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ATMega328 – With Bootloader for “ARDUINO UNO”
Here are few of its features:
Atmega328 has 28 pins in total.
It has 3 Ports in total which are named as Port B, Port C and Port D.
Port C is an analogue Port and it has six pins in total. So, in simple words, ATmega328 has 6 analogue pins.
Port B and Port D are digital ports and have 7 pins each.
So, in total ATmega328 has 14 digital pins.
It also supports Serial Communications, we can perform serial communication via Pin # 2 (RX) and Pin # 3 (TX).
It also supports SPI Protocol.
It needs a crystal oscillator for generating the frequency. You can use crystal oscillator ranging from 4MHz to 40 MHz.
Arduino UNO board uses 16MHz crystal oscillator.