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Memory system

A memory system and memory technology, applied in the field of memory systems, can solve problems such as the increase in the deviation of the number of erasures

Inactive Publication Date: 2010-02-03
KK TOSHIBA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when data is recorded, if data is directly recorded in an address specified from the outside, rewriting (that is, erasing processing) is temporally concentrated in a specific area, and the deviation in the number of times of erasing increases

Method used

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Examples

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no. 1 example

[0067] figure 1 is a block diagram of a configuration example of an SSD (Solid State Drive) 100 . The SSD 100 is connected to a host device 1 such as a personal computer or a CPU core through a memory connection interface such as an ATA interface (ATA I / F) 2 and used as an external memory of the host device 1 . Through the communication interface 3, such as an RS232C interface (RS232C I / F), the SSD 100 can transmit data to and receive data from the device 200 for debugging and manufacturing inspection. SSD100 comprises NAND type flash memory (hereinafter referred to simply as NAND memory) 10 as non-volatile semiconductor memory, drive control circuit 4 as controller, DRAM 20 as volatile semiconductor memory, power supply circuit 5, for state LED 6 for display, temperature sensor 7 for detecting the temperature in the driver, and fuse 8 .

[0068] The power supply circuit 5 generates a plurality of different internal DC power supply voltages from the external DC power supplie...

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Abstract

A memory system includes a WC 21 from which data is read out and to which data is written in sector units by a host apparatus, an FS 12 from which data is read out and to which data is written in pageunits, an MS 11 from which data is read out and to which data written in track units, an FSIB 12a functioning as an input buffer for the FS 12, and an MSIB 11a functioning as an input buffer to the MS 11. An FSBB 12ac that has a capacity equal to or larger than a storage capacity of the WC 21 and stores data written in the WC 21 is provided in the FSIB 12a. A data managing unit 120 that manages the respective storing units suspends, when it is judged that one kind of processing performed among the storing units exceeds predetermined time, the processing judged as exceeding the predetermined time and controls the data written in the WC 21 to be saved in the FSBB 12ac.

Description

technical field [0001] The present invention relates to a memory system including a nonvolatile semiconductor memory. Background technique [0002] As an external storage device used in a computer system, an SSD (Solid State Drive) mounted with a nonvolatile semiconductor memory such as a NAND type flash memory is attracting attention. Compared with magnetic disk devices, flash memory has advantages such as high speed and light weight. [0003] The SSD includes: a plurality of flash memory chips; a controller that performs read / write control on the respective flash memory chips in response to a request from a host device; Data transmission with a host device; a power supply circuit; and a connection interface with a host device (see, for example, Patent Document 1). [0004] Examples of nonvolatile semiconductor memories include nonvolatile semiconductor memories in which units of erasing, writing, and reading are fixed, such as nonvolatile semiconductor memories that eras...

Claims

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Application Information

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IPC IPC(8): G06F12/08G06F12/00G06F3/06G06F12/02G06F3/08G11C16/02
CPCG06F12/0804G06F12/0897G06F2212/1016G06F12/0246G06F12/0866G06F2212/7203G06F12/02G06F12/06G06F12/08G06F13/16
Inventor 矢野纯二松崎秀则初田幸辅
Owner KK TOSHIBA
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