The figure on the right shows the hardware configuration of a microcontroller.
First of the five elements, the CPU that takes charge of calculation and control will be explained later.
The CPU is generally called the "center of the microcontroller" or the "brain of the microcontroller".
CPU is an abbreviation that combines C of "Central", P of "Processing", and U of "Unit".
It can be said that the CPU is located in the center of the microcontroller and is the part for processing.
“Processing" can mean adding or subtracting data.
For this reason, the CPU is called the central processing unit