![]() One USB type B which can be used for programming the board and for providing power to the board. USB Connector: The board has two USB port. ![]() ICSP Header: The ICSP header is intended for programming the board with an external programmer.Reset Button: The reset button can be used to restart the microcontroller or to put it into bootloader mode for uploading new sketches.The board also has a VIN pin, which is the input voltage to the board when it is powered by an external power supply. Power Pins: Arduino Mega ADK have several power pins, including 3.3V and 5V pins, which can be used to power other devices or sensors.Analog Input Pins: The board provides 16 analog input pins, which can be used for reading analog sensors, such as temperature sensors, light sensors, and potentiometers.15 of these pins can also be used as PWM outputs for controlling the brightness of LEDs or the speed of motors as an example. Digital I/O Pins: The board has 54 digital input/output pins, which can be used for a variety of purposes, such as reading sensors, controlling LEDs, and communicating with other devices.Dimensions: The board measures 101.52mm x 53.3mm.Here are a few of the most important components and connectors to be aware of: The Arduino Mega ADK is a relatively large development board that is packed with a variety of components and features. The second one is a not connected pin, that is reserved for future purposes.Arduino Mega ADK Rev3 Pin Headers and Components In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the board that uses ATSAM3X8E, that operate with 3.3V. 1.0 pinout: SDA and SCL pins - near to the AREF pin - and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board.Revision 3 of the Arduino board and the current Genuino Mega 2560 have the following improved features: Revision 2 of the Mega 2560 board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode. Instead, it features the ATmega16U2 (ATmega8U2 in the revision 1 and revision 2 Arduino boards) programmed as a USB-to-serial converter. The Mega 2560 does not use the FTDI USB-to-serial driver chip used in past designs. Note that these pins are not in the same location as the TWI pins on the old Duemilanove or Diecimila Arduino boards. Support TWI communication using the Wire library. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. There is a built-in LED connected to digital pin 13. 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. These pins support SPI communication using the SPI library. Provide 8-bit PWM output with the analogWrite() function. See the attachInterrupt() function for details. These pins can be configured to trigger an interrupt on a low level, a rising or falling edge, or a change in level. External Interrupts: 2 (interrupt 0), 3 (interrupt 1), 18 (interrupt 5), 19 (interrupt 4), 20 (interrupt 3), and 21 (interrupt 2).Pins 0 and 1 are also connected to the corresponding pins of the ATmega16U2 USB-to-TTL Serial chip. Used to receive (RX) and transmit (TX) TTL serial data. In addition, some pins have specialized functions: 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. 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 supplied 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 regulated 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 opposed to 5 volts from the USB connection or other regulated power source).
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