Description

Specification Details
Main microcontroller ATmega328P, 8-bit AVR
Processor package SMD, typically TQFP-32; soldered to the board
USB interface chip CH340G
Clock frequency 16 MHz
Operating / logic voltage 5 V DC
USB power supply 5 V through USB Type-B
Recommended external input Typically 7–12 V DC through barrel jack or VIN
Digital I/O pins 14
PWM outputs 6 — pins 3, 5, 6, 9, 10 and 11
Analog inputs 6 — A0 to A5
ADC resolution 10-bit
Flash memory 32 KB; typically 0.5 KB reserved for the bootloader
SRAM 2 KB
EEPROM 1 KB
Communication interfaces UART, SPI and I²C
Programming Arduino IDE via USB; ICSP programming supported
Board selection in IDE Arduino Uno
Onboard features Reset button, power indicator, TX/RX indicators and pin-13 LED
Expansion Standard Uno R3 header layout for compatible shields
Applications Sensor interfacing, robotics, automation, data logging and educational projects