An Adaptive Dictionary Encoding Scheme for SOC Data Buses

• Published in: Proceedings of the conference on Design, automation and test in Europe p. 1059
• Main Authors: Lv, T., Wolf, W., Henkel, J., Lekatsas, H.
• Format: Conference Proceeding
• Language: English
• Published: Washington, DC, USA IEEE Computer Society 04.03.2002
• Series: ACM Conferences
• ISBN: 0769514715; 9780769514710
• DOI: 10.5555/882452.874359

As bus lengths on multi-hundred-million transistor SOCs (Systems-On-a-Chip) grow and as inter-wire capacitances of sub-0.10u technologies increase, the resulting high switching capacitances of buses (and interconnects in general) have a non-negligible impact on the power consumption of a whole SOC.In this paper, we address this problem by intoducing our bus encoding technique 'ADES' that minimizes the power consumption of data buses through a dictionary-based encoding technique.We show that our technique saves between 18% and 40% of bus energy compared to the non-encoded cases using a large set of (freely-acesssible) real-world applications.Furthermore, we compare our technique to the best-known data bus encoding techniques to date and it exceeds all of them in energy savings for the same set of applications.The additional hardware effort for our bus en/decoder is thereby very small