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The questions of swap TXN and TXP in use of TUSB1310A

kent zhou

Prodigy 150 points

Other Parts Discussed in Thread: TUSB1310

As the following drawing

I use the TUSB1310 as a USB host controller. In order to prevent the differential traces from crossing over one another,i have to swap the plus and minus on both of the SuperSpeed differential pairs. For the receiver,i can seting RX_POLARITY=1. But how can i handle with Transmitter?

Many thanks and Best Regards,

kent zhou

over 13 years ago

0 Elias Villegas M. over 13 years ago

TI__Guru* 76130 points

Hello,

You just swap the TX signals, the USB 3.0 compliant receiver on which your TX signals are connected will have to take care of them.

By specification, the USB 3.0 receiver is the one that detects a polarity inversion and handles it.

Regards.

0 kent zhou over 13 years ago in reply to Elias Villegas M.

Prodigy 150 points

Thank you for your reply.

You mean the USB3.0 DEVICE can handles it atomatically?

0 Elias Villegas M. over 13 years ago in reply to kent zhou

TI__Guru* 76130 points

Yes, in your TSUB1310A you are using the RX_POLARITY bit to handle a lane polarity inversion.

The USB 3.0 device which you are communicating to must have also a PHY which will handle the lane polarity inversion.

Regards.

0 kent zhou over 13 years ago in reply to Elias Villegas M.

Prodigy 150 points

I see,thanks!