An Asynchronous Interface with Robust Control for Globally-Asynchronous Locally-Synchronous Systems

An Asynchronous Interface with Robust Control for Globally-Asynchronous Locally- Synchronous Systems

ABSTRACT: Contemporary digital systems must necessarily be based on the “System-on-Chip” (SoC) concept. Especially in relation to the aerospace industry, these systems must overcome some additional engineering challenges concerning reliability, safety and low power. An interesting style for aerospace SoC design is the GALS (Globally Asynchronous, Locally Synchronous) paradigm, which can be used...

Globally Asynchronous Locally Synchronous (GALS) Interface

Synchronous Design Flow for Globally Asynchronous Locally Synchronous Systems

– In this paper, we introduce an efficient design flow for Globally Asynchronous Locally Synchronous systems, which can be used by designers without prior knowledge of asynchronous circuits. The design flow starts with a high-level description model of the system in Simulink and ends with a hardware implementation in an FPGA or a standard-cell ASIC. We have developed a tool in MATLAB, so that t...

Self-Timed Ring for Globally-Asynchronous Locally-Synchronous Systems

The lack of proven mechanisms for transferring data between multiple synchronous islands has been a major impediment for applying globally asynchronous locally synchronous (GALS) techniques to SoC design. We have implemented on a VLSI test chip three alternative solutions to fill the gap: an arbitrated bus, a switch, and a self-timed ring. Circuit details and various extensions of the basic rin...

GRL: A Specification Language for Globally Asynchronous Locally Synchronous Systems

A GALS (Globally Asynchronous, Locally Synchronous) system consists of several synchronous subsystems that evolve concurrently and interact with each other asynchronously. Most formalisms and design tools support either the synchronous paradigm or the asynchronous paradigm but rarely combine both, which requires an intricate modeling of GALS systems. In this paper, we present a new language, ca...