单片机的发展和应用外文翻译
原文
Title：DEVELOPMENT AND APPLICATION OF SINGLE CHIP
MICROCOMPUTER
Principle of MCU
Single-chip is an integrated on a single chip a complete computer system. Even though most of his features in a small chip, but it has a need to complete the majority of computer components: CPU memory internal and external bus system, most will have the core. At the same time such as integrated communication interfaces, timers, real-time clock and other peripheral equipments. And now the most powerful single-chip system can even voice, image, networking, input and output complex system integration on a single chip.
Microcontroller is only the CPU chip developed from dedicated processors. Is the earliest design concept through the integration of a large number of peripherals and CPU in a chip, make the computer system smaller, more easily integrated into a more intricate and strict in volume control equipments．
Single-chip microcomputer is different from the single machine, however, the chip before without development, it only has the strong function of very large scale integrated circuit, if giving it a particular program, it is a minimum, complete a microcomputer control system, it with the single machine or personal computer (PC) the distinction that having essence, MCU application belongs to the chip level, requires the user to understand the structure of the single-chip microcomputer and command system, and other integrated circuit application technology and system needs the theory and design technology, in this particular chip design application, so that the chip has the specific function.
Different MCU have different hardware and software characteristics, the technical features is that they are not the same, depends on the internal structure of single-chip microcomputer hardware features, users want to use a single chip microcomputer, must know whether the products meet the need of function and characteristic parameters required by the application system. The technical features include the features, control and electrical properties, etc., the information need to get from the manufacturer's technical manuals. Software refers to the instruction system characteristics and development support environment, instruction features which we are familiar with single-chip microcomputer
addressing mode, data processing and logical approach, input/output characteristics and the requirement of power supply and so on. Development support of environmental compatible includes instructions and portability, supporting software (including can support the development of application software resources) and hardware resources. To take advantage of a type microcontroller to develop their own application system, to master its structure features and technical characteristics is a must.
Single-chip microcomputer control system to replace previous use of complex electronic circuits or digital circuit of control system, can control software to realize, and can realize the intellectualized, now ubiquitous single-chip microcomputer control category, such as communication products, household appliances, smart instrumentation, process control and special control device and so on, single-chip computer is finding wider and wider application fields.
Hardware introduction：
The 8051 family of micro controllers is based on an architecture which is highly optimized for embedded control systems. It is used in a wide variety of applications from military equipment to automobiles to the keyboard on your PC. Second only to the Motorola 68HC11 in eight bit processors sales, the8051 family of microcontrollers is available in a wide array of variations from manufacturers such as Intel, Philips, and Siemens. These manufacturers have added numerous features and peripherals to the 8051 such as I2C interfaces, analog to digital converters watchdog timers, and pulse width modulated outputs. Variations of the 8051 with clock speeds up to 40MHz and voltage requirements down to 1.5volts are available. This wide range of parts based on one core makes the 8051family an excellent choice as the base architecture for a company's entire line of products since it can perform many functions and developers will only have to learn this one platform.
The basic architecture consists of the following features:
·an eight bit ALU
·32descrete I/O pins (4 groups of 8) which can be individually accessed
·two16 bit timer/counters
·full duplex UART
·6 interrupt sources with 2 priority levels
·128bytes of on board RAM
·separate 64K byte address spaces for DATA and CODE memory
One 8051 processor cycle consists of twelve oscillator periods. Each of the twelve oscillator periods is used for a special function by the 8051 core such as op code fetches and samples of the interrupt daisy chain for pending interrupts. The time required for any 8051 instruction can be computed by dividing the clock frequency by 12, inverting that result and multiplying it by the number of processor cycles required by the instruction in question. Therefore, if you have a system which is using an11.059MHz clock, you can compute the number of instructions per second by dividing this value by 12. This gives an instruction frequency of 921583instructions per second. Inverting this will provide the amount of time taken by each instruction cycle (1.085 microseconds).
MCU applications
SCM now permeate all areas of our lives which is almost difficult to find traces of the field without SCM. Missile navigation equipment, aircraft, all types of instrument control, computer network communications and data transmission, industrial automation, real-time process control and data processing, extensive use of various smart IC card, civilian luxury car security system, video recorder, camera, fully automatic washing machine control, and program-controlled toys, electronic pet, etc., which are inseparable from the microcontroller. Not to mention the area of robot control, intelligent instruments medical equipment was. Therefore, the MCU learning, development and application of the large number of computer applications and intelligent control of the scientists and engineers．
SCM is widely used in instruments and meters, household appliances, medical equipment, aerospace, specialized equipment, intelligent management and process control fields, roughly divided into the following several areas:
1.In the application of Intelligent Instruments
SCM has a small size, low power consumption, controlling function, expansion flexibility, the advantages of miniaturization and ease of use, widely used instrument, combining different types of sensors can be realized voltage, power, frequency, humidity, temperature, flow, speed, thickness, angle, length, hardness, elemental, physical pressure measurement. SCM makes use of digital instruments, intelligence, miniaturization, and functionality than electronic or digital circuits more powerful. Such as precision measuring equipment (power meter oscilloscope various analytical instrument).
