
    TI__Guru 60865 points

    HI Mark,

    USB 3.0 traffic and USB 2.0 traffic run on separate signals, there is no conversion between the two buses.  If the upstream port of the hub is connected to a host that supports USB 2.0 only, everything connected downstream to the hub runs at USB 2.0 speeds.  If the upstream port of the hub is connected to a host at both USB 3.0 and USB 2.0 speeds, any speed device can be attached to a downstream port of the hub without impacting the other downstream ports.

    Regards,

    JMMN