The core (Die), also known as the kernel, is the most important part of the CPU. The uplifted chip in the CPU center is the core, which is manufactured by using a single crystal silicon with a certain production process. All calculation, acceptance/storage commands and processing data of the CPU are executed by the core. All kinds of CPU cores have a fixed logic structure, and logical units such as L1 cache, L2 cache, execution unit, instruction level unit, and bus interface all have a scientific layout.
In order to facilitate the management of CPU design, production, and sales, CPU manufacturers will give corresponding code numbers to various CPU cores. This is the so-called CPU core type.