Download e-book for iPad: Designing SOCs with Configured Cores: Unleashing the by Steve Leibson

By Steve Leibson

ISBN-10: 0080472451

ISBN-13: 9780080472454

Microprocessor cores used for SOC layout are the direct descendents of Intel’s unique 4004 microprocessor. simply as packaged microprocessor ICs differ largely of their attributes, so do microprocessors packaged as IP cores. even if, SOC designers nonetheless evaluate and choose processor cores the best way they formerly in comparison and chosen packaged microprocessor ICs. the large challenge with this feature process is that it assumes that the legislation of the microprocessor universe have remained unchanged for many years. This assumption isn't any longer valid.

Processor cores for SOC designs might be way more plastic than microprocessor ICs for board-level process designs. Shaping those cores for particular functions produces far better processor potency and masses decrease approach clock premiums. jointly, Tensilica’s Xtensa and Diamond processor cores represent a kinfolk of software-compatible microprocessors protecting a very huge functionality variety from easy regulate processors, to DSPs, to 3-way superscalar processors. but all of those processors use an analogous software-development instruments in order that programmers accustomed to one processor within the relations can simply swap to another.

This publication emphasizes a processor-centric MPSOC (multiple-processor SOC) layout kind formed by way of the realities of the 21st-century and nanometer silicon. It advocates the task of initiatives to firmware-controlled processors each time attainable to maximise SOC flexibility, reduce energy dissipation, decrease the dimensions and variety of hand-built common sense blocks, decrease the linked verification attempt, and reduce the general layout hazard.

· a vital, no-nonsense consultant to the layout of 21st-century mega-gate SOCs utilizing nanometer silicon.
· Discusses modern key matters affecting SOC layout, according to author's many years of private adventure in constructing huge electronic platforms as a layout engineer whereas operating at Hewlett-Packard's machine computing device department and at EDA computing device pioneer Cadnetix, and masking such issues as an award-winning know-how journalist and editor-in-chief for EDN journal and the Microprocessor Report.
· Explores conventionally permitted barriers and perceived limits of processor-based approach layout after which explodes those synthetic constraints via a clean outlook on and dialogue of the certain talents of processor cores designed in particular for SOC design.
· Thorough exploration of the evolution of processors and processor cores used for ASIC and SOC layout with a glance at the place the has come from, and the place it is going.
· Easy-to-understand reasons of the services of configurable and extensible processor cores via a close exam of Tensilica's configurable, extensible Xtensa processor center and 6 pre-configured Diamond cores.
· the main complete overview to be had of the sensible facets of configuring and utilizing a number of processor cores to accomplish very tough and bold SOC expense, functionality, and tool layout ambitions.

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Extra info for Designing SOCs with Configured Cores: Unleashing the Tensilica Xtensa and Diamond Cores

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This preference reflects a change in SOCdesign philosophy from the design style in vogue just a few years before. In the late 1990s, most SOC designs employed just one processor core. Any additional processing was performed by RTL blocks. The reason for using this older design style was, primari]y, a scarcity of gates on chip. 11 The Rise of MPSOC Design 25 ASIC technology at the time could scarcely accommodate one processor core and its memory. Squeezing several processors onto a chip was simply out of the question.

MSeymour Cray Academic researchers, system-on-chip (SOC) designers, and ASIC and EDA vendors are in a fair a m o u n t of agreement as to what must be done to reduce SOC design risks. SOC designs m u s t become flexible enough to a c c o m m o d a t e design changes brought on by design errors, spec changes, standards changes, and competitive market forces. Designing additional flexibility into an SOC allows one chip design to serve several products and multiple product generations. One way to add flexibility to an SOC is to add firmware programmability through microprocessor cores.

2 shows an expanded ASIC design flow. 1 and shows the people involved at each design step, the tasks they perform, and the tools used to perform each of the tasks. This figure provides a better view into the steps needed to convert a system definition into a placed and routed netlist that is ready for chip fabrication. 1 lacked. 2 still falls short of showing an SOC design flow (as opposed to an ASIC design flow) because the entire SOC design occupies just one box--a task to be performed by the system architect.

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Designing SOCs with Configured Cores: Unleashing the Tensilica Xtensa and Diamond Cores by Steve Leibson

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