Reset elimination and dispersion encoding for alleviating write disturbance of phase-change memory = 상 변화 메모리의 쓰기 간섭을 완화시키기 위한 Reset 제거 및 분산 인코딩

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Phase-change memory (PCM) is an emerging mechanism to resolve the scalability problems of dynamic random access memory (DRAM). However, with its scaling down below 20nm, PCM suffers from a write-disturbance (WD) problem in which cells lose their ‘0 (ReSET)’ state. WD occurs with the high thermal disturbance of the ReSET current when a cell changes from ‘1 (SET)’ to ‘0 (ReSET)’ and an adjacent cell is in ‘0 (ReSET)’ state. Therefore, reducing the contiguous ‘0 (ReSET)’ pattern can alleviate WD. We propose ReSET elimination and dispersion (RED) encoding for alleviating the WD in PCM. RED alleviates WD by reducing WD patterns regardless of direction, and minimizes error-correcting costs. RED reduces WD patterns by increasing the number of ‘1 (SET)’ utilizing data locality in the memory line. Additionally, RED scatters the consecutive zeros through a new data mapping policy. Our experimental results demonstrate that RED reduces the bit overhead for error correction from 21.2% to 9% by reducing WD up to 55.5% more than prior work on average.
Advisors
Kim, Lee-Supresearcher김이섭researcher
Description
한국과학기술원 :전기및전자공학부,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학부, 2018.2,[iv, 37 p. :]

Keywords

Phase change memory (PCM)▼awrite disturbance▼areliability▼adata locality▼adata encoding; 상 변화 메모리▼a쓰기 간섭▼a신뢰성▼a데이터 지역성▼a데이터 인코딩

URI
http://hdl.handle.net/10203/266725
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734044&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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