Hi All, Does anybody used STUSB4500 A_B_SIDE signal for mux selecting TUSB542 IC. Regards, Vyshnav Krishnan

[Gregory Go.]

Hello,

The A_B_SIDE pin of STUSB4500 tells you the orientation of the USB-C cable.

- If the A_B_SIDE pin is at level '1', it means the CC line (of the USB-C cable) is connected to CC1 pin.

- If the A_B_SIDE pin is at level '0', it means the CC line (of the USB-C cable) is connected to CC2 pin.

Thus you can know which pins are used for USB 3.x data transfer:

- If CC1 is used, then the USB 3.x SuperSpeed signals are coming from TX1+/TX1- and RX1+/RX1- (i.e. the SuperSpeed pins closer to CC1 pin).

- If CC2 is used, then the USB 3.x SuperSpeed signals are coming from TX2+/TX2- and RX2+/RX2-

Best regards.

[Vvk.755]

Hi Gregory,

Thank you for your valuable response. In my design I have used A_B_SIDE of STUSB4500 to select TUSB542 USB 3.0 re-driver. But USB3.0 is not getting detected. The USB3.0 Device is detected as high speed device, than super speed device.

Regards,

Vyshnav Krishnan