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

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
>>>
>>>
>>
>
>

_______________________________________________
Thinkpad mailing list
Thinkpad@stderr.org
http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
Received on Sat Nov 3 08:36:33 2007