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Issue No.12 - December (1982 vol.31)
pp: 1133-1141
L.A. Hollaar , Department of Computer Science, University of Utah.
The "one-hot" row assignment for asynchronous circuits, in which every row in a flow table has exactly one of the feedback variables that equals the value 1, provides a straightforward method for circuit synthesis. Once a flow table has been constructed, the state equations can be directly written, without requiring any procedure to ensure a race-free assignment. Furthermore, it can implement any arbitrary fundamental mode asynchronous circuit, not depending on a specific signaling protocol for its correct operation. An alternate view of one-hot asynchronous circuits is given, with a simple set-reset flip-flop for each state. Although this may seem excessive compared to implementations with encoded state variables, for many circuits their one-hot implementation is comparable in cost to other asynchronous implementations.
signaling protocols, Asynchronous control, direct mapping algorithms, nonfundamental mode operation, "one-hot" state assignment, parallel operations, sequencer logical design
L.A. Hollaar, "Direct Implementation of Asynchronous Control Units", IEEE Transactions on Computers, vol.31, no. 12, pp. 1133-1141, December 1982, doi:10.1109/TC.1982.1675937
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