Refers to the microcontrol unit.
Microcontroller Unit (Microcontroller Unit; MCU (Single Chip Microcomputer), also known as a single chip microcomputer, is a Central Process Unit (Central Process Unit; The frequency and specifications of CPU are appropriately reduced, and peripheral interfaces such as memory, counter (Timer), USB, A\/D conversion, UART, PLC, DMA, and even LCD driver circuits 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, to automotive electronics, industrial stepper motors, robot arm control, etc., can be seen in the MCU figure.