Synthesis of asynchronous QDI FSM based on optimized sequencers

K. Alsayeg (1) , Laurent Fesquet (1) , G. Sicard (1) , D. Rios (1) , Marc Renaudin (1)

1 TIMA - Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés

This paper investigates a new method to synthesize asynchronous QDI FSM. QDI logic circuits are now recognized to be very robust circuits which have interesting properties to deal with nanometric technologies. This study presents a quick overview of the techniques used to implement QDI controllers. The asynchronous FSM synthesis from a HDL is studied and compared to a new method which is basically a direct mapping of the FSM graph. This can be done with sequencers which are small circuits able to manage a short signal sequence. The study demonstrates that, with optimized sequencers, it is possible to get faster and less power consuming FSM circuits. The method is illustrated by a simple example which has been designed in a 130 nm CMOS process.

Mots clés: FSM; asynchronous; QDI

Domaines: Micro et nanotechnologies/Microélectronique

K. Alsayeg, Laurent Fesquet, G. Sicard, D. Rios, Marc Renaudin. Synthesis of asynchronous QDI FSM based on optimized sequencers. 34th European Conference on Solid-States Circuits (ESSCIRC'08), ESS Fringe Poster Session, Sep 2008, Edinburgh, United Kingdom. ⟨hal-00354513⟩