Storage device and communication control method
AssigneeToshiba Memory Corporation
InventorTakuya Sekine
Life of this patent
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Abstract
A storage device includes a nonvolatile memory and a controller. The controller is configured to control a first communication with a host device which is performed at a first transfer rate, and a second communication with the nonvolatile memory. The controller includes a detection circuit configured to detect a second transfer rate in the second communication with the nonvolatile memory, a processor configured to determine a target transfer rate in the first communication based on the second transfer rate detected by the detection circuit, and an interface configured to perform the first communication with the host device at the target transfer rate.
Claims17
A storage device comprising:
- a nonvolatile memory;
- and
- a controller configured to control a first communication with a host device, and a second communication with the nonvolatile memory, wherein the controller includes:
- a detection circuit configured to detect a transfer rate in the second communication with the nonvolatile memory;
- an interface circuit that is configurable to operate in one of a plurality of different operating modes to perform the first communication with the host device at a transfer rate corresponding to said one of the operating modes of the interface circuit;
- and
- a processor configured to determine an operating mode of the interface circuit based on the transfer rate in the second communication, and set the interface circuit to operate in the determined operating mode.
A storage device comprising:
- a nonvolatile memory;
- and
- a controller configured to control a first communication with a host device, and a second communication with the nonvolatile memory,
- wherein the controller includes:
- a detection circuit configured to detect a first transfer rate in the first communication with the host device;
- an interface circuit that is configurable to operate in one of a plurality of different operating modes to perform the first communication with the host device at a transfer rate corresponding to said one of the operating modes of the interface circuit;
- and
- a processor configured to determine an operating mode of the interface circuit based on the transfer rate in the first communication, and set the interface circuit to operate in the determined operating mode.
A communication control method comprising:
- performing a first communication between a host device and a storage device including a nonvolatile memory and a controller that controls the nonvolatile memory;
- detecting a transfer rate in a second communication between the controller and the nonvolatile memory;
- determining an operating mode of an interface circuit of the controller based on the transfer rate in the second communication;
- and
- configuring the interface circuit to operate in the determined operating mode to perform the first communication at a transfer rate corresponding to the determined operating mode.
Dependencies are inferred from the claim text.