Microcontroller Unit (MCU), also known as Single Chip Microcomputer or Single Chip Microcomputer, appropriately reduces the frequency and specification of the Central Process Unit (CPU), and integrates memory, timer, USB, A/D conversion, UART, PLC, DMA and other peripheral interfaces, even LCD drive circuits on a single chip to form a chip level computer, Do different combination control for different applications. MCU can be seen in mobile phones, PC peripherals, remote controllers, automotive electronics, industrial stepping motors, robot arm controls, etc.