Re: Generic AC USB chargers - Ipods and others
- From: mpm <mpmillard@xxxxxxx>
- Date: Mon, 17 Mar 2008 05:10:35 -0700 (PDT)
On Mar 16, 4:01�pm, George <gh424NO824S...@xxxxxxx> wrote:
PhattyMo says...
�> With my 2nd gen Nano,it won't charge no matter what I
�> do. There's a 'trick' to getting some of the others to
�> work from a 'non-smart' charger that involves a couple
�> resistors on the data lines,to either pull them high,or
�> low. This didn't work on my iPod,I guess it needs an
�> actual USB host controller to negotiate with? I dunno.
On further research, it may have something to do with this:
http://www.usb.org/developers/devclass_docs/batt_charging_1_0.zip
That's a new standard for USB charging published in March,
2007. �It now says that a dumb charger should have the data
lines shorted together. �Go figure.
So maybe the old and new ipods look for different things.
And I guess it's also possible that ipods really want a
formal connection to be established anyway.
I just wish I could find an authoritative explanation of
what's required. �I guess in time everything will comply
with the new standard, but in the meantime it would be nice
to know what the deal is for each ipod generation.
Interesting. Thanks.
I received an iPod nano (video) as a Christmas gift. (My first iPod,
but not my first MP3 player.) Love it.
I was wondering what the charge current was (would be) if the device
did not enumerate on the USB bus? For example, if I just wanted to re-
charge the battery on a PC that did not have the iTunes software
installed. I discovered that in that case, the iPod nano will just
enumerate as an external hard drive, so I assume the 100mA "pre-
enumeration" limit would not necessarily have to be imposed (since the
device was enumerated)? That said, for all I know the charger
function may never need more than 100mA anyway... But I was curious
about that....
-mpm
.
- References:
- Re: Generic AC USB chargers - Ipods and others
- From: PhattyMo
- Re: Generic AC USB chargers - Ipods and others
- Prev by Date: tonya cooley video free movie archive. Nude galleries
- Next by Date: Re: OT: Why I have decided to stop watching F1
- Previous by thread: Re: Generic AC USB chargers - Ipods and others
- Next by thread: Re: Generic AC USB chargers - Ipods and others
- Index(es):
Relevant Pages
|
