I’d like to learn what the symbols and acronyms on the schematics for the Arduino 2009 mean so that I can better understand the whole thing. I’m looking at the schematic at http://arduino.cc/en/uploads/Main/arduino-duemilanove-schematic.pdf I’m hoping someone knows of a resource I haven’t seen yet that would help me figure some of this out.
An arduino glossary maybe?
Some of it is pretty obvious and other things I can pick out by googling around. I’ve confirmed that USBVCC is where USB provides power to the arduino. I already know TX and RX to be transmit and receive so was able to come up with the LED and 1k ohm resistors related to that and the similar circuit on pin 13 that I’ve read about. GND and +5V are pretty clear also. The reset button on pin 1 of the ATMEGA8 is also pretty clear.
At this point it becomes a bit more shaky. USBDM and USBDP aren’t something Google’s really helpful on. What is the stuff in the upper-left of the schematic and how is it related? I’m assuming RXD and TXD are a digital transmit and receive? Why it has M8 appended sometimes I can’t tell. I’m assuming that all the white boxes are resistors. I’m not sure what the dual dark lines in the middle of a wire are. The solid black box in the USB power circuit, is that a capacitor?
Tons of more questions could be asked, but I think I’ve probably used up my quota.