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1. 发明申请

WO2007076492A3 METHODS AND SYSTEMS FOR WRITING NON-VOLATILE MEMORIES FOR INCREASED ENDURANCE 审中-公开
标题翻译：用于增加耐力的非易失性记忆的方法和系统
公开(公告)号：WO2007076492A3
公开(公告)日：2007-11-29
申请号：PCT/US2006062579
申请日：2006-12-22
申请人： SANDISK CORP , PINTO YOSI , GONGWER GEOFFREY S , HONEN OREN
发明人： PINTO YOSI , GONGWER GEOFFREY S , HONEN OREN
IPC分类号： G11C16/34 , H03K21/40
CPC分类号： G11C16/349 , G11C16/3495 , H03K21/403
摘要： A memory system that incorporates methods of amplifying the lifetime of a counter made up of memory elements, such as EEPROM cells, having finite endurance. A relatively small memory made up of a number of individually accessible write segments, where, depending on the embodiment, each write segment is made up of a single memory cell or a small number of cells (e.g., a byte). A count is encoded so that it is distributed across a number of fields, each associated with one of the write segments, such that as the count is incremented only a single field (or, in the single bit embodiments, occasionally more than one field) is changed and that these changes are evenly distributed across the fields. The changed field is then written to the corresponding segment, while the other write segments are unchanged. Consequently, the number of rewrites to a given write segment is decreased, and the lifetime correspondingly increased, by a factor corresponding to the number of write segments used.
摘要翻译：一种内存系统，结合了放大由有限寿命的存储器元件组成的计数器的寿命的方法，例如EEPROM单元。由许多单独可访问的写段组成的相对较小的存储器，其中取决于实施例，每个写段由单个存储器单元或少量单元（例如，字节）组成。计数被编码以便它分布在多个字段中，每个字段与其中一个写入段相关联，使得随着计数仅递增一个字段（或者在单个位实施例中，偶尔多于一个字段）已更改，并且这些更改均匀分布在各个字段中。然后将更改的字段写入相应的段，而其他写段不变。因此，对给定写段的重写次数减少了，并且寿命相应地增加了与所使用的写段数对应的因子。

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