Solve USB 3.0 issues with this one weird trick

RE: Solve USB 3.0 issues with this one weird trick

oleb0n — Thu, 06 Aug 2020 18:36:38 GMT

I can only add more confusion by adding that Ethernet (which is supposed to depend on GTR clock too) is also working fine. There is no chance that some good Samaritan secretly routed clocks in this design, I built it from scratch myself. Maybe there are some secret hidden scripts in u-boot or in Ubuntu rootfs,

RE: Solve USB 3.0 issues with this one weird trick

drozwood90 — Tue, 04 Aug 2020 21:10:31 GMT

Thanks for that, I would think you do need the clock as well. Is it possible someone wired one internally somehow? I know there is a path to do that - although not advisable due to the additional jitter.

--Dan

RE: Solve USB 3.0 issues with this one weird trick

oleb0n — Fri, 31 Jul 2020 15:22:01 GMT

I have a couple of basic questions. The board that I am working on is missing any clocks connected to GTR_REF_CLK[ .. ]. Somehow all USB3 devices seem to be happy and work at at least 60MB/s. After reading UG1085 I think we'll need to add a differential 52MHz clock to GTR_REF_CLK[0] and probably our USB falls down to USB2.0. Does this sound right?

Another detail that I need to clarify is does the clock have to be synthesized and adjustable like on the Avnet boards or I can simply place a tiny 3x5mm differential oscillator on my custom carrier?

Thanks!

RE: Solve USB 3.0 issues with this one weird trick

drozwood90 — Fri, 08 May 2020 16:06:05 GMT

Hi everyone,

I wanted to let you know that all the information seems to be loaded up on the product page now!

Happy USB-ing!

--Dan

RE: Solve USB 3.0 issues with this one weird trick

abhijeetsav — Tue, 28 Apr 2020 20:38:10 GMT

I would rather decapitate my hand and thank you substitute it with a USB 3 Center.

RE: Solve USB 3.0 issues with this one weird trick

Fred27 — Thu, 09 Apr 2020 14:17:24 GMT

Very informative. Has anyone ever seen a Micro-B SuperSpeed connector in the real world? If I ever saw one I'd assume it was an unofficial franken-connector hack.

RE: Solve USB 3.0 issues with this one weird trick

cstanton — Thu, 09 Apr 2020 13:45:08 GMT

Thanks Dan!