| 便携式测量仪大容量RAM及USB接口的设计 |
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| 引用本文： | 谭云福,陈雅静.便携式测量仪大容量RAM及USB接口的设计[J].现代电子技术,2006,29(2):97-99. |
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| 作者姓名： | 谭云福 陈雅静 |
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| 作者单位： | 1. 燕山大学,信息科学与工程学院,河北,秦皇岛,066004
2. 北京邮电大学,电子工程学院,北京,100876 |
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| 摘 要： | 以CH372A(USB接口)和LH5P8512(伪静态RAM)芯片为例,介绍基于AT89C51微处理器的便携式测量仪大容量RAM及USB接口的设计方案。对RAM存储器和USB接口电路的组成和管理做了详细说明,并对CH372A的命令字和通信模式做了介绍,针对数据上传和下传通信程序以及API函数做了系统地论述。实践证明,该设计方案硬件成本低、软件编写简便,有通用性。
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| 关 键 词： | USB接口 CH372A LH5P8512 伪静态RAM |
| 文章编号： | 1004-373X（2006）02-097-03 |
| 收稿时间： | 2005-11-01 |
| 修稿时间： | 2005年11月1日 |
Design of Mass RAM and USB Interface in Portable Measurement Instrument |
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| TAN Yunfu,CHEN Yajing.Design of Mass RAM and USB Interface in Portable Measurement Instrument[J].Modern Electronic Technique,2006,29(2):97-99. |
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| Authors: | TAN Yunfu CHEN Yajing |
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| Affiliation: | 1. School of Information Science and Engineering, Yanshan University, Qinhuangdao, 066004, China; 2. School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing, 100876,China |
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| Abstract: | The design project of mass RAM and USB interface in portable measurement instrument is introduced based on AT89C51 microprocessor.CH372A(USB Port)and LH5P8512(Pseudo Static RAM) chip are the examples.Not only it introduces the composition and management of RAM memory and USB interface circuit in detail,but also mentions the command words and communication mode of the CH372A.The communication programe in updata and downdata are also expounded.API function is explained in system as well.The practice proves that this design project reduces the cost of hardware,simplicies the software compilation and is full of common use. |
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| Keywords: | USB interface CH372A LH5P8512 pseudo static RAM |
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