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- Title
- GLOBALLY-ASYNCHRONOUS, LOCALLY-SYNCHRONOUS WRAPPER CONFIGURATIONS FOR POINT-TO-POINT AND MULTI-POINT DATA COMMUNICATION.
- Creator
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Ravi, Akarsh, Yuan, Jiann, University of Central Florida
- Abstract / Description
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Globally-Asynchronous, Locally-Synchronous (GALS) design techniques employ the finer points of synchronous and asynchronous design methods to eliminate problems arising due to clock distribution, power dissipation, and large area over head. With the recent rise in the demand for System-on-a-Chip (SoC) designs, global clock distribution and power dissipation due to clock distribution are inevitable. In order to reduce/eliminate the effects of the global clock in synchronous designs and large...
Show moreGlobally-Asynchronous, Locally-Synchronous (GALS) design techniques employ the finer points of synchronous and asynchronous design methods to eliminate problems arising due to clock distribution, power dissipation, and large area over head. With the recent rise in the demand for System-on-a-Chip (SoC) designs, global clock distribution and power dissipation due to clock distribution are inevitable. In order to reduce/eliminate the effects of the global clock in synchronous designs and large area overhead in asynchronous designs, an alternative approach would be to utilize GALS design techniques. Not only do GALS designs eliminate the issue of using a global clock, they also have smaller area overhead when compared to purely asynchronous designs. Among the various GALS design approaches proposed till date, this thesis focuses on the working and implementation of Asynchronous Wrapper designs proposed by Muttersbach et al., in [1, 2]. This thesis specifically addresses different approaches to incorporate the wrappers in VLSI circuits, rather than discussing the efficiency and viability of GALS design techniques over purely synchronous or asynchronous approaches. It has been proven by researchers [3] that GALS design approaches bring down power consumption due to the elimination of the global clock by small amounts, but there is also a drop in performance. Since the goal of this thesis is to introduce the reader to GALS design techniques and not prove their efficiency, it is out of the scope of this thesis to validate the results shown in [3]. In our aim to introduce the reader to GALS design techniques, we first provide a comparison of synchronous and asynchronous design approaches, and then discuss the need for GALS design approaches. We will then address issues affecting GALS such as metastability, latency, flow control, and local clock alteration. After familiarizing the reader with the issues affecting GALS, we will then discuss various GALS design techniques proposed till date. We show the use of asynchronous FIFOs and asynchronous wrappers to realize GALS modules. Two wrapper design approaches are discussed: one being the asynchronous wrapper design proposed by Carlsson et al., in [4], and the other being the asynchronous wrapper design proposed in [1, 2]. An in-depth discussion and analysis of the wrapper design approach proposed in [1, 2] is provided based on the state transition graphs (STGs) that characterize the port-controller AFSMs. Various data transfer channel configurations that incorporate the wrapper port-controllers are designed and realized through VHDL codes, with their functioning verified through simulation results. Design examples showing the working of asynchronous wrappers to achieve point-to-point, synchronous-synchronous and synchronous-asynchronous data communication are provided. Finally, a design example to achieve multi-point data communication is realized. This example incorporates a previously proposed idea. We provide a modification to this idea by designing an arbiter that arbitrates between two separate requests coming into a multi-input port. Through the above design examples, the functionality and working of GALS asynchronous wrappers are verified, and recommendations for modifications are made to achieve flexible multi-point data communication.
Show less - Date Issued
- 2004
- Identifier
- CFE0000238, ucf:46245
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000238
- Title
- The Collector as Arbiter of Art: A Phenomenological Investigation of Collectors' Critical Judgment Development and Their Understanding of Art Toward a Theoretical Model for Appreciation and Criticism in Art Education.
- Creator
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Grey, Anne, Brewer, Thomas, Sivo, Stephen, Kaplan, Jeffrey, Price, Mark, Roberts, Sherron, University of Central Florida
- Abstract / Description
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The purpose of this study was to investigate art collectors' specific method of developing and making critical judgments in the context of their understanding of art. Phenomenological research methods were employed to obtain data through interviews with collectors of Contemporary African American art, Latin American art, and Minimalist and Conceptual art. Based on the findings, collectors' approaches to critical judgment can be categorized into three areas. First, critical skills are both...
Show moreThe purpose of this study was to investigate art collectors' specific method of developing and making critical judgments in the context of their understanding of art. Phenomenological research methods were employed to obtain data through interviews with collectors of Contemporary African American art, Latin American art, and Minimalist and Conceptual art. Based on the findings, collectors' approaches to critical judgment can be categorized into three areas. First, critical skills are both intuitive and developed over time, through a holistic and aesthetic process set in the art world. Collectors' edification requires commitment, and intense looking enabling them to see how works of art communicate. Second, key events that marked collectors' methodological approaches were connections with artists and art, notable purchases, and exhibitions of their collection. These events resulted from an integration of the collectors' identification with the art work, manifested over time in various forms. Finally, those objects that best reflected collectors' specific development of critical judgment and understanding of art were noted either by specific artists in their collection or the collection as a whole, functioning as vital aspects of the collectors' life and at the same time contributing to culture and society in its capacity to cause conversations. There is an opportunity to apply the information from collectors' processes as an educational model for teaching and learning about appreciation and criticism in art education by thinking about art collections more broadly, as another way to look at life and the art in life.
Show less - Date Issued
- 2011
- Identifier
- CFE0004115, ucf:49103
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004115
