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http://dx.doi.org/10.5573/ieie.2016.53.1.043

Power Optimization Method Using Peak Current Modeling for NAND Flash-based Storage Devices  

Won, Samkyu (Department of Electrical and Electronic Engineering, Yonsei University, SK - Hynix Semiconductor)
Chung, Eui-Young (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.1, 2016 , pp. 43-50 More about this Journal
Abstract
NAND flash based storage devices adopts multi-channel and multi-way architecture to improve performance using parallel operation of multiple NAND devices. However, multiple NAND devices consume higher current and peak power overlap problem influences on the system stability and data reliability. In this paper, current waveform is measured for erase, program and read operations, peak current and model is defined by profiling method, and estimated probability of peak current overlap among NAND devices. Also, system level TLM simulator is developed to analyze peak overlap phenomenon depending on various simulation scenario. In order to remove peak overlapping, token-ring based simple power management method is applied in the simulation experiments. The optimal peak overlap ratio is proposed to minimize performance degradation based on relationship between peak current overlapping and system performance.
Keywords
NAND Flash Memory; Peak current; Power consumption; Multi-Channel; Multi-way;
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