Stacked semiconductor memory device and control method thereof
View Patent ↗A stacked semiconductor memory device includes an interface chip and a plurality of core chips, in which the interface chip and the plurality of core chips are stacked. The core chips are mutually connected by a plurality of data through electrodes. The core chips each include a plurality of memory arrays. In response to an access request, the plurality of memory arrays corresponding to a predetermined data through electrode are activated, and the plurality of activated memory arrays and the predetermined data through electrode are sequentially connected. Thereby, even though it requires approximately ten-odd ns for transferring the first data, similarly to the conventional case, it is possible to transfer the subsequent data at high speed determined by the reaction rate (1 to 2 ns) of the through electrode. As a result, it becomes possible to increase a bandwidth while suppressing the number of through electrodes.
1. A method of controlling a stacked semiconductor memory device in which a plurality of core chips each having a plurality of memory arrays are stacked and the plurality of core chips are mutually connected by a plurality of data through electrodes, comprising:
a first step for activating, in response to an access request, the plurality of memory arrays corresponding to a predetermined data through electrode; and
a second step for sequentially connecting the activated memory arrays and the predetermined data through electrode.
2. The method of controlling a stacked semiconductor memory device as claimed in claim 1 , wherein at the first step, a plurality of memory arrays included in the same core chip are activated.
3. The method of controlling a stacked semiconductor memory device as claimed in claim 1 , wherein at the first step, a plurality of memory arrays included in different core chips are activated.
4. The method of controlling a stacked semiconductor memory device as claimed in claim 2 , wherein at the first step, a plurality of memory arrays included in different core chips are activated.
5. The method of controlling a stacked semiconductor memory device as claimed in claim 1 , wherein while data is successively transferred at the second step, a parity of the data is transferred via another data through electrode different from the predetermined data through electrode.
6. A method of controlling a semiconductor memory device in which a plurality of core chips each having a plurality of memory arrays are stacked and the plurality of core chips are mutually connected by a plurality of data through electrodes including first and second data through electrodes, comprising:
a first step for successively transferring a series of data via the first data through electrode; and
a second step for transferring, while the data is successively transferred at the first step, a parity of the data via the second data through electrode.
7. A method for a memory device including a plurality of memory chips each including a plurality of memory arrays and a through electrode, the memory chips being stacked with each other such that the through electrode of a lower one of the memory chips is connected to the through electrode of an upper one of the memory chips, the through electrodes of the memory chips being thereby electrically connected to each other to form a common electrode, the method comprising:
activating selected ones of the memory arrays of the memory chips; and
forming an electrical path between the common electrode and each of the selected ones of the memory arrays in sequence to perform a sequential data transfer between the common electrode and the selected ones of the memory arrays.
8. The method as claimed in claim 7 , wherein the selected ones of the memory arrays include at least one of the memory arrays of each of the memory chips.
9. The method as claimed in claim 7 , wherein the selected ones of the memory arrays include at least two of the memory arrays of at least one of the memory chips.
10. The method as claimed in claim 7 , wherein each of the memory chips further includes a plurality of switches each coupled between the through electrode and an associated one of the memory arrays, and the forming the electrical path is performed by turning the switches between the through electrode and the selected one of the memory arrays on in sequence.
11. The method as claimed in claim 10 , wherein each of the switches is controlled to be turned ON and OFF in response to an associate one of the activation signals and an associated one of the selection signals supplied thereto.