SEMICONDUCTOR MEMORY STORAGE DEVICE, AND MEMORY UNIT FOR USE IN THE SAME

Title:

SEMICONDUCTOR MEMORY STORAGE DEVICE, AND MEMORY UNIT FOR USE IN THE SAME

Document Type and Number:

Japanese Patent JP2009053738

Kind Code:

A

Abstract:

To allow even anomalies in a semiconductor memory storage device due to failures in semiconductor memory chips to be solved without replacement of a memory unit.

The semiconductor memory storage device writes an input information signal to the memory unit 11 after compression in an encoder 10. The signal read out from the memory unit 11 is output after decoding in a decoder 12. The memory unit 11 comprises two types of boards comprising sub boards 20-1 to 20-256 mounted with the NAND semiconductor memory chips 21-1 to 21-256, and a main board 30 having sub board slots 31-1 to 31-256 where the respective sub boards 20-1 to 20-256 can be removably mounted. When the NAND semiconductor memory chip mounted on any sub board fails, a CPU 34 mounted on the main board 30 identifies the sub board mounted with the failed NAND semiconductor memory chip.

Inventors:

SUZUKI GENTAKU

Application Number:

JP2007217001A

Publication Date:

March 12, 2009

Filing Date:

August 23, 2007

Export Citation:

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Assignee:

TOSHIBA CORP

International Classes:

G06F12/16; G06F12/00; G06F12/06; G11C16/02

Domestic Patent References:

JP2004343682A	2004-12-02
JP2002033946A	2002-01-31
JPH10336562A	1998-12-18
JP2005301831A	2005-10-27

Attorney, Agent or Firm:

Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto

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