接口电路(简称接口)是微型计算机进行输入和输出的设备,是微机用于控制或检测的专用芯片。是微机用于生产过程自动化的关键部件,是全书的核心与重点,也是全书的难点。常用的接口芯片是Z80—CTC定时器/计数器,Z80—PIO并行输入/输出接口,该二个接口均为可编程接口,即软、硬结合的芯片。此外微机与模拟量通讯的接口 Interface circuit (referred to as the interface) is a microcomputer input and output devices, the computer is used to control or detect the dedicated chip. Is the computer used to produce the key components of the process automation is the core and focus of the book, but also the difficulty of the book. Commonly used interface chip is the Z80-CTC timer / counter, Z80-PIO parallel input / output interface, the two interfaces are programmable interfaces, that is, soft and hard combination of chips. In addition, computer and analog communication interface