8051 micro controller and AVR micro controllers are in 2 different families. AVR consist ATmega32, and in both those some ports do the same tasks, for an example:- PORT D – bidirectional I/O port. I tried this in some lecture materials, but I couldn’t find exact definiens. Then I tried on YouTube, but most of the videos are not in English Language, So, due to language barriers, I couldn’t get the exact briefings what I expect. I expect a clear and simple English briefing to this matter.