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DP83TD510E-EVM: Trouble with USB-2-MDIO connection

Robert Cagle
Prodigy 10 points
Part Number: DP83TD510E-EVM
Other Parts Discussed in Thread: USB-2-MDIO

I'm trying to power DP83TD510 and connected DP83822 with USB from PC or USB charger. I installed J9 jumper (USB power), and left all other jumpers as default (EXT pins left disconnected).

LD1,LD2,LD4,D3 LEDs come on when powered (Not LD3). LED_0 on from DP83822. No response from USB-2-MDIO software (no new COM port shows up), no link LED on 100BASE-TX port when cable connected.

Installed ti_msp430driver_setup_1.0.1.1-windows on Windows 10 laptop (Thinkpad T480), but do not see any new device appearing in windows when eval board is powered.

  • 0
    TI__Genius 17345 points

    Hi Robert,

    Did you change the R24 resistor from 22 ohms to 0 ohms? Please refer to session 2.3 Quick setup in the updated EVM user guide in the document below. The most updated EVM user guide will be publish later this week.

    Updated 510EVM userguide.pdf

    --

    Regards,

    Hillman Lin

  • 0 in reply to Hillman Lin
    Prodigy 10 points

    No, I want to power from USB so I did not change anything other than putting a jumper on J9.

    I followed section 3.1.3 "USB Power Supply Option", which does not state any resistor changes (even in new document version). I think Quick setup in 2.3 refers to using external 5-36v power, which I  am not using right now.

    Note that section 2.3 conflicts with the description of Figure 2.6, which says to only install J9 if using USB power.

    I can switch to an external power supply if necessary. I would think since the board does not come with an external power supply it would have been more useful to come configured for USB power by default.

  • +1 in reply to Robert Cagle
    TI__Genius 17345 points

    Hi Robert,

    Sorry for the confusion. We will work on this internally and update the user guide to TI.com. Meanwhile, please do change the R24 resistors to 0 ohms and remove the LED_0 jumper [J20] for the setup and see if you are able to work with the USB.

    --

    Regards,

    Hillman Lin