Download Reuse Methodology Manual: For System-on-a-Chip Designs by Michael Keating PDF

By Michael Keating

Silicon know-how now permits us to construct chips inclusive of hundreds of thousands of transistors. This know-how not just supplies new degrees of approach integration onto a unmarried chip, but in addition provides major demanding situations to the chip fashion designer. accordingly, many ASIC builders and silicon owners are re-examining their layout methodologies, looking for how you can make potent use of the massive numbers of gates now on hand.
those designers see present layout instruments and methodologies as insufficient for constructing million-gate ASICs from scratch. there's massive strain to maintain layout staff dimension and layout schedules consistent whilst layout complexities develop. instruments should not offering the productiveness profits required to maintain velocity with the expanding gate counts to be had from deep submicron know-how. layout reuse - using pre-designed and pre-verified cores - is the main promising chance to bridge the distance among to be had gate-count and dressmaker productiveness.
Reuse method handbook for System-On-A-Chip Designs, moment Edition outlines a good technique for developing reusable designs to be used in a System-on-a-Chip (SoC) layout technique. Silicon and gear applied sciences stream so quick that no unmarried method delivers an enduring technique to this hugely dynamic challenge. as a substitute, this guide is an try and seize and incrementally increase on present most sensible practices within the undefined, and to offer a coherent, built-in view of the layout strategy. Reuse method handbook forSystem-On-A-Chip Designs, moment Edition may be up to date regularly due to altering expertise and more suitable perception into the issues of layout reuse and its position in generating top quality SoC designs.

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With increasing time-to-market pressures, design teams have been looking at ways to accelerate this process. Increasingly powerful tools, such as synthesis and emulation tools, have made significant contributions. Developing libraries of reusable macros also aids in accelerating the design process. 16 Reuse Methodology Manual Goal: Maintain parallel interacting design flows SYSTEM DESIGN AND VERIFICATION PHYSICALl Physical specification: area, power, clock tree design I- - - -- Preliminary floorplan ~ ¢> - ¢> - - -- Updated floorplans I- - -- Updated floorplans - - -Trial placement [ TIMING ¢> - ¢> - ¢> l Timing specification: 1/0 timing, clock frequency 1---- Block timing specification f---- Block synthesis I- - I- - -- -- Top-level synthesis HARDWAREl SOFTWARE Hardware specification ¢> - ¢> - ¢> Algorithm development & macro decomposition I- - -- -Block verification - - - -- ¢> 1-- ¢> Software specification ~ - -- Block selection!

For example, the PCI specification requires several levels of logic between the PCI bus and the first flop in the PCI interface block, for several critical control signals. In this case we cannot register all the inputs of the PCI bus directly; but as a result we must floorplan the chip so that the PCI block is very close to the I/O pads for those critical control signals. Registering the interfaces to the major blocks of a design is the single most powerful tool in ensuring timing closure. Localizing timing closure issues allows the synthesis, timing analysis, and timing-driven place and route tools to work effectively.

These are formulated into a preliminary specification, often written jointly by engineering and marketing. Then, a high-level illgorithmic model for the overall system is developed, usually in C/C++. Tools such as COSSAP, SPW, and Matlab may be more useful for some algorithmic-intensive designs, and tools such as Bones, NuThena, SDT more useful for control dominated designs. This high-level model provides an executable specification for the key functions of the system. It can then be used as the reference for future versions of the design.

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