There are many definitions of SOC. Because of its rich connotation and wide range of applications, it is difficult to give an accurate definition. Generally speaking, SOC is called system-on-a-chip, also called system on a chip, which means that it is a product, an integrated circuit with special goals, which contains a complete system and all the contents of embedded software. At the same time, it is also a technology to realize the whole process from determining the system function to software / hardware division and completing the design.