I remain completely confused about the whole auto reset/reset-en portion of the Uno schematic, in spite of lots of searching the forum on the subject.
In closely observing my Uno r2 , I can see that the solder blob/trace marked reset-en is cut through(it was purchased used and it came that way). My Uno r2 resets anytime the serial monitor is opened.
Now in looking at the Uno schematic http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0CDcQFjAF&url=http%3A%2F%2Farduino.cc%2Fen%2Fuploads%2FMain%2Farduino-uno-rev2-schematic.pdf&ei=oP3LU_vaLY6ayATk84IY&usg=AFQjCNEo5hlYZcYENktyvcmFL5nSgNc8vA&bvm=bv.71198958,d.aWw
in particular the partial schematic snippet that I have attached, I fail to see how making or breaking the connection marked 1 and 2 would have any effect on the overall circuit. It is in parallel with another unbroken trace.
What am I missing, it is driving me crazy?