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51单片机的串行口扩展方法
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2009-06-15
fansz
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在以单片机为核心的多级分布式系统中，常常需要扩展单片机的串行通信口，本文分别介绍了基于SP2538 专用串行口扩展芯片及Intel8251 的两种串行口扩展方法，并给出了实际的硬件电路原理及相应的通信程序段。
关键词：串口扩展；单片机；SP2538；Intel8251
Abstract: The serial interface of microcontroller is often to be expanded in multi-step distributed system based on single-chip microcomputer. In this paper, two solutions of serial expanding based on expert serial interface expanding chip sp2538 and Intel8251 are introduced, and the multi-serial interface hardware circuit and the corresponding communication programs based on microcontrollers are listed.
Keywords: Serial-expanding； Single-chip Microcomputer； SP2538； Intel8251
关键词：串口扩展；单片机；SP2538；Intel8251
Abstract: The serial interface of microcontroller is often to be expanded in multi-step distributed system based on single-chip microcomputer. In this paper, two solutions of serial expanding based on expert serial interface expanding chip sp2538 and Intel8251 are introduced, and the multi-serial interface hardware circuit and the corresponding communication programs based on microcontrollers are listed.
Keywords: Serial-expanding； Single-chip Microcomputer； SP2538； Intel8251
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