2 Replies Latest reply on Apr 7, 2016 1:12 AM by jo.hyeonik

    USB Connector

    jo.hyeonik

      Dear sir,

         

       

         

      FX3 <--> USB Connector schematic line is below right?

         

       

         

      thanks.

        • 1. Re: USB Connector
          nisa

          Mr.Jo,

             

          You can swap the  SSRX pairs. This is because, during SuperSpeed enumeration, certain training sequences (called TSEQs) are sent and the D10.2 symbol in this is used to detect if lane polarity inversion is done (refer to section 6.4.2 of the USB 3.0 spec). However, such lane inversion detection is not done in USB 2.0 enumeration.

             

          So, this is okay. This inversion is recommended if your design will cause SSTX+ and SSTX- (or the RX pairs) to cross each other. Then you can swap these pins to avoid this crossing.

             

           

             

          Nishant

          • 2. Re: USB Connector
            jo.hyeonik

            Thanks sir.

               

            I changed the SSTX+ and SSTX- signal.