Component function to see the pin function decomposition look at the module these mapping skills you made?

A digital circuit is a circuit that implements a certain logic function, called a logic circuit, also known as a switching circuit. Transistors in such circuits typically operate in a switching state.

Digital circuits can be composed of discrete components (such as inverters, self-excited multivibrators, etc.), but most of them are now composed of integrated circuits (such as AND gates, OR gates, etc.). To understand the digital circuit diagram, first of all, you should master some basic knowledge of digital circuits; secondly, understand the various logical symbols and output and input relationships of binary logic units; then you should also master some knowledge of logical algebra. With these basic knowledge, it lays a good foundation for understanding digital circuit diagrams.

By reading the circuit manual to understand the structure, function, and use of the logic circuit, you can also read the truth table to understand the logical relationship between "yes" or "no" between the output and the input, and master the logic functions of each unit module.

Integrated circuits with various logic functions are often used in digital circuits, which makes the entire circuit simpler and more reliable. But it also brings some difficulties for understanding. Because you can't see the internal components and circuit components of the integrated circuit, you can only see many external pins. These pins have their own functions. These pins are connected with other external components or circuits to achieve certain functions. . In fact, many times you do not need to know the internal circuit composition of the integrated circuit, just need to know the function of the external pins. The functions of each pin of the integrated circuit are marked with text. If no text description or parameter is given in the circuit, the relevant manual should be consulted to understand the logic function of the integrated block and the function of each pin. For some commonly used integrated circuits, such as the commonly used operational amplifier LM324, four 2-input NAND gates 74LS00, 555 time base circuit, etc., the reader should remember the function of each pin, which is helpful for fast and accurate mapping.

The digital circuit can divide the system into several functional modules according to the signal flow direction. Each module performs relatively independent functions, analyzes the interaction state of the modules, and lists the input and output logical truth tables of each module if necessary.

Connect the modules to analyze the complete working process of the circuit from input to output. If necessary, draw the relevant working waveform diagram to help analyze and understand the logic function of the circuit.