国家半导体股份有限公司把输入/输出设备接到微处理机,乍—看常使人困惑。实际并不很难。在考虑微最大难题之一.是弄清楚如何把微处理机连接到它围周的设其中某些是模拟性的数据和状态信息必须从各种信息源引人,数据和控制信号需要送到伺一台或另外的设备。直接程序控制是粗这些接口最简单的方法,但是这种方法秘了处理机、用.当宣来提高计算澎1的方题能力时 National Semiconductor Co., Ltd. I / O devices connected to the microprocessor, at first glance often make people confused. Not really difficult. One of the biggest challenges in considering is to figure out how to connect a microprocessor to its perimeter. Some of the data and state information that is analog must be introduced from a variety of sources, and data and control signals need to be sent Serve one or another device. Direct program control is the easiest way to rough these interfaces, but this method can not be used by processors, but when it comes to improving the computational power of computing