Data storage device and information processing system incorporating data storage device
A data storage device comprises a plurality of memory devices and a memory controller. The memory controller exchanges data with the memory devices via a plurality of channels. The memory controller decodes an external command to generate a driving power mode and accesses the memory devices according to the driving power mode.
1. A storage device operating under the control of a host, the storage device, comprising:
a plurality of memory devices; and
a memory controller that exchanges data with the memory devices via a plurality of channels, decodes a command received from the host to determine a driving power mode, activates at least two activated channels among the plurality of channels according to the driving power in order to access the memory devices, and adjusts a degree of interleaving between the at least two activated channels according to the driving power mode.
2. A data storage device operating under control of a host, the storage device comprising:
a plurality of memory devices; and
a memory controller that receives from a basic input/output system (BIOS) of the host a vendor specific command indicating a driving power mode that controls configuration of the memory devices, such that the memory controller exchanges data with the memory devices via a plurality of channels according to the command and the command adjusts at least one of a degree of interleaving among the plurality of channels, and a number of activated channels among the plurality of channels.
3. The data storage device of claim 2 , wherein the power driving mode is defined at least in part by a residual power amount provided by a power source powering the storage device.
4. The data storage device of claim 3 , wherein the memory controller respectively adjusts access start times of the activated channels according to the driving power mode.
5. The data storage device of claim 2 , further comprising a buffer memory that buffers data received from the host under control of the memory controller;
wherein the memory controller adjusts a frequency of a clock driving the buffer memory according to the driving power mode.
6. The data storage device of claim 2 , wherein the memory controller comprises a central processing unit that decodes the command, and a frequency of a clock controlling the central processing unit is adjusted according to the command.
7. The data storage device of claim 2 , wherein the memory controller adjusts both the degree of interleaving among the plurality of channels, and the number of activated channel among the plurality of channels according to the command.
8. The data storage device of claim 2 , wherein each of one of the plurality of memory devices is a flash memory device, and the plurality of memory devices and the memory controller are operatively arranged to form a solid state drive.
9. A data storage device operating under control of a host, the storage device comprising:
a plurality of memory devices; and
a memory controller that receives from a basic input/output system (BIOS) of the host a vendor specific command indicating a driving power mode that controls configuration of the memory devices, such that the memory controller exchanges data with the memory devices via a plurality of channels according to the command and the command adjusts a degree of interleaving among the plurality of channels.