2.In the industrial control application
With the MCU can constitute a variety of control systems, data acquisition system Such as factory assembly line of intelligent control.
3.In Household Appliances
Can be said that the appliance are basically using SCM, praise from the electric rice, washing machines, refrigerators, air conditioners, color TV, and other audio video equipment, to the electronic weighing equipment, varied, and omnipresent.
4.In the field of computer networks and communications applications
MCU general with modern communication interface, can be easy with the computer data communication, networking and communications in computer applications between devices had excellent material conditions, are basically all communication equipment to achieve a controlled by MCU from mobile phone, telephone, mini-program-controlled switchboards, building automated communications call system, train radio communication, to the daily work can be seen everywhere in the mobile phones trunk mobile radio, walkie-talkies, etc.
译文
题目：单片机的发展和应用
单片机原理
单片机是指将一个完整的计算机系统集成在一块芯片上。尽管他的大部分功能集成在一块小芯片上，但是它具有一个完整计算机所需要的大部分部件：CPU、内存、内部和外部总线系统，目前大部分还会具有外存。同时集成诸如通讯接口、定时器，实时时钟等外围设备。而现在最强大的单片机系统甚至可以将声音、图像、网络、复杂的输入输出系统集成在一块芯片上。
单片机由芯片内仅有CPU的专用处理器发展而来。最早的设计理念是通过将大量外围设备和CPU集成在一个芯片中，使计算机系统更小，更容易集成更复杂的而对体积要求严格的控制设备当中。
然而单片机又不同于单板机，芯片在没有开发前，它只是具备功能极强的超大规模集成电路，如果赋予它特定的程序，它便是一个最小的、完整的微型计算机控制系统，它与单板机或个人电脑(PC机)有着本质的区别，单片机的应用属于芯片级应用，需要用户了解单片机芯片的结构和指令系统以及其它集成电路应用技术和系统设计所需要的理论和技术，用这样特定的芯片设计应用程序，从而使该芯片具备特定的功能。
不同的单片机有着不同的硬件特征和软件特征，即它们的技术特征不尽相同，硬件特征取决于单片机芯片的内部结构，用户要想使用某种单片机，必须了解该型产品是否满足需要的功能和应用系统所要求的特性指标。这里的技术特征包括功能特性、控制特性和电气特性等等，这些信息需要从生产厂商的技术手册中得到。软件特征是指指令系统特性和开发支持环境，指令特性即我们熟悉的单片机的寻址方式，数据处理和逻辑处理方式，输入输出特性及对电源的要求等等。支持开发的环境包括指令的兼容及可移植性，支持软件(包含可支持开发应用程序的软件资源)及硬件资源。要利用某型号单片机开发自己的应用系统，掌握其结构特征和技术特征是必须的。
单片机控制系统能够取代以前利用复杂电子线路或数字电路构成的控制系统，可以通过软件控制来实现，并能够实现智能化，现在单片机控制范畴无所不在，例如通信产品、家用电器、智能仪器仪表、过程控制和专用控制装置等等，单片机的应用领域越来越广泛。
单片机硬件介绍：
8051系列微控制器是建立在一个高度优化的嵌入式控制系统的结构上。它的运用范
围比较广，从军事装备到汽车再到你的PC机的键盘。仅次于摩托罗拉8位处理器68HC11的销售，家庭中的8051微控制器，在制造商上有各种各样的变化，如因特尔公司、西门子、飞利浦。这些厂家已经增加了许多功能及外设，如总线接口，模拟到数字转换器，看门狗定时器、脉冲宽度调制的输出。8051与时钟变化速度高达40MHz的电压需求降低到1.5volts可供选择。这种大范围基于一个核心部件，使8051系列是一个很好的选择，作为一个产品公司的整个产品线，因为它可以执行许多功能和开发的基础架构将只需要学习这一个平台。
基本结构有以下特点：
一个8位的算术逻辑单元
32个离散输入输出端口（4组8位）可单独访问
两个16位定时器/计数器
全双工通用异步接收/发送装置
6个中断源与2个优先级别
128字节的随机存储器
64K分开字节地址空间的数据和代码的记忆
一个8051处理器周期共有十二个振荡周期。它的核心是在每一个阶段用于特殊功能的振荡器，例如数字代码和全部中断中的处理器。8051指令所需通过的时间可以由任何时钟频率除以12，并通过它的数字处理器所指示的反馈结果和增殖周期显示。因此，如果你有一个使用11.059MHz时钟的系统，这个值除以12可以计算出指令数。这给出了921583指令每秒指令频率。采取的反相时间将提供每个指令周期（1.085微秒）。
单片机的应用
现在单片机渗透到我们生活的各个领域，几乎很难找到没有单片机的痕迹。导弹导航设备、飞机、所有类型的仪器控制、计算机网络通信和数据传输，工业自动化，实时过程控制和数据处理，广泛使用的各种智能IC卡、民用豪华轿车的安全系统、录像机、摄像机、全自动洗衣机的控制，以及程控玩具、电子宠物等等，这些都离不开单片机。更不用说机器人控制领域，智能仪器，医疗设备。因此，大量的科学家、工程师需要学习单片机的开发与应用以及计算机应用和智能控制。
单片机广泛应用于仪器仪表、家用电器、医疗器械、航空航天、专用设备、智能管理和过程控制领域，大致分为以下几个方面：
1、在应用程序的智能仪器
单片机具有体积小、功耗低、控制功能，扩张的灵活性，小型化和易用性的优势，
是广泛使用的工具，结合不同类型的传感器可以实现电压、功率、频率、湿度、温度、流量、速度、厚度、角度、长度、硬度、元素、物理压力测量。单片机利用数字仪器、情报、小型化、功能比电子或数字电路更加强大。例如精密的测量设备(功率计，示波器，各种分析仪)。
2、在工业控制应用程序
单片机可以构成各种控制系统、数据采集系统。如工厂生产线的智能控制。
