毕业设计下载

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随着计算机网络技术和芯片技术的发展，控制芯片的性能大幅度提高，成本不断减低，??????????对该领域的发展产生重要的影响。 130m。 2 总体设计

CAN总线控制器，????????局域网的核心部件[1]???? 3 硬件设计

本系统硬件主要有三大模块组成：微处理器系统、键盘和显示模块和CAN模块。

3.1 微处理器系统本系统的微处理器采用P89LPC932芯片，是LPC900系列单片机的其中一个?????????可靠性设计。 3.1.1 时钟电路是较为常用的单片机外围时钟电路，?? 图3-1 单片机外围时钟电路 第 1 页

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武汉职业技术学院毕业论文 3.1.2 复位电路

1 2 ????? ????? 3.1.3 电压转换电路 由于我们???????????所需电压。 3.2 键盘和显示模块

????? 3.2.2 LED数码管 ????? 3.3 CAN模块 CAN3.3.1 CAN独立控制芯片 表3-1 各极电流、电压典型值 t 0 T/4 ui/mV 0 25 uBE/V 0.7 0.725 iB/μA 100 150 ib/μA 0 50 iC/mA 5 7.5 ic/mA 0 2.5 uCE/V 10 7.5 uce/V 0 －2.5 3.2.1 键盘 第 2 页 共 11页 篇三：毕业设计 毕业设计

院系:__________________ 课题:__________________ 班级:__________________ 学号:__________________ 姓名:__________________ 指导老师:______________ 完成日期:___年___月____日 目录

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................................ 18 Old Sayings

An old saying has it that beauty is in the eye of the beholder. I doubt whether any beholder， with the possible exception of his mother， could see any beauty in Cliff Sloane. He was short ， skinny and had an ugly face under a thatch of ginger hair. When he came to live in our village he proved a bit of a puzzle. He lived alone， in the tiny cottage left empty by the death of old Daddy Wills; and he was so reluctant to divulge information about himself that even Lizzie Allen at the store failed to get any more from him that that he was single. Given his looks， that surprised no one. Lizzie also learned that he came for Cornford and that he didn?t work. He was only a young man， forty at the outside， so he obviously hadn?t retired because of age.

Lizzie?s fishing for reasons brought no bites; we were left with speculation. The guesses were many: he?d won a lottery; he had been left money by wealthy parents; he was a retired crook; he was an invalid pensioner; he was simple. Lizzie favored the last; she