ATmega 328P ( Original )

Description

• Atmega328P 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.