3、在家用电器
可以说，该设备基本上都是采用单片机，从电饭煲，洗衣机，冰箱，空调，彩电，以及其他音频视频设备的好评，在电子称重设备，五花八门，无所不在。
4、在计算机网络和通信领域的应用
单片机一般有现代化的通讯接口，可以方便的与电脑进行数据通信，网络和设备之间的计算机通信程序具有良好的物质条件，基本上所有通讯设备，都实现了由单片机手机控制，例如电话、迷你程序、程控交换机、楼宇自动通信呼叫系统、列车无线通信、日常工作中随处可见的手机躯干移动无线电、对讲机等。
步进电机及单片机英文文献及翻译
外文文献： Knowledge of the stepper motor What is a stepper motor： Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the number of pulses to control the angular displacement, so as to achieve accurate positioning purposes; the same time you can control the pulse frequency to control the motor rotation speed and acceleration, to achieve speed control purposes. What kinds of stepper motor sub-： In three stepper motors: permanent magnet (PM), reactive (VR) and hybrid (HB) permanent magnet stepper usually two-phase, torque, and smaller, step angle of 7.5 degrees or the general 15 degrees; reaction step is generally three-phase, can achieve high torque output, step angle of 1.5 degrees is generally, but the noise and vibration are large. 80 countries in Europe and America have been eliminated; hybrid stepper is a mix of permanent magnet and reactive advantages. It consists of two phases and the five-phase: two-phase step angle of 1.8 degrees while the general five-phase step angle of 0.72 degrees generally. The most widely used Stepper Motor. What is to keep the torque (HOLDING TORQUE) How much precision stepper motor? Whether the cumulative： The general accuracy of the stepper motor step angle of 3-5%, and not cumulative.
会计内部控制中英文对照外文翻译文献
会计内部控制中英文对照外文翻译文献(文档含英文原文和中文翻译)
内部控制透视：理论与概念 摘要：内部控制是会计程序或控制系统，旨在促进效率或保证一个执行政策或保护资产或避免欺诈和错误。内部是一个组织管理的重要组成部分。它包括计划、方法和程序使用，以满足任务，目标和目的，并在这样做，支持基于业绩的管理。内部控制是管理阶层的平等与控制可以帮助管理者实现资源的预期的有效管理的结果通过。内部控制应减少或违规错误的风险关联未被发现的，但设计和建立有效的内部控制不是一个简单的任务，不可能是一个实现通过快速修复短套。在此讨论了内部文件的概念的不同方面的内部控制和管制。 关键词：内部控制，管理控制，控制环境，控制活动，监督 1、介绍 环境需要新的业务控制变量不为任何潜在的股东和管理人士的响应因子为1，另外应执行/她组织了一个很大的控制权。控制是管理活动的东西或以上施加控制。思想的产生和近十年的发展需要有系统的商业资源和控制这种财富一个新的关注。主题之一热一回合管制的商业资源是分析每个控制成本效益。 作为内部控制和欺诈的第一道防线，维护资产以及预防和侦查错误。内部控制，我们可以说是一种控制整个系统的财务和其他方面的管理制定了为企业的顺利运行;它包括内部的脸颊，内部审计和其他形式的控制。 COSO的内部控制描述如下。内部控制是一个客观的方法用来帮助确保实现。在会计和组织理论，内部控制是指或目标目标的过程实施由组织的结构，工作和权力流动，人员和具体的管理信息系统，旨在帮助组织实现。这是一种手段，其中一个组织的资源被定向，监控和测量。它发挥着无形的（重要的作用，预防和侦查欺诈和保护组织的资源，包括生理（如，机械和财产）和乙二醇，声誉或知识产权，如商标）。在组织水平，内部控制目标与可靠性的目标或战略的财务报告，及时反馈业务上的成就，并遵守法律，法规。在具体的交易水平，内部控制是指第三方采取行动以实现一个具体目标（例如，如何确保本组织的款项，在申请服务提供有效的。）内部控制程序reduce程变异，导
单片机外文翻译
杭州电子科技大学信息工程学院毕业设计（论文）外文文献翻译 毕业设计（论文）题目用单片机实现的数字时钟电路设计文献综述题目单片机控制系统系电子工程 专业电子信息科学与技术 姓名郭筱楠 班级08091911 学号08919115 指导教师王维平
单片机控制系统 广义地说，微型计算机控制系统（单片机控制系统）是用于处理信息的，这种被用于处理的信息可以是电话交谈，也可以是仪器的读数或者是一个企业的帐户，但是各种情况下都涉及到相同的主要操作：信息的处理、信息的存储和信息的传递。在常规的电子设计中，这些操作都是以功能平台方式组合起来的，例如计数器，无论是电子计数器还是机械计数器，都要存储当前的数值，并且按要求将该数值增加1。一个系统例如采用计数器的电子钟之类的任一系统要使其存储和处理能力遍布整个系统，因为每个计数器都能存储和处理一些数字。 现如今，以微处理器为基础的系统从常规的处理方法中分离了出来，它将信息的处理，信息的存储和信息的传输三个功能分离形成不同的系统单元。这种主要将系统分成三个主要单元的分离方法是冯-诺依曼在20世纪40年代所设想出来的，并且是针对微计算机的设想。从此以后基本上所有制成的计算机都是用这种结构设计的，尽管他们包含着宽广的物理形式与物理结构，但从根本上来说他们均是具有相同基本设计的计算机。 在以微处理器为基础的系统中，处理是由以微处理器为基础的系统自身完成的。存储是利用存储器电路，而从系统中输入和输出的信息传输则是利用特定的输入/输出（I/O）电路。要在一个以微处理器为基础的时钟中找出执行具有计数功能的一个特殊的硬件组成部分是不可能的，因为时间存储在存储器中，而在固定的时间间隔下由微处理器控制增值。但是，规定系统运转过程的软件却规定了包含实现计数器计数功能的单元部分。由于系统几乎完全由软件所定义，所以对微处理器结构和其辅助电路这种看起来非常抽象的处理方法使其在应用时非常灵活。这种设计过程主要是软件工程，而且在生产软件时，就会遇到产生于常规工程中相似的构造和维护问题。 图1.1 微型计算机的三个组成部分 图1.1显示出了微型计算机中这三个单元在一个微处理器控制系统中是如何按照机器中的信息通信方式而联接起来的。该系统由微处理器控制，微处理器能够对其自身的存储器和输入/输出单元的信息传输进行管理。外部的连接部分与
