28 Jun
2010
28 Jun
'10
4:25 p.m.
В сообщении от 28 июня 2010 17:15:40 автор Mark Brown написал:
What I'm trying to figure out is if the GPIO is wired directly to the UDA1380 or if this is controlling something external to the UDA1380 which these designs just happen to have copied. If it's a direct connection to the UDA1380 then using GPIOs directly is perfectly sensible.
I'm not sure if s3c24xx GPIOs can drive UDA1380 directly. I suspect it's wired to the gate of some transistor (FET - is it right term to use here? :)) to handle higher current (sorry, English is not my native language, and it's hard to explain schematic-specific things, that's not my field :)). Btw, I'm sure that there's no any external power-control chip, maybe just single transistor.
Regards Vasily