[wellylug] FYI: Firewire vs USB2

[Brenda Wallace]

On Wed, 2003-09-10 at 22:13, Andrew wrote:
> 3. FireWire supplies power to devices. The FireWire bus can power 
> devices needing up to 15 volts of power, so that means that compact 
> "pocketable" hard drives can be powered by the FireWire bus, whereas 
> USB 2 portable drives need an external power brick.  This is why the 
> iPod can be charged by the computer it's connected to, as it uses 
> FireWire.  If the iPod used USB 2, it would require a separate AC 
> adapter to recharge the battery.

is this true?? usb1 devices are powered from the bus.. i've seen plenty
mp3 players that charge their battery from usb.
can you really no longer do that under usb2? or have i misunderstood
this?


-- 
Brenda Wallace <brenda at wallace.net.nz>