有哪些信誉好的足球投注网站- 1、本文档共69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
目 录
第一章 设计方案论证················································1
1.1功能要求·····················································1
1.2方案确定·····················································1
1.2.1单片机芯片的选择方案和论证·······························1
1.2.2显示模块选择方案和论证···································2
1.2.3时钟芯片的选择方案和论证·································2
1.2.4电路设计最终方案确定·····································2
第二章 主控制器和外围器件··········································3
2.1AT89S52单片机················································3
2.2DS1302时钟芯片···············································3
2.2.1DS1302芯片介绍···········································3
2.2.2DS1302 的应用·············································6
2.3数码管LED····················································7
2.4译码器74HC138················································7
2.5锁存器74LS244················································7
第三章 硬件设计····················································8
3.1电路设计框图·················································8
3.2系统概述·····················································8
3.3电源设计·····················································8
3.4单片机的复位电路·············································8
3.5单片机系统的晶振电路·········································9
3.6主电路设计··················································10
第四章 软件设计···················································12
4.1主程序设计··················································12
4.2键盘子程序设计··············································13
4.3日历时钟子程序设计··········································15
4.4显示子程序设计··············································17
第五章 系统调试···················································18
5.1软件调试····················································18
第六章 结论·······················································21
致谢······························································22
参考文献··························································23
附录··························
文档评论（0）