Wish for 2nd generation Neo: USB 2.0

Harald Welte laforge at openmoko.org
Sun Jan 21 00:06:31 CET 2007

On Thu, Jan 18, 2007 at 10:23:24AM +0100, Sven Neuhaus wrote:
> Since everyone is drooling about the next iteration of the Neo which is
> exptected to include WiFi, I figured I'd add a request for USB 2.0. This
> allows us to use a USB VGA adapter
> (http://www.tomshardware.com/2005/06/08/add_a_monitor_using_usb/ - Linux
> driver available!). A VGA port enables the Neo2 to replace a laptop for
> doing presentations (in some cases) and you could even watch movies stored
> on its microSD card (or streamed by a BluOnyx) on a battery powered HMD! :-)

Thanks, this has actually already been on our wishlist for a future
generation of our phones.

The main problem (with more powerful SoC) is not to provide a USB2.0
host port in the device.  The main problem is power.  You need a pretty
powerful DC/DC step-up converter to provide the 5V power supply to the
USB bus.  And you have to provide at least up to 100mA - but to support
all devices, 500mA.

Most mobile devices today are on very low power, 3.3V usually is the
highest supply voltage you have anywhere, moving lower and lower every


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

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