Wish for 2nd generation Neo: USB 2.0
jjpfeifferjr at comcast.net
Sun Jan 21 14:56:30 CET 2007
Harald Welte writes:
>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.
I don't see this is a real problem -- 1.1 is supposed to do that too.
I'd have to look at the specs (USB and USBToGo) but I don't think
unpowered USB is actually compliant under any of them.
More information about the community