GPIO Shaowing

Werner Almesberger werner at
Sat Oct 11 22:14:54 CEST 2008

Jonas Bonn wrote:
> What is the purpose of the GPIO shadowing for bank B.  It looks to me
> that this would be needed for the case where the GPIO value can be
> correctly read back... is this the case, and if so, which GPIO is
> unable to be read back?  Otherwise, what is the purpose of shadowing
> these pins?

That's for the broken LED control (GPIO B0, 1, 2) in GTA02v5, where
the transistor's basis resistors were forgotten. This was partially
fixed with a component replacement in GTA02v5 MP models (only B2 is
affected) and completely solved in GTA02v6.

- Werner

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