![]() The reference voltage for the internal ADC is by default set to 5V. Use this LED to perform Blinky operations. There is an on-board LED connected to digital IO pin 13. Digital IO Pins 50, 51 52 and 53 can be configured as SPI pins MISO, MOSI, SCK and SS respectively. The final communication interface is the SPI. Digital IO pins 19 and 18 as RX1 and TX1, 17 and 16 as RX2 and TX2 and 15 and 14 as RX3 and TX3 respectively.ĭigital IO Pins 20 and 21 can be configured as SDA (20) and SCL (21) to support I2C or I 2C or Two Wire Interface (TWI) communication. These pins are connected to the serial pins of the on-board USB to Serial Converter IC. Digital IO pins 0 and 1 are used as Serial RX0 and TX0 pins to receive and transmit serial data. In fact, the Arduino boards (UNO or Nano or Mega) are programmed using the serial communication.Īrduino Mega supports four hardware Serial Communication interfaces. Perhaps the most common communication interface in the Arduino universe is the Serial Communication. Communication Interfaces on Arduino MegaĪrduino Mega supports three different types of communication interfaces. You can use analogWrite() function for this. All the analog input pins provide a 10-bit resolution ADC feature, which can be read using analogRead() function.Īn important point about Analog Input pins is that they can be configured as Digital IO pins, if required.ĭigital IO pins 2 – 13 and 44 – 46 are capable of producing 8-bit PWM Signals. There are also 16 Analog Input Pins (A0 to A15). The value of the internal pull-up resistor will be in the range of 20KΩ to 50KΩ. An additional feature of the Digital IO pins is the availability of internal pull-up resistor (which is not connected by default). In that 54 pins (D0 to D53) are true digital IO pins, which can be configured as per you application using pinMode(), digitalWrite() and digitalRead() functions.Īll these Digital IO pins are capable of sourcing or sinking 20mA of current (maximum 40mA is allowed). Of the 86 pins available on the Mega board, 72 pins are associated with input and output. What are the Input and Output Pins of Arduino Mega?
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