CPU — A closer look!

In the last lesson, we were introduced to the CPU. Here is a quick recap: The CPU is an integrated circuit which is made up of transistors and connects to the outside by the Address bus and the External data bus. For this lesson, we will take a more in-depth look at the CPU.

So let’s dive into the inner workings of the CPU.


There are usually multiple registers within a CPU, and they can take on different roles; but their purpose, simply, is for storage. Some registers are used for arithmetic operations, such as code modification.

The maximum number of bits a register can process, simultaneously, will determine its size. Therefore, a 32 bits register can only process workloads no larger than 32 bits in size.