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1. 发明申请

WO2014092966A1 SYSTEM AND METHOD TO UPDATE READ VOLTAGES IN A NON-VOLATILE MEMORY IN RESPONSE TO TRACKING DATA 审中-公开
标题翻译：用于更新在非易失性存储器中读取电压以响应跟踪数据的系统和方法
公开(公告)号：WO2014092966A1
公开(公告)日：2014-06-19
申请号：PCT/US2013/071272
申请日：2013-11-21
申请人： SANDISK TECHNOLOGIES INC.
发明人： YANG, Nian Niles , TAKAFUJI, Ryan , JEON, Seungjune , AVILA, Chris , SPROUSE, Steven
IPC分类号： G11C29/02
CPC分类号： G06F12/0246 , G11C16/00 , G11C29/021 , G11C29/028
摘要： A storage device includes a read voltage engine (114) which is located either in a controller (112) or in a memory (104). Due to various effects such as data retention, read disturb, and/or program disturb, threshold voltages of data storage elements may shift, producing errors when read using the original set of read voltages. The read voltage engine (114) adjusts a read voltage to be used by the controller (112) to read data from the non-volatile memory (104). During operation, when data is to be read from the memory (104), such as when a request is received from the host device (116), the controller (112) may be configured to read a representation (122) of the tracking data (109) from at least a portion of the memory (104), such as the first portion (108). Over time the stored tracking data (109) may be susceptible to errors, resulting in the representation (122) of the tracking data (109) that may include one or more errors. The controller (112) may further compare a count of bits in the representation (122) of the tracking data (109) corresponding to storage elements in one or more states read from the memory (104) to a corresponding count of bits in the tracking data (109) and the read voltage engine (114) may be configured to adjust a read voltage to be used by the controller (112) to read data from the memory (104) based on the comparison.
摘要翻译：存储设备包括位于控制器（112）或存储器（104）中的读取电压引擎（114）。由于诸如数据保持，读取干扰和/或编程干扰的各种效应，数据存储元件的阈值电压可能发生偏移，当使用原始读取电压读取时产生错误。读取电压引擎（114）调整要由控制器（112）使用以从非易失性存储器（104）读取数据的读取电压。在操作期间，当要从存储器（104）读取数据时，例如当从主机设备（116）接收到请求时，控制器（112）可被配置为读取跟踪数据的表示（122）（109）从所述存储器（104）的至少一部分（例如所述第一部分）移除。随着时间的推移，存储的跟踪数据（109）可能容易受到错误的影响，导致跟踪数据（109）的表示（122）可能包括一个或多个错误。控制器（112）还可以将与从存储器（104）读取的一个或多个状态中的对应于存储元件的跟踪数据（109）的表示（122）中的位的计数比较到跟踪中的相应位数数据（109）和读取电压引擎（114）可以被配置为基于比较来调整要由控制器（112）使用的读取电压以从存储器（104）读取数据。

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