Hi @ all,
i will use the HD3SS3212 SS-MUX for our next USB Type-C application.
A general problem to connect the USB Type-C receptacle is, that the second differential SuperSpeed paris of the Type-C receptacle have inverse polarity regarding the pins of the HD3SS3212.
One solution is to switch the negative and the positve wire, but that needs much space on the board and isn't good for signal flow.
In the schematic of your evalboard TIDA-00882 (USB TYPE-C HDD WITH POWER DELIVERY) connect the positve wires of second SS diff pairs to negative pin of the HD3SS3212 and vice versa. (see attached picture)
But at the output of the HD3SS3212 the signals have same polarity as the pins? How can that be?
In the datasheet (pg. 9) of the HD3SS3212 it is written: "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". But that means that we have the polarity of the input signals at the output signals, right?
So is it possible to connect the HD3SS3212 like in the schematic of the TIDA-00882? That would make it easier for me to connect the Type-C receptacle?
In other word: Can the HD3SS3212 invert the polarity of input SS-signals internally?
Thank you in advance!
Mustafa
