Lesson 26 Arm电子技术专业英语教程

1、2020/7/5,电子技术专业英语教程,1,Unit9 Microcomputer,Lesson 26 Arm 电子技术专业英语教程冯新宇 主编 电子工业出版社 ,2020/7/5,电子技术专业英语教程,2,Lesson 26 Arm,Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2020/7/5,电子技术专业英语教程,3,Terminology RISC 【计】精简指令集计算机 reduced instruction set computer BBC n.英国广播公司

2、 coprocessor n.【计】协处理器 date back to 从时就有，回溯到 interrupt latency 中断延迟 MMU 【计】存储器管理单元,Backgrounds,2020/7/5,电子技术专业英语教程,4,Text tour,Outline - Introduction ARMv1, ARMv2 and ARMv2a ARMv3 ARM6 and ARM7 ARMv4 ARM7TDMI-S and Thumb ARMv5 ARM9EJS ARMv5 ARM10 ARMv6 ARM10, ARM11,2020/7/5,电子技术专业英语教程,5,Introduction

3、,The ARM architecture is a 32-bit advanced RISC design. The use of a simple design and a highly orthogonal, yet powerful instruction set allows it to attain good processing speeds at low power consumption. As the demand for greater processing power in embedded devices keeps increasing, so does the p

4、opularity of ARM. The architecture is licensed by a large number a microprocessor manufacturers, leading to a wide choice and availability of ARM based CPUs and microcontrollers. Current ARM based CPUs are powerful enough to allow a large variety of DSP processing tasks to be performed without the u

5、se of a coprocessor.,2020/7/5,电子技术专业英语教程,6,ARMv1, ARMv2 and ARMv2a,Introduced in 1985, the ARM1 was the first incarnation of the ARMv1 architecture, a 32 bits architecture, using 26 bits addressing. The ARMv2 and ARM2 added multiplication and multiply-accumulate capability, as well as coprocessor su

6、pport. The ARM3 (using ARMv2a) added a 4k on-chip code and data cache.,2020/7/5,电子技术专业英语教程,7,ARMv3 ARM6 and ARM7,ARMv3 moved the ARM architecture toward full 32 bits addressing, and also allowed for chips to optionally contain a Memory Management Unit (MMU), allowing the chip to run full operating s

7、ystems. ARMv3M added optional long multiplication support (32 32 = 64 bits), marked by an M in the processor type name.,2020/7/5,电子技术专业英语教程,8,ARMv4 ARM7TDMI-S and Thumb,The ARMv4 is a further evolution of the ARMv3 design, adding support for 16 bits load and stores, and dropped support for 26-bit ad

8、dressing. It was introduced in 1995. A major step forwards in the ARM architecture was made by the introduction of Thumb in ARMv4T. Thumb is a new instruction set for the ARM architecture, using 16 bits instructions. It represents a significant enhancement to the ARM architecture, because it allows

9、many operations to be performed at a significantly reduced code size. It is very useful in situations where bus or memory bandwidth or space is limited. The Thumb instructions are slightly less capable than the ARM counterparts, notably lacking conditional execution, shift/rotation support, and not

10、allowing access to the entire register file. Because of the loss of orthogonality and cleanness, Thumb code is generally not written by hand.,2020/7/5,电子技术专业英语教程,9,ARMv5 ARM9EJS,The ARMv5 makes the optional Thumb and wide multiply features of the ARMv3 the default, and adds the following: . Some ext

11、ra instructions for smoother switching between ARM and Thumb states. . Enhanced DSP support, including faster 16 bits multiplies and saturating arithmetic, and a faster MAC. Marked by an (E) in the chip name. . Jazelle, allowing the ARM core to execute some Java bytecode instructions in hardware. Ja

12、zelle is an essential component in the Java support included in many mobile phones. Marked by a (J) in the chip name.,2020/7/5,电子技术专业英语教程,10,ARMv5 ARM10,The ARM10 is an evolution of the ARMv5 architecture aimed at maximal performance. It extends the pipeline to 6 stages, and includes support for a f

