Semiconductor memory device and method for operating a semiconductor memory device
View Patent ↗A method for operating a semiconductor memory device is disclosed. In one embodiment, the method includes activating a first memory cell sub-array or memory cells of the first memory cell sub-array that are contained in a first set of memory cells, in particular of memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array or in the first set of memory cells is/are to be accessed. The corresponding memory cell or memory cells are accessed; including leaving the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells is/are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.
1. A method for operating a semiconductor memory device comprising:
defining the semiconductor memory device to include a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays;
activating a first memory cell sub-array or memory cells of the first memory cell sub-array that are contained in a first set of memory cells, including memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array or in the first set of memory cells is/are to be accessed;
accessing the corresponding memory cell or memory cells; and
leaving the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells is/are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.
2. The method according to claim 1 , comprising wherein, for activating the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells, an activate signal is used.
3. The method according to claim 1 , comprising wherein, if one or a plurality of further memory cells are to be accessed which are contained in a third memory cell sub-array of the same memory cell array that comprises the first and the second memory cell sub-array, the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are deactivated.
4. The method according to claim 3 , comprising wherein the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are deactivated if the third memory cell sub-array uses means, which can also be used by the first memory cell sub-array, and wherein the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are left in the activated state if the means, used by the third memory cell sub-array are not used or cannot be used by the first memory cell sub-array.
5. The method according to claim 4 , comprising wherein the means is a sense amplifier means.
6. The method according to claim 5 , comprising wherein, in reaction to the activate signal, the sense amplifier means used by the first memory cell sub-array read out the data stored in the first set of memory cells or in the memory cells of the first memory cell sub-array.
7. The method according to claim 6 , comprising wherein, in reaction to a read signal output after the activate signal, corresponding switches are first of all closed, so that lines that are connected with the sense amplifier means are connected with corresponding data input/output lines of the first memory cell sub-array, and wherein sense amplifier means that are selected by a select signal then output the data read out by same, in particular via the lines and the data input/output lines.
8. The method for device according to any of claim 1 , which comprises a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays, wherein the method further comprises:
activating memory cells of a first memory cell sub-array that are contained in a first set of memory cells if one or a plurality of the memory cells contained in the first set of memory cells is/are to be accessed;
accessing the corresponding memory cell or memory cells; and
leaving the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells is/are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array, beyond the beginning or the end, respectively, of the access to the one or the plurality of further memory cells, if sense amplifier means used by the second memory cell sub-array are not used by the first memory cell sub-array.
9. The method according to claim 8 , the method additionally comprising:
deactivating the memory cells of the first memory cell sub-array that are contained in the first set of memory cells only if one or a plurality of additional memory cells is/are to be accessed which are contained in a third memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array if sense amplifier means used by the third memory cell sub-array are also used by the first memory cell sub-array.
10. A semiconductor memory device comprising:
a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays;
a controller for activating a first memory cell sub-array or memory cells of the first memory cell sub-array that are contained in a first set of memory cells, in particular of memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array or in the first set of memory cells is/are to be accessed; and
wherein the controller is designed such that it leaves the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.
11. The semiconductor memory device according to claim 10 , wherein the controller, in particular an array and/or sub-array controller, is designed such that it deactivates the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells if one or a plurality of further memory cells are to be accessed which is/are contained in a third memory cell sub-array of the same memory cell array that comprises the first and the second memory cell sub-array.
12. A method for operating a semiconductor memory device comprising:
defining the semiconductor memory device to include a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays;
activating a first memory cell sub-array or memory cells including memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array or in the first set of memory cells is/are to be accessed;
accessing the corresponding memory cell or memory cells; leaving the activated memory cells of the first memory cell sub-array in the activated state if one or a plurality of further memory cells are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.
13. The method according to claim 12 , comprising wherein, if one or a plurality of further memory cells are to be accessed which are contained in a third memory cell sub-array of the same memory cell array that comprises the first and the second memory cell sub-array, the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are deactivated.
14. The method according to claim 13 , wherein the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are deactivated if the third memory cell sub-array uses means, in particular sense amplifier means, which can also be used by the first memory cell sub-array, and wherein the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells are left in the activated state if the means, in particular sense amplifier means, used by the third memory cell sub-array are not used or cannot be used by the first memory cell sub-array.
15. The method according to claim 14 comprising wherein, for activating the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells, an activate signal is used.
16. The method according to claim 15 , comprising wherein, in reaction to the activate signal, the sense amplifier means used by the first memory cell sub-array read out the data stored in the first set of memory cells or in the memory cells of the first memory cell sub-array.
17. The method according to claim 16 , comprising wherein, in reaction to a read signal output after the activate signal, corresponding switches are first of all closed, so that lines that are connected with the sense amplifier means are connected with corresponding data input/output lines of the first memory cell sub-array, and wherein sense amplifier means that are selected by a select signal then output the data read out by same, in particular via the lines and the data input/output lines.
18. A semiconductor memory device comprising:
a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays;
a controller for activating memory cells of a first memory cell sub-array, in particular of memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array are to be accessed; and
wherein the controller is designed such that it leaves the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.
19. The semiconductor memory device according to claim 18 , wherein the controller, is designed such that it deactivates the first memory cell sub-array or the memory cells of the first memory cell sub-array if one or a plurality of further memory cells are to be accessed which are contained in a third memory cell sub-array of the same memory cell array that comprises the first and the second memory cell sub-array.
20. A semiconductor memory device comprising:
a plurality of memory cell arrays each comprising a plurality of memory cell sub-arrays;
control means for activating memory cells of a first memory cell sub-array, in particular of memory cells positioned in one and the same row or column of the first memory cell sub-array, if one or a plurality of memory cells contained in the first memory cell sub-array are to be accessed; and
wherein the control means is designed such that it leaves the first memory cell sub-array or the memory cells of the first memory cell sub-array that are contained in the first set of memory cells in the activated state if one or a plurality of further memory cells are to be accessed which are contained in a second memory cell sub-array of the same memory cell array that comprises the first memory cell sub-array.