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Exploiting level sensitive latches in wire pipelining

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3 Author(s)
Seth, V. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Min Zhao ; Jiang Hu

Wire pipelining emerges as a new necessity for global wires due to increasing wire delay, shrinking clock period and growing chip size. Existing approaches on wire pipelining are mostly based on edge triggered flip-flops. In this paper, we demonstrate the advantages of using level sensitive latches in terms of both latency and area cost. The input-output timing coupling and the strict short path constraint for latches demand additional design elaborations compared with flip-flops. New approaches are proposed in this work to solve these difficulties so that the advantages of latches can be fully utilized. In particular, a deferred delay padding technique is developed to correct short path violations with the minimal extra cost. These techniques are integrated with a dynamic programming based concurrent synchronous element and repeater insertion framework. Experimental results confirm the advantages of using latches as well as effectiveness of our algorithms.

Published in:

Computer Aided Design, 2004. ICCAD-2004. IEEE/ACM International Conference on

Date of Conference:

7-11 Nov. 2004

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