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目 录 引言 paper51.com 一、系统简介········································································································· 1 paper51.com 1.1 明确设计系统的功能要求······································································ 1 内容来自www.paper51.com 1.2 要实现系统的逻辑功能·········································································· 1 内容来自论文无忧网 www.paper51.com
二、芯片介绍········································································································· 1 内容来自www.paper51.com 2.1 74LS161芯片的功能·············································································· 1 paper51.com 2.2 74LS192芯片的功能·············································································· 2 内容来自www.paper51.com 2.3 系统所需元件介绍·················································································· 3 内容来自论文无忧网 www.paper51.com 三、系统功能集成原理························································································· 4 copyright paper51.com
3.1 集成系统的工作原理·············································································· 5 内容来自www.paper51.com 3.2 系统电路状态分析·················································································· 5 内容来自论文无忧网 www.paper51.com 四、电路设计过程及注意事项············································································· 6 paper51.com 4.1 实验的基本过程······················································································ 6 copyright paper51.com 4.2 实验中操作规范和常见故障检查方法·················································· 7 http://www.paper51.com 4.3 焊接过程及注意事项·············································································· 7 内容来自www.paper51.com 4.4 系统功能调试及实现·············································································· 8 内容来自论文无忧网 www.paper51.com
五、总结················································································································· 8 内容来自论文无忧网 www.paper51.com 参考文献 copyright paper51.com 致谢 http://www.paper51.com 一、系统简介 内容来自www.paper51.com
1.1明确设计系统的功能要求 内容来自论文无忧网 www.paper51.com 根据篮球比赛的实际情况，有得1分、2分和3分的情况，还有减分的情况，电路要具有加、减分及显示功能。 内容来自www.paper51.com
1.2要实现系统的逻辑功能 内容来自www.paper51.com 开始计分时，按一下复位钮S，使计数器74LS192和74LS161全部清零。然后根据比赛情况进行计分，可以实现加/减1、2、3分。同时具有保持显示分数的功能。计分分数为三位显示，即可以记录显示000到999之间的任意整数。其计分原理是通过记录脉冲个数来实现计分以，可能通过加3分加2分加1分按钮来实现加/减分过程。 内容来自www.paper51.com |