Wrong Mini-USB-Jack

Harald Welte laforge at openmoko.org
Mon Apr 14 21:05:23 CEST 2008

On Mon, Apr 14, 2008 at 01:39:24PM +0200, thomasg wrote:
> Hi,
> In IRC we were wondering why the Freerunner, being a USB-OTG-Host (according
> to the OTG spec), only has a USB Mini-B interface (black jack).

While the GTA01 and GTA02 can both operate as USB host, they boat are
NOT an OTG compliant USB OTG host and therefore doesn't have a OTG
compliant Mini-AB socket.

Please complain to Samsung for producing SoCs with such a lack of USB
functionality :)

OTG is more than the software stack, more than the hardware jack
mechanics and more than supplying power to the socket.  OTG has fairly
complex electrical level requirements, too.  Those have to be handled in
a OTG compliant USB transceiver chip.

- Harald Welte <laforge at openmoko.org>          	        http://openmoko.org/
Software for the world's first truly open Free Software mobile phone

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