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TUSB1046 USB Type-C Enabler EVM

Other Parts Discussed in Thread: TPS65982

We just acquired the TUSB1046 USB Type-C Enabler EVM board, and are having difficulties getting a valid DP signal. Our use case scenario is the one explained on page 2 of the EVM users guide, except our USB dongle is a DisplayPort only dongle:

The ideal setting would be 2 DP lanes and USB3.1 lanes. 

A bit more about our setup:

  • For the DP source we have tried a standard DELL desktop PC and an Intel NUC. 
  • For power supply we've tried USB powered or with power supply.
  • For DP sink we have a monitor connected to the USB Type-C dongle. We're using a monitor with a standard DP input.

My best guess would be to ensure JMP7 is set to pull down to enable GPIO Mode. The SW1 would be set to 0111 to enable 2-lane DP mode with flip enabled. SW2 is set to all 0? However this doesn't result in a valid signal to the DP monitor.

We have now tried several other permutations of setting switches and jumpers, but have been unable to get a valid DP signal out. Could someone inform me, what the correct switch  and jumper settings should be to accomplish this scenario? Or am I missing something basic?

Any help would be greatly appreciated.

  • Hello Dennis,

       First of all, you must ensure that the DP source is transmitting valid 2-lanes DP video signal, then the TUSB1046 must be configured in GPIO mode (done), and make sure that the TPS65982 has the appropriate firmware. Here you go the firmware for the TPS65982, you can use the connector J8 to program the TPS device.

       The last step is to configure the EQ levels to an appropriate setting so the TUSB1046 compensates the channel loss.

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/138/enabler_5F00_firmware.hex

    Regards,

    Diego.