Nonvolatile memory device, nonvolatile memory system, and the access device

When accessing the nonvolatile memory device from the access device, the nonvolatile memory device or access device detects or calculates the temperature T of the nonvolatile memory device. Temperature adaptive controller of the nonvolatile memory device controls the access speed to the nonvolatile memory based on the temperature T. And the temperature T of the nonvolatile memory device does not exceed the limit temperature Trisk. Thus there is no risk of burns even when taking out the non-volatile memory device may be a non-volatile memory system that can and literate fast.