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TPS65982: internal mux config for USB pass thru

O'Mellin
Expert 6035 points
Part Number: TPS65982

Team,

I struggle in the datasheet, the TRM, or the config tool to find out how to program the internal mux to make sure the USB data actually goes through the part. I dont find any commands or register description.

In e2e post it is said that the mux is configured by the firmware.

But it doesnt seem to work for my customer: where can I find documentation on how to fix it? Is there known good firmware supporting this?

Olivier

  • 0
    TI__Mastermind 36756 points
    Hi Olivier,

    To configure the USB Mux for Pass through only, you need to enable "USB RP" in the System Configuration Register (0x28). However, in this case, you will need to disable "USB EP" and "USB2.0 Endpoint Billboard Enable" in the System Configuration Register (0x28). If the device fails to enter an alternate mode, it will send a billboard message on the USB2.0 data lines which will overwrite the USB data. It is recommended to disable USB EP and USB2.0 billboarding if you want to just pass through the USB2.0 lines into the system.

    Thank you,
    Eric
  • 0 in reply to Eric Beljaars
    Prodigy 40 points
    Can you indicate what tool or source code and where these register values are modified? Thanks.