Download Arduino Nano Every Pin Layout
Background. D2 is just a digital pin, not a pwm pin. Arduino uno is a microcontroller board based on atmega328 and comes with 14 digital i/o pins out of which 6 are pwm.
Both arduino uno and arduino nano come with same functionality with little difference in terms of pcb layout, size and form factor. There are totally 14 digital pins and 8 analog pins on your nano board. click the image to enlarge it.
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D2 is just a digital pin, not a pwm pin. The nano is inbuilt with the atmega328p microcontroller, same as the arduino uno. Arduino nano has 14 digital i/o pins, 8 analog reference pins and has a clock frequency of 16mhz 18. So, usage as analog inputs is not recommended.