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High-throughput asynchronous datapath with software-controlled voltage scaling

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3 Author(s)
Yee William Li ; Columbia Integrated Syst. Lab, Columbia Univ., New York, NY, USA ; G. Patounakis ; K. L. Shepard

It is widely recognized that adaptive control of the power supply is one of the most effective variables to achieve energy-efficient computation. In this work, we describe the development of a high-performance asynchronous micropipelined datapath that provides robust interfaces across voltage domains, performing appropriate voltage level conversions and operating between stages with fanout-of-four delays differing by almost two orders of magnitude. With software-specified throughput requirements, the power supply of the datapath is scaled from 2.5 V to 650 mV using an on-chip dc-dc conversion system that combines linear regulators and switched-capacitor power supplies. Because of the asynchronous design style, the processor operates continuously during the voltage scaling transitions.

Published in:

VLSI Circuits, 2003. Digest of Technical Papers. 2003 Symposium on

Date of Conference:

12-14 June 2003