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Block placement to ensure channel routability
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Source Great Lakes Symposium on VLSI archive
Proceedings of the 17th ACM Great Lakes symposium on VLSI table of contents
Stresa-Lago Maggiore, Italy
POSTER SESSION: Poster session 2 table of contents
Pages: 465 - 468  
Year of Publication: 2007
ISBN:978-1-59593-605-9
Authors
Shigetoshi Nakatake  University of Kitakyushu, Kitakyushu, Japan
Zohreh Karimi  University of California: Los Angeles, Los Angeles, CA
Taraneh Taghavi  University of California: Los Angeles, Los Angeles, CA
Majid Sarrafzadeh  University of California: Los Angeles, Los Angeles, CA
Sponsors
SIGDA: ACM Special Interest Group on Design Automation
ACM: Association for Computing Machinery
Publisher
ACM  New York, NY, USA
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ABSTRACT

Given a set of placed blocks, we present an algorithm that minimally spaces the blocks to ensure routability under several assumptions. By performing a binary search on total width/height of the chip and optimal routing area can be obtained. The proposed technique utilizes a piecewise linear model of the channel width. Based on this model, we introduce LP formulation to determine the optimal channel width considering pin alignment by balancing the wire length and the channel width.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

 
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Y. Kajitani, Order of Channel for Safe Routing and Optimal Compaction of Routing Area, IEEE Trans. on CAD, Vol.2, No.4, pp.293--300, 1983.
 
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Yang Cai and D. F. Wong, Channel/Switchbox Definition for VLSI Building-Block Layout, IEEE Trans. on CAD, Vol.10, No.12, pp.1485--1493, 1991.
 
5
Jin-Tai Yan, Routing Space Estimation and Safe Assignment for Macro Cell Placement Proc. of ASPDAC 1995, pp.851--856, 1995.
 
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H. Murata, S. Nakatake, K. Fujiyoshi, and Y. Kajitani, VLSI module placement based on rectangle-packing by Sequence-Pair, IEEE Trans. on CAD, Vol.15, No.12, pp.1518--1524, 1996.
 
8
Jun Dong Cho, Wire Space and Length Estimation in Two-Dimensional Arrays, IEEE Trans. on CAD, Vol.19, No.5, pp.612--615, 2000.
 
9
Yiaoyu Song, Qian-Yu Tang, Dian Zhou, and Yuke Wang, Wire Space Estimation and Routability Analysis, IEEE Trans. on CAD, Vol.19, No.5, pp.624--628, 2000.

Collaborative Colleagues:
Shigetoshi Nakatake: colleagues
Zohreh Karimi: colleagues
Taraneh Taghavi: colleagues
Majid Sarrafzadeh: colleagues