Patent ID: 9704593
Date: 2017-07-11
CPC Classifications: G06F,G11C,Y02D

Claim:
1. A data storage device comprising: a controller driven by a first power supply voltage; a nonvolatile memory controlled by the controller and driven by a second power supply voltage; a switch element determining whether or not the second power supply voltage is applied to the nonvolatile memory, a power consumption being generated by the second power supply voltage in the nonvolatile memory when turning on the switch element, and no power consumption being generated in the nonvolatile memory when turning off the switch element, wherein the controller is configured to turn off the switch element in a first mode and turn on the switch element in a second mode, wherein the first mode is executed when the controller receives no new command for a first period after a last command is executed in the second mode, wherein the new command is a command which accesses the nonvolatile memory, wherein the nonvolatile memory comprises a memory core and an I/O part, wherein the memory core is driven by the second power supply voltage, and wherein the I/O part is driven by a third power supply voltage different from the second power supply voltage.