TUSB1002A: polarity swap at USB

Fred Cheng

Expert 5310 points

Part Number: TUSB1002A

Hi Brian,

is this an error that device RX is not connect to corresponding RX of the port?

over 1 year ago

0 David (ASIC) Liu over 1 year ago

TI__Guru**** 160826 points

Hi,

Polarity swapping is supported by the USB3 spec as a way to ease the board layout. The SSTX and SSRX pairs can be swapped and during SuperSpeed handshake, training sequences TSEQ are sent and the D10.2 symbol is used to detect if lane polarity inversion is done (refer to section 6.4.2 of the USB 3.0 spec).

Thanks

David

0 Fred Cheng over 1 year ago in reply to David (ASIC) Liu

TI__Expert 5310 points

Hi David,

just for self-learning, is there other protocol that support polarity swapping like HDMI or DP?

+1 Brian Zhou over 1 year ago in reply to Fred Cheng

TI__Guru*** 126610 points

there is no polarity swappng for DP and HDMI, maybe PCIe, but need to confirm.

Regards

Brain

Interface

Interface forum

TUSB1002A: polarity swap at USB