13、loating point coprocessor (VFP). It is projected to run at speeds of around 260 MHz.,2020/7/5,电子技术专业英语教程,11,ARMv6 ARM10, ARM11,The ARMv6 adds memory management features, a new multimedia instruction set, and a longer pipeline (8 stages), allowing even higher clock speeds, up to 335 MHz. The new mult

14、imedia instructions are SIMD3 and resemble the MMX, SSE and SSE2 instructions sets as used on common PCs. ARMv6 was introduced in 2001. Neither the ARM10 nor ARM11 have had significant uptake in the market yet, and are not nearly as widely available as the ARM7TDMI and the ARM9EJS. Of course, this m

15、ay change as time passes.,2020/7/5,电子技术专业英语教程,12,Vocabulary expandability encouragement inefficiency license staff Structure Reading/writing techniques,Language in use,2020/7/5,电子技术专业英语教程,13,Vocabulary,2020/7/5,电子技术专业英语教程,14,expandability in dictionary,On cf-expandability and csf-expandability() 关于c

16、f可膨胀性和csf可膨胀性() An Expandability enhanced BSM Design 增强扩展能力的BSM设计 The business system enjoys excellent expandability. 业务系统具有很好的可扩展性。,2020/7/5,电子技术专业英语教程,15,expandability in text,The BBC Micro was, for its time, an advanced machine with good expandability and a rugged design a necessary feature since

17、 it was widely used for teaching computer skills in classrooms. 在那时，BBC Micro是先进的机器，它有良好的可扩展性和坚固的设计必要的特征，此后，在课堂上它被广泛地用于计算机技能教学。,2020/7/5,电子技术专业英语教程,16,encouragement in dictionary,Giving help, encouragement or sympathy 给予帮助、鼓励或同情的；支持的；支援的；赞助的 Thank you for your encouragement. 谢谢你的鼓励。 This gave us gre

18、at encouragement. 这给了我们很大鼓舞。 an expression of approval and encouragement. 同意或鼓励的一种表示。 He is unstinting in his encouragement. 他不吝惜于给与人鼓励。,2020/7/5,电子技术专业英语教程,17,encouragement in text,This served as an encouragement: if a group of graduate students could come up with competitive new CPU designs, then

19、Acorn surely had a good chance of succeeding. 这是一个鼓励：如果一组研究生可以拿出有竞争力的新的CPU设计，然后Acron肯定有很好的成功机会。,2020/7/5,电子技术专业英语教程,18,inefficiency in dictionary,The investigation showed up the inefficiency of the management. 这次调查反映出管理效率不高。 In his speech he kept pounding away at his opponents inefficiency. 他在演说中不断攻

20、击他的对手不称职。 The inefficiency of one department can bring a whole industry into disrepute. 只要有一个部门的效率不高，就会使整个行业的名声受到影响。 Weve been badly hung if through the inefficiency of the post office. 我们都受过邮局工作效率不高的苦。,2020/7/5,电子技术专业英语教程,19,inefficiency in text,The first experiences with writing system software fo

21、r the ARM pointed to some inefficiency, and those were resolved quickly in the ARM2. ARM在第一次运行系统软件过程中发现不足，很快在ARM2中得到解决。,2020/7/5,电子技术专业英语教程,20,license in dictionary,Having no official license. 不具有正式执照的 This license is no-good. 这驾照已经无效了。 A license fee; tuition fees. 执照费；学费 Jot down his license number

22、. 记下那个人的牌照号码！ To make legally capable; license. 准予使法律上可行；领发执照,2020/7/5,电子技术专业英语教程,21,license in text,The actual silicon production is handled by the licensees. 在那时这个新设备的推出并不是非常成功。,2020/7/5,电子技术专业英语教程,22,staff in dictionary,A staff of inspectors. 检查人员的总称 Headquarters of the General Staff 总参谋部 welfare for workers and staff 职工福利 a ceremonial or emblematic staff. 礼仪性或者象征性手杖。 A staff party, roo