Ravel-XL: a hardware accelerator for assigned-delay compiled-code logic gate simulation

Abstract

Ravel-XL is a single-board hardware accelerator for gate-level digital logic simulation. It uses a standard levelizedcode approach to statically schedule gate evaluations. However, unlike previous approaches based on levelized-code scheduling, it is not limited to zero-or unit-delay gate models and can provide timing accuracy comparable to that obtained from event-driven methods. We review the synchronous waveform algebra that forms the basis of the Ravel-XL simulation algorithm, present an architecture for its hardware realization, and describe an implementation of this architecture as a single VLSI chip. The chip has about 900 000 transistors on a die that is approximately 1.4 cm', requires a 256 pin package and is designed to run at 33 MHz. A Ravel-XL board consisting of the processor chip and local instruction and data memory can simulate up to one billion gates at a rate of approximately 6.6 million gate evaluations per second. To better appreciate the tradeoffs made in designing Ravel-XL, we compare its capabilities to those of other commercial and research software simulators and hardware accelerators.

C3W semantic Temporal Entanglement Modelling for Human - Machine Interfaces

“…2005;Phan Luong, 1999;Tancredi, 2007;Zizzi, 2003;Wikipedia;Als, 1999;Bellinger, 2004 medium; device; source, destination, channel; capability; amount; capacity; storage; control; content; compression; detection' learning; acquisition; strings; computation Processing Kremer, 1998;Brand, 1993;Wikipedia;Wikipedia;Antsaklis, 1997;Carbonell, 1979;Coppock. 2005;Kiss, 2004;Phan Luong, 1999;Tancredi, 2007;Eiter et al, 1999;Zizzi, 2003;Nepa, et al 2006;Wikipedia;Riepe et al, 1994;Riedel et al 2003;Als, 1999; measurement; mathematical; observation; rates, properties; statistical, quantification; methods; characters; assumptions; logical; semantic; relationship; category; constructs; definition; redundancy Parameters www.intechopen.com Bellinger, 2004FEDEE, 2002Kremer, 1998;Wikipedia;Coppock. 2005;Bellinger, 2004 conditional;entropies: equivocation;conditions;optimal Conditions FEDEE, 2002;NSF, 2004;Brand, 1993;Sturm, 1994;Wikipedia;Antsaklis, 1997;Sowa, 2006;Carbonell, 1979;…”

“…2005;Bellinger, 2004 conditional;entropies: equivocation;conditions;optimal Conditions FEDEE, 2002;NSF, 2004;Brand, 1993;Sturm, 1994;Wikipedia;Antsaklis, 1997;Sowa, 2006;Carbonell, 1979;Coppock. 2005;Tancredi, 2007;Zizzi, 2003;Wikipedia;Riepe et al, 1994;Riedel et al 2003;Bellinger, 2004 uncertainty; ambiguity; failure; distortion; additions; problems; random noise, beyond control; complexity; limitations; nonsense; improbability; negative feedback; random variable; ergodic; error; disorder NSF, 2004;Brand, 1993;Sowa, 2006;Carbonell, 1979;Kiss, 2004;Kondratyev et al, 1999;Tancredi, 2007;Eiter et al, 1999;Wikipedia;Riepe et al, 1994;Riedel et al 2003;Bellinger, 2004 probabilities; prediction; selection, perception, memory; decision making; performances; choice; testing; accuracy; reliability; skills; analysis; determination; application; synonyms; simulations Foresight Table 5. Literature Review to get Information Theory Themes.…”

“… Symptoms: effects-factors specific to an event or occurrence  Immediate cause: explains why the event or occurrence has occurred  Remote cause: may explain why the event or occurrence has occurred (Riepe et al, 1994;Riedel et al, 2003).…”

“…Logic gate need a level of simulation that provides comparable accuracy and control of events without expensive code pre-processing (Riepe et al, 1994). Digital circuits known as combinational circuits occur with cycles (Riedel et al, 2003).…”

“…The theory of the probability of transmission of messages with specified accuracy when the bits of information constituting the messages are subject, with certain probabilities, to transmission failure, distortion, and accidental additions (Answers, 2008) (Kremer, 1998;NSF, 2004;Brand, 1993;Ronczka, 2006;Sturm, 1994;Wikipedia;Antsaklis, 1997;Sowa, 2006;Carbonell, 1979;Coppock. 2005;Nepa, et al 2006;Wikipedia, 2009;Riepe et al, 1994;Als, 1999;Bellinger, 2004 information; data; binary digits Message FEDEE, 2002;Kremer, 1998;NSF, 2004;Brand, 1993;Ronczka, 2006;Sturm, 1994;Wikipedia;Antsaklis, 1997;Carbonell, 1979;Kiss, 2004;Kondratyev et al, 1999;Wikipedia, 2009;Als, 1999;Bellinger, 2004 signal; code, transmit, event; decode; patterns; state; communication; generate; destination; receive Transmission Kremer, 1998;Brand, 1993;Sturm, 1994;Wikipedia;Wikipedia;Sowa, 2006;Carbonell, 1979;Coppock. 2005;Phan Luong, 1999;Tancredi, 2007;Zizzi, 2003;…”