1、7.3 Embedded Systems,Get it Running,Contents,Types of Embedded Systems,Firmware,Other Characteristics,Embedded System Examples,High-volume Embedded Systems,Low-volume Embedded Systems,Embedded System,What is an Embedded System?What is the function of Embedded Systems?,Embedded System,An Embedded Sys
2、tem is a special-purpose system in which the computer is completelyencapsulated by the device it controls.,嵌入式系统,特殊用途/目的,封装，压缩,Embedded System,Unlike a general-purpose computer, an Embedded System performs pre-defined tasks, usually with very specific requirements.,通用的,预先定义的,要求，需求,Embedded System,Em
3、bedded System Examples,Automatic Teller Machine 自动取款机,路由器,微波炉,集成系统,Embedded System Examples,约束，限制,允许，承认,Embedded System,What are High-volume Embedded Systems?What are Low-volume/Prototype Embedded Systems?,High-volume Embedded System,便携式的,机顶盒,卫星,High-volume Embedded System,For High-volume Embedded S
4、ystems, minimizing cost is usually the primarydesign consideration.,成本最小化,主要的,设计考虑,High-volume Embedded System,Engineers typically select hardwarethat is just “good enough” to implementthe necessary functions.,代表性地,贯彻，实现,必要功能,Low-volume Embedded System,For Low-volume or prototype embedded systems, p
5、ersonal computer hardware can be used. Only the programs and the operating system are limited or replaced.,原型,程序,限制,替换,Embedded System,What is Firmware?What is the environment for running Firmware?,Firmware（固件）,Firmware is stored in,Read-Only Memory 只读存储器,闪存,Firmware,The firmware often runs with lim
6、ited hardware resources:,小键盘或无键盘,无显示器,少量内存,Other Characteristics,Embedded systems reside in machines that are expected to run continuously for years without errors, and in some cases to recover by themselves if an error occurs.,存在于，植入,连续的，持续的,错误,发生,Other Characteristics,The software is usually devel
7、oped and tested more carefully, and unreliable mechanical moving parts are avoided. Such as:,磁盘驱动器,交换机,按钮,Other Characteristics,Embedded Systems range from to:,只专注于单一任务,无用户界面,完整用户界面,Other Characteristics,The rise of the World Wide Web has given embedded designers another quite different option, by providing a Web page interface over a network connection.,万维网,设计者,选择,Summary,Types of Embedded Systems,Firmware,Other Characteristics,Embedded System Examples,High-volume Embedded Systems,Low-volume Embedded Systems,The End,策 划： 张宏岩 张 翼 制作人员：大连东软信息学院英语系 ：张 翼 杨 毅 李国际 李 黎 杨晓轩 孙建军 审 校：王慧玉,
