See also the mapping Arduino Mega 2560 PIN diagram. A maximum of 40mA is the value that must not be exceeded to avoid permanent damage to the microcontroller. 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 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.Įach of the 54 digital pins on the Mega can be used as an input or output, using pin Mode(),digital Write(), and digital Read() functions. This pin on the board provides the voltage reference with which the microcontroller operates. A 3.3 volt supply generated by the on-board regulator. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supply with power either from the DC power jack (7 – 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulate 5V from the regulator on the board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. The input voltage to the board when it’s using an external power source (as oppose to 5 volts from the USB connection or other regulated power source). If using more than 12V, the voltage regulator may overheat and damage the board. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. The board can operate on an external supply of 6 to 20 volts. The power source is selected automatically. The Mega 2560 can be power via the USB connection or with an external power supply. If more than 500 mA is apply to the USB port, the fuse will automatically break the connection until the short or overload is remove. Although most computers provide their own internal protection, the fuse provides an extra layer of protection. The Mega 2560 has a resettable polyfused that protects your computer’s USB ports from shorts and overcurrent. The Mega 2560 is an update to the Arduino Mega, which it replace Warnings The Mega 2560 board is compatible with most shields design for the Uno and the former boards Duemilanove or Decimal. 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 start. It has 54 digital input/output 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. The Arduino Mega 2560 R3 Board ATmega2560 ATMEGA16U2 is a microcontroller board base on the ATmega2560.
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