23+ Atmega328Pb Arduino Pinout Pictures. click the image to enlarge it. Atmega 328 microcontroller is an eight bit microcontroller based on the risc (reduced instruction set computing) architecture.

Installing An Arduino Bootloader Learn Sparkfun Com
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It has total 28 pins out of which some are gpio (general purpose input / output) pins and some are power pins. Both int0 and int1 are mapped to pins 2 and 3. For those of you who are using an atmega328 with the arduino bootloader code on your own circuit board here is the pinout details which shows the chip pin numbers and the associated arduino pins.

For those of you who are using an atmega328 with the arduino bootloader code on your own circuit board here is the pinout details which shows the chip pin numbers and the associated arduino pins.

There are two external interrupt pins on the atmega168/328 called int0 and int1. This core uses the standard arduino uno pinout and will not break compatibility of any existing code or libraries. Arduino nano has similar functionalities as arduino duemilanove but with a different package. click the image to enlarge it.