Arduino Nano is a microcontroller board that is similar to the Arduino Uno board but small in size and the for readers who are not familiar with microcontrollers; microcontrollers are devices that contain a CPU, RAM, ROM, and I/O pins on a single integrated circuit and are used in electronic projects. In order to understand the Arduino boards and to use them effectively one must first go through the pin configuration of the specific board.
In this write-up, we will explore the pin configuration of the Arduino Nano in detail.
What is the pinout configuration of Arduino Nano
Arduino Nano board contains thirty pins that are used for different purposes, and this usage of the pins is explained in detail in the next sections.
Digital pins: There are fourteen pins that are used for the Digital inputs/outputs and are labeled as D0 to D13, where some digital pins are used for specific purposes, which are described in the table below:
| Digital Pins | Specific Function |
|---|---|
| D1 | Used for the serial communication as transmission TX |
| D0 | Used for the serial communication as receiver RX |
| D3 | Used for the timer (O2CB) |
| D4 | Used for the timer (T0/XCK) |
| D5 | Used for the timer (OC0B/T1) |
| D8 | Used for the timer (CLK0/ICP1) |
| D9 | Used for the timer (OC1A) |
| D9 | Used for the timer (OC1B) |
| D11 | Used for the SPI as master output slave input (MOSI) and Timer (OC2A) |
| D12 | Used for the SPI as a master in slave output (MISO) |
| D13 | Used for the SPI (SCK) |
Analog pins: There are 8 pins that are used for the Analog inputs and are labeled as A0 to A7, where A4 and A5 are used by I2C communication, A4 as SDA, and A5 is used by SCL.
Power pins: There are 3 different pins providing three different options for the power input and labeled as 5V which means providing constant five volts, Vin which means providing irregular voltage, and 3.3V means providing constant 3.3 volts.
Ground Pins: There are two pins that can be used as a ground, and they are labeled as “GND”.
RESET: There are two pins labeled as RST, which are used to reset the board.
AREF: One pin of the Arduino Nano is referred to as an analog reference pin. It is used to connect an external power supply as a reference voltage.
Conclusion
Different boards of the Arduino have different pinout configurations according to which different tasks can be accomplished. Arduino Nano is one of Arduino boards with a small form factor. Nano can do all the tasks that an Arduino Uno or Mega can do but a small form factor makes it quite advantageous for compact projects.
