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.
|