Hi, I designed two independent hub using TUSB2077 and self-powered hub with individual port power management, without a problem with them.
I can connect anyone of them to the PC and they are recognized immediately and, if I attach a memory stick to them, the pc is able to comunicate with the pendrive without problem.
However, when I want to connect them (the hubs) one behind of other (cascading) the one attached to the first one is not recognized by the pc. If I change the hubs (the one attached to the host is now attached to the other hub and the second one is now attached directly to the host) I have the same problem, the second hub is not recognized by the pc.
As I mentioned before, if I connect every hub to the PC independently, they work fine.
I checked some threads,
http://e2e.ti.com/support/interface/digital_interface/f/130/p/148840/538396.aspx
http://e2e.ti.com/support/interface/digital_interface/f/130/t/150366.aspx
about how to connect the TUSB2077 in cascading mode and I found that I have the same setups indicated in the forum, but I cant get it to work.
Any advice about this issue?.
Thanks in advance.
Carlos.
