I found the atmega pinout after rummaging through these forums:http://arduino.cc/forum/index.php/topic,125908.0.html
and the atmega's icsp, there are no dot on the pcb to tell its orientation, did anyone find out how it's oriented?
Yes, everyone can see number 50 and 52.. but I don't see the text there as I found on the mega picture.
There is a dot on the pcb and also a mark on the photo (maybe it should be made more obvious though) and the pinouts are correct for that orientation.
btw, attached here is the icsp header I was asking about, no dot's on my board. All the other headers around have the dot, not this one.but if the pinout in the first picture is correct, I guess the dot should be on top left corner of the header.
Please report any errors, and I will fix them.Colors indicate comparison to the Mega2560 which has a similar shield connector pinout. Green means the same as Mega2560. Red is for warnings. Orange shows new functionality:JTAG and SWD headers for debuggingDAC outputsCAN bus Two USB portserase switchPlease ignore the interrupt pins for now, these are not implemented in 1.5 but are planned for 1.5.1 so I will leave them where they are for the moment and revise when 1.5.1 comes out.revision 2: correct labelling of USB ports, SPI not ICSP header.revision 3: label JTAG and SWD pins, call out 16U2 ICSP (thanks to PeterVH)The definitive source remains the official Arduino Due hardware page. This pinout photo overlay is just for convenience.
Btw. the Vcc on the SPI is 5V and should be noticed
Quote from: Markus_L811 on Nov 13, 2012, 06:10 pmBtw. the Vcc on the SPI is 5V and should be noticedOn the spi in the middle?, SHIT!, And I have been using this and that.How can I know if my board is defunct or not ? I was attaching an unit that is supposed to handle 3v3 and 5v, but I tried mosi++ in the middle, and the same on the edge of the board.Mixing 5v and 3v3 on an board that is not 5v tolerant is not very nice design!
Yes saw it on this http://arduino.cc/en/uploads/Main/arduino-Due-schematic.pdf.It's true not an good move to have 5V on an 3.3V SPI some Sparcfun Shields use this Pin to detect the voltage too so they are dangerous too. Can you explain an bit more what are you have done so I can think about it.But it musst be possible too set each Pin high and low seperatly so you can detect if it works and you can use the pins as intput to check the other way. --> Serial echo