电子信息工程专业英语课件现代数字设计.ppt

《电子信息工程专业英语教程》 Unit 5 Modern Digital Design Lesson 13 Overview of Modern Digital Design Lesson 13 Overview of Modern Digital Design Terminology CD: compact disc　 光盘 LP: long playing 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 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 Terminology ASIC: Application Specific Integrated Circuit　 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 Electronic circuit design analogue design digital design mixed-signal design Digital electronics is ever more significant in consumer goods… The lifetimes of products have lessened… Digital design has become very dependent on CAD – also known as DA or EDA The EDA tools allow two tasks to be performed Synthesis Simulation Methods for digital design description schematic capture hardware description language (HDL) Verilog VHDL The basic building blocks of digital circuits A gate is an electronic component with a number of inputs 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 inputs to generate the output. 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 shown 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. Full-custom and semi-custom ICs ASICs Programmable logic devices PLAs (programmable logic arrays ) PALs (programmable array logic) CPLDs (complex PLDs) FPGAs (field pr