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一、接口接口是两个不同系统的交换部分,如两种硬设备的交换装置;两个程序块的接口程序;两个或多个程序共同访问的存贮区等。而外围接口是连接计算机与输入输出设备之间的控制逻辑部分。二、MC6820的外围接口适配器(PIA)1.作用:为外围部件与 MC 6800间的接口提供一种通用的方法,使其与大多数外围部件接口时均不需要任何外部逻辑电路。2.功能:其功能是可编程序的,就是说
First, the interface Interface is the exchange of two different parts of the system, such as two hard-device switching device; two program interface program; two or more programs commonly accessed storage area. The peripheral interface is connected between the computer and the input and output devices control logic. Peripheral Interface Adapter (PIA) of MC6820 1. Function: Provide a common method for interfacing peripheral components with MC6800 so that they do not need any external logic when interfacing with most peripheral components. 2. Function: Its function is programmable, that is to say