This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
HD3SS3212 SS polarity inversion
Part Number: HD3SS3212
I'm trying to implement a usb type-c UFP by using HD3SS3212 as the switch between my device(cypress's FX3 usb controller) and the type-c connector, as the picture, the connector's ss pins connected to HD3SS3212's B and C ports, and FX3's ss pins connected HD3SS3212's A port.
But FX'3 ss pin order is not the same as HD3SS3212, I need to invert the polarity of HD3SS3212's A port.
I know that HD3SS3212 is a passive switch, and USB3 can detect polarity during link training, it's safe to ignore the polarity just routing the line from FX3 to HD3SS3212
But from HD3SS3212's datasheet Page 10, "The HD3SS3212 can tolerate polarity inversions for all differential signals on Ports A, B, and C. Take care to ensure the same polarity is maintained on Port A versus Ports B/C."
What does the last sentence mean?
and will my circuit work correctly?
The HD3SS3212 is a passive switch that supports different standard and some standards may not support polarity swap function as USB3.
For USB3, there is no issue with the polarity inversion on USB3 since the physical layer is able to detect and compensate the the polarity inversion after every connection event. You can follow the schematics from TIDA-00882 without any concern.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to David (ASIC) Liu:
Got it! Thank you very much!
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.