Power-aware FPGA technology mapping for programmable-VT architectures (abstract only)

  • Authors:
  • Wei Ting Loke;Yajun Ha

  • Affiliations:
  • Xilinx Asia Pacific Pte. Ltd. & National University of Singapore, Singapore, Singapore;National University of Singapore, Singapore, Singapore

  • Venue:
  • Proceedings of the ACM/SIGDA international symposium on Field Programmable Gate Arrays
  • Year:
  • 2012

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Abstract

In this paper, we present a framework for leakage power reduction in FPGAs with programmable-VT architectures, with focus on dual-VT technology mapping. The use of Reverse Back Bias (RBB) circuit techniques is recognized as one of the possible strategies in mitigating leakage power, a critical problem in circuits deploying deep submicron process technologies. FPGAs with the ability to tune LUT VT via RBB offer the potential of reducing leakage power with no sacrifice to circuit speed. Today, Altera's Stratix line of FPGAs oer some levels of VT programmability, but with optimizations limited to the post-P&R stage. We present a novel technology mapper (RBBMap), logic block packer (RBBPack) and placement-and-routing tool (RBBVPR) that together demonstrate the advantages in moving RBB optimizations upwards to the technology mapping level. Compared to an existing power-optimized technology mapping tool Emap, our framework oers an average of 44.41% savings in average logic block leakage power and 30.88% savings in average total energy consumption. We also illustrate why our work is potentially superior to another comparable work DVMap-2 that utilizes a dual-VDD approach.