Volatile memory, memory module including the same, and method for operating the memory module
A memory module includes an emergency power supplier, a plurality of ranks each including one or more volatile memories, a non-volatile memory, and a controller suitable for backing up data of the ranks into the non-volatile memory by using the emergency power supplier during a power failure, wherein the ranks are sequentially backed up, and while one rank is backed up among the ranks, the other ranks are controlled in a self-refresh mode.
1. A volatile memory, comprising:
a clock enables reception unit suitable for receiving a clock enable signal;
a mode setup unit suitable for setting up a self-refresh prevention mode for preventing the volatile memory from entering a self-refresh mode; and
a self-refresh control unit suitable for generating a self-refresh mode signal in response to the clock enable signal and an internal refresh command, while maintaining the self-refresh mode signal in a disabled state in the self-refresh prevention mode when entering the self-refresh mode is indicated by the clock enable signal and the internal refresh command.
2. The volatile memory of claim 1 , further comprising:
a command reception unit suitable for receiving a command;
an address reception unit suitable for receiving an address; and
a command decoding unit suitable for generating an internal mode register set command and the internal refresh command by decoding the command,
wherein the mode setup unit sets up the self-refresh prevention mode based on the internal mode register set command and the address.
3. The volatile memory of claim 1 , wherein the entering of the self-refresh mode is indicated when the clock enable signal is disabled from a logic high level to a logic low level and the self-refresh mode signal is enabled.