公开(公告)号：US20170329724A1

公开(公告)日：2017-11-16

申请号：US15527374

申请日：2015-10-08

Applicant: SONY CORPORATION

Inventor： HARUHIKO TERADA ,  LUI SAKAI ,  HIDEAKI OKUBO ,  KEIICHI TSUTSUI

IPC: G06F12/16 ,  G06F11/22 ,  G06F11/14

CPC classification number: G06F12/16 ,  G06F11/1441 ,  G06F11/22 ,  G11C11/5685 ,  G11C13/0023 ,  G11C13/0033 ,  G11C13/004 ,  G11C29/028 ,  G11C2013/0054

Abstract: To suppress the degradation of memory cells in a non-volatile memory. A read processing unit performs a read process for reading read data from each of a plurality of memory cells on the basis of a first threshold. An error detection unit detects presence or absence of an error in the read data and specifies memory cells in which the error is present among the plurality of memory cells. A re-read processing unit performs a re-read process for reading data, as re-read data, from the specified memory cells on the basis of a second threshold different from the first threshold. A refresh processing unit rewrites, for a memory cell of which the re-read data has a different value from the read data among the specified memory cells, data with the re-read data as a refresh process.

公开(公告)号：US20170322842A1

公开(公告)日：2017-11-09

申请号：US15529697

申请日：2015-10-08

Applicant: SONY CORPORATION

Inventor： HIROYUKI IWAKI ,  KEIICHI TSUTSUI ,  LUI SAKAI ,  KENICHI NAKANISHI ,  HIDEAKI OKUBO ,  YASUSHI FUJINAMI

IPC: G06F11/10 ,  G06F12/10 ,  H03M13/15

CPC classification number: G06F11/1048 ,  G06F12/10 ,  G06F12/16 ,  G06F2212/65 ,  G11C13/0035 ,  H03M13/151 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/6325

Abstract: Reduction in deterioration of a memory cell in a non-volatile memory is achieved. A memory controller is configured to include a time measuring unit, an elapsed time determination unit, and a read unit. The time measuring unit measures time elapsed from predetermined timing on an address where data written. The elapsed time determination unit determines whether the elapsed time exceeds a fixed amount of time upon receiving an instruction to read out the data from the address. The read control unit causes reading-out of the data from the address to pause in a case where the elapsed time is determined not to exceed the fixed amount of time.

公开(公告)号：US20170185478A1

公开(公告)日：2017-06-29

申请号：US15325191

申请日：2015-06-23

Applicant: SONY CORPORATION

Inventor： LUI SAKAI ,  KEIICHI TSUTSUI ,  YASUSHI FUJINAMI ,  HIROYUKI IWAKI ,  KEN ISHII ,  NAOHIRO ADACHI ,  RYOJI IKEGAYA ,  KENICHI NAKANISHI

IPC: G06F11/10 ,  G06F3/06 ,  G11C29/52

CPC classification number: G06F11/1068 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/0679 ,  G06F11/1048 ,  G06F12/00 ,  G06F12/0246 ,  G06F12/16 ,  G06F2212/1032 ,  G06F2212/7209 ,  G11C29/52 ,  G11C2029/0411

Abstract: The convenience of an information processing system is improved. In a memory controller of the information processing system, a request generation unit generates, with respect to a nonvolatile memory including a data area in which data is stored and a redundancy area in which a redundancy for performing error detection and error correction of the data is stored, a request of requesting writing or reading for any one of the data, and the redundancy, a code word constituted of the data and the redundancy. A control unit issues the generated request and controls writing and reading with respect to the nonvolatile memory.