Hello all - I've got a project going and trying to understand the Arduino Duemilanove schematic - well, R2 and C13 anyway. These are the parts shown in this schematic: http://arduino.cc/en/uploads/Main/arduino-duemilanove-schematic.pdf
as coming from FT232RL pins #2 and #3 to the mega8 reset pin (why is that shown as "Atmega8 rather than ATmega168"? - wrong schematic I expect). Looks like R2 is in the RTS (pin #3) and C13 is in the DTR (pin #2) lines. C13 is a 100nF (.1uF) cap, and R2 is listed as "100_NM" - is that a 100 ohm resistor? OR what value? I've looked over my Duemilanove board and all I find are 102 (1K) and 1002 (10K) resistors. Did I miss something?
Can anyone explain what these lines do? I can see the RTS triggering the RESET pin (#1), but will the DTR line feed thru the capacitor? And just what does the "RESET-EN" do on that line?
Will the Deumilanove with m168 chip be the same wiring as the schematic shown?
Thank you to all for any help,