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Author Plana, Luis A ♦ Clark, David ♦ Davidson, Simon ♦ Furber, Steve ♦ Garside, Jim ♦ Painkras, Eustace ♦ Pepper, Jeffrey ♦ Temple, Steve ♦ Bainbridge, John
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©2011
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Asynchronous system ♦ Computer-aided design ♦ Globally-asynchronous locally-synchronous system ♦ Intellectual property ♦ Network-on-chip
Abstract The design and implementation of globally asynchronous locally synchronous systems-on-chip is a challenging activity. The large size and complexity of the systems require the use of computer-aided design (CAD) tools but, unfortunately, most tools do not work adequately with asynchronous circuits. This article describes the successful design and implementation of SpiNNaker, a GALS multicore system-on-chip. The process was completed using commercial CAD tools from synthesis to layout. A hierarchical methodology was devised to deal with the asynchronous sections of the system, encapsulating and validating timing assumptions at each level. The crossbar topology combined with a pipelined asynchronous fabric implementation allows the on-chip network to meet the stringent requirements of the system. The implementation methodology constrains the design in a way that allows the tools to complete their tasks successfully. A first test chip, with reduced resources and complexity was taped-out using the proposed methodology. Test chips were received in December 2009 and were fully functional. The methodology had to be modified to cope with the increased complexity of the SpiNNaker SoC. SpiNNaker chips were delivered in May 2011 and were also fully operational, and the interconnect requirements were met.
ISSN 15504832
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-12-01
Publisher Place New York
e-ISSN 15504840
Journal ACM Journal on Emerging Technologies in Computing Systems (JETC)
Volume Number 7
Issue Number 4
Page Count 18
Starting Page 1
Ending Page 18


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Source: ACM Digital Library