Download Arduino Pinout 328P Gallery. click the image to enlarge it. Port d has pins d0 to d7.

Using Arduino As An Isp To Program A Standalone Atmega 328p Including Fuses Void Your Warranty
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The nano is inbuilt with the atmega328p microcontroller, same as the arduino uno. It is the most popular of all avr controllers as it is used in arduino boards. It has total 28 pins out of which some are gpio (general purpose input / output) pins and some are power pins.

Descriptionpinout of arduino board and atmega328pu.svg.

D3, d5, d6, d9, d10, d11. It has total 28 pins out of which some are gpio (general purpose input / output) pins and some are power pins. Descriptionpinout of arduino board and atmega328pu.svg. Atmega 328 microcontroller is an eight bit microcontroller based on the risc (reduced instruction set computing) architecture.