Can anyone help me explain how it works, how it works and what it means?

There is no working principle to explain the peripheral circuit of the single-chip microcomputer, because in addition to the function of each pin is set by the program, the function of some special function pins is determined by the internal circuit and cannot be changed, such as power supply, ground, serial or parallel communication pins, etc.

As for the IO port, it is up to the program to decide whether it is used for input or output. When used as an input, it is up to the program to decide what an input of 0 means and what an input of 1 represents. Similarly, as an output port, it is up to the program to determine what an output of 0 represents, what an output of 1 represents, and what a series of pulses of output represent.

Therefore, all circuits composed of single-chip microcomputers, except for the people involved in the design and programming, no one else can understand its internal situation, and can only deter from the complete peripheral circuits what the circuit is about, and the rest are in the clouds.

Therefore, with a few input buttons (input 0 and 1), the gods cannot tell, let alone have a principle.

For example, P17 pin of this circuit (the bottom pin on the left) is 0 when the button is pressed, which is equivalent to entering a command in P17.

It looks like a part of the elevator control circuit, and it is displayed by the number of floors. But there is no procedure to explain!

Such a simple circuit still asks for help, don't be busy if you don't understand the software, and ask in vain.

The working principle is the basic law of work, which mostly refers to the reason or law of the operation of things.

Principle: A basic law of universal significance in the natural sciences and social sciences. It is based on a large number of observations and practices, and is derived through induction and generalization.

It can not only guide practice, but also must withstand the test of practice. Function, refers to the beneficial role played by a thing or method.

The importance of how it works

For a machine, the working principle is what it wants to do and what it is doing, which is a working idea.

For example, the working principle of the paper crimping machine is to use a thin knife to cut the cardboard, and the cardboard cut out is smooth and clean, without flattening, neat edges, etc., and the straightness is good, and the overall quality and appearance of the cardboard are improved. In addition, it can also sharpen the knife while slitting, which not only maintains the strength of the blade, but also improves the work efficiency.

As long as there is a working principle, when encountering a variety of problems, you can use it as a basis and make changes of different sizes to easily solve the problem. But if not, you'll need to remake your plan every time you run into a problem. Therefore, the working principle is also very important.

The working principle refers to the basic laws of work. It is a basic law of universal significance in the natural sciences and social sciences. It is based on a large number of observations and practices, and is derived by induction and generalization.

It can not only guide practice, but also must withstand the test of practice.

Usually refers to a fundamental law of universal significance in a field, sector, or science. The principles of science are based on a large number of practices, so their correctness can be tested and determined by experiments, and from the principles of science, various specific theorems and propositions can be deduced, so as to play a guiding role in further practice.

WorkflowWork flow refers to the methods and means that people take to achieve certain goals and effects in the process of practice. It means that everything is recorded, planned, executed, results, and improved, and in the process it is always goal-driven and evidenced by data.

Working Mechanism:

Explanation 1: It refers to the internal working mode of each element in a certain system structure and the operating rules and principles of interconnection and interaction between various elements under certain environmental conditions in order to achieve a specific function.

Explanation 2: Mechanism refers to the reason and reason for the change of things. In chemical kinetics, the term "mechanism" refers to the depiction of chemical processes in terms of the binding relationship of atoms.

In chemical vapor deposition, the meaning of mechanism is much broader. If its process is dynamically controlled, the mechanism refers to the surface process at the atomic level.

How it works:1The original reason of writing, the most basic, the most fundamental theory, the universal and most basic law in a certain field or discipline, which can be used as the basis for other laws.

2.The principle is based on a large number of practices, so its correctness is directly tested and determined by practice. Such as Pauli incompatibility principle, relativity principle, etc.

The difference between the two is that the working mechanism mostly refers to the process of the reason and reason for the operation and change of things, and the working principle mostly refers to the reason or law of the operation of things.

Upstairs is right, very professional and comprehensive.