Nonvolatile memory device, data storage device and operating method thereof

A data storage device comprising:

• a nonvolatile memory device;
• and
• a controller configured to control the nonvolatile memory device,
• wherein the nonvolatile memory device includes:
• a control unit configured to be operated by a first operation voltage supplied from a first voltage supply unit of a host device as an external device, and to perform a program operation to a target memory area positioned in a first power region of the nonvolatile memory device;
• and
• a status storage unit configured to be operated by a second operation voltage separated from the first operation voltage and simultaneously supplied from a second voltage supply unit of the host device, and to store a program status information for the target memory area while the program operation is performed,
• wherein the control unit and the target memory area are positioned in the first power region of the nonvolatile memory device, which is supplied with the first operation voltage,
• wherein the status storage unit is positioned in a second power region of the nonvolatile memory device, which is separated from the first power region and supplied with the second operation voltage which is independent from the first operation voltage, and retains the program status information even when a sudden power-off occurs in the first power region, and
• wherein the first voltage supply unit is only coupled to the control unit and the target memory region of the first power region of the nonvolatile memory device and the second voltage supply unit is coupled to the status storage unit of the second power region of the nonvolatile memory device.

A method for operating a data storage device, comprising:

• obtaining a status information from a status storage unit positioned in a second power region of a nonvolatile memory device when it is determined that a program operation to a target memory area positioned in a first power region of the nonvolatile memory device is interrupted;
• and
• determining, based on the status information, whether to resume the program operation to the target memory area,
• wherein the obtaining includes retaining the status information in the status storage unit positioned in the second power region separated from the first power region even when the program operation is interrupted in the first power region,
• wherein the first power region is supplied with a first operation voltage from a first power supply unit of a host device as an external device and the second power region is simultaneously supplied with a second operation voltage from a second power supply unit of the host device which is independent from the first operation voltage, and
• wherein the first voltage supply unit is only coupled to the control unit and the target memory region of the first power region of the nonvolatile memory device and the second voltage supply unit is coupled to the status storage unit of the second power region of the nonvolatile memory device.