外文翻译--如何监测内部控制
附录A
附录B 如何监测内部控制 内部控制是任何组织有效运行的关键,董事会、执行长和内部审计人员都为实现这个企业的目标而工作;该内部控制系统是使这些团体确保那些目标的达成的一种手段。控制帮助一个企业有效率地运转。此外,运用一种有效的风险系统,风险可被降低到最小。同时,控制促进经营和与经营有关的信息的可靠性。全美反舞弊性财务报告委员会发起组织(COSO；1992) 在它发布的具有开创性的文件《内部控制整合框架》中,将内部控制定义为：企业风险管理是一个过程，受企业董事会、管理层和其他员工的影响，包括内部控制及其在战略和整个公司的应用，旨在为实现经营的效率和效果、财务报告的可靠性以及法规的遵循提供合理保证。该委员会还指出,一个的内部控制的系统包括五个要素。它们是：控制环境、风险评估、信息和沟通、控制活动、监控。 COSO的定义及五个要素已被证明确实对不同的团体,如董事会和首席执行官起到作用。这些群体对内部控制系统的监管以及系统设计与运行有责任。而且,内部审计人员已经发现COSO的指导是有用的。这群人员可能会被董事会或管理层要求去测试控制。COSO最近发布的一份讨论文件，指出五个要素监控,其中的五个要素的确定在1992 frame work COSO原本。中国发展简报的题为《内部控制-整合框架：内部控制体系监督指南》(COSO，2007)。在文件中,COSO 强调监控的重要性，以及这些信息常常被没有充分利用。 因为董事会、执行长,和内部审计人员都在一个公司的内部控制中扮演着重要角色，内部控制的各要素,包括监测,都对所有的团体有着非常重要的意义。同时,外审计人员对监测有兴趣。《萨班斯-奥克斯利法案》（2002）为外部审计师创建了一个新的监督体制。所有的五个要素,包括监测,必须加以考虑。另外,内部控制审计必须结合对财务报告的检查。在一体化审计之前，在首席执行官的领导下，也许也在内部审计活动的支持下的管理，评估了内控制体系的有效性。随后外部审计人员对控制出具意见。起监督角色的董事会，将阅读内部审计、管理层和首席执行官出具的报告。文件关于监测对每一个团体的指导起了帮助,因为他们分别为各自的角色而劳动。 第一，什么是监测。监测的组成可评估内部控制系统在过去一段时间发挥效用的质量。其对控制功能的评估有助于企业确定其控制在有效地运作中。在执行监测活动时，相关人员参与审查系统的设计及其运行效果。这种检查必须进行及时,目的是为了提供给企业最大的利益。管理层负责做出适当的行动以回应这些结果。当事人对内部控制有兴趣,可以充分依赖这个内部控制系统,如果合适的监
单片机外文文献翻译
外文文献一单片机简介 单片机是一种集成在电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计时器等功能（可能还包括显示驱动电路、脉宽调制电路、模拟多路转换器、A/D转换器等电路）集成到一块硅片上构成的一个小而完善的计算机系统。单片机也被称为微控制器（Microcontroller），是因为它最早被用在工业控制领域。单片机由芯片内仅有CPU的专用处理器发展而来。最早的设计理念是通过将大量外围设备和CPU集成在一个芯片中，使计算机系统更小，更容易集成进复杂的而对体积要求严格的控制设备当中。INTEL的Z80是最早按照这种思想设计出的处理器，从此以后，单片机和专用处理器的发展便分道扬镳。 二、单片机的发展趋势 现在可以说单片机是百花齐放，百家争鸣的时期，世界上各大芯片制造公司都推出了自己的单片机，从8位、16位到32位，数不胜数，应有尽有，有与主流C51系列兼容的，也有不兼容的，但它们各具特色，互成互补，为单片机的应用提供广阔的天地。 纵观单片机的发展过程，可以预示单片机的发展趋势，大致有： 1.低功耗CMOS MCS-51系列的8031推出时的功耗达630mW，而现在的单片机普遍都在100mW左右，随着对单片机功耗要求越来越低，现在的各个单片机制造商基本都采用了CMOS(互补金属氧化物半导体工艺)。象80C51就采用了HMOS(即高密度金属氧化物半导体工艺)和CHMOS(互补高密度金属氧化物半导体工艺)。CMOS虽然功耗较低，但由于其物理特征决定其工作速度不够高，而CHMOS则具备了高速和低功耗的特点，这些特征，更适合于在要求低功耗象电池供电的应用场合。所以这种工艺将是今后一段时期单片机发展的主要途径。 2.微型单片化 现在常规的单片机普遍都是将中央处理器(CPU)、随机存取数据存储(RAM)、只读程序存储器(ROM)、并行和串行通信接口，中断系统、定时电路、时钟电路集成在一块单一的芯片上，增强型的单片机集成了如A/D转换器、PMW(脉宽调制电路)、WDT(看门狗)、有些单片机将LCD(液晶)驱动电路都集成在单一的芯片上，这样 单片机包含的单元电路就更多，功能就越强大。甚至单片机厂商还可以根据用户的要求量身定做，制造出具有． 自己特色的单片机芯片。此外，现在的产品普遍要求体积小、重量轻，这就要求单片机除了功能强和功耗低外，还要求其体积要小。现在的许多单片机都具有多种封装形式，其中SMD(表面封装)越来越受欢迎，使得由单片机构成的系统正朝微型化方向发展。 3.主流与多品种共存 现在虽然单片机的品种繁多，各具特色，但仍以80C51为核心的单片机占主流，兼容其结构和指令系统的有PHILIPS公司的产品，ATMEL公司的产品和中国台湾
中小企业内部控制_外文参考文献
中小企业内部控制_外文参考文献 安徽工业大学毕业设计外文翻译 Private Enterprises of the intenal control issues Pulin Chang Economic Review. 2008, (5) Third, the promotion of private SMEs in the internal control system strategy (A) change management and business owners the concept of development. The majority of private small and medium enterprises in the family business, the success of these enterprises depends largely on internal control or entrepreneur leadership attention and level of implementation. Over the years, by traditional Chinese culture, business owners believe in Sincerity, fraternal loyalty permeate many aspects of enterprise management, strengthen internal controls that will affect the organization the members of distrust, resulting in internal control. Many private business owners that rely on business to do business benefits out of, rather than out of the internal financial management control; that the market is the most important internal control will be bound himself and staff development. Understanding of the bias, so that these leaders neglected the internal control system on the production and operation activities. Internal control can really become the leader of the internal needs of enterprise internal control system is the key to whether a mere formality. The internal control to make the internal needs of the enterprise depends largely on two points: First, determine
单片机外文翻译--STC89C52处理芯片
外文资料翻译 STC89C52 processi ng chip Prime features: With MCS - 51 SCM product compatibility, 8K bytes in the system programmable Flash memory, 1000 times CaXie cycle, the static operation: 0Hz ~ 33Hz, triple encryption program memory, 32 programmed I/O port, three 16 timer/counter, the eight uninterrupted dual-career UART serial passage, low power consumption, leisure and fall after fall electric power mode can be awakened and continuous watchdog timer and double-number poin ter, power ide ntifier. Efficacy: characteristics STC89C52 is one kind of low power consumption, high CMOS8 bit micro-co ntroller, 8K in system programmable Flash memory. Use high-de nsity nonv olatile storage tech no logy, and in dustrial 80C51 product in structi on and pin fully compatible. The Flash memory chips allows programs in the system, also suitable for programmable conventional programming. In a single chip, have clever 8 bits CPU and on li ne system programmable Flash, in crease STC89C52 for many embedded control system to provide high vigorous application and useful solutions. STC89C52 has following standard efficacy: 8k byte Flash RAM, 256 bytes, 32 I/O port, the watchdog timer, two, three pointer numerical 16 timer/counter, a 6 vector level 2 continuous structure, the serial port, working within crystals and horological circuit. In addition, 0Hz AT89S52 can drop to the static logic operation, support two software can choose power saving mode. Idle mode, the CPU to stop working, and allows the RAM, timer/c oun ters, serial, continu ous to work. Protectio n asa na patter n, RAM content is survival, vibrators frozen, SCM, until all the work under a continuous or hardware reset. 8-bit microcontrollers 8K bytes in the system programmable Flash AT89S52 devices. Mouth: P0 P0 mouth is a two-way ope n drain I/O. As export, each can drive eight TTL logic level. For P0 port to write "1", foot as the high impeda nee in put. When access to exter nal programs and nu merical memory, also known as
单片机的外文文献及中文翻译
SCM is an integrated circuit chip, is the use of large scale integrated circuit technology to a data processing capability of CPU CPU random access memory RAM, read-only memory ROM, a variety of I / O port and interrupt system, timers / timer functions (which may also include display driver circuitry, pulse width modulation circuit, analog multiplexer, A / D converter circuit) integrated into a silicon constitute a small and complete computer systems. SCM is also known as micro-controller (Microcontroller), because it is the first to be used in industrial control. Only a single chip by the CPU chip developed from a dedicated processor. The first design is by a large number of peripherals and CPU on a chip in the computer system, smaller, more easily integrated into a complex and demanding on the volume control device which. The Z80 INTEL is the first designed in accordance with this idea processor, then on the development of microcontroller and dedicated processors will be parting ways. Are 8-bit microcontroller early or 4 bits. One of the most successful is the INTEL 8031, for a simple, reliable and good performance was a lot of praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16-bit microcontroller, but not ideal because the cost has not been very widely used. After 90 years with the great development of consumer electronics, microcontroller technology has been a huge increase. With INTEL i960 series, especially the later series of widely used ARM, 32-bit microcontroller quickly replace high-end 16-bit MCU status and enter the mainstream market. The traditional 8-bit microcontroller performance have been the rapid increase capacity increase compared to 80 the number of times. Currently, high-end 32-bit microcontroller clocked over 300MHz, the performance catching the mid-90s dedicated processor, while the average model prices fall to one U.S. dollar, the most high-end [1] model only 10 dollars. Modern SCM systems are no longer only in the development and use of bare metal environment, a large number of proprietary embedded operating system is widely used in the full range of SCM. The handheld computers and cell phones as the core processing of high-end microcontroller can even use a dedicated Windows and Linux operating systems. SCM is more suitable than the specific processor used in embedded systems, so it was up to the application. In fact the number of SCM is the world's largest computer. Modern human life used in almost every piece of electronic and mechanical products will be integrated single chip. Phone, telephone, calculator, home appliances, electronic toys, handheld computers and computer accessories such as a mouse with a 1-2 in both the Department of SCM. Personal computer will have a large number of SCM in the work. General car with more than 40 microcontroller, a complex industrial control systems may even hundreds of single chip at the same time work! SCM is not only far exceeds the number of PC and other computing the sum, or even more than the number of human beings. Single chip, also known as single-chip microcontroller, it is not complete a certain logic chips, but to a computer system integrated into a chip. Equivalent to a
单片机外文文献翻译资料
沈阳工程学院毕业设计（论文） 外文文献 一单片机简介 单片机是一种集成在电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计时器等功能（可能还包括显示驱动电路、脉宽调制电路、模拟多路转换器、A/D转换器等电路）集成到一块硅片上构成的一个小而完善的计算机系统。 单片机也被称为微控制器（Microcontroller），是因为它最早被用在工业控制领域。单片机由芯片内仅有CPU的专用处理器发展而来。最早的设计理念是通过将大量外围设备和CPU集成在一个芯片中，使计算机系统更小，更容易集成进复杂的而对体积要求严格的控制设备当中。INTEL的Z80是最早按照这种思想设计出的处理器，从此以后，单片机和专用处理器的发展便分道扬镳。 二、单片机的发展趋势 现在可以说单片机是百花齐放，百家争鸣的时期，世界上各大芯片制造公司都推出了自己的单片机，从8位、16位到32位，数不胜数，应有尽有，有与主流C51系列兼容的，也有不兼容的，但它们各具特色，互成互补，为单片机的应用提供广阔的天地。 纵观单片机的发展过程，可以预示单片机的发展趋势，大致有： 1.低功耗CMOS MCS-51系列的8031推出时的功耗达630mW，而现在的单片机普遍都在100mW左右，随着对单片机功耗要求越来越低，现在的各个单片机制造商基本都采用了CMOS(互补金属氧化物半导体工艺)。象80C51就采用了HMOS(即高密度金属氧化物半导体工艺)和CHMOS(互补高密度金属氧化物半导体工艺)。CMOS虽然功耗较低，但由于其物理特征决定其工作速度不够高，而CHMOS则具备了高速和低功耗的特点，这些特征，更适合于在要求低功耗象电池供电的应用场合。所以这种工艺将是今后一段时期单片机发展的主要途径。 2.微型单片化 现在常规的单片机普遍都是将中央处理器(CPU)、随机存取数据存储(RAM)、只读程序存储器(ROM)、并行和串行通信接口，中断系统、定时电路、时钟电路集成在一块单一的芯片上，增强型的单片机集成了如A/D转换器、PMW(脉宽调制电路)、WDT(看门狗)、有些单片机将LCD(液晶)驱动电路都集成在单一的芯片上，这样单片机包含的单元电路就更多，功能就越强大。甚至单片机厂商还可以根据用户的要求量身定做，制造出具有自己特色的单片机芯片。此外，现在的产品普遍要求体积小、重量轻，这就要求单片机除了功能强和功耗低外，还要求其体积要小。现在的许多单片机都具有多种封装形式，其中SMD(表面封装)越来越受欢迎，使得由单片机构成的系统正朝微型化方向发
外文翻译--中小型民营企业内部控制研究
中文5900字 本科毕业设计（论文） 外文参考文献译文及原文 学院 专业 年级班别 学号 学生姓名 指导教师 年月日
中小民营企业内部控制研究 Research on the Internal Control of Small and Medium-sized Private Enterprises 目录 摘要 (1) 1 选题背景 (2) 2内部控制理论的概述 (3) 2.1 内部控制的根本性质 (3) 2.2内部控制的责任 (3) 3 确保内部控制的充分性 (5) 4 先天的内部控制 (9) 5 结论 (11) Abstract (12) 1Background Topics (13) 2 Internal control theory outlined (15) 2.1 The Fundamental Nature Of Intaral Control (15) 2.2 Responsibillty For Internal Control (15) 3 Ensuring that the internal control adequacy (17) 4 Inherent limitations of internal control (22) 5 Conclusion (25)
摘要 内部控制这个概念已经不是一个新概念。这篇文章将研究每个公共部门财政经理和董事会成员应该了解的关于内部控制的内容。在分析了虚假的财政报告的根本原因以后，Treadway 委员会把大部分的责任归咎于内部控制管理的不足。作为回应，建立Treadway委员会的各个组织成立了一个赞助组织委员会（COSO），设法补救的Treadway委员会揭露出来的问题。 COSO为了确保此架构足够及全面的内部控制，确定了5个重要组成部分：1、控制环境；2、风险评估；3、政策及程序；4、沟通；5、监测与追踪。一个健全的架构与内部控制是必要的，同时必须意识到这类框架是难于达到一个完美的境界。内部控制在本质上是一种管理责任。
单片机_英文参考文献
Structure and function of the MCS-51 series The MCS-51 series one-chip computer MCS-51 is a name of a piece of one-chip computer series which Intel Company produces. This company introduced 8 top-grade one-chip computers of MCS-51 series in 1980 after introducing 8 one-chip computers of MCS-48 series in 1976. It belong to a lot of kinds this line of one-chip computer the chips have,such as 8051, 8031, 8751, 80C51BH, 80C31BH,etc., their basic composition, basic performance and instruction system are all the same. 8051 daily representatives- 51 serial one-chip computers . 51系列单片机是由英特尔公司生产的的单片机产品。该家公司在1976年发行了8位MCS-48系列。然后又在在1980年推出了高8位的MCS-51系列单片机。它属于这一类型很多行一个芯片的电脑芯片都如8051、8031、8751、 80c51bh,80c31bh等,其基本组成、性能和基本教学制度,都是一样的. 8051通常是51系列的代表。 