-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Nikita V. Youshchenko schreef: >>> How can it charge over USB if it gets full discharged? >>> AFAIK, USB device is not powered by USB host until it is configured. >>> So gadged must be operational to charge over usb. >> Well, I'm almost certain that my USB mouse has no battery builtin, so >> I guess USB does provide some minimal power to enable configuration. > > Sure. > That depends on how usb client hardware is done. > In your mouse, there is microcontroller that controls usb client > functionality, and powers itself from usb (yes usb gives some limited > power - up to 100 mA if I remember correctly - even to client which is not > configured yet. > > But in case when USB is controlled by Linux USB Gadget driver, central CPU > must be operational and kernel up and running for USB client functionality > to work.
Or using the bootloader, or a seperate PMU or ... regards, Koen -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Darwin) iD8DBQFFsglVMkyGM64RGpERAqyNAKCoN3EsXO6yd3nwD5Yh3Q9iqjR1XACdFPyy bue2fXmyTTCgTP85GLh2Kv0= =OlGR -----END PGP SIGNATURE----- _______________________________________________ OpenMoko community mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/community
