3 Replies Latest reply on Jul 8, 2011 11:18 AM by @zju.edu.cn.2

    two questions of bmattribute


      Hi! Anand!




      1,In the endpoint descriptor,when in isochronous transfer the bmAttributes's bit 3:2 defines Synchronization Type as :No Synchronization/Asynchronous/Adaptive/Synchronous, what's the differences among them?  To maximrize the transfer speed, how to set it?




      2,The bmAttributes's bit 5:4 defines Usage Type as :Data endpoint/Feedback endpoint/Implicit feedback Data endpoint, what's the differences among them?  




      Thank you!