OC2B(PWM - Timer/Counter2 Output Compare Match B Output) PC6 can only be used as I/O pin when RSTDISBL Fuse is programmed. We will describe functions of each pin in below table. Many pins of the chip here have more than one function. It is the most popular of all AVR controllers as it is used in ARDUINO boards.ĪTMEGA328P is a 28 pin chip as shown in pin diagram above. ATMEGA328P is an 8-bit microcontroller based on AVR RISC architecture. ATMEGA328P is high performance, low power controller from Microchip.