Thread: N900 will not allow USB OTG!
View Single Post
allnameswereout's Avatar
allnameswereout is offline allnameswereout
2009-10-01 , 18:54
Posts: 3,397 | Thanked: 1,212 times | Joined on Jul 2008 @ Netherlands
#368
Originally Posted by attila77 View Post
Not different - the latter is simply not allowed by the standard so it has no rules It's the same thing as with the N800's OTG, which isn't quite OTG certified either. USB OTG specifies "The USB On-The-Go standard introduces a new plug receptacle called Micro-AB. An OTG product must have a single Micro-AB receptacle and no other USB receptacles.". And this is just the connector, we haven't even started talking about the software/logic part of it which is also part of the certification process...
Yes, but that is from that last update from may 2009. The Nokia N800 was made before that date. Or, do you mean there never was officially a thing as USB OTG using miniUSB connectors?

Anyway, from what we gathered, Igor is absolutely right that USB consortium is the one and only organisation we should be angry at, and devote our complaint at. Not Nokia.

If your device does not adhere USB standard, you are not allowed to call that feature USB. Those are simple trademark rules, and these are even important for open standards (like with Android's 'Java'). If Pandora does not adhere USB standard but calls the ports USB then they may be in shallow waters. Perhaps they can work around by calling it USB-compatible, but even that is strictly speaking incorrect.

[EDIT, without digging in the USB docs it is pretty clear what happened with Pandora on the bottom of wiki page:

mini-A and mini-AB connectors have been removed from the present USB standard. This means that the above connectors may vanish from the market at some point (although there will probably be demand for them for some time). There are a lot of connectors available that were never standardized. It is recommended that you do not use them as they may lead to non-working connections. Stick to the cables and adapters mentioned above and look for a mention of "OTG" or "On The Go" and you should be on the safe side.
Then follow 3 links:

USB 2.0 Standard (including present OTG spec)
Original OTG Specification defining mini-A and mini-AB and allowed connections
mini-A and mini-AB Deprecation Announcement
They do not link to the revision from may 2009.

The last link is from may 23 2007 and is of particular interest:
Vendors of USB On-The-Go (OTG) products are directed to adopt the Micro-AB receptacle on all new OTG designs in lieu of the Mini-AB previously approved for this application. In addition, all Mini-A and Mini-AB connectors that are currently on the Integrators List will be removed.
and
On-The-Go Supplement to the USB 2.0 Specification, Version 1.3 – Previous versions of the OTG specification contained protocol and mechanical definitions, in this new version the mechanical section is removed. The Mini-A and Mini-AB cables and connectors previously defined in the OTG Supplement no longer have a place in any USB current specification.
I don't know how this certification works though. Does a final product require a certification? Then final Pandora will not pass USB certification.[/EDIT]
__________________
Goosfraba! All text written by allnameswereout is public domain unless stated otherwise. Thank you for sharing your output!
Last edited by allnameswereout; 2009-10-01 at 19:51.
 

The Following 3 Users Say Thank You to allnameswereout For This Useful Post: