TUSB211: The application of TUSB211

user6287025

Part Number: TUSB211
Other Parts Discussed in Thread: TUSB216, TUSB216EVM

We have a product, which is equivalent to a USB sound card. The USB cable connecting the device to the computer is 4 meters in total, and there is an adapter board in the middle. I added a USB signal conditioner TUSB211 to the adapter board. When the USB cable is inserted In some desktop computers, the front USB port is prone to being unable to play sound, or it can be started at first, but it will be silent after a few seconds or minutes. If TUSB211 is removed, it can play longer. where is the problem?

over 4 years ago

0 Malik Barton57 over 4 years ago

TI__Guru 64326 points

Hi,

For this application I would recommend using TUSB216, our latest USB 2 redriver. Could you tell me the state of CD, ENA_HS, DP and DM when the failure is seen? TUSB211 could be entering compliance mode. This is described in section 5.1 USB 2.0 High Speed Downstream Signal Quality Testing of the TUSB2XX Implementation Guide.

0 user6287025 over 4 years ago in reply to Malik Barton57

Prodigy 50 points

Hi Malik Barton,

Thanks for your reply.

We left the CD and ENA_HS floating, so I can't get the state of them.

The following figure is our schematic

0 Malik Barton57 over 4 years ago in reply to user6287025

TI__Guru 64326 points

Hi,

Your schematic did not post correctly could you try again or send it over direct message? Are you able to probe DM and DP? What connectors are on your adapter board, if any? If is workable I recommend getting TUSB216EVM to evaluate your system and probe CD, ENA_HS, DP and DM.

0 user6287025 over 4 years ago in reply to Malik Barton57

Prodigy 50 points

0 user6287025 over 4 years ago in reply to Malik Barton57

Prodigy 50 points

Hi Malik Barton,

Thank you.

Sorry for not posting the schematics correctly before. Do you mean to use oscilloscope to probe DM and DP? We use Type-C and micro USB on adapter board.

0 Malik Barton57 over 4 years ago in reply to user6287025

TI__Guru 64326 points

Hi,

Thanks for posting the schematic. I do mean using an oscilloscope to probe DM and DP using high impedance probes, is this possible for you? As an alternative do you have a USB 2 data analyzer that could be used to compare pass and fail case? You could also evaluate the system using the TUSB216EVM if you have a Type-C to A cable. TUSB216EVM would replace the adapter board in your testing.

0 user6287025 over 4 years ago in reply to Malik Barton57

Prodigy 50 points

Hi Malik Barton,

Thanks a lot. It's unconvenient for me to probe DM and DP.

If I use TUSB216EVM, do I need to connect SDA, SCL, RX_SEN / ENA_HS, RSTZ, CDP_ENZ?

0 Malik Barton57 over 4 years ago in reply to user6287025

TI__Guru 64326 points

Hi,

Using the EVM you do not need to connect SDA, SCL, RX_SEN / ENA_HS, RSTZ, CDP_ENZ to your system. These pins can be controlled external to get the different GPIO settings of tUSB216.

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TUSB211: The application of TUSB211