Battery charging "logic"
Posted Oct 22, 2009 14:28 UTC (Thu) by forthy
In reply to: OMAP, N900 and openness
Parent article: Maemo Summit 2009: Fremantle, Harmattan, and N900
Having seen the data sheets of several battery charger chips for mobile
phones, I can't see what's that fuzz about (the data sheets are
available). These chips have an extremely simple interface: three logic
pins, all open drain logic: enable, power present, charging. There's
little possible magic behind driving these three pins.
What's more interesting is a charge tracking circuit - and the code
behind that. That code might have patented algorithms inside, so it's
probably not easy to release it.
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