Failing High Speed detection handshake

STPS — Thu, 22 Feb 2024 14:30:04 GMT

In Errata Sheet "LPC55S2x_LPC552x_ES", Rev. 2.5 — 19 December 2023, problem 3.5 USB.3: mentions a scenario where a High Speed device is connected to a Full Speed hub.

We have a Full Speed device, connected to a High Speed hub, and are facing an intermittent issue establishing connection from device to host. we are observing that when we do a sequence of rapid disconnect and reconnect, we sometimes are unsuccessful in reconnecting device to host.

Reading through 3.5 USB.3: in the Errata Sheet, we have found, implemented and tested option 2 as listed in the Errata Sheet, and found that it solves our issue reconnecting to host?

Can you confirm that this is the correct way for solving our issue, even though we are working with a scenario, where the speed of the hub used and device involded are inverted?

Re: Failing High Speed detection handshake

Alice_Yang — Mon, 26 Feb 2024 06:32:40 GMT

Hello @STPS

I think you can first test with the method. If still have issue, can contact us.

BTW, whether can config your HUB to FS speed.

Alice

MCUXpresso SDK中的主题 Re: Failing High Speed detection handshake

Failing High Speed detection handshake

Re: Failing High Speed detection handshake