DocumentCode :
1477058
Title :
An activity-driven encoding scheme for power optimization in microprogrammed control unit
Author :
Wang, Chuan-Yu ; Roy, Kaushik
Author_Institution :
Synopsys Inc., Mountain View, CA, USA
Volume :
7
Issue :
1
fYear :
1999
fDate :
3/1/1999 12:00:00 AM
Firstpage :
130
Lastpage :
134
Abstract :
With the high demand for reliability and further integration, power consumption has become a critical concern in today´s very large scale integration design. Considering the different techniques to minimize power consumption and promote system´s reliability, reducing switching activity of CMOS circuits is a promising area to be explored. In this paper, we present a encoding scheme to refine the control memory in a microprogrammed control unit, which can reduce switching activities within the control unit and on the path from control unit to data-processing unit. To achieve this, pseudo-Boolean programming techniques have been introduced to efficiently encode don´t care bits in the control memory. Experiments have been conducted with a subset of 8086 instruction set. Results show that, 4.8%-16.5% reduction of switching activities can be obtained from the proposed encoding scheme.
Keywords :
CMOS digital integrated circuits; VLSI; circuit optimisation; encoding; integrated circuit design; low-power electronics; microcontrollers; microprogramming; programmable circuits; 8086 instruction set; CMOS circuit; VLSI design; control memory; data processing unit; encoding; microprogrammed control unit; power consumption; power optimization; pseudo-Boolean programming; reliability; switching activity; CMOS logic circuits; Capacitance; Computer architecture; Encoding; Energy consumption; Integrated circuit reliability; Logic gates; Power system reliability; Switching circuits; Very large scale integration;
fLanguage :
English
Journal_Title :
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1063-8210
Type :
jour
DOI :
10.1109/92.748210
Filename :
748210
Link To Document :
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