Realization of Serial Port Expansion Circuit

摘要：

　　This article describes the design of a interface chip with serial port expansion circuit of computer in industrial applications.It is used to connect with 422 and RS232 interfaces.Circuits involved several major chip such as the interface of 422 and RS232 and UART(Universal Asynchronous Receiver Transmitter)16C550 Inside the computer.Paper describes the composition of the hardware circuit,theory and implementation and initialization programming of URAT interface chip.We use interface chip with the FIFO to the circuit,It improves the efficiency of the application software,And it solves the problem of insufficient of computer serial port.

关键词： 422 interface RS232 interface URAT interface chip

作者: Xuemei Zhao

作者单位: Shengda Economy & Trade Management College of Zhengzhou, Zhengzhou, Henan, China

会议类型: 国际会议

会议名称: 3rd International Conference on Frontiers of Manufacturing and Design Science(第三届制造与设计科学前沿国际会议(ICFMD))

会议地点: 香港

会议语种:英文

页码: 1597-1601

在线出版日期: 2012-12-11（万方平台首次上网日期，不代表论文的发表时间）