1
\$\begingroup\$

I am unsure of how to design for the following arrangement, any input would be greatly appreciated:

Computer [USB Type-A Connector] -> USB Type-A to USB Type-C Cable -> Custom PCB [USB Type-C Connector] -> HD3SS2522 MUX (http://www.ti.com/lit/ds/sllses1c/sllses1c.pdf)

As the computer uses a USB Type-A connector, the USB Type-C specific lines are missing (SBUx, CCx). As far as I understand, the MUX uses the CCx lines to determine the cable orientation and route accordingly. Without these lines, how would the MUX be able to know the cable orientation?

Thanks!

EDIT:

I missed the part of the USB Type-C Specification which refers to USB Type-C to USB 3.1 Standard-A Cable Assembly Wiring (Table 3-12). It states that a pull-up resistor Rp (56KOhm) is used on pin A5 within the USB Type-C plug. This will set the source advertisement as "Default USB Power" and also allow the MUX to detect the cable orientation.

\$\endgroup\$
0
\$\begingroup\$

I would look at the "HD3SS3220 DFP Dongle Evaluation Module" from TI. http://www.ti.com/tool/3220dfp-dglevm

It seems to do everything you want. Here is a block diagram of the components. enter image description here

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.