Data transfer control device and data storage device
AssigneeKabushiki Kaisha Toshiba
InventorTakashi Ishiguro
Life of this patent
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Abstract
According to one embodiment, a data transfer control device complying with a communication protocol which executes an update of information from an attachment device in a predetermined area of a system memory, the device includes a receiving part receiving the information from the attachment device, a transferring part transferring the information in the predetermined area, the information from the transferring part overwritten in the predetermined area sequentially, and a determining part inhibiting a transfer of the information in the transferring part to omit the update of the information in the predetermined area.
Claims19
A data transfer control device complying with a communication protocol which executes an update of information from an attachment device in a predetermined area of a system memory, the device comprising:
- a receiving part receiving the information from the attachment device;
- a transferring part transferring the information in the predetermined area, the information from the transferring part overwritten in the predetermined area sequentially;
- and
- a determining part inhibiting a transfer of the information in the transferring part to omit the update of the information in the predetermined area,
- wherein the information is a frame information structure (FIS)-information as a response of a selected command among registered commands, and
- the determining part allows transferring the information to the system memory when the selected command is a final command, and inhibits transferring the information to the system memory when the selected command is a command except the final command.
A data transfer control device complying with a communication protocol which executes an update of information from an attachment device in a predetermined area of a system memory, the device comprising:
- a receiving part receiving the information from the attachment device;
- a transferring part transferring the information in the predetermined area, the information from the transferring part overwritten in the predetermined area sequentially;
- and
- a determining part inhibiting a transfer of the information in the transferring part to omit the update of the information in the predetermined area,
- wherein the information is a frame information structure (FIS)-information showing a preparation of a data transmitting from the attachment device, and
- the determining part allows transferring the information to the system memory when the data transmitting is a final data transmitting, and inhibits transferring the information to the system memory when the data transmitting is a data transmitting except the final data transmitting.
A data transfer control device complying with a communication protocol which executes an update of information from an attachment device in a predetermined area of a system memory, the device comprising:
- a receiving part receiving the information from the attachment device;
- a transferring part transferring the information in the predetermined area, the information from the transferring part overwritten in the predetermined area sequentially;
- and
- a determining part inhibiting a transfer of the information in the transferring part to omit the update of the information in the predetermined area,
- wherein the information is a frame information structure (FIS)-information showing an execution of a read/write with respect to the attachment device directly, and
- the transferring the information to the system memory is executed after a completion of all data read/write with respect to the attachment device, and is not executed before the completion of all data read/write with respect to the attachment device.
Dependencies are inferred from the claim text.