W. H. Heydt wrote:The characteristics of *board* are widely publicized: 5v at 700mA. Since you're buying a board and not just a BCM2835, why would the specifics of the BCM2835 matter to you?
It should be trivial that the GPIOs are connected to BCM, whichever the board. You can understand that current and voltages must be known in order to use other logic which is not only the 3v3 HC one, some cases of compatibility could be exploited or issues arises if unknown. Same for the current and the fan out, problem in which I stepped in. I should GUESS what is not working, exploiting the fact that i'm in this field, instead of make some calculus. For a newbie, this is not educational at all (for digital electronic circuits point of view).
If the GPIOs where inaccessible, that is the case in which your sentence make sense, because I can only use USB, which are known it's electrical specifications.
Once I asked about the L2 cache, the answer was "why do you ask this?". I can't stand to read those answers, expecially in a forum desinged to helping people learn around the Pi itself. But in a way, that was making more sense because I can't do nothing on the L2 cache (I think...). I'm not mad with you, but it's just to make the point.