Synthesis of Extended Burst-Mode Asynchronous Controllers by the Use of Optimized Direct Mapping

This paper proposes a new approach for the synthesis, by the use of direct mapping process, of extended burst-mode asynchronous finite state machines (XBM_AFSM). The great advantage of the synthesis by direct mapping is the achieved simplicity in methodology, not demanding any knowledge about asynchronous logic concepts, hazard-free circuits and critical race theory. The previous proposed methods for the synthesis of XBM_AFSMs by direct mapping did not show any optimization possibilities, therefore presenting a high number of memory elements. This paper proposes an algorithm to optimize the XBM specification, which results in a reduction of memory elements of a circuit, when synthesized by direct mapping. Starting from a well-known extended burst-mode (XBM) specification, the direct mapping allows implementing large specifications with just little computational effort. When compared with the conventional approach, the optimization of XBM specification allows a reduction of memory elements in the final circuit of 29% for a set of analyzed benchmarks.