USB RMH mode

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anu99
Posts: 1
Joined: Thu Apr 08, 2010 9:58 pm

USB RMH mode

Post by anu99 »

Hello,

In the BIOS we use, USB legacy mode is turned ON and RMH mode is turned ON too.
As per my understanding RMH mode is the advanced mode and legacy mode is for old fashioned UHCI controllers.
How can both modes be enabled at the same time? Aren't these two modes conflicting to each other?
Any information you can provide on USB RMH mode would be useful.
Architecture -x86 core i5.
Thanks!
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osdnlo
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Posts: 136
Joined: Thu Feb 25, 2010 5:39 pm

Re: USB RMH mode

Post by osdnlo »

Sorry for the late reply. RMH could mean many things, in this case it means Rate Matching Hub. Which:
Enables lower power requirements and manages the transition of the communication data rate from the high speed of the host controller to the lower speed of USB full speed /low speed devices.
As you can see, it does not interfere with LEGACY. It only makes it possible to run a LS/FS device on a HS controller. HTH :)
Yes, I see that you have proven it, but my question was, 'How did you know that would work?'.
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