An Asynchronous Interface with Robust Control for Globally-Asynchronous Locally- Synchronous Systems
نویسندگان
چکیده
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 for Very Large Scale Integration – Deep-Sub-Micron (VLSI_DSM) design. Currently, the major drawback in the design of a GALS system is the asynchronous interface (asynchronous wrapper – AW) when being implemented in VLSI_DSM. There is a typical AW design style based on asynchronous controllers that provides communication between modules (called ports), but the port controllers are generally subjected to essential hazard, what decreases the reliability and safety of the full system. Concerning to this main drawback, this paper proposes an AW with robust port controller that shows to be free of essential hazard, besides allowing full autonomy for the locally synchronous modules, creating fault tolerant systems as much as possible. It follows the Delay Insensitive (DI) model interacting with the environment in the Generalized Fundamental Mode (GFM) without the need to insert any delay elements. Additional delay elements, although proposed by some previous work found in literature, are not desirable in aerospace applications. The proposed interface allows working on Ib/Ob mode, showing the DI model is more robust than the QDI model and, therefore, it does not need to meet isochronic fork requirements nor timing analysis. Once an interface presenting similar properties was not found in literature, the proposed architecture proved to have great potential of implementation in practical VLSI_DSM designs, including the aerospace ones, once it overcomes the main engineering challenges of this kind of industry.
منابع مشابه
A Design Path for Design of GALS Based Communication Systems
The GALS (Globally Asynchronous Locally Synchronous) approach is highly suitable for implementation of communication systems. In this paper we describe an efficient design flow for GALS design based on commercial tools. As design example we have selected a digital FIR filter. It is a nontrivial task to develop an efficient design flow for GALS based systems because of the asynchronous parts. Bo...
متن کاملSynchronous 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...
متن کاملAsynchronous Layered Interface of Multimedia SoCs for Multiple Outstanding Transactions
In this paper, a novel asynchronous layered interface for a high performance on-chip bus is designed in a Globally Asynchronous Locally Synchronous (GALS) style. The proposed asynchronous layered interface with distributed and modularized control units supports multiple outstanding in-order/out-of-order transactions to achieve high performance. In the layered architecture, extension of an async...
متن کاملFormal Specification of an Asynchronous On-Chip Bus
The latest improvements in the technology of digital devices allow designers to build whole systems on a single silicon chip. New problems arise in this context, one of them being the complexity of interconnections. Optimizing interfaces has become a tedious design step. Another issue is the power consumption, for which globally asynchronous locally synchronous approaches provide to be a good s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013