Rockbox mail archive
Subject: Re: Archos Jukebox/Studio USB cables for $1
From: Chris Muth (rockbox_at_muth.cc)
There are two versions of USB 1.1, one that runs at 1.5 Mbit, and does not require shielding.
1.5 Mbit USB is like for keyboards, mice, and such.
The other version of USB 1.1 is a 12 Mbit version and requires shielding.
There might be a length restriction on the unshielded version, I didn't read that part of the 1.1 spec.
On 9/26/03 at 6:17 PM Michael O'Quinn wrote:
>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
>> 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.
Page was last modified "Jan 10 2012" The Rockbox Crew