Arduino Mega 2560 Rev3 Mac OS X

The SPI pins are also broken out on the ICSP header, which is physically compatible with the Arduino Genuino Uno and the old Duemilanove and Diecimila Arduino boards.

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With 54 digital IO pins, 16 analog inputs and a larger space for your sketch it is the recommended board for 3D printers and robotics projects.

It has 54 digital inputoutput pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.

It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

The Mega 2560 board is compatible with most shields designed for the Uno and the former boards Duemilanove or Diecimila.

It communicates using the original STK500 protocol ( reference, C header files ).

The ATmega16U28U2 is loaded with a DFU bootloader, which can be activated by.

Arduino Mega 2560 Rev3 Mac OS X

You can then use Atmels FLIP software (Windows) or the DFU programmer (Mac OS X and Linux) to load a new firmware.

Or you can use the ISP header with an external programmer (overwriting the DFU bootloader).

Although most computers provide their own internal protection, the fuse provides an extra layer of protection.

If more than 500 mA is applied to the USB port, the fuse will automatically break the connection until the short or overload is removed.

Leads from a battery can be inserted in the GND and Vin pin headers of the POWER connector.

If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable.

If using more than 12V, the voltage regulator may overheat and damage the board.

You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.

The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V).

Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board.

A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.

Each pin can provide or receive 20 mA as recommended operating condition and has an internal pull-up resistor (disconnected by default) of 20-50 k ohm.

A maximum of 40mA is the value that must not be exceeded to avoid permanent damage to the microcontroller.

Pins 0 and 1 are also connected to the corresponding pins of the ATmega16U2 USB-to-TTL Serial chip.

These pins can be configured to trigger an interrupt on a low level, a rising or falling edge, or a change in level.

Arduino Mega 2560 Rev3 Driver