IDF: Certification for USB 3.0 Hubs still pending
2 Oct 2012 11:16:33
Leading up to the currently taken place IDF (Intel Developer Forum) in San Francisco, Renesas has announced their 4-Port-USB-3.0-Hubcontroller µPD720210. However, there are no plans to supply any of it's customers with it for the moment. A company spokes man said as long as as the chip as not been certified by the USB-IF it would not be appropriate to do so particular as Renesas is a member of the Standardization group.
Renesas is expecting the certification program to start in the forth quarter and will subsequently start to sell the chip to the hub manufactures.
Competitor Genesys Logic has also a Hub-controller named GL3520 in it's portfolio that is not available yet either. However, they are a bit more skeptic. The forth quarter keeps getting mentioned but this has been the second quarter for this year earlier this year. As a matter of fact the USB-IF has not release a test suite/cases for USB 3.0 Hub, hence due to the lack of user profiles no certification can be achieved. The problems seems to be in the details for power and link management, that is rather complex when featuring four downstream and one up-link port. Also, internally the the controller has to manage between USB 3.0 and USB 2.0/1.1.
Thus all currently available USB 3.0 Hubs that are using VIAs at the beginning of 2010 introduced VL810 orVL811/VL812 chips have no certificate. In general they are working as designed but there is no guarantee these USB 3.0 Hubs will work with all USB 3.0 devices, support the maximum possible bandwidth and handle PC standby's with the host-controller.