MCU MCU, also known as single-chip microcomputer, is to appropriately reduce the frequency and specifications of the central processing unit, and integrate peripheral interfaces such as memory, counter (Timer), USB, A/D conversion, UART, PLC, DMA, and even LCD drive circuits. All of them are integrated on a single chip to form a chip-level computer, which can be controlled in different combinations for different applications. Such as mobile phones, PC peripherals, remote controls, automotive electronics, industrial stepper motors, robotic arm control, etc., MCU can be seen.