By Richard F. Tinder
Asynchronous Sequential laptop layout and research offers a lucid, in-depth remedy of asynchronous nation computing device layout and research offered in elements: half I at the history basics relating to asynchronous sequential good judgment circuits more often than not, and half II on self-timed structures, high-performance asynchronous programmable sequencers, and arbiters. half I presents a close evaluation of the historical past basics for the layout and research of asynchronous finite kingdom machines (FSMs). incorporated are the fundamental types, use of absolutely documented country diagrams, and the layout and features of easy reminiscence cells and Muller C-elements. uncomplicated FSMs utilizing C-elements illustrate the layout strategy. The detection and removing of timing defects in asynchronous FSMs are coated intimately. this is often via the array algebraic method of the layout of single-transition-time machines and use of CAD software program for that goal, one-hot asynchronous FSMs, and pulse mode FSMs. half I concludes with the research approaches for asynchronous kingdom machines. half II is worried generally with self-timed platforms, programmable sequencers, and arbiters. It starts with an in depth therapy of externally asynchronous/internally clocked (or pausable) platforms which are delay-insensitive and metastability-hardened. this is often via defect-free cascadable asynchronous sequencers, and defect-free one-hot asynchronous programmable sequencers--their features, layout, and purposes. half II concludes with arbiter modules of varied varieties, people with and with out metastability safeguard, including purposes.
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Additional resources for Asynchronous Sequential Machine Design and Analysis: A Comprehensive Development of the Design and Analysis of Clock-Independent State Machines and Systems ... Lectures on Digital Circuits & Systems)
14: Summary of the excitation tables. (a) PS-to-NS transitions. (b) LPD model. (c) Comple mentary C-elements. (d) combined form for SR basic cells (e) Normal C-elements. 14(e) applies to a normal C-element. The reader will notice the similarity between entries for the complementary C-elements and those for the combined basic cells illustrated by loops. 6) gives not only the conversion logic between the LPD model and basic cells but also the conversion logic between the LPD model and complementary C-elements.
1: Endless cycles in asynchronous FSMs. (a) A seqment of a state diagram used as a model for endless cycle analysis. (b) Example of an endless cycle. (c) Elimination of the endless cycle in (b). there now results (A ⊕ B) ⋅ AB = 0, thereby eliminating the endless cycles. Endless cycles can occur in a variety of state configurations including those involving more than two states. 2 RACES AND CRITICAL RACES Any set of alternative paths from an origin state to a destination state, involving a change of two or more state variables, is called a race or race path.
6a. 6b. (b) Converted S,R EV K-maps showing optimum NS logic cover. don’t use it unless it is necessary to extract optimum or near optimum cover. 3. For comparison purposes, the optimum NS and output forming logic for the LPD and SR models are given in Eqs. 1b. An inspection of these equations indicates that the NS logic gate/input tally for the LPD model is 5/11 exclusive of inverters, whereas that for the nested element model yields a gate/input tally of 4/8 exclusive of inverters and C-elements.
Asynchronous Sequential Machine Design and Analysis: A Comprehensive Development of the Design and Analysis of Clock-Independent State Machines and Systems ... Lectures on Digital Circuits & Systems) by Richard F. Tinder