Arduino Uno R3 ATmega328p Micro controller

• It has a High performance, low power AVR® 8-bit microcontroller

Advanced RISC architecture

• It has 131 powerful instructions – most single clock cycle execution
• It also has a 32 x 8 general purpose working registers
• Also has a Fully static operation
• Up to 16MIPS throughput at 16MHz
• In addition to that, it has an On-chip 2-cycle multiplier

High endurance non-volatile memory segments

• It has a 32K bytes of in-system self-programmable flash program memory
• Has 1Kbytes EEPROM
• Also has a 2Kbytes internal SRAM
• Write/erase cycles: 10,000 flash/100,000 EEPROM
• In addition, it has an Optional boot code section with independent lock bits
• In system programming by on-chip boot program
• True read-while-write operation
• Lastly, has a Programming lock for software security

Peripheral features

• Has a Two 8-bit Timer/Counters with separate prescaler and compare mode
• Also has a One 16-bit Timer/Counter with separate prescaler, compare mode, and capture mode
• Real time counter with separate oscillator
• To add on that, has Six PWM channels
• Programmable serial USART
• On chip analog comparator

 Special microcontroller features

• It has a Power-on reset and programmable brown-out detection
• Also has an Internal calibrated oscillator
• Six sleep modes: Idle, ADC noise reduction, power-save, power-down, standby, and extended standby

I/O and packages

• Has 23 programmable I/O lines
• It has a 32-lead TQFP, and 32-pad QFN/MLF
• Operating voltage for 2.7V to 5.5V for ATmega328P
• Automotive temperature range of –40°C to +125°C
• 0 to 8MHz at 2.7 to 5.5V (automotive temperature range: –40°C to +125°C)
• 0 to 16MHz at 4.5 to 5.5V (automotive temperature range: –40°C to +125°C)
• Moreover, has a Low power consumption
• Active mode: 1.5mA at 3V – 4MHz
• Lastly, has a Power down mode of 1µA at 3V

Arduino mega

Datasheet