Patent ID: 11908507
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 10:
11. A semiconductor memory device comprising:
a command and address generator configured to decode a command to generate an active command and a refresh command, and to generate an address applied with the active command as a row address;
a control signal generator configured to generate sequence data changing with random sequence in response to the active command, and to generate a random pick signal in response to the sequence data being equal to previously stored comparison data;
a hammer refresh address generator configured to receive the row address in response to the active command, to detect a corresponding row address as an aggressor row address in response to the same row address being applied at least a specific number of times, and to generate at least one victim row address adjacent to the aggressor row address as a hammer refresh row address together with a hammer refresh command;
a normal refresh address generator configured to generate a normal refresh row address in response to the refresh command;
a selection circuit configured to select the hammer refresh row address in response to the hammer refresh command and select the normal refresh row address in response to the refresh command, so as to generate a refresh row address;
a row decoder configured to decode the row address in response to the active command and to decode the refresh row address in response to the refresh command or the hammer refresh command, so as to generate a plurality of main word line selection signals and a plurality of selection signals; and
a memory cell array comprising an odd page memory cell array including a plurality of first memory cells and an even page memory cell array including a plurality of second memory cells, and configured to perform an active operation on selected first memory cells a selected page memory cell array of the odd page memory cell array or selected second memory cells of a selected page memory cell array of the even page memory cell array in response to a page selection signal, the plurality of main word line selection signals, and the plurality of selection signals and based on the random pick signal being deactivated in response to the active command, or configured to simultaneously perform the active operation and a hidden hammer refresh operation on the selected first memory cells of the odd page memory cell array and the selected second memory cells of the even page memory cell array in response to the plurality of main word line selection signals and the plurality of selection signals, the simultaneously performing the active operation and the hidden hammer refresh operation being regardless of the page selection signal and being based on the random pick signal is activated, the simultaneously performing the active operation and the hidden hammer refresh operation being in response to the active command,
wherein the active operation and the hidden hammer refresh operation are the same.