From: Michael O'Quinn <michael_at_oquinn.info>
Date: Fri, 26 Sep 2003 18:17:05 -0700 (PDT)

On Fri, 26 Sep 2003, Chris Holt wrote:

> On Fri, 26 Sep 2003 17:24:48 -0700 (PDT), Michael O'Quinn wrote:
> > It may not be USB 2.0 certified, and if not it may or may not work at
> > the higher speed.
>
> There is no USB 2.0 certification for cables. The spec did not change
> from the 1.1 specification. That is not to say that many cable
> manufacturers did not take advantage of the lesser requirements of USB 1.1
> and make substandard cables, but simply that the specification for USB
> cables has always been the same.

As I understand it, the 2.0 spec requires cables to be shielded, whereas
1.x did not.

Of course, that may all be hogwash.

Then again, I've noticed that all motherboards I've seen with USB 2.0
headers have an extra pin for the cable shield, and that was never (or
very rarely) there with USB 1.x.

Michael
Received on 2003-09-27