>  >
>  > I just don't understand why they are OK on Linux host PC and failed on
>  > Linux Host embedded MUSB OTG.
>
>  PCs have to source up to 500mA load on usb bus, embedded otg/hosts only up
>  to 100mA.
>

Maybe it is one explanation for these bugs.
I found the bug usb device:
USB SD card reader MaxPower = 250mA
Apple 30G iPod MaxPower = 500mA

But the latest 80G iPod Classic which also has MaxPower = 500mA works
fine with MUSB.

For this current source problem, I remember there are some external
VBUS charger IC can help the USB OTG to provide more than 100mA
current.

-Bryan
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