TI中文支持网Other Parts Discussed in Thread:TUSB1002EVM
Hi FAE
Our product has a USB 3.2 Gen1 Type C interface, but when our product is connected to a computer's USB Type C interface, it is sometimes recognized as USB 2.0; If the computer is older, it will always be recognized as USB 2.0. So we applied for the USB Redriver chip TSUB1002 Demo Board to test it. Connect the TSUB1002 Demo Board between our product's Type C interface and the computer's Type interface, connect all USB cables, and then power on our product. After our product is launched, the computer cannot recognize the USB of the product, not even USB 2.0. Keep the product powered on, unplug the USB cable from the computer's USB port, and then plug it into the computer's USB port, the computer can recognize USB 3.0 of product.
So the problem is that after the product is started, the computer cannot recognize the USB. After plugging and unplugging the USB cable once, it can recognize USB 3.0 normally. What could be the reason for this?
Thanks very much !
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Lydia：
您好，
已经收到了您的案例，调查需要些时间，感谢您的耐心等待。
,
Links：
Could you verify, in both scenarios where USB3 does or doesn't work, whether VBUS is being passed through the board or not? If both USB2 and USB3 are not working on start up, my first guess is that potentially VBUS is not being sent, as the TUSB1002EVM just carries the USB2 signal through the board without affecting it, and that is causing no communication to take place.
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