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Author Topic: Does USB3 support OTG ?  (Read 14204 times)

tkafafi

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Does USB3 support OTG ?
« on: March 07, 2012, 09:22:05 pm »
 I've seen refrences that USB3 will support OTG. But I'm confused as to whether that refers to OTG at superspeeds (5G) or the legacy full speed (480) .

Thanks
Tamer
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Jan Axelson

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Re: Does USB3 support OTG ?
« Reply #1 on: March 07, 2012, 10:10:02 pm »
All OTG products have to support full speed when functioning as a host, but that doesn't preclude SuperSpeed operation. SuperSpeed products might need clarification on how to perform ADP, SRP, and HNP, which use the D+/D- lines for signaling.

The USB 3.0 spec defines USB 3.0 OTG connectors.

I don't know if any SuperSpeed OTG controllers are available.

Jan
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Pat Crowe

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Re: Does USB3 support OTG ?
« Reply #2 on: March 08, 2012, 11:13:43 am »
Just a small point, Jan, probably just a mis-speaking, but ADP uses VBUS to do its signalling.

By the way, the USB 3 spec package contains the full OTG 3 supplement. Actually, it's time I read it myself!
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Jan Axelson

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Re: Does USB3 support OTG ?
« Reply #3 on: March 08, 2012, 11:43:17 am »
>ADP uses VBUS to do its signalling.

Yes.

>By the way, the USB 3 spec package contains the full OTG 3 supplement.

You're right! It wasn't in earlier versions.

Jan
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