Asynchronous System Design   3-0-0-3


  • This subject introduces the fundamentals and performance of Asynchronous system
  • To familiarize the dependency graphical analysis of signal transmission graphs
  • To learn software languages and its syntax and operations for implementing Asynchronous Designs



Fundamentals: Handshake protocols, Muller C-element, Muller pipeline, Circuit implementation styles, theory. Static data-flow structures: Pipelines and rings, Building blocks, examples

Performance: A quantitative view of performance, quantifying performance, Dependency graphic analysis. Handshake circuit implementation: Fork, join, and merge, Functional blocks, mutual exclusion, arbitration and metastability.

Speed-independent control circuits: Signal Transition graphs, Basic Synthesis Procedure, Implementation using state-holding gates, Summary of the synthesis Process, Design examples using Petrify. Advanced 4- phase bundled data protocols and circuits: Channels and protocols, Static type checking, More advanced latch control circuits.

High-level languages and tools: Concurrency and message passing in CSP, Tangram program examples, Tangram syntax-directed compilation, Martin’s translation process, Using VHDL for Asynchronous Design. An Introduction to Balsa: Basic concepts, Tool set and design flow, Ancillary Balsa Tools

The Balsa language: Data types, Control flow and commands, Binary/Unary operators, Program structure. Building library Components: Parameterized descriptions, Recursive definitions. A simple DMA controller: Global Registers, Channel Registers, DMA control structure, The Balsa description.


Text Books

1.   Asynchronous Circuit Design- Chris. J. Myers, John Wiley & Sons,2001.

2.   Handshake Circuits An Asynchronous architecture for VLSI programming –   Kees Van Berkel Cambridge University Press, 2004


Reference Books

1.   Principles of Asynchronous Circuit Design-Jens Sparso, Steve Furber, Kluver Academic Publishers, 2001.

2.   Asynchronous Sequential Machine Design and Analysis, Richard F. Tinder, 2009

3.   A Designer's Guide to Asynchronous VLSI, Peter A. Beerel, Recep O. Ozdag, Marcos Ferretti, 2010



Students are able to

CO1: understand the fundamentals of Asynchronous protocols

CO2: analyse the performance of Asynchronous System and implement handshake circuits

CO3: understand the various control circuits and Asynchronous system modules

CO4: gain the experience in using high level languages and tools for Asynchronous Design

        CO5: learn commands and control flow of Balsa language for implementing Asynchronous Designs