发明授权
US08200891B2 Memory controller, memory system with memory controller, and method of controlling flash memory
有权
存储器控制器，带存储器控制器的存储器系统以及控制闪速存储器的方法
- 专利标题： Memory controller, memory system with memory controller, and method of controlling flash memory
- 专利标题（中）： 存储器控制器，带存储器控制器的存储器系统以及控制闪速存储器的方法
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申请号： US12701789申请日： 2010-02-08
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公开(公告)号： US08200891B2公开(公告)日： 2012-06-12
- 发明人: Naoki Mukaida , Takeshi Kamono
- 申请人： Naoki Mukaida , Takeshi Kamono
- 申请人地址： JP Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Posz Law Group, PLC
- 优先权： JP2009-027740 20090209
- 主分类号： G06F12/10
- IPC分类号： G06F12/10
摘要：
In the control of the number of program-erase cycles, physical blocks (PBs) are divided into plural groups on a basis of the number of program-erase cycles and a search for a free PB is performed in the groups when assigning a logical block (LB) to the free PB. In the search, a free PB among a group covering a small number of program-erase cycles precedes that among a group covering a large number of program-erase cycles. Further, when searching out a free PB in the search, data stored in a PB (source PB) included in a group covering a smaller number of program-erase cycles than that covered by a group including the free PB searched out are transferred to the free PB if there is the source PB. The source PB is a PB to which a LB is assigned earliest among a group including it.
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