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[FAQ] TUSB211A: My USB2 Redriver is not boosting when enabled during testing.

Ryan Kitto
Mastermind 24025 points
Part Number: TUSB211A

Tool/software:

I am enabling my TUSB211A while running test packets through our setup, but I am not seeing any boost. Why is that?

  • 0
    TI__Mastermind 24025 points

    Our USB2 redrivers have two requirements to begin operating. One, the device needs to see a pull-up on the DP or DM lanes, which indicates a device is connected downstream. After that, the device needs to see the squelch that follows a successful high-speed(HS) handshake. This squelch only happens AFTER a high-speed handshake. As such, if you enable the redriver WHILE the test_packets or a HS signal is being sent through the USB2 data lanes, the redriver will not see the squelch following the handshake, and will not enable.