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8051 Ports

The 8051 micro-controller comes in different shapes and sizes, depending on the model (variant) that you choose. I talked about the most common pin configuration for 8051 in my previous post.  These pins can serve as either input or output to the micro-controller. They can be used independently or in groups. When few pins are combined together to form a group, it’s called a port. Let’s discuss the ports available in 8051.

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8051 Pin Configuration

8051 Pin Configuration

Let’s get started. I assume you are already familiar with the concept of micro-controllers (specially the 8051) and have some rough idea about the internal architecture because I will avoid going into it. I will just stick to how-to-use tricks for the 8051. However, for the sake of brief introduction, let me highlight the important aspects of the 8051 microcontroller. (more…)