TUSB211 / USB Certification

Kuramochi Tadahiko

Guru 28715 points

Other Parts Discussed in Thread: TUSB211

Hi,

I posted following question and have an additional question.

Has the application used the TUSB211 passed USB-IF compliance program?

My customer is worrying to affect this noise to certification.

Best Regards,

Kuramochi

over 9 years ago

0 Undrea Fields over 9 years ago

TI__Genius 12860 points

The TUSB211 has passed USB2.0 Electrical and CV compliance testing as part of both Host and Device system testing. The waveforms observed are a result of the device detection mechanism of the device and are only present when no device (Or terminated test fixture) is attached.

0 Kuramochi Tadahiko over 9 years ago in reply to Undrea Fields

Guru 28715 points

Undrea-san

Thank you for your answer.

There is the test mode called "SE0_NAK" in the USB compliance test.
How does the USB211 work during SE0_NAK test?

My customer considers that the result of test is affected when detecting function begin to work during SE0_NAK test.

Best Regards,
Kuramochi

0 Kuramochi Tadahiko over 9 years ago in reply to Kuramochi Tadahiko

Guru 28715 points

How is this situation?

Kuramochi

0 Undrea Fields over 9 years ago in reply to Kuramochi Tadahiko

TI__Genius 12860 points

No issues have been observed with this test. What specifically is the concern?

0 Kuramochi Tadahiko over 9 years ago in reply to Undrea Fields

Guru 28715 points

Undrea-san,

Thank you for your comment.

My customer is thinking that the following output must be affected to SE0_NAK test mode.

If this output isn't affected to S0_NAK, could you tell me the principle?

Best Regards,

Kuramochi

0 Undrea Fields over 9 years ago in reply to Kuramochi Tadahiko

TI__Genius 12860 points

This waveform will not be present when a device is connected. The waveform captured is only present when the TUSB211 is looking for a physical device connection.

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TUSB211 / USB Certification