Voltage-island driven floorplanning considering level-shifter positions

Bei Yu; Sheqin Dong; Satoshi Goto; Song Chen

doi:10.1145/1531542.1531558

Voltage-island driven floorplanning considering level-shifter positions

Bei Yu, Sheqin Dong, Satoshi Goto, Song Chen

Waseda University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Citations (Scopus)

Abstract

Power optimization has become a significant issue when the CMOS technology entered the nanometer era. Multiple-Supply Voltage (MSV) is a popular and effective method for power reduction. Level shifters may cause area and Interconnect Length Overhead(ILO), and should be considered during floorplanning and post-floorplanning stages. In this paper, we propose a two phases framework VLSAF to solve voltage and level shifter assignment problem. At floorplanning phase, we use: a convex cost network flow algorithm to assign voltage; a minimum cost flow algorithm to assign level shifter. At post-floorplanning phase, a heuristic method is adopted to redistribute white spaces and calculate the positions and shapes of level shifters. Experimental results show VLSAF is effective.

Original language	English
Title of host publication	Proceedings of the ACM Great Lakes Symposium on VLSI, GLSVLSI
Pages	51-56
Number of pages	6
DOIs	https://doi.org/10.1145/1531542.1531558
Publication status	Published - 2009
Event	19th ACM Great Lakes Symposium on VLSI, GLSVLSI '09 - Boston, MA Duration: 2009 May 10 → 2009 May 12

Other

Other	19th ACM Great Lakes Symposium on VLSI, GLSVLSI '09
City	Boston, MA
Period	09/5/10 → 09/5/12

Keywords

Convex Network Flow
Level Shifter Assignment
Voltage Assignment
Voltage-Island
White Space Redistribution

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1145/1531542.1531558

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Cite this

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title = "Voltage-island driven floorplanning considering level-shifter positions",

abstract = "Power optimization has become a significant issue when the CMOS technology entered the nanometer era. Multiple-Supply Voltage (MSV) is a popular and effective method for power reduction. Level shifters may cause area and Interconnect Length Overhead(ILO), and should be considered during floorplanning and post-floorplanning stages. In this paper, we propose a two phases framework VLSAF to solve voltage and level shifter assignment problem. At floorplanning phase, we use: a convex cost network flow algorithm to assign voltage; a minimum cost flow algorithm to assign level shifter. At post-floorplanning phase, a heuristic method is adopted to redistribute white spaces and calculate the positions and shapes of level shifters. Experimental results show VLSAF is effective.",

keywords = "Convex Network Flow, Level Shifter Assignment, Voltage Assignment, Voltage-Island, White Space Redistribution",

author = "Bei Yu and Sheqin Dong and Satoshi Goto and Song Chen",

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note = "19th ACM Great Lakes Symposium on VLSI, GLSVLSI '09 ; Conference date: 10-05-2009 Through 12-05-2009",

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AU - Yu, Bei

AU - Dong, Sheqin

AU - Goto, Satoshi

AU - Chen, Song

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N2 - Power optimization has become a significant issue when the CMOS technology entered the nanometer era. Multiple-Supply Voltage (MSV) is a popular and effective method for power reduction. Level shifters may cause area and Interconnect Length Overhead(ILO), and should be considered during floorplanning and post-floorplanning stages. In this paper, we propose a two phases framework VLSAF to solve voltage and level shifter assignment problem. At floorplanning phase, we use: a convex cost network flow algorithm to assign voltage; a minimum cost flow algorithm to assign level shifter. At post-floorplanning phase, a heuristic method is adopted to redistribute white spaces and calculate the positions and shapes of level shifters. Experimental results show VLSAF is effective.

AB - Power optimization has become a significant issue when the CMOS technology entered the nanometer era. Multiple-Supply Voltage (MSV) is a popular and effective method for power reduction. Level shifters may cause area and Interconnect Length Overhead(ILO), and should be considered during floorplanning and post-floorplanning stages. In this paper, we propose a two phases framework VLSAF to solve voltage and level shifter assignment problem. At floorplanning phase, we use: a convex cost network flow algorithm to assign voltage; a minimum cost flow algorithm to assign level shifter. At post-floorplanning phase, a heuristic method is adopted to redistribute white spaces and calculate the positions and shapes of level shifters. Experimental results show VLSAF is effective.

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KW - Level Shifter Assignment

KW - Voltage Assignment

KW - Voltage-Island

KW - White Space Redistribution

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