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General questions about STM32F7 Discovery board.

Question asked by ramos.james on Jan 7, 2016
Latest reply on Jan 8, 2016 by Clive One
This one. 

Now, I have spent just about all day looking for this one, but to no result. 

This thing in the top-corner labelled "I2C Extension Connector." What connector is it?

The microcontroller apparently has 4 I2Cs. Now, on this PDF on page 8, it shows only 3 are used, one which goes to the I2C extension connector, and the other which I assume to be on the Arduino header, is that assumption correct?

The Arduino headers are designed for the features and pin-count of the Atmega328, now the STM32F7 is a much larger microcontroller, so, my question is, are all features, timers, etc, that are unused by the peripherals that come with the board accessible on the Arduino headers? If not, are there any extra headers that aren't obvious on the image that allow me to access them?

Also, has anyone who owns the board tried overclocking it? If so, what were your results?

Lastly, if anyone here owns the product, can you please take an image of it that shows the I2C extension connector in more detail? The only photos I could find on the internet where shot from the top.

Any assistance is appreciated, and I apologize if the answers to these questions seem obvious to you, as they are not as obvious to me.