有哪些信誉好的足球投注网站- 1、本文档共46页，可阅读全部内容。
- 2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
- 3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
查看更多
摘 要
LED（Light Emitting Diode）行业已成为一个快速发展的新兴产业，市场空间巨大，前景广阔。
本实用性强操作简单AT89C51， LED， 点阵， 汉字显示
Abstract
This design in view of the present LED display monitor, in national dividends many domains obtain in the widespread quotation situation, has carried on this paper design after the investigation. This article elaborated in detail with monolithic integrated circuit development LED lattice demonstration in aspect and so on advertisement, propaganda applications, introduced the LED lattice demonstration hardware design mentality, hardware circuit each part of functions and the principle, the corresponding softwares programming emphatically, as well as detailed operating instructions and work flow.
This design divides into six parts, the primary coverage is the system macro analysis, the system hardware design, the system software designs three parts. The system macro analysis is this article foundation, the system hardware design is this article key, is this design hard core, this part first simply describes the system hardware principle of work, and attaches by the system hardware design diagram, elaborated various hardware interface technology which and each interface module function and the work process this graduation project applies. The system software design is this article sublimation. this article composes the guiding ideology is the software and hardware unifies, take the hardware as the foundation, carries on various functional module the design. This design usability is strong, simplicity of operator, extended function.
Key words: AT89C51, LED, the lattice, the Chinese character demonstrates 目 录
1 绪 论 2
1.1 LED显示屏的发展背景及国内外研究现状 2
1.2 设计目标及采取的方案 2
1.2.1 本设计的目标 2
1.2.2 本设计采取的方案 3
1.3 文章的结构安排 3
2 系统总体分析 5
2.1 显示部分 5
2.2 驱动电路的选择 6
2.3 电源模块选择 6
2.4 工作原理 6
2.5 总体设计 7
3 系统硬件设计 8
3.1 AT89C51芯片的介绍 9
3.2 时钟电路 13
3.3 复位电路 13
3.4 驱动电路设计 14
3.4.1 2N5551与2N5401三极管的主要参数 14
3.4.2 8255芯片的介绍 15
3.5 键盘模块设计 17
3.6点阵式汉字LED显示屏设计 18
3.6.1 LED的特点以及常用的参数 18
3.6.2 LED电子显示屏 20
文档评论（0）