• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 98 subscribers
  • Views 548 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.

USB interface with DM3730 from LAN9514

Dave Pulvermacher
Intellectual 870 points
Other Parts Discussed in Thread: DM3730, TPS65950

I am currently using a Beagleboard-like design on a custom PCB.  I am NOT using any USB ports, just an ethernet port.  The Beagleboard design calls for the LAN9514 to handle communications from multiple USB ports and the ethernet port.  It then feeds the upstream data THRU an USB3320 USB transceiver into the DM3730.  

The Beagleboard also uses the ULPI port on the TPS65950 to handle a separate USB OTG port.  

My question is thus:  If I do not want to use the USB3320 can I route the upstream data from the LAN9514 directly into the ULPI port on the TPS65950??  Again, I am not using any USB ports in my design.  

  • 0
    TI__Guru 64540 points

    Dave Pulvermacher said:

    My question is thus:  If I do not want to use the USB3320 can I route the upstream data from the LAN9514 directly into the ULPI port on the TPS65950??  Again, I am not using any USB ports in my design.  

    I assume you meant to ask, "can I route the upstream USB from the LAN9514 into the OTG PHY in the TPS65950".

    Electrically, yes, you can do what I just mentioned above.  The bigger question is on software support for this configuration.  The Beagleboard, as you noted, uses a different USB Host port on the DM3730 to ultimately connect to the LAN9514 which is the EHCI USB controller.  The software driver support will be associated with the Beagleboard configuration.