On Mon, May 7, 2012 at 10:00 AM, Mark Knecht <markkne...@gmail.com> wrote: > here are 3 or now I > think 4 different USB specs - EHCI, OHCI, UHCI, and then whatever USB > 3.0 is using
XHCI Furthermore, USB 3.0 has 9-pin ports and cables (for type-A) versus the 4-pin of USB 1/2. The USB 3.0 sockets are backward-compatible with older USB devices and cables, but older USB cables are not forward-compatible with USB 3.0.
