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

Jonathan Kelly jcrkelly at gmail.com
Sat Nov 3 07:51:13 CDT 2007


Yes.  From the linked article:

*Did the specification for the host controller change from version 1.0 
to 1.1? *

NO.  The host controller portion of the USB specification is unchanged 
in the 1.1 revision.  As part of a complete USB specification, 
specification 1.1 included the UNCHANGED 1.0 USB host controller 
specification.  There is NO difference in the host controller 
specification in version 1.1.

Which backs up my statement that the host in 1.0 & 1.1 are both capable 
of 12Mbit/s speeds, and it is the device that is the determining factor.
I recall back in the day that some webcams were 1.0 and others 1.1, and 
only the 1.1 cams were able to do 320x240 at 30fps. 

-------- Original Message --------
Subject: Re:[Thinkpad] Anybody know? Is R30 USB 1 or 1.1?
From: "Scott Matthews" <scott at turnstyle.com>
To: "Jonathan Kelly" <jcrkelly at gmail.com>
Date: 11/3/2007 9:48 AM
> 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 at turnstyle.com>
>> To: "Jonathan Kelly" <jcrkelly at 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 at turnstyle.com>
>>>> To: thinkpad at 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 at stderr.org
>>>>> http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
>>>>>
>>>>>
>>>>>           
>>>       
>>     
>
>   



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