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Arduino Uno vs Arduino Mega: Chapter 2

The differences between Arduino UNO and Arduino Mega 2560 are as follow. The Arduino UNO is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button.

 

Arduino Uno

The UNO differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter.

 


 Arduino Mega 2560

The Arduino Mega 2560 is a microcontroller board based on the ATmega2560 (datasheet). It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. The Mega is compatible with most shields designed for the Arduino Duemilanove or Diecimila. The Mega 2560 is an update to the Arduino Mega, which it replaces. 

 

FeaturesArduino UnoArduino Mega (1280)Arduino Mega 2560
Microcontroller (MCU) ATmega328P
(Datasheet)		 ATmega1280 ATmega2560
(Datasheet)
Operating Voltage of the Microcontroller 5 V 5 V 5 V
Typical Supply Voltage for the board 7 V – 12V 7 V – 12 V 7 V – 12 V
Digital I/O Pins 14 (includes 6 PWM outputs) 54 (includes 15 PWM outputs) 54 (includes 15 PWM outputs)
PWM outputs 6 15 15
Analogue Input Pins 6 16 16
Max DC Current per I/O Pin 20 mA 20 mA 20 mA
Max DC Current for 3.3V Pin 50 mA 50 mA 50 mA
Flash memory of MCU 32 KB 128 KB 256 KB
Bootloader footprint 0.5 KB 4 KB 8 KB
SRAM of MCU 2 KB 8 KB 8 KB
EEPROM of MCU 1 KB 4 KB 4 KB
Clock Speed 16 MHz 16 MHz 16 MHz
Board Dimensions (Length) 68.6 mm 101.5 mm 101.5 mm
Board Dimensions (Width)53.4 mm53.4 mm53.4 mm

 

 

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Location: Thiruvananthapuram, Kerala, India

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