Arduino Nano

Output Voltage	Operating Voltage	Maximum Current	WiFi	BLE	USB Connector
5V  3.3V	5V				Mini USB

Detailed Pinout

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Simplified Pinout

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Notes:

• Pins in green are digital GPIO pins.
• Pins in blue marked ADC are analog input pins.
• Pins in orange are for Software Serial UART.
• I2C and SPI pins are named accordingly.
• The primary pin function is indicated closest to the board, secondary functions going outwards. If the pin is not required for the primary function it can be used for the secondary function.
• Pin numbers shown are to be used in code. They may be different from the numbers printed on the board.
• The ~ prefix for a GPIO indicates PWM support.
• The * suffix for a GPIO indicates Interrupt support.
• Do not use the pins marked with an X:
  • X1 and X2: Hardware UART TX and RX pins.
  • X3 and X5: Reset pins.
  • X4: Reference voltage pin.

Pin Functions