Asynchronous data communication with low power for GALS systems

In this paper, we propose an asynchronous wrapper with new handshake circuits and low swing bus drivers for data communication in GALS (globally-asynchronous locally-synchronous) systems with low power. The handshake circuits include two data-ports and a local clock controller. We present two approaches for the implementation of data-ports; one with pure standard cells and the other with Muller C elements. The detailed design methodology is given and the circuits are validated with VHDL and circuits simulation in standard CMOS technology.