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Paper Abstract and Keywords
Presentation 2014-04-17 15:15
[Invited Lecture] Fabrication of a 99%-Energy-Less Nonvolatile Multi-Functional CAM Chip Using Hierarchical Power Gating for a Massively-Parallel Full-Text-Search Engine
Shoun Matsunaga (Tohoku Univ.), Noboru Sakimura, Ryusuke Nebashi, Tadahiko Sugibayashi (NEC), Masanori Natsui, Akira Mochizuki, Tetsuo Endoh, Hideo Ohno, Takahiro Hanyu (Tohoku Univ.) ICD2014-8 Link to ES Tech. Rep. Archives: ICD2014-8
Abstract (in Japanese) (See Japanese page) 
(in English) We demonstrate a 1-Mb nonvolatile TCAM-based search engine using 90-nm CMOS and perpendicular MTJ technologies for an ultra low-energy full-text search system. We newly developed a nonvolatile TCAM cell circuit for text-search use. Extending the assignments of a 2-bit storage-data pattern and a 2-bit input-data pattern enables a fine-grained power gating scheme to work in the nonvolatile TCAM word circuits with eliminating the wasted text-search operations. Use of the developed nonvolatile TCAM-based search engine makes it possible to significantly reduce power consumption not only in the search mode but also in the standby/sleep mode by a hierarchical power gating, while having high-speed search operation due to the parallel processing capability. As a result, the energy consumption for full-text search can be reduced to about 1/100 compared to the serial search performed on a conventional search-sever system.
Keyword (in Japanese) (See Japanese page) 
(in English) Full text search / TCAM / power gating / nonvolatile / MTJ device / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 13, ICD2014-8, pp. 39-44, April 2014.
Paper # ICD2014-8 
Date of Issue 2014-04-10 (ICD) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ICD2014-8 Link to ES Tech. Rep. Archives: ICD2014-8

Conference Information
Committee ICD  
Conference Date 2014-04-17 - 2014-04-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Memory Device Technologies 
Paper Information
Registration To ICD 
Conference Code 2014-04-ICD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fabrication of a 99%-Energy-Less Nonvolatile Multi-Functional CAM Chip Using Hierarchical Power Gating for a Massively-Parallel Full-Text-Search Engine 
Sub Title (in English)  
Keyword(1) Full text search  
Keyword(2) TCAM  
Keyword(3) power gating  
Keyword(4) nonvolatile  
Keyword(5) MTJ device  
1st Author's Name Shoun Matsunaga  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Noboru Sakimura  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Ryusuke Nebashi  
3rd Author's Affiliation NEC Corporation (NEC)
4th Author's Name Tadahiko Sugibayashi  
4th Author's Affiliation NEC Corporation (NEC)
5th Author's Name Masanori Natsui  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Akira Mochizuki  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
7th Author's Name Tetsuo Endoh  
7th Author's Affiliation Tohoku University (Tohoku Univ.)
8th Author's Name Hideo Ohno  
8th Author's Affiliation Tohoku University (Tohoku Univ.)
9th Author's Name Takahiro Hanyu  
9th Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2014-04-17 15:15:00 
Presentation Time 25 
Registration for ICD 
Paper # IEICE-ICD2014-8 
Volume (vol) IEICE-114 
Number (no) no.13 
Page pp.39-44 
#Pages IEICE-6 
Date of Issue IEICE-ICD-2014-04-10 

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