hi guys!!
Only one dumb question...
Arduino DUE's specs clearly establishes that the max V at every PIN is 3v3....but I couldn't find any about the ISP header.... MOSI/MISO on the DUE works at 3v3 or 5V?
Thanks and merry Christmas!!
everything is 3.3V except the 5V pin and Vin. The chip runs at 3.3V. And its not
an ICSP header on the Due I believe, just SPI. (The SAM chips are programmed over USB
only AFAIK).
My mistake!!! I was talking about the SPI header and its 5V pin....
I was asking because I thought that, if the SPI Header has a 5V pin... then it should be used to power the 5V SPI device(s) connected to it...
I'll disconnect the SD Card plugged into it.... which by the way is working fine...
thanks for the answer!!!
No, its pinned out identically to every other Arduino so that shields only need one
version (however older shields don't understand IOREF and 3.3V at all).
Its actually good practice to generate 3.3V locally on each shield from 5V as the voltage
tolerances are tighter and you don't risk overloading the host Arduino's 3.3 supply,
and you don't inherit noise from the other boards in the stack (noise matters more at
lower supply voltages).