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Author Topic: What does JP2 do on the Arduino Uno Rev3?  (Read 3607 times)
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I'm working on a bit of documentation for the new Uno, and am wondering the purpose of the JP2 jumpers. Judging by the schematic, they connect PB4 to PB6, and PB5 to PB7, on the Atmega16U2.

Can anyway say what the purpose of connecting those jumpers might be?
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Is it possible that they are just broken out in a 2x2 header, but not necessarily meant to be shorted together?  Dunno, just thinking ...
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My vote is for a 2x2 breakout header. The ATmegaxU2 has lots of free pins, and it makes sense to make some available for fun things.

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May be these ATmega16U2 have some pin;s open and freely usable but hardly they would be used as not many would be messing with the Bootloading code, these guys are messing with the Simplicity of the Board.

i remember one post back where Nick posted about Rev3 pin-outs saying that these headers have made it further hard to use that mounting hole as this was the only hole because the other one parallel to it is already filled with Caps and power jack making it very hard to use in mounting.

Moreover these new changes must be clarified by the Arduino team this is not the way , if the forum is filled with pretty much experienced guys this doesn't means that they gonna shed the responsibility on forum;s nice guys.
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