3 Replies Latest reply on Nov 14, 2011 5:06 PM by liu.ming

    A question about FX3 DVK Board schematics

    liu.ming

      Hello,

         

          I downloaded fx3 dvk board schematics from cypress website, and I have some question about it after some days.

         

          On J48(usb micro B connector) in page 9, the connector and the net label on it is as follows:

         

          connector       net_label

         

      -----------------------------------------

         

          6 (SSTX-)        SS_TX_M

         

          7 (SSTX+)       SS_TX_P

         

          9 (SSRX-)       SS_RX_P

         

          10(SSRX+)     SS_RX_M

         

      ------------------------------------------

         

       

         

      From Pin 6 & 7, Tx- is labeled as TX_M, and TX+ is labeled as TX_P.

         

      So, I suggest 'M' means 'Negative' and 'P' means 'Positive'.

         

      But From Pin 9 & 10, RX- is labeled as 'RX_P' and RX+ is labeled as 'RX_M'.

         

      Can someone tell me WHY? Is this correct?

         

      (My English is so poor, sorry!)

         

      Best, Regards.