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1、Unit 5 Modern Digital Design,Lesson 13 Overview of Modern Digital Design,2018/10/20,电子信息工程专业英语教程,2,Lesson 13 Overview of Modern Digital Design,Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2018/10/20,电子信息工程专业英语教程,3,Terminology CD: compact disc 光盘 LP: long play
2、ing record 慢转密纹唱片 CAD: Computer Aided Design 计算机辅助设计 EDA: Electronic Design Automatic 电子设计自动化,Backgrounds,2018/10/20,电子信息工程专业英语教程,4,Terminology HDL: Hardware Description Language 硬件描述语言 VHDL极高速集成电路(VHSIC)硬件描述语言,Backgrounds,2018/10/20,电子信息工程专业英语教程,5,Terminology ASIC: Application Specific Integrated C
3、ircuit 专用集成电路 PLD: Programmable Logic Device 可编程逻辑器件 PLA: Programmable Logic Array 可编程逻辑阵列 RTL: Register Transfer Level 寄存器传送级,Backgrounds,2018/10/20,电子信息工程专业英语教程,6,Text tour,Outline Introduction Design automation Logic gates ASICs and FPGAs Design flow,2018/10/20,电子信息工程专业英语教程,7,Introduction,Electro
4、nic circuit design analogue design digital design mixed-signal design Digital electronics is ever more significant in consumer goods The lifetimes of products have lessened,2018/10/20,电子信息工程专业英语教程,8,Design automation,Digital design has become very dependent on CAD also known as DA or EDA The EDA too
5、ls allow two tasks to be performed Synthesis Simulation Methods for digital design description schematic capture hardware description language (HDL) Verilog VHDL,2018/10/20,电子信息工程专业英语教程,9,Logic gates,The basic building blocks of digital circuits A gate is an electronic component with a number of inp
6、uts and, generally, a single output. The inputs and the outputs are normally in one of two states: logic 0 or logic 1. These logic values are represented by voltages (for instance, 0 V for logic 0 and 3.3 V for logic 1) or currents. The gate itself performs a logical operation using all of its input
7、s to generate the output.,2018/10/20,电子信息工程专业英语教程,10,It is possible to buy a single integrated circuit containing, say, four identical gates, as shown in Figure 5.1. (Note that two of the connections are for the positive and negative power supplies to the device. These connections are not normally s
8、hown in logic diagrams.) A digital system could be built by connecting hundreds of such devices together - indeed many systems have been designed in that way.,Figure 5.1 A small-scale integrated circuit,Logic gates,2018/10/20,电子信息工程专业英语教程,11,ASICs and FPGAs,Full-custom and semi-custom ICsASICs Progr
9、ammable logic devices PLAs (programmable logic arrays ) PALs (programmable array logic) CPLDs (complex PLDs) FPGAs (field programmable gate arrays).,2018/10/20,电子信息工程专业英语教程,12,Figure 5.2 PLA structure.,ASICs and FPGAs,2018/10/20,电子信息工程专业英语教程,13,Design flow,Write a specification. If necessary, partit
10、ion the design into smaller parts and write a specification for each part. From the specification draw a state machine chart. This shows each state of the system and the input conditions that cause a change of state, together with the outputs in each state. Minimize the number of states. This is opt
11、ional and may not be useful in all cases.,2018/10/20,电子信息工程专业英语教程,14,Design flow,Assign Boolean variables to represent each state. Derive next state and output logic. Optimize the next state and output logic to minimize the number of gates needed. Choose a suitable placement for the gates in terms o
12、f which gates share integrated circuits and in terms of where each integrated circuit is placed on the printed circuit board Design the routing between the integrated circuits.,2018/10/20,电子信息工程专业英语教程,15,Text tour,Figure 5.3 The overall design flow for RTL synthesis-based design,2018/10/20,电子信息工程专业英
13、语教程,16,Vocabulary capture, effective, term sequential, specification Structure Reading/writing techniques,Language in use,2018/10/20,电子信息工程专业英语教程,17,Vocabulary,2018/10/20,电子信息工程专业英语教程,18,Capture in dictionary,To take captive, as by force or craft; seize.俘虏；捕获 To gain possession or control of, as in
14、a game or contest:赢得，夺取 To attract and hold:吸引 tales of adventure that capture the imagination. To succeed in preserving in lasting form:长久保存 capture a likeness in a painting. 保存一幅油画中的人物肖像,2018/10/20,电子信息工程专业英语教程,19,Capture in dictionary,The phenomenon in which an atom or a nucleus absorbs a subatom
15、ic particle, often with the subsequent emission of radiation.俘获,2018/10/20,电子信息工程专业英语教程,20,Capture in text,Synthesis and simulation EDA tools require that the design be transferred from the designers imagination into the tools themselves. This can be done by drawing a diagram of the design using a g
16、raphical package. This is known as schematic capture. EDA综合工具和模拟工具均要求设计者将想法转化为设计。使用图形化软件包画设计原理图可以实现这一步。这种方法称之为“原理图输入” 。,2018/10/20,电子信息工程专业英语教程,21,Capture in use,hole capture 空穴俘获 orbital electron capture 轨道电子俘获 signal capture 信号俘获,2018/10/20,电子信息工程专业英语教程,22,Effective in dictionary,Having an intende
17、d or expected effect. 有效的 Producing a strong impression or response; striking 深刻印象的 gave an effective performance as Othello. Operative; in effect 有效的；生效的 The law is effective immediately. Existing in fact; actual 实在的，实际的 a decline in the effective demand. Prepared for use or action, especially in warfare. 有战斗力的，备战的,
