Device and method for repairing memory cell and memory system including the device

A method of operating a dynamic random access memory (DRAM) device, the DRAM device having a memory cell array, a non-volatile memory (NVM) storage array, and a fail address memory (FAM), the method comprising:

• receiving a first mode register set command for entering into a repair mode;
• receiving an active command and a row fail address, the row fail address indicating a row of the memory cell array including a defective memory cell;
• receiving a write command and a column fail address, the column fail address indicating a column of the memory cell array including the defective memory cell;
• storing the row fail address and the column fail address in the fail address memory;
• programming the row fail address and the column fail address in the non-volatile memory storage array;
• receiving a pre-charge command after programming the row fail address and the column fail address;
• and
• receiving a second mode register set command for exiting the repair mode after performing a pre-charge operation according to the pre-charge command.

A memory system, comprising:

• a memory controller configured to transmit a first mode register set command and an active command together with a row fail address, a pre-charge command and a second mode register set command;
• and
• a dynamic random access memory (DRAM) device, the DRAM device having a memory cell array, a non-volatile memory (NVM) storage array, and a fail address memory (FAM) and configured to:
• receive the first mode register set command for entering into a repair mode;
• receive the active command and the row fail address, the row fail address indicating a row of the memory cell array including at least one defective memory cell;
• store the row fail address in the fail address memory;
• program the row fail address in the non-volatile memory storage array;
• receive the pre-charge command after programming the row fail address;
• and
• receive the second mode register set command for exiting the repair mode after performing a pre-charge operation according to the pre-charge command.