AM3352: USB babble workaround

Nicholas Carley

Part Number: AM3352

Hello,

I've seen some other posts on this USB Babble topic, but there doesn't seem to be a concise solution in those posts.

https://e2e.ti.com/support/processors/f/791/t/533088?AM335x-USB-babble
https://e2e.ti.com/support/processors/f/791/t/308549

It seems USB babble is known issue on AM335X, If so, is there any workaround solution for this? Does USB port 0 have the same issue?

The other posts discuss FS mode, would this also be an issue in HS mode?

Thanks,
Nick

over 6 years ago

0 Bin Liu over 6 years ago

TI__Guru**** 178731 points

Hi Nick,

Babble is an known behavior on any USB system, not just AM335x. Babble is mainly caused due to poor board design/layout.

Do you face any babble issue on AM3352? If so please provide details.

0 Nicholas Carley over 6 years ago in reply to Bin Liu

TI__Genius 11235 points

Sorry for the delay in response.

Root cause is likely coupled radio noise caused by a non-ideal layout scenario. Will be making some layout changes to try and address this on a new spin of the board.

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AM3352: USB babble workaround