Arduino Nano-compatible
A static reference page for an Arduino Nano-compatible FTDI board, including common pins, power rails, communication interfaces, and datasheet references.
Pin index
Quickly scan every header pin, port name, supported function and usage note.
| Pin | MCU pin | Types | Notes |
|---|---|---|---|
PB5 | GPIOSPILED | Digital pin 13. SPI SCK and usually connected to the built-in LED. | |
3V3 | Power | Regulated 3.3V rail for low-current peripherals and sensors. | |
AREF | Analog | Analog reference input used by the ADC when an external reference is selected. | |
PC0 | AnalogGPIO | Analog input with 10-bit ADC resolution. It can also be used as digital GPIO. | |
PC1 | AnalogGPIO | Analog input A1. Can also be used as digital GPIO. | |
PC2 | AnalogGPIO | Analog input A2. Can also be used as digital GPIO. | |
PC3 | AnalogGPIO | Analog input A3. Can also be used as digital GPIO. | |
PC4 | AnalogI2CGPIO | Analog input A4 and I2C data line when using the Wire library. | |
PC5 | AnalogI2CGPIO | Analog input A5 and I2C clock line when using the Wire library. | |
ADC6 | Analog | Analog-only input available on Nano-style boards. | |
ADC7 | Analog | Analog-only input available on Nano-style boards. | |
5V | Power | Main regulated 5V rail used by the board logic and many modules. | |
!RESET | GPIOInternal | Reset line. Pull low momentarily to restart the microcontroller. | |
GND | GND | Common electrical ground reference for the board and connected devices. | |
VIN | Power | Voltage input pin used to feed the onboard regulator from an external supply. | |
PB4 | GPIOSPI | Digital GPIO and SPI MISO line used to receive data from SPI peripherals. | |
PB3 | GPIOSPIPWM | Digital GPIO, SPI MOSI line and PWM-capable output. | |
PB2 | GPIOSPIPWM | Digital GPIO, SPI slave-select line and PWM-capable output. | |
PB1 | GPIOPWM | Digital GPIO with PWM output support. | |
PB0 | GPIO | General-purpose digital I/O pin. | |
PD7 | GPIO | General-purpose digital I/O pin. | |
PD6 | GPIOPWM | Digital GPIO with PWM output support. | |
PD5 | GPIOPWM | Digital GPIO with PWM output support. | |
PD4 | GPIO | General-purpose digital I/O pin. | |
PD3 | GPIOPWM | Digital GPIO with PWM output and external interrupt support. | |
PD2 | GPIO | Digital GPIO with external interrupt support. | |
GND | GND | Common electrical ground reference for the board and connected devices. | |
!RESET | GPIOInternal | Reset line. Pull low momentarily to restart the microcontroller. | |
PD0 | GPIOUART | UART receive pin connected to the USB serial interface on many Nano-compatible boards. | |
PD1 | GPIOUART | UART transmit pin connected to the USB serial interface on many Nano-compatible boards. |
Recommended parts
Boards, cables and modules commonly used with Arduino Nano FTDI projects.
A compact ATmega328P board for breadboard prototypes and permanent embedded projects.
Cost-effective Nano-compatible boards for workshops, classrooms and multi-board projects.
USB cable for programming and powering Mini USB Nano FTDI-style boards.
Sensor modules for testing the A4/SDA and A5/SCL I2C bus.
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References
Manufacturer references and technical documentation.
| Chip | Role | Manufacturer | Notes | Link |
|---|---|---|---|---|
ATmega328P | Microcontroller | Microchip | Main AVR MCU used on Nano-compatible boards. | Datasheet |
FT232RL / FTDI bridge | USB serial bridge | FTDI | Common USB-to-serial interface on FTDI variants. | Datasheet |
AMS1117 or equivalent | Voltage regulator | Multiple | Regulator varies by board clone/vendor. | Datasheet |
Related
Check 5V, 3.3V, VIN, and GND before connecting external modules.
Related
SPI, I2C, and UART share pins with general-purpose digital IO.
Related
Nano-compatible boards may use FTDI, CH340, or CP2102 USB serial bridges.
