Memory device performing target refresh operation and operating method thereof
AssigneeSK hynix Inc.
InventorJung Taek YOU
Life of this patent
Estimating the term…
Abstract
A memory device includes: a memory cell region including normal cells coupled to normal column selection lines, and row-hammer cells and redundancy cells respectively coupled to redundancy column selection lines; a repair control circuit configured to provide repair addresses and row-hammer flag signals, corresponding to repair information, according to a row address; and a column control circuit configured to activate at least one of the redundancy column selection lines according to the row-hammer flag signals or a comparison result of a column address and the repair addresses.
Claims8
A memory device comprising:
- a memory cell region including normal column selection lines and redundancy column selection lines, and in which memory cells coupled to unused redundancy column selection lines for repair among the redundancy column selection lines are allocated to row-hammer cells;
- and
- a refresh control circuit configured to select a target address based on access counting data provided from the row-hammer cells, and update the access counting data to write-back the updated access counting data to the row-hammer cells, during a row-hammer tracking mode.
An operating method of a memory device, the operating method comprising:
- storing repair addresses and row-hammer flag signals corresponding to redundancy column selection lines, based on repair information during boot-up, while setting a corresponding row-hammer flag signal without storing a repair address corresponding to an unused redundancy column selection line among the redundancy column selection lines;
- selecting one of the redundancy column selection lines according to the row-hammer flag signals, and reading access counting data from row-hammer cells coupled to the selected redundancy column selection line, during a row-hammer tracking mode;
- and
- selecting a target address based on the access counting data, and updating the access counting data to write-back the updated access counting data to the row-hammer cells.
Dependencies are inferred from the claim text.