TUSB8040A1, works only in USB2.0, don't detected as a USB3.0 hub

Please provide your schematic.
If you don't want to post them here you can give an email address and I can contact you directly.
Regards

You can find the schematic with the Hub part.

Thanks for your help

Regards,

Pierre-YvesHUB_USB3b.pdf

Hello Pierre-Yves,

Elias will do a more in-depth schematic review, but can you confirm which drivers load on the hubs?  Also host / driver / OS information would be useful. 

A few quick things to check:  are the TX series capacitors installed in the design actually the value specified in the schematic?   Do the devices have adequate ground /  thermal pad connections?  An easy way to check this is to push down on the device and see if it works better.

Thanks!

JMMN

Hello JMMN,

I have checked the TX series capacitors, and they are correct (0.1uF), the thermal pad is correct too, I try your action (push down) but there is no effect.
I have try to connect the hub on two OS : Win7 and Wind8.1.
On Win7 : in the device manager, the HUB is declared as MTT USB2.0,
driver details : -iusb3hub.sys , Intel corporation, version : 2.5.4.40
On Win8.1 : in the device manager, the HUB is declared as Generic USB Hub,
driver details : -usbfit.sys/usbhub3.sys , Microsoft corporation, version : 6.3.9600.16384


If you need more information tell me.
Pierre-Yves

Hello Pierre-Yves,

Ok, can you send me a screen shot of the USB tree in Device Manager, or download usbview.exe from Microsoft:    and send me a screen shot of the usb tree using that?  The tool is pretty self explanatory.

Thanks!

JMMN

Hello,
I have some comments about the schematic:
1) Hubs U20 and U36 are embedded, so you need to install AC coupling capacitors on the SS_TX and SS_RX pairs.
2) Terminals PWRONz are connected to +5V, these terminals are not +5V tolerant.


Also, I would recommend to set PORT_DN3 as non-removable for Hubs U11 and U27.

Regards

Hello JMMN,

I have download USBview, you can see the sreenshots in attachment.

Thanks

Pierre-YvesScreenshot_USBVIEW.zip

Hello,

Thanks for the comments, I will add these modifications in the schematic, do you think the USB3 problem might be one of these points?
Thanks,

Pierre-Yves

Hello,

Have you got an idea of the problem or not?

I have to fix the problem for our new production.

Regards,

Pierre-Yves

Hi Pierre-Yves,

Very strange, the superspeed connection is not failing, it just doesn't exist.

The USBVIEW doesn't show any errors.  Have you tested this with multiple host controllers or just one?  Can you confirm if you attach a USB 3.0 device or standalone USB 3.0 hub directly to the host, that it attaches at USB 3.0 speed?

Also please try applying the latest Window updates.  There have been some USB 3.0 host driver issues that have been corrected recently.

On the board side, can you try - manually resetting the device while connected, confirming the core voltage is truly at 1.1V, and checking the crystal frequency?

Thanks!

JMMN

Hi JMMN,

I have attach a USB3.0 device directly to the host and it attaches as USB3.0 speed, I try also with a USB3.0 KEY directly on the computer and it works correctly in USB3.0 mode.

I have try to connect the USB controller on two different computer but I have the same problem, the controller stay in the HIGHSPEED mode.

The core voltage is OK, 1.1V.

I will order  the TUSB8040A1EVM to check if the controller is well recognized by the computer.

Pierre-Yves