TUSB542: Compliance test was fail in Sig Test.

Hi Kengo,

Can you plug the test fixture in first, before starting LFPS? I am wondering whether the initial LFPS may be affected by mechanically plugging in the fixture.

Best,

Shane

Hi Shane,

Thank you for your reply.

Yes, we have already confirmed the procedure.

By the way, the same waveform was not produced when connected to a PC.
I'd like to know why only the compliance test is generated.

BR,
Kengo.

Hi Kengo,

The 322I should not have an impact on high speed data compliance, as it only handles CC communication.

From the image you sent it seems the TX channel fails while the RX channel passes.

Here are some questions I have to help find the issue.

1. I can't see from your image what the bottom waveform is measuring. Is that the DIR pin on the 322?

2. Can you send the compliance report for this test? I'd like to have a better idea of what test is failing specifically.

3. Are you able to provide the schematic of your system? This would make it easy to spot a design issue if one exists.

You can direct message files to me over E2E by accepting my friend request. This would be so others on the public E2E forum cannot see these files.

Best,

Shane

Hi Kengo,

Were you able to make the change I suggested and re-test the board?

If this issue is resolved I can close the thread.

Best,

Shane