Content data storage device and its control method
AssigneeKabushiki Kaisha Toshiba
InventorToshiaki Aoki
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Abstract
A content data storage device which stores content data in nonvolatile memories from which data is erasable in units of blocks includes a bus width conversion unit converting a transmission bus to buses of a plurality of systems, a storage unit including a plurality of sets of memories, a plurality of switching units selectively switching between derivation of the content data and derivation of command signals and addresses, a controller configuring to perform (i) conversion control, (ii) state control, (iii) supply control, and (iv) switching control, the controller controlling the operation for reading and writing the content data with reference to the nonvolatile memories, and, a plurality of switch on and off units selectively switching on or off the content data, the command signals and the addresses.
Claims14
A content data storage device which stores content data in nonvolatile memories from which data is erasable in units of blocks, comprising:
- a bus width conversion unit which converts a transmission bus of the content data to buses of a plurality of systems;
- a storage unit which includes a plurality of sets of memories where the nonvolatile memories are connected to the buses of the plurality of systems, respectively;
- a plurality of switching units provided for the buses of the plurality of systems and selectively switching between derivation of the content data and derivation of command signals and addresses that instruct read and write operations;
- a controller configured to perform (i) conversion control by which the bus width of the bus width conversion unit is converted, (ii) state control by which the nonvolatile memory of a given one of the sets of the memories is switched into an active state, (iii) supply control by which the command signals and the addresses are supplied to the storage unit, and (iv) switching control by which the switching units are selectively switched, said controller controlling the operation for reading and writing the content data with reference to the nonvolatile memories when the nonvolatile memories are in the active state;
- and
- a plurality of switch on and off units provided for the buses of the plurality of systems and selectively switches on or off the content data, the command signals and the addresses derived from the plurality of switching units.
A control method for use in a content data storage device which stores content data in nonvolatile memories from which data is erasable in units of blocks, said control method comprising:
- switching nonvolatile memories, which are included among a plurality of memories having the nonvolatile memories connected to a plurality of buses, into an active state;
- supplying command signals and addresses that instruct a write operation and a read operation;
- switching from derivation of the command signals and the addresses to derivation of the content data when the command signals and the addresses are supplied to the nonvolatile memories that are in the active state;
- and
- expanding a bus width of a transmission bus of the content data to buses of the plurality of systems, and then writing the content data in the nonvolatile memories that are in the active state.
Dependencies are inferred from the claim text.