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研究生: 李曉屏
Hsiao-Ping Lee
論文名稱: 適用於通訊系統之內嵌式數位訊號處理器
An Embedded DSP Core for Communication Applications
指導教授: 周世傑
Shyh-Jye Jou
口試委員:
學位類別: 碩士
Master
系所名稱: 資訊電機學院 - 電機工程學系
Department of Electrical Engineering
畢業學年度: 89
語文別: 中文
論文頁數: 71
中文關鍵詞: 數位信號處理器可參數化低功率高速的效能通訊系統應用
外文關鍵詞: Digital signal processing processor, parameterized, low power, high performance, communication systems
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  • 在本篇論文中,實現了一顆十六位元的可程式化數位信號處理器。它是專用於通訊系統應用。除了提供一般十六位元數位處理器所具備的基本指令集外,還為了特別的功能硬體設計,提供特殊指令。這使得這顆數位信號處理器更適於計算密集的應用。
    我們所提出的數位信號處理器具有幾項優越的特性: 可參數化的架構,高速的效能,和低功率。我們設計了各種模組產生器以產生可變動(configurable)的資料路徑(dat apath)和可重複使用的特殊功能硬體。平行化的架構也加速了效能,在效能測試程式中兩組乘法器串聯加法器減少一半的指令週期。為了減少功率耗損,我們採用許多種低功率設計技巧,如灰碼記憶體定址法和管線分享技巧等。
    這顆數位信號處理器的最大工作效能可操作在每秒100百萬指令之



    The proposed DSP processor has some advanced features: a parameterized architecture, high-speed performance, and low power. So various module generators are designed to generate configurable datapath and reusable special function blocks. In addition, we use high degree of parallelism to speed up its performance. The data path contains two Multiply-Accumulate units to reduce half instruction cycles in the performance benchmarks. To reduce power consumption, we use some low power designs such as gray code memory addressing, pipeline sharing techniques.
    The chip was implemented in a cell-base design method using a 0.35 1P3M cell-library. The maximum performance of NCU_DSP is 100MHz.

    Content CHAPTER 1 INTRODUCTION1 1.1 Motivation1 1.2 Evolution of Communication DSP Processors3 1.3 Applications-Specific DSP For Communication and Embedded System5 1.4 Thesis Organization7 CHAPTER 2 ARCHITECTURE OF DSP CORE8 2.1 The Overview of NCU_DSP Architecture8 2.2 Program Address Generation Unit8 2.2.1 A Basic Operation of Program Address Generation8 2.2.2 Hardware Looping9 2.2.3 Conditional/Unconditional Branches, Calls and Returns12 2.2.4 The Analysis of Synthesis Result15 2.3 Data Address Generation Unit15 2.3.1 The Analysis of Synthesis Result19 2.3.2 Summary……………………………………………………….20 2.4 Memory Architecture20 2.5 Computational Unit21 2.5.1 Data path 21 2.5.2 Application-Specific Function Blocks23 2.6 Parameterized DSP Core23 2.7 Summary24 CHAPTER 3 INSTRUCTION SETS26 3.1 Introduction26 3.2 Design of Instruction Sets26 3.3 Instruction Types27 3.3.1 Arithmetic and Logic Operation28 3.3.2 Shifting and Comparisons28 3.3.3 Program Flow Control29 3.3.4 Special Function Instructions29 3.4 NCU_DSP''s Instruction Sets vs. TIC54x''s30 3.5 Summary32 CHAPTER 4 PIPELINE ARCHITECTURE OF DATA PATH33 4.1 Introduction33 4.2 Unconditional Branch Operation In The Pipeline39 4.3 Conditional Branch Instructions In The Pipeline Operation40 4.4 Pipeline Hazards43 4.4.1 Control Hazards43 4.4.2 Structure Hazards44 4.4.3 Data Hazards and Forwarding45 CHAPTER 5 LOW POWER DESIGNS48 5.1 Low Power Architecture48 5.2 Gray Coded Addressing49 5.3 Pipeline Sharing51 5.4 Variable Word Instruction Set (VLIS)53 5.5 Summary54 CHAPTER 6 CHIP IMPLEMENTATION AND SIMULATION RESULTS55 6.1 Design Flow55 6.2 Synthesis Result55 6.3 Place and Rout Result57 6.4 Benchmarks Simulation58 6.4.1 FIR Filter58 6.4.2 Square Distance60 6.4.3 Inner Hardware Looping61 6.5 Comparison61 CHAPTER 7 CONCLUSIONS63 Appendix A: Instruction Sets64 References …..………………70

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