when PHY_MODE0 = 0, PHY_MODE0 = 0 , work mode = ?
when PHY_MODE0 = 1, PHY_MODE0 = 0 , work mode = USB 3.0 transceiver
when PHY_MODE0 = 0, PHY_MODE0 = 1 , work mode = ?
when PHY_MODE0 = 1, PHY_MODE0 = 1 , work mode = ?
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when PHY_MODE0 = 0, PHY_MODE0 = 0 , work mode = ?
when PHY_MODE0 = 1, PHY_MODE0 = 0 , work mode = USB 3.0 transceiver
when PHY_MODE0 = 0, PHY_MODE0 = 1 , work mode = ?
when PHY_MODE0 = 1, PHY_MODE0 = 1 , work mode = ?
Check out the LTSSM state machine in the USB3 specification. It should first enable its SS RX termination and try to connect for something like 8 tries, then if there is no connection it should disable the SS termination and enable the HS termination and try to connect at HS.