Re: [Thinkpad] Anybody know? Is R30 USB 1 or 1.1?

I just found this:
http://www.usbman.com/Guides/USB_version1.0_version1.1.htm

Would you similarly interpret this to mean that there is no difference
between USB 1 and 1.1 on the ThinkPad side?

-Scott

> I'm pretty certain from personal past experience that any 1.0 interface
> is capable of 12Mbit/s. The question lies with the device being
> connected, as to whether it is a low of full speed device.
>
> -------- Original Message --------
> Subject: Re:[Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
> From: "Scott Matthews" <scott@turnstyle.com>
> To: "Jonathan Kelly" <jcrkelly@gmail.com>
> Date: 11/3/2007 9:34 AM
> > hmm, also from Wikipedia (http://en.wikipedia.org/wiki/Mbit/s):
> >
> > Interface and device speeds:
> > USB, Low speed (1.0) -- 1.5 Mbit/s -- 0.18 MB/s
> > USB, Full speed (1.1) -- 12 Mbit/s -- 1.5 MB/s
> > USB, Hi speed (2.0) -- 480 Mbit/s -- 60 MB/s
> >
> > And the current version of Wikipedia's USB page
> > (http://en.wikipedia.org/wiki/Usb):
> >
> > USB supports three data rates:
> > A Low Speed (1.1, 2.0) rate of 1.5 Mbit/s (192 KB/s)
> > A Full Speed (1.1, 2.0) rate of 12 Mbit/s (1.5 MB/s)
> > A Hi-Speed (2.0) rate of 480 Mbit/s (60 MB/s).
> > (no mention of USB1)
> >
> > Does a USB 1 port become a USB 1.1 though a driver update, or does a USB
1
> > port have different electronics?
> >
> > I'm just trying to figure out whether the USB on an X20 and R30 will do
12
> > Mbit/s, or just 1.5 Mbit/s -- and I can't seem to find anything that
> > documents it!
> >
> > Confused! -Scott
> >
> >
> >
> >
> >
> >> Weren't you just asking this about an X20 the other day?
> >>
> >> Also -- do you mean 1.1 vs. 2.0?? There aren't any speed diffs between
> >> 1.0 & 1.1. Just some fixes.
> >> From http://en.wikipedia.org/wiki/Usb#Version_history :
> >> USB 1.0: 1996, 1.5 & 12 Mbit/s
> >> USB 1.1: 1998, 1.5 & 12 Mbit/s
> >> USB 2.0: 2000, 1.5, 12 & 480 Mbit/s
> >>
> >> -------- Original Message --------
> >> Subject: [Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
> >> From: "Scott Matthews" <scott@turnstyle.com>
> >> To: thinkpad@stderr.org
> >> Date: 11/3/2007 8:25 AM
> >>
> >>> I can only seem to find things saying that R30 has USB, but not
whether
> >>>
> > it's
> >
> >>> USB 1 or 1.1
> >>>
> >>> Anybody happen to know?
> >>>
> >>> thanks, -Scott
> >>>
> >>> _______________________________________________
> >>> Thinkpad mailing list
> >>> Thinkpad@stderr.org
> >>> http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
> >>>
> >>>
> >>
> >
> >
>
>

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Received on Sat Nov 3 08:48:09 2007