Connections and Pinouts

Macchina connections and pinouts are as follows:

The header pinout is the same as the Arduino Mega, with a few minor differences, including how the SPI lines are connected to the microcontroller. Read more about the SPI connections here.

[inline:mega_macchina_scaled.png]

http://arduino.cc/en/Main/ArduinoBoardMega2560#.Ux_YRyRkKbI

Both the Mega and the Macchina use an Atmega2560 as the microcontroller. Here is the datasheet:

http://www.atmel.com/Images/Atmel-2549-8-bit-AVR-Microcontroller-ATmega6...

Now that you have read all 435 pages of this datasheet, we can proceed.

3-Pin connector for Power and GND. Power can be 9-16 volts unregulated nasty power from your car.

6-pin Automotive interface connection with the following pins:

CAN HIGH
CAN LOW
K-LINE (LIN)
L-LINE
J1850+
J1850-

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