NONVOLATILE MEMORY DEVICE, NONVOLATILE MEMORY SYSTEM, AND HOST DEVICE
First Claim
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1. A nonvolatile memory device which comprises:
- a memory controller; and
a nonvolatile memory and which writes a file given from an external host device into said nonvolatile memory and reads a specified file, whereinsaid memory controller comprises;
a clock part to which an initial value of time information is provided from outside and which measures time only for a period when a power is supplied;
a file system manager for generating file management information including the time information measured by said clock part in writing of a file; and
a control part for writing the file management information generated by said file system manager and files into said nonvolatile memory.
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Abstract
A nonvolatile memory device has a file system manager and manages the file system of a file to be recorded. The nonvolatile memory device measures time by obtaining time information from outside in each writing file data or based on time information preliminarily obtained. At the time of writing file data, management information of the file system is configured based on the time information at the time. Thus, the time information can be stored in a file entry table, and the time information can be used as file management information. The nonvolatile memory system with high user'"'"'s convenience can be provided.
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Citations
23 Claims
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1. A nonvolatile memory device which comprises:
- a memory controller; and
a nonvolatile memory and which writes a file given from an external host device into said nonvolatile memory and reads a specified file, whereinsaid memory controller comprises; a clock part to which an initial value of time information is provided from outside and which measures time only for a period when a power is supplied; a file system manager for generating file management information including the time information measured by said clock part in writing of a file; and a control part for writing the file management information generated by said file system manager and files into said nonvolatile memory. - View Dependent Claims (2, 3, 4, 5, 6, 16)
- a memory controller; and
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7. A nonvolatile memory device which comprises:
- a memory controller; and
a nonvolatile memory and which writes a file given from an external host device into said nonvolatile memory and reads a specified file, whereinsaid memory controller comprises; a file system manager for generating file management information including the time information given from outside of said nonvolatile memory device in writing of a file; and a control part for writing the file management information generated by said file system manager and files into said nonvolatile memory. - View Dependent Claims (8, 9, 10, 11, 12)
- a memory controller; and
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13. A nonvolatile memory system comprising:
- a host device, and a nonvolatile memory device which writes a file given from said host device and reads a specified file, wherein
said nonvolatile memory device comprises;
a memory controller; and
a nonvolatile memory, andsaid memory controller comprises; a clock part to which an initial value of time information is provided from outside and which measures time only for a period when a power is supplied; a file system manager for generating file management information including the time information measured by said clock part in writing of a file; and a control part for writing the file information including management information generated by said file system manager into said nonvolatile memory. - View Dependent Claims (14, 15)
- a host device, and a nonvolatile memory device which writes a file given from said host device and reads a specified file, wherein
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17. A nonvolatile memory system comprising:
- a host device, and a nonvolatile memory device which writes a file given from said host device and reads a specified file, wherein
said nonvolatile memory device comprises;
a memory controller; and
a nonvolatile memory, andsaid memory controller comprises; a file system manager for generating file management information including the time information given from outside of said nonvolatile memory device in file writing; and a control part for writing the file management information generated by said file system manager and files into said nonvolatile memory. - View Dependent Claims (18, 19, 20)
- a host device, and a nonvolatile memory device which writes a file given from said host device and reads a specified file, wherein
- 21. A host device applying an electric voltage to a nonvolatile memory device and reading and writing a file, wherein said host device informs said nonvolatile memory device of file data and the time information respectively in writing of a file.
Specification
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Current AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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Original AssigneePanasonic Corporation (Panasonic Holdings Corporation)
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InventorsMaeda, Takuji, Honda, Toshiyuki, Nakanishi, Masahiro
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Application NumberUS12/374,671Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current711/103CPC Class CodesG06F 3/0607 by facilitating the process...G06F 3/0643 Management of filesG06F 3/0679 Non-volatile semiconductor ...
