Description
Arduino UNO R3 ATmega 328P Compatible with Arduino
| Micro-controller | ATmega328. |
| Analog I/O Pins | 6 |
| Digital I/O Pins | 14 |
| PWM Output Pins | 6 |
| Clock Speed | 16 MHz |
| DC Current per I/O Pin |
DC Current per I/O Pin: 40 mA; For 3.3V Pin: 50 mA |
| Operating Voltage |
5 V |
| Flash Memory | 32 KB (ATmega328) of which 0.5 KB used by the bootloader |
| EEPROM | 1 KB (ATmega328) |
| SRAM | 2 KB (ATmega328) |
This UNO R3 Board is compatible with Arduino and is based on Atmega328. The Uno R3 can be powered via a USB connection or with an external power supply.
The Uno R3 has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). An ATmega16U2 on the board channels this serial communication over USB and appears as a virtual com port to software on the computer.