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1.
介绍了用逻辑分析仪对微处理器(CPU)时序进行测试与分析的基本方法和具体步骤。借此我们可深入了解指令在微机中的执行过程,解决CPU与存储器及I/O接口之间在时序上的配合问题,掌握硬件测试与维护的基本技能。  相似文献   

2.
在实际实验教学过程中,提出了一种基于指令与时序级的LSI功能测试与仿真模型的原理,根据仿真库模型实现对LSI的功能测试。主要包括外部模型、内部驱动模型、时序模型、功能模型等测试模型,测试结果通过静态功能、时序、波形等方法进行逻辑综合。系统可以实现电平测试、时序测试、指令测试等测试方法,达到对不同芯片的功能测试要求。  相似文献   

3.
提出了一种CPU设计方案,实现指令集为MIPS指令集中选取15条指令作为本CPU的基本指令,采用基本5步流水线CPU设计。分析了流水线CPU的逻辑结构与指令的处理过程,给出了取指阶段IF、译码阶段ID、执行阶段EX、内存访问阶段MEM、寄存器写回阶段WB阶段的设计与实现。对流水线产生的相关性问题,采用Bubble法和Forwarding法相结合的方法来消除相关性,在FPGA平台上进行了测试,测试结果表明,该方案符合设计要求。  相似文献   

4.
《微型计算机原理及应用》课已经讲授完毕、下面我们就有关课程重点、复习方法及考试注意事项提出几点建议和要求。一、课程重点学习本课程的目的是使同学们从应用的角度了解微型计算机的硬件和软件,学会用微型计算机解决一些简单的工程问题及编制一些应用程序。本课程讲授了计算机的基础知识,Z80的指令系统和汇编语言程序设计,280—CPU的结构和时序,半导体存贮器的分类、结构及与CPU的接口,外设与CPU的接口技术和接口片子,中断功能,A/D、D/A转换片子及与CPU的接口等,其中汇编语言程序设计和接口是这门课程的重点。  相似文献   

5.
介绍了一种利用Tomasulo算法处理数据相关的四级流水线CPU的设计,为计算机组成与系统结构硬件实验提供了实验教学样例。阐明了使用的实验环境和技术原理及CPU的设计结构和组成,给出使用的指令系统,同时对CPU进行了功能和性能两方面的测试。设计样例在课程的实验教学中具有很高的应用价值。  相似文献   

6.
为解决数据采集系统中高速传输需求,设计一种基于PCIE接口的高速数据传输系统。该系统采用PEX8111桥接芯片,实现了PCIE总线到PCI总线的协议转换。同时使用FPGA作为主控器对PEX8111芯片进行空间配置和PCI时序配置,分析了PCI总线突发读写传输过程,介绍了DMA数据传输方式,有效减小了传输过程中CPU资源占用率。经测试,传输速率可达138MB/s,完全满足高速数据数据传输的需求,并且性能稳定。  相似文献   

7.
提出了带Cache和精确中断响应的CPU设计方案,实现指令集MIPS中选取15条指令作为本CPU的基本指令.采用基本5步流水线CPU设计,给出了指令Cache、数据Cache和精确中断响应的设计与实现.测试结果表明,该方案符合设计要求.  相似文献   

8.
提出了一种基于USB的便携式数据采集与控制系统设计方案。从USB数据采集控制器硬件及电路设计、USB固件开发、驱动程庭设计以及数据采集程序设计等方面介绍了数据采集控制系统软硬件的设计和实现。该系统采用双CPU结构,一个CPU负责进行数据的采集、滤波、计算等,另一个CPU作为总线接口实现与PC机的通讯。以此为核心设计的数据采集控制系统。具有测试精度高、可靠性好,使用方便、通用性强等优点。可用于各种场合的实时数据采集与控制。  相似文献   

9.
介绍了基于FPGA(field programmable gate arry)的CPU MiniArm的指令系统、体系结构以及具体实现方法,讨论了将uC/OS-Ⅱ内核移植到MiniArm平台的关键技术,并详细描述了移植的具体实现过程,介绍了移植测试的方法并分析了测试结果,最后总结了移植操作系统到基于FPGA的CPU上的一般方法.  相似文献   

10.
为改变传统移频自动闭塞系统存在技术落后、信息量少、可靠性差,不能满足现代运输生产的发展需求状况,应用先进的单片机技术,可编程逻辑芯片(FPGA)和高性能CPU,通过逻辑结构设计和时序控制,实现了移频自动闭塞设备的集成化、通用化,大幅度提高了列车运行的可靠性,并为实现机车信号主体化创造了条件。  相似文献   

11.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

12.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

13.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.  相似文献   

14.
王菲 《华章》2007,(12):273-273
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.  相似文献   

15.
裴水妹 《华章》2007,(11):196
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.  相似文献   

16.
17.
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…  相似文献   

18.
钱生钱!     
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了  相似文献   

19.
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.  相似文献   

20.
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.  相似文献   

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