DocumentCode :
1374250
Title :
Architectures and synthesis algorithms for power-efficient bus interfaces
Author :
Benini, Luca ; Macii, Alberto ; Poncino, Massimo ; Scarsi, R.
Author_Institution :
Bologna Univ., Italy
Volume :
19
Issue :
9
fYear :
2000
fDate :
9/1/2000 12:00:00 AM
Firstpage :
969
Lastpage :
980
Abstract :
In this paper we present algorithms for the synthesis of encoding and decoding interface logic that minimizes the average number of transitions on heavily-loaded global bus lines at no cost in communication throughput (i.e., one word is transmitted at each cycle). The distinguishing feature of our approach is that it does not rely on designer´s intuition, but it automatically constructs low-transition activity codes and hardware implementation of encoders and decoders, given information on word-level statistics. We propose an accurate method that is applicable to low-width buses, as well as approximate methods that scale well with bus width. Furthermore, we introduce an adaptive architecture that automatically adjusts encoding to reduce transition activity on buses whose word-level statistics are not known a priori. Experimental results demonstrate that our approaches out-perform specialized low-power encoding schemes presented in the past
Keywords :
VLSI; circuit CAD; integrated circuit design; integrated circuit interconnections; low-power electronics; minimisation of switching nets; redundancy; adaptive architecture; approximate methods; bus width; communication throughput; decoding interface logic; encoding interface logic; hardware implementation; heavily-loaded global bus lines; low-power electronics; low-transition activity codes; low-width buses; power-efficient bus interfaces; word-level statistics; Capacitance; Circuits; Costs; Decoding; Digital systems; Encoding; Hardware; Logic; Statistics; Throughput;
fLanguage :
English
Journal_Title :
Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0070
Type :
jour
DOI :
10.1109/43.863637
Filename :
863637
Link To Document :
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