WO2006068993A3 - Method for copying data within a reprogrammable non-volatile memory - Google Patents

Method for copying data within a reprogrammable non-volatile memory Download PDF

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Publication number
WO2006068993A3
WO2006068993A3 PCT/US2005/045909 US2005045909W WO2006068993A3 WO 2006068993 A3 WO2006068993 A3 WO 2006068993A3 US 2005045909 W US2005045909 W US 2005045909W WO 2006068993 A3 WO2006068993 A3 WO 2006068993A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
ecc
error
memory
check
Prior art date
Application number
PCT/US2005/045909
Other languages
French (fr)
Other versions
WO2006068993A2 (en
WO2006068993B1 (en
Inventor
Andrew Tomlin
Original Assignee
Sandisk Corp
Andrew Tomlin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandisk Corp, Andrew Tomlin filed Critical Sandisk Corp
Priority to EP05854589A priority Critical patent/EP1828897B1/en
Priority to JP2007548357A priority patent/JP5069127B2/en
Priority to DE602005009868T priority patent/DE602005009868D1/en
Publication of WO2006068993A2 publication Critical patent/WO2006068993A2/en
Publication of WO2006068993A3 publication Critical patent/WO2006068993A3/en
Publication of WO2006068993B1 publication Critical patent/WO2006068993B1/en
Priority to IL184018A priority patent/IL184018A0/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/10—Programming or data input circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
    • G06F12/023—Free address space management
    • G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
    • G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1068—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices in sector programmable memories, e.g. flash disk
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
    • G06F2212/72—Details relating to flash memory management
    • G06F2212/7203—Temporary buffering, e.g. using volatile buffer or dedicated buffer blocks

Abstract

The present invention presents methods for improving data relocation operations. In one aspect, rather than check the quality of the data based on its associated error correction code (ECC) in every relocation operation, it is determined whether to check ECC based on predetermined selection criteria, and if ECC checking is not selected, causing the memory to perform an on-chip copy the data from a first location to a second location. If ECC checking is selected, the data is transferred to the controller and checked; when an error is found, a correction operation is performed and when no error is found, an on-chip copy is performed. The predetermined selection criteria may comprise a sampling mechanism, which may be random based or deterministic. In another aspect, data transfer flags are introduced to indicate data has been corrected and should be transferred back to the memory. A further aspect considers the header and user data separately if each has a distinct associated ECC.
PCT/US2005/045909 2004-12-21 2005-12-15 Method for copying data within a reprogrammable non-volatile memory WO2006068993A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05854589A EP1828897B1 (en) 2004-12-21 2005-12-15 Method for copying data within a reprogrammable non-volatile memory
JP2007548357A JP5069127B2 (en) 2004-12-21 2005-12-15 Method for copying data in a reprogrammable non-volatile memory
DE602005009868T DE602005009868D1 (en) 2004-12-21 2005-12-15 METHOD FOR COPYING DATA WITHIN A REPROGRAMMABLE NON-VOLATILE MEMORY
IL184018A IL184018A0 (en) 2004-12-21 2007-06-18 Method for copying data within a reprogrammable non-volatile memory

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/022,350 2004-12-21
US11/022,350 US7849381B2 (en) 2004-12-21 2004-12-21 Method for copying data in reprogrammable non-volatile memory

Publications (3)

Publication Number Publication Date
WO2006068993A2 WO2006068993A2 (en) 2006-06-29
WO2006068993A3 true WO2006068993A3 (en) 2007-01-11
WO2006068993B1 WO2006068993B1 (en) 2007-02-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/045909 WO2006068993A2 (en) 2004-12-21 2005-12-15 Method for copying data within a reprogrammable non-volatile memory

Country Status (10)

Country Link
US (2) US7849381B2 (en)
EP (1) EP1828897B1 (en)
JP (1) JP5069127B2 (en)
KR (1) KR101026391B1 (en)
CN (1) CN101124544A (en)
AT (1) ATE408864T1 (en)
DE (1) DE602005009868D1 (en)
IL (1) IL184018A0 (en)
TW (1) TWI443667B (en)
WO (1) WO2006068993A2 (en)

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