Storage device, operation method of storage device, and nonvolatile memory device of storage device

A storage device comprising

• a plurality of nonvolatile memory devices, and
• a storage controller configured to:
• select at least a first nonvolatile memory device of the plurality of nonvolatile memory devices based on control of a plurality of chip enable signals to be transferred to the plurality of nonvolatile memory devices;
• use a first chip enable signal of the plurality of chip enable signals as a reduced chip enable signal and remaining chip enable signals of the plurality of chip enable signals as chip enable address signals;
• select the at least first nonvolatile memory device of the plurality of nonvolatile memory devices based on activation of the reduced chip enable signal and control of the chip enable address signals;
• and
• generate each chip enable address signal of the chip enable address signals based on one of at least three voltage levels.