[gta02-core] USB schematics

[Werner Almesberger]

Rene Harder wrote:
> A cap would make sense for decoupling the USB_VBUS line, well a varistor
> has a capacitance as well but this one is quite small. ;-)

Well, it's a start ;-) No, I mean in addition to C4906, which is
directly on USB_VBUS, and C4911+C4913 which also help decoupling
inbound USB power.

> No, I mean if you click on a varistor you'll get the full description.
> In the description it's a 2.4V varistor which is wrong.

You learn a new thing every day ... neither xpdf nor evince show
this :-(

- Werner