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Power Optimization Method Using Peak Current Modeling for NAND Flash-based Storage Devices
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 Title & Authors
Power Optimization Method Using Peak Current Modeling for NAND Flash-based Storage Devices
Won, Samkyu; Chung, Eui-Young;
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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.
NAND Flash Memory;Peak current;Power consumption;Multi-Channel;Multi-way;
 Cited by
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