The basic function of the microcomputer controller is to control the various components of the machine to work in harmony. The computer controller is the nerve center of the computer, directing all components in the machine to automatically coordinate their work. Under the control of the controller, the computer can automatically perform a series of operations according to the steps set by the program to complete specific tasks.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
The basic function of the microcomputer controller is______.
A. Perform arithmetic and logical operations
B. Store various control information
C. Maintain various control states
D. Control all parts of the machine to work in harmony
Correct answer: D
Answer analysis
Option A is the function of the arithmetic unit ;Option B is the memory function. The controller contains a status register, which is mainly used to maintain the running status of the program: Option C is the function of the controller, but it is not the basic function of the controller. The basic function of the controller is to control the various components of the machine to work in a coordinated manner, so option D is correct answer.
Extended information:
The computer controller is the nerve center of the computer, directing all components in the machine to automatically coordinate their work. Under the control of the controller, the computer can automatically perform a series of operations according to the steps set by the program to complete specific tasks.
Function:
(1) Sequencing. The instructions that make up the program must be executed in a certain order and cannot be messed up.
(2) Timing. An electronic computer is a complex machine, composed of numerous components and parts, and different signals follow different paths. In order for these elements and components to work in harmony, the system must have a unified time standard - clock and beat. The clock and beat in a computer are provided by an oscillator. The operating frequency of the oscillator is called the clock frequency. Obviously, the higher the clock frequency, the faster the computer will work.
The combination of sequencing and timing is called timing sequence.
(3) Operation control. The controller should be able to send operation control signals to relevant components at the specified beat according to the content specified in the instruction.
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