Energy Minimum Operation with Self Synchronous Gate-Level Autonomous Power Gating and Voltage Scaling

Benjamin DEVLIN  Makoto IKEDA  Kunihiro ASADA  

IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.4   pp.546-554
Publication Date: 2012/04/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.546
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Solid-State Circuit Design – Architecture, Circuit, Device and Design Methodology)
power gating,  gate-level,  pipeline,  self synchronous,  energy minimum operation,  FPGA,  

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A 65 nm self synchronous field programmable gate array (SSFPGA) which uses autonomous gate-level power gating with minimal control circuitry overhead for energy minimum operation is presented. The use of self synchronous signaling allows the FPGA to operate at voltages down to 370 mV without any parameter tuning. We show both 2.6x total energy reduction and 6.4x performance improvement at the same time for energy minimum operation compared to the non-power gated SSFPGA, and compared to the latest research 1.8x improvement in power-delay product (PDP) and 2x performance improvement. When compared to a synchronous FPGA in a similar process we are able to show up to 84.6x PDP improvement. We also show energy minimum operation for maximum throughput on the power gated SSFPGA is achieved at 0.6 V, 27 fJ/operation at 264 MHz.