TUSB211A: question about TUSB211A

Hi Jimmy,

Correct, those resistors are not required. They are there to bypass the USB2 redriver if needed, likely.

As long as the USB2 trace connects underneath the USB2 redriver so that the data lanes are not broken, as per the design guidelines in the datasheet, then there should be no issues.

Thanks,

Ryan

Hi Ryan：

Thank you for your feedback！！！

As shown in the figure, Is it feasible to connect the two sides directly?

Do the networks of chips 1 and 8, as well as 2 and 7, need to be set to the same network? In this way, there is no need to deliberately use wires to connect to the same network again; Or is it that the disconnection belongs to a different network?

Hi Jimmy,

Yes, these two sides should be connected directly, as per this diagram:

The TUSB211A does not carry the signal through to the other end of the device, and instead actually monitors the USB signals as they pass beneath the redriver while touching the D1/2 P/M pins. While monitoring the signals, if it detects a USB2 signal, it will begin to boost the signal as it passes underneath it, prompting the reason why these data lanes should connect underneath the device.

Jimmy Huang said:

Do the networks of chips 1 and 8, as well as 2 and 7, need to be set to the same network? In this way, there is no need to deliberately use wires to connect to the same network again; Or is it that the disconnection belongs to a different network?

D1M should connect to D2M, and D1P should connect to D2P. As long as these are connected, there should be no issues.

Please let me know if you have any other questions.

Thanks,

Ryan