Volatile memory device, memory module including the same, and method of operating memory module

Abstract

A memory module includes an emergency power; a volatile memory device including a plurality of memory blocks; a nonvolatile memory device; and a module control block suitable for controlling data of the volatile memory device to be backed up to the nonvolatile memory device by using the emergency power when a power failure occurs, wherein data of the memory blocks are sequentially backed up to the nonvolatile memory device, and a refresh operation prohibited for a memory block of which back up is completed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2014-0045920 filed on April 17, 2014, the entire contents of which are incorporated herein by reference. technical field [0003] Embodiments of the present invention relate to a volatile memory device and a memory module including the volatile memory device. Background technique [0004] A memory cell of a volatile memory such as a DRAM includes a transistor serving as a switch and a capacitor storing electric charges corresponding to data. Whether the data is high (ie, logic 1) or low (ie, logic 0) is determined according to the amount of charge charged in the capacitor of the memory cell (ie, whether the voltage at the terminal of the capacitor is high or low). [0005] Since the retention of data is realized by accumulating charge in the capacitor, power consumption does not occur in principle. However, due to current leakage caused by the PN ...

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Problems solved by technology

However, the increase in capacitance of power capacitors used as emergency power sources is directly related to the increase in cost

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