08-2 8.2 Characteristics of Embedded Systems.pptx

第1页：8.2 生词表

第2页：8.2 缩略语表

第3页：嵌入式系统的主要特点嵌入式系统的主要特点

The key characteristic of an embedded system is that it is supposed to handle a few simple tasks,although the steps involved in handling or accomplishing that task maybe as complex as any computer program. Avideogame controller,forexample,maybe said to have simple tasks-load the game and allow the player to control it through commands entered through the handset.嵌入式系统的主要特点嵌入式系统的主要特点是用来处理一些简单的任务，虽然参与处理或完成这项任务的步骤可能会和其他计算机程序同样复杂。例如，游戏控制器，可以说有简单的任务-加载游戏并且让玩家通过手持装置输入命令来控制游戏。

第4页：英语中，由于修辞或

Intruth,however,agamecontroller(especially the newer games built for the X-boxor PS 3)goes through a series of steps and actions that require as much processing power as a standalone computer.[1]Among the characteristics of modern embedded systems are:UserInterfaces,Simple Systems which Stemfrom Limited Functionality and CPUPlatforms with Microprocessors or Microcontrollers.分析：倒装句。英语中，由于修辞或是平衡句子的原因也可以用倒装句。如：Next to this one is another grand hotel which is beautifully decorated.这家饭店隔壁还有一家装修华丽的大饭店。然而，实际上游戏控制器（特别为X-箱或PS3制造的新游戏）的工作是通过了一系列的步骤和操作实现的；执行这些步骤和操作需要与独立的计算机同样大的处理能力。现代嵌入式系统的主要特点有：用户界面、基于有限功能的简单系统、和带有微处理器或微控制器的CPU平台。

第5页：用户界面最初

User Interfaces Originally,an embedded system had no user interface-information and programs were already incorporated into the system(e.g.,the guidance system for an Intercontinental Ballistic Missileor ICBM)and there was no need for human interaction or intervention except to install the device and test it.用户界面最初，一个嵌入式系统没有用户界面-信息和程序已经纳入系统（例如，洲际弹道导弹或ICBM制导系统）。除非安装和测试装置，没有人类干预或人机交互的必要。

第6页：但是，许多现代的嵌入式系统有与其他计算机

但是，许多现代的嵌入式系统有与其他计算机相同的用户接口，虽然这些只是用来进行数据输入，不会为系统提供额外功能。例如：PDA(个人数字助理)的QWERTY键盘用来输入姓名、地址、电话号码和备忘录、甚至完整的文件。目前PDA实现全部台式电脑的功能，但是它们可能不再被视为嵌入式系统。Many modern embedded systems however,have full-scale user interfaces although these are only inputs for data but are not supposed to provide additional functionality for the system,e. g. QWERTYkey boards for PDAsusedto enter names,addresses,phone numbers and notes and even full sized documents. The moment PDAsachieve full desktop computer functionalities,however,they may no longer be considered embedded systems.

第7页：8.2 嵌入式系统特点 课文要点

Simple Systems which Stem from Limited Functionality Originally,this referred to basic systems such as switches,small character-or digit-only displays and LEDsintended to show the ' health'of the embedded system,but this has also achieved some level of complexity.[2]Acash register or an ATMwith touchscreen technology is considered an embedded system since it has limited uses,even if the user interface(thetouchscreen)is a complex system.分析：consider作“认为”解时，后面的anembeddedsystem是主语Acash register or an ATMwith touchscreen technology的补语。基于有限功能的简单系统最初，嵌入式系统指基本系统，如交换机、小的字符或数字显示器和用于显示嵌入式系统的“健康”的发光二极管，但是这也变得复杂了。使用触摸屏技术的收银机或自动柜员机被认为是嵌入式系统，因为它限定了用途，即使用户界面（触摸屏）是一个复杂的系统。

第8页：带有微处理器或微控制器的CPU平台再者

带有微处理器或微控制器的CPU平台再者，特定的功能是判定嵌入式系统的关键。从某种意义上说，BIOS芯片被认为是嵌入式系统，因为它有特定的功能并自动运行（当计算机启动时）。同样，外围设备如USB接口也可以被看作是嵌入式系统。CPUPlatforms with Microprocessors or Microcontrollers Again,limited functionality is the key in defining these as embedded systems. Inasense,the BIOSchipis considered an embedded system since it has limited functions,and works automatically(when the computer is booted up).Peripherals like the USBcanalsobe considered as embedded systems.

第9页：习题8.2 一 判断正误

习题8.2 一 判断正误：根据课文内容判断下列说法正误。

Put“true”or“false”in the brackets for the following statements according to the passage.

1. ()A game controller goes through a series of steps and actions that require less processing power than a standalone computer.
2. ()The embedded system is supposed to handle complex tasks.
3. ()The moment PDAsachieve full desktop computer functionalities, they maybe cons i-dered embedded systems.
4. ()Originally, an embedded system has a user interface.
5. ()Many modern embedded systems have full-scale user interfaces which are only inputs for data but are not supposed to provide additional functionality for the system.
6. ()The key characteristic of an embedded system is that it is supposed to handle a few simple tasks.
7. ()Originally, programs were already incorporated into the embedded system.
8. ()Limited functionality is the key in defining these as embedded systems.

第10页：习题8.2 二 练习

习题8.2 二 练习：根据课文内容完成下列练习。

Fillinthe blanks according to the passage.

1. Originally, an embedded system had no user interface-information and programs were already___________into the system.
2. Acash register or an ATMwith touchscreen technology is considered an embedded system since it has_______uses, even if the user interface (the touchscreen)isa______system.
3. Originally, in an embedded system there was no need for human_________or________except to install the device and test it.
4. _________like the USBcanalsobe considered as embedded systems.
5. ___________is the key in defining these as embedded systems.
6. The key characteristic of an embedded system is that it is supposed to handle a___________________________.
7. The moment PDAsachieve full desktop computer functionalities, they may no longer be considered_____________________.
8. Acash register or an ATMwith touchscreen technology is considered an embedded system since___________________________.

第11页：习题8.2 三 翻译

习题8.2 三 翻译：将下列单词和短语译成中文。

Translate the following words and expressions into Chinese.

1. user interfaces
2. limited functionality
3. Intercontinental Ballistic Missile
4. PDA
5. touchscreen
6. simple systems
7. CPUplatforms
8. LED
9. peripheral
10. cash register