By William J. Dally
What makes a few pcs gradual? What makes a few electronic structures function reliably for years whereas others fail mysteriously each few hours? Why do a little platforms burn up kilowatts whereas others function off batteries? those questions of pace, reliability, and tool are all decided by way of the system-level electric layout of a electronic approach. electronic platforms Engineering offers a accomplished therapy of those themes. It combines a rigorous improvement of the elemental ideas in each one zone with down-to-earth examples of circuits and strategies that paintings in perform. The ebook not just can function an undergraduate textbook, filling the space among circuit layout and good judgment layout, but additionally will help practising electronic designers stay alongside of the rate and gear of contemporary built-in circuits. The innovations defined during this e-book, that have been as soon as used merely in supercomputers, at the moment are necessary to the right kind and effective operation of any form of electronic method.
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These transistor-level compaction techniques adjust power levels to tune the circuit for performance. This reduces area and either power or performance. Some authors of hard IP will choose to provide a block with multiple profiles, one for low power, another for high performance. For these authors, postrouting techniques are very useful. Similarly, when implementing a soft block, chip integrators can take advantage of post-routing optimizations to get a difficult block into their constraint space.
In addition to all performance sensitive VCs being pre-staged in silicon, soft or firm VCs will be provided in an emulation form for high-performance hardware/software verification. 24 Surviving the SOC Revolution VC Reuse Portfolio The transition of IP into a VC status is where the greatest productivity benefits are realized and where the separation of authoring and integration is most clearly observed. These VCs are pre-characterized, preverified, pre-modeled blocks that have been designed to target a specific virtual system environment.
Some weaknesses show when the design is large and must be partitioned, or when the design has an intrinsic structure, such as a datapath that the synthesis tool is unable to recognize. The increasing dominance of wires in the overall performance and power profile of a VC is dictating that placement and synthesis need to be merged into a single optimizing function rather than an iterative process. Overview of the SOC Design Process 37 Very aggressive design techniques, such as domino logic or special lowpower muxing structures, typically require a more custom approach.
Digital systems engineering by William J. Dally