Designing SOCs with Configured Cores

1st Edition

Unleashing the Tensilica Xtensa and Diamond Cores

Print ISBN: 9780123724984
eBook ISBN: 9780080472454
Imprint: Morgan Kaufmann
Published Date: 11th July 2006
Page Count: 344
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Microprocessor cores used for SOC design are the direct descendents of Intel’s original 4004 microprocessor. Just as packaged microprocessor ICs vary widely in their attributes, so do microprocessors packaged as IP cores. However, SOC designers still compare and select processor cores the way they previously compared and selected packaged microprocessor ICs. The big problem with this selection method is that it assumes that the laws of the microprocessor universe have remained unchanged for decades. This assumption is no longer valid.

Processor cores for SOC designs can be far more plastic than microprocessor ICs for board-level system designs. Shaping these cores for specific applications produces much better processor efficiency and much lower system clock rates. Together, Tensilica’s Xtensa and Diamond processor cores constitute a family of software-compatible microprocessors covering an extremely wide performance range from simple control processors, to DSPs, to 3-way superscalar processors. Yet all of these processors use the same software-development tools so that programmers familiar with one processor in the family can easily switch to another.

This book emphasizes a processor-centric MPSOC (multiple-processor SOC) design style shaped by the realities of the 21st-century and nanometer silicon. It advocates the assignment of tasks to firmware-controlled processors whenever possible to maximize SOC flexibility, cut power dissipation, reduce the size and number of hand-built logic blocks, shrink the associated verification effort, and minimize the overall design risk.

Key Features

· An essential, no-nonsense guide to the design of 21st-century mega-gate SOCs using nanometer silicon. · Discusses today's key issues affecting SOC design, based on author's decades of personal experience in developing large digital systems as a design engineer while working at Hewlett-Packard's Desktop Computer Division and at EDA workstation pioneer Cadnetix, and covering such topics as an award-winning technology journalist and editor-in-chief for EDN magazine and the Microprocessor Report. · Explores conventionally accepted boundaries and perceived limits of processor-based system design and then explodes these artificial constraints through a fresh outlook on and discussion of the special abilities of processor cores designed specifically for SOC design. · Thorough exploration of the evolution of processors and processor cores used for ASIC and SOC design with a look at where the industry has come from, and where it's going. · Easy-to-understand explanations of the capabilities of configurable and extensible processor cores through a detailed examination of Tensilica's configurable, extensible Xtensa processor core and six pre-configured Diamond cores. · The most comprehensive assessment available of the practical aspects of configuring and using multiple processor cores to achieve very difficult and ambitious SOC price, performance, and power design goals.


PRIMARY: Industry practitioners; System-on-Chip engineers designing embedded systems.

SECONDARY: Text for undergraduate and graduate level courses on Embedded Systems.

Table of Contents

Chapter 1: Introduction to 21st-century SOC design

Chapter 2: The SOC design flow

Chapter 3: Xtensa architectural basics

Chapter 4: Basic processor configurability

Chapter 5: MPSOC system architectures and design tools

Chapter 6: Introduction to Diamond cores

Chapter 7: The Diamond 108Mini controller core

Chapter 8: The Diamond 212GP controller core

Chapter 9: The Diamond 232L CPU core

Chapter 10: The Diamond 570T superscalar CPU core

Chapter 11: The Diamond 330HiFi superscalar audio DSP Core

Chapter 12: The Diamond 545CK superscalar DSP Core

Chapter 13: Using fixed processor cores in SOC systems

Chapter 14: Beyond fixed cores

Chapter 15: The future of SOC design


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© Morgan Kaufmann 2006
Morgan Kaufmann
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Designing SOCs with Configured Processor Cores is an essential reference for system-on-chip designers. This well-written book gives a practical introduction to three basic techniques of modern SOC design: use of optimized standard CPU and DSP processors cores, application-specific configuration of processor cores, and system-level design of SOCs using configured cores as the key building block. Readers will find it is often the first book they reach for in defining and designing their next chip. — Chris Rowen, President and CEO, Tensilica, Inc. We're poised on the brink of a revolution in computing. Instead of fixed-architecture processors suited only to general-purpose computing or special-purpose digital signal processing tasks, we're moving to system-on-chip (SoC) devices containing multiple processor cores, each configured to perform specific tasks with extreme performance while consuming ultra-low power. The surf is up - and this book tells us how to ride the wave! — Clive “Max” Maxfield, President, TechBites Interactive and author of The Design Warrior’s Guide to FPGAs Steve Leibson's book is a gentle introduction to the art of digital electronics design capturing an important moment in the creation of the complete system on a chip. Generously dotted with block diagrams and snippets of code using the vehicle furnished by Xtensa technology, the book takes the reader through the evolution that led to multiple cores and configurable engines. — Max Baron, Senior Analyst at The Microprocessor Report