I recently bought
Arduino Uno rev 3 board and I spent a lot of time trying to figure out the function of each individual pin. I googled all the fancy terms like
SDA, etc. and one by one I figured out the functional purpose for most of the pins.
However, there are few pins (actually pin groups) which have no labels around and I find it really difficult to figure out what these pins are supposed to do.
Again, I googled around and found this schematic from which I figured out that the 6-pin group at the bottom is about something called
ICSP (or at least this is what is written there). When I googled this term, I found this excellent explanation about the serial communication protocols.
However, at this point I am really confused.
- The explanation about the serial protocols doesn't mention at all
ICSP. By googling even further I only get more and more confused. Yes, I found the ICSP wiki page but I am not 100% sure that the bottom 6 pins are related to ICSP.
- From the same schematic which I found I see there are 4 additional soldered pads with label
JP2right above them. Currently I have no clue about the function of these pads. Question 1 - what are these soldered pads for?
- Right next to the
JP2stuff is a group of 6 pins (3 rows, 2 columns). The schematic is not clear about these pins. Question 2 - what is the purpose of these pins? Question 3 - where can I find the actual schematic (layout) about each individual pin?
- I am not 100% sure that the bottom group of pins (2 rows, 3 columns) is related to
ICSP. Maybe that's the case, maybe it's not. Question 4 - what is the purpose of these pins? Question 5 - where can I find the actual schematic (layout) about each individual pin?
Thank you in advance for your help!