GTA02 USB and battery current profile

Werner Almesberger werner at openmoko.org
Sun Mar 9 12:24:33 CET 2008


Felipe Balbi wrote:
> Ehehe, pm chips... you never know:-p

Yeah, it's a complex beast for sure. But in general, it's behaving,
so I hope this is something we can solve.

> How are you triggering usb charging, btw?

We charge with 500mA if the host signals that we can, and we detect
our charger through a 48k, 1% resistor between ID and GND.

Our charger doesn't short D+ and D-. That new standard came too
late for that :-(

- Werner




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