Hello folks,
I'm using TUSB3410 in my design and I'm facing the following problem: I have to connect the USB cable many times until I get a good connection. In the first tries, I get the following message:
Translating:
“USB device was not recognized - One of the USB devices connected to this computer had a malfunctioning and Windows does not recognizes it. To get help to solve this problem, click on this message.”
Then, after aprox. 5 tries (not always the same number of unsuccessful tries), I can finally connect and communicate (COM4 port is detected). The communications works fine.
My TUSB3410 is being powered by the 5V bus power, and I’m using the TL760M33 LDO regulator to get 3.3V. A capacitive isolator (ISO7221) is also powered by the 3.3V.
The circuit schematic is shown below:
I wonder if the LDO is taking too long to start and the D+ D- pins start communications (on the PC side) before the TUSB3410 is ready. Could it be the problem?
Thanks in advance,
André Araujo