The inventive concepts described herein relate to a nonvolatile memory device, a memory system including the nonvolatile memory device, and/or an external power control method.
Semiconductor memory devices may be volatile or nonvolatile. A nonvolatile semiconductor memory device may retain data stored therein even at power-off. The nonvolatile memory device may be permanent or reprogrammable, depending upon the fabrication technology used. The nonvolatile memory device may be used for user data, program, and microcode storage in a wide variety of applications in the computer, avionics, telecommunications, and consumer electronics industries. A nonvolatile memory device often utilizes an external supply voltage, however, a typical nonvolatile memory device may not detect a drop in voltage level of the supply voltage and control an internal circuit according to the detection result. Which may result in problems in reliably operating the nonvolatile memory device.
USPTO Backgrounds
USPTO Backgrounds