On 1/10/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Am 9 Jan 2007 um 21:52 hat Jon Smirl geschrieben:
> Is it no power at all, or just not very much power? With no power you
No power. Rumors said, that it is because there is nowehere inside the N770 +5
Volt, the
device runs with 3.3 V or less. Since I don't have the schematics, I can't
prove that.
So how about the N800, does it have power? Is it a complete USB OTG
implementation?
770 puts out a USB OTG descriptor when it isn't compliant.
On 1/10/07, David Brownell <[EMAIL PROTECTED]> wrote:
On Tuesday 09 January 2007 10:26 pm, Jon Smirl wrote:
> On 1/9/07, David Brownell <[EMAIL PROTECTED]> wrote:
> > > It has a high speed USB
> > > OTG port (host/client)
> >
> > That's the N800 ... uses a TUSB6010 chip, the driver for which was a PITA
> > but it basically works. (And the CPU is much faster than the N770; it
> > uses an ARMv6 CPU, running at a faster clock rate.)
> >
> > As I understand, the device has a Mini-B port, not a Mini-AB. But other
> > than that it's pretty much ready to be a dual-role device ... not full
> > fledged OTG yet, but I've certainly observed the cable based role switch
> > stuff to work.
>
> 770 is supposed to have OTG too.
Not without providing at least 8ma VBUS power and a Mini-AB connector
it isn't. Instead, it provides 0mA VBUS power and a Mini-B connector. :)
The Tahvo chip has a USB transceiver that's not really OTG-capable.
But it can do "dual role", that is it can switch between host and
peripheral modes ... which is an OTG thing, if done the OTG way.
Which means initial role sensing via the cable connected to the Mini-AB
port, and HNP support to automatically switch roles later.
> I got the network to work. Seems there are problems with having the
> net and storage running simultaneously. This has an OTG Descriptor in
> it that is new to me.
It's a standard OTG descriptor, but the device shouldn't be putting
one out since it's not OTG-conformant.
- Dave
--
Jon Smirl
[EMAIL PROTECTED]
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