Daily use of Neo1973
shawn.t.rutledge at gmail.com
Wed Feb 20 21:13:13 CET 2008
On Wed, Feb 20, 2008 at 1:05 PM, Peter Rasmussen <plr at udgaard.com> wrote:
> I have a Motorola A780 mobile, and the charger that comes with it has a
> mini-USB connector, and it charges the Neo1973 very good for me. It also
> handles a 500mA load.
That's interesting; I thought the issue was that Motorola chargers
have the RX and TX lines connected together, or something like that,
so the phone can detect that a dumb charger is connected (as opposed
to a hub that can't deliver 500mA). Are you sure you are getting
500mA from it? Then either yours must be a smart charger after all
(the phone can talk to it and get permission to go into fast_cccv
mode) or something has been fixed that I didn't know about... My
theory was that if the USB lines could also be used in GPIO mode, then
you can detect a dumb charger with a little bit-banging. I bet that's
what the Moto phones do (guessing).
> I don't know about a car charger (I have dis-selected having a car :-)
> so I can't advice you about that.
Motorola makes those too, but they are also dumb chargers (just a
regulator supplying 5V).
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