- Chinese name
- control unit
- Foreign name
- Control Unit
- Relevant definitions
- Harvard structure, von Neumann structure
- Of
- One of the CPU components
The control unit (CU), in English, is one of the CPU components and is sometimes installed outside the CPU. Its basic function is to fetch instructions from memory, analyze instructions and execute instructions.
The control unit realizes one or more control laws Control instrument or Control components 。 For example: Multiplexing control unit 、 Agent Settings Control Unit 。 No matter what kind of control unit, the principle is to control each part of the CPU through the control signal sent by the control unit. Control units can generally be divided into the following two categories.
According to the user's pre programmed program storage Take out each instruction from the, place it in the instruction register IR, and pass the instruction decoding (Analysis) Determine what operations should be carried out, and then Operation controller OC， Send micro operation to corresponding parts according to the determined time sequence control signal 。 Operation controller OC mainly includes control logic such as beat pulse generator, control matrix, clock pulse generator, reset circuit and start stop circuit. 