An one-chip computer system is made up of several following parts: ( 1) One microprocessor of 8 (CPU). ( 2) At slice data memory RAM (128B/256B),it use not depositting not can reading /data that write, such as result not middle of operation, final result and data wanted to show, etc. ( 3) Procedure memory ROM/EPROM (4KB/8KB ), is used to preserve the procedure , some initial data and form in slice. But does not take ROM/EPROM within some one-chip computers, such as 8031 , 8032, 80C ,etc.. ( 4) Four 8 run side by side I/O interface P0 four P3, each mouth can use as introduction , may use as exporting too. ( 5) Two timer / counter, each timer / counter may set up and count in the way, used to count to the external incident, can set up into a timing way too, and can according to count or result of timing realize the control of the computer. ( 6) Five cut off cutting off the control system of the source . ( 7) One all duplexing serial I/O mouth of UART (universal asynchronous
外文翻译--企业内部控制的决定因素和后果
附件1：外文资料翻译译文 企业内部控制的决定因素和后果： 一个权变理论为基础的分析 1简介 人们普遍认为，内部控制制度能帮助企业降低风险、保证财务报表的可靠性和加强对法律法规的遵守。因此，一些企业的倒闭现象和一些欺诈行为的广泛宣传逐渐增加，针对企业特定的经营环境，从而使企业对内部控制制度更加重视。有效地管理对加强企业内部控制的有效性，并有效地传达给董事会和股东具有更大的压力。例如审计人员、供应商、顾客跟内部控制也有关系，因为它们可能影响长期财务报告的可信度、管理人员的责任和企业的组织形式。 尽管内部控制是影响公司的一个重要因素，证据表明，内部控制结构的实际表现在组织结构中是不存在的。正如金尼所提到的那样，该议题还未被研究人员所开发。关于内部控制的专业文献对于发展国际管制框架已经取得了一定的进展，但迄今为止，内部控制研究的数量是有限的。Selto和Windener出版的研究和分析的专业文章，发现在管理控制的研究中，关于内部控制专题的文学比实际文学少。人们越来越重视内部控制业务发挥的作用，缺乏现有的研究，所以建立新的研究需要和机会是当务之急。 这项研究有助于了解内部控制结构及其在公司环境中的成效。即使内部控制框架提出了内部控制的一个标准化的结构和目标，他们认为根据公司的特点来判断内部控制的不同需要。然而无论是框架还是先前的文学都不能提供一个适合于企业特点及其控制系统关系的图片。因此，本研究利用一个应急的方法来审查内部控制结构的设计及其在不同环境下观察到的成效。研究报告分析了结构方程关系模型和芬兰提出的741公司的实证结果。这项研究结果使内部控制几个重要方面的研究知识增加了局限性。首先，研究提出利用实证研究结果对内部控制及其在实践中的有效性进行研究。世界各地有一些组织把内部控制框架作为基金会开展活动。无论如何，还有一些关于实践框架以外的证据，从而对模式有一个更深
单片机外文翻译
单片机外文翻译 MICROCONTROLLER 1.MCU A microcontroller (or MCU) is a computer-on-a-chip. It is a type of microprocessor emphasizing self-sufficiency and cost-effectiveness, in contrast to a general-purpose microprocessor (the kind used in a PC). The majority of computer systems in use today are embedded in other machinery, such as telephones, clocks, appliances, vehicles, and infrastructure. An embedded system usually has minimal requirements for memory and program length and may require simple but unusual input/output systems. For example, most embedded systems lack keyboards, screens, disks, printers, or other recognizable I/O devices of a personal computer. They may control electric motors, relays or voltages, and read switches, variable resistors or other electronic devices. Often, the only I/O device readable by a human is a single light-emitting diode, and severe cost or power constraints can even eliminate that. In contrast to general-purpose CPUs, microcontrollers do not have an address bus or a data bus, because they integrate all the RAM and non-volatile memory on the same chip as the CPU. Because they need fewer pins, the chip can be placed in a much smaller, cheaper package. Integrating the memory and other peripherals on a single chip and testing them as a unit increases the cost of that chip, but often results in decreased net cost of the embedded system as a whole. (Even