要点提示:对于数字电路或含有数字电路的电路图,看懂它的关键是,通过分析各种输入信号状态与输出信号状态之间的逻辑关系,搞清楚电路的逻辑功能。一是数字集成电路引脚的主要作用是建立集成电路内部电路与外围电路的连接点,发挥电路的正常功能。二是数字电路输入端,包括数据输入端和控制输 Tip: For digital circuits or circuits containing digital circuits, the key to understand it is to understand the logic of the circuit by analyzing the logic between the various input signal states and the output signal states. First, the main role of digital integrated circuit pins is to establish the connection point of the integrated circuit internal circuit and the peripheral circuit, play the normal function of the circuit. Second, the digital circuit input, including data input and control input