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Memory system

a memory system and memory technology, applied in the field of memory systems, can solve problems such as copyright infringement, and achieve the effect of reliably storing irreversible changes of state and preventing erroneous writing

Inactive Publication Date: 2011-05-24
TOSHIBA MEMORY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]Another object of the invention is to provide a control method of nonvolatile semiconductor memory including an OTP in a part of its memory region, which is capable of writing a mark data reliably preventing erroneous writing, etc. in the OTP region and clearly maintaining the boundary between a written region and a non-written region, and hence reliably storing irreversible changes of state.

Problems solved by technology

However, since a memory system using the flash memory FM can easily copy any files including copyrighted ones, such as musical data, and infringement of copyrights has been an issue of this system.
The demand arises, for example, in devices having a flash memory system for intake and transfer of musical data, for example, which are subjects of the serious copyright problem, when duplication of musical data must be limited to a certain extent.

Method used

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first embodiment

[0103]The first embodiment of the memory system according to the invention is explained below. This embodiment is directed to flash memory for sale after storing literary works.

[0104]There are various ways for copyright protection. In this embodiment, identifying information is previously written in the CIS filed (field B in FIG. 7 permitting any arbitrary data to be set) of the flash memory card FMC. Although details will be explained later, the identifying information is one for restricting conditions for enabling the use of a file of a literary work stored in the flash memory FM. This identifying information may be named as identifying code.

[0105]As shown in FIG. 8, an end user can listen to music or to watch images by setting the flash memory card FMC in the system apparatus SYS1 according to the first embodiment (for example, music reproducing apparatus, image display apparatus, etc.). Additionally, the end user can remove the flash memory card FMC from the system apparatus SYS...

second embodiment

[0115]Next explained is the second embodiment of the memory system according to the invention. Similarly to the first embodiment, this embodiment is also directed to flash memory for sale after storing literary works.

[0116]A general aspect of the second embodiment is shown in FIG. 9. In this embodiment, identifying information is stored in the field B of CIS (see FIG. 7) in the flash memory card FMC, and simultaneously, information related to the identifying information stored on CIS is taken into the file itself to be stored in the flash memory card FMC.

[0117]For example, in the case where the identifying information of CIS in the flash memory card FMC(A) is “ABC” as shown in FIG. 9, information related to the identifying information “ABC” is introduced into the file to be stored in the flash memory card FMC(A). For simplicity, here is shown a case where the row of letters “ABC”, in the same form, is taken also as the identifying information in the file.

[0118]A system apparatus SYS...

third embodiment

[0134]Next explained is the third embodiment of the memory system according to the invention. Although the first and second embodiments take the cases where a flash memory card FMC is put on sale after storing a literary work, the embodiment shown here takes a case where the information of the literary work itself is the subject to be sold, and the literary work is purchased by down-loading it on a flash memory card FMC on sale.

[0135]For example, through a download-dedicated terminal DLT settled in a drug store, station or any other convenient place, information of a literary work is downloaded into the flash memory card FMC. The dedicated download terminal DLT is a terminal exclusive to download of literary works, which can freely refer to or rewrite the CIS field of a flash memory card FMC. That is, it is sufficient that the result of writing the file of the literary work on the flash memory card FMC through the dedicated download terminal represents the status on sale of the flas...

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Abstract

In a memory system using a removable recording medium and data stored in the recording medium, identifying information for identifying each recording medium from others is held in the recording medium, and when data stored in the recording medium is used, the identifying information of the recording medium is required. As a result, when a flash memory card, etc. is used, a copyright is reliably protected.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to a memory system using semiconductor memory to be used for the purpose of protecting copyrights. The invention also relates to a control method of electrically erasable and programmable nonvolatile semiconductor memory, especially useful for use to NAND EEPROM (electrically erasable and programmable read-only memory).[0003]2. Description of the Prior Art[0004]A flash memory card FMC as shown in FIG. 1 has become of major interest lately as a recording medium of portable information devices such as digital still cameras, PDA (personal digital assistant), for example. The flash memory card FMC is a thin plastic package having formed a slight recess holding a built-in flash memory device FM with 22-pin planar electrodes. The flash memory card FMC can exchange data with a host system (personal computer) when electrically connected to the host system via a connector. For example, using a PC card adap...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06F12/14G11C16/02G06F21/00
CPCG06F12/1433G06F21/10G06F21/79G11C16/02
Inventor TANAKA, YOSHIYUKINAKAMURA, HIROSHISUKEGAWA, HIROSHINAKABAYASHI, MIKITOKAWAMOTO, KAZUYA
Owner TOSHIBA MEMORY CORP
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