Semiconductor memory device and information processing system including the same
View Patent ↗The semiconductor memory device includes plural core chips that are allocated with different chip identification information from each other and an interface chip that controls the plural core chips. The interface chip receives address information to specify memory cells and commonly supplies a part of the address information as chip selection information for comparison with the chip identification information to the plural core chips. As a result, since the controller recognizes that an address space is simply enlarged, the same interface as that in the semiconductor memory device according to the related art can be used.
1. A semiconductor device comprising:
a plurality of chips stacked with one another, each of the semiconductor chips including a first storage circuit storing an individual chip address allocated thereto and a second storage circuit, each of the semiconductor chips being configured to receive a row command accompanying a first layer address and to receive a column command accompanying a second layer address, the individual chip address comprising first and second parts,
wherein each of the semiconductor chips is configured to execute the row command when the first part of the individual chip address is coincident with the first layer address accompanied by the row command, to store hit information into the second storage circuit in response to execution of the row command, and to execute the column command when the second storage circuit maintains the hit information and the second part of the individual chip address is coincident with the second layer address accompanied by the column command.
2. The semiconductor device as claimed in claim 1 , wherein:
each of the semiconductor chips is free from receiving the second layer address when each of the semiconductor chips receives the row command, and
each of the semiconductor chips is free from receiving the first layer address when each of the semiconductor chips receives the column command.
3. The semiconductor device as claimed in claim 1 , wherein each of the semiconductor chips is configured to be free from execution of the row command when the first part of the individual chip address is not coincident with the first part of the layer address.
4. The semiconductor device as claimed in claim 3 , wherein each of the semiconductor chips is configured to be free from storing the hit information into the second storage circuit in response to being free from execution of the row command.
5. The semiconductor device as claimed in claim 1 , wherein each of the semiconductor chips is configured to be free from execution of the column command in response to an absence of the hit information even when the second part of the individual chip address is coincident with the second layer address accompanied by the column command.
6. The semiconductor device as claimed in claim 1 , wherein each of the semiconductor chips is configured to be free from execution of the column command when the second storage circuit maintains the hit information and the second part of the individual chip address that is not coincident with the second layer address accompanied by the column command.
7. The semiconductor device as claimed in claim 1 , wherein each of the semiconductor chips is configured to reset the hit information stored in the second storage circuit in response to, the pre-charge command.
8. The semiconductor device as claimed in claim 1 , wherein each of the semiconductor chips includes a first terminal receiving the first layer address and a second terminal receiving the second layer address, the first and second terminals being electrically independent of each other.
9. The semiconductor device as claimed in claim 8 , wherein the first terminal of each of the semiconductor chips is free from receiving the first layer address when the second terminal of each of the semiconductor chips receives the second layer address and the second terminal of each of the semiconductor chips is free from receiving the second layer address when the first terminal of each of the semiconductor chips receives the first layer address.
10. The semiconductor device as claimed in claim 8 , wherein each of the semiconductor chips includes:
a first comparing circuit coupled to the first terminal and the first storage circuit, and being configured to perform a first comparison between the first layer address and the first part of the individual chip address;
a second comparing circuit coupled to the second terminal and the first storage circuit, and being configured to perform a second comparison between the second layer address and the second part of the individual chip address;
a row control circuit coupled to the first comparing circuit and being controlled in response to a result of the first comparison irrespective of a result of the second comparison,
wherein each of the semiconductor chips stores the hit information into the second storage circuit in response to the result of the first comparison.
11. The semiconductor device as claimed in claim 10 , wherein each of the semiconductor chips further includes a column control circuit coupled to the second comparing circuit and the second storage circuit, the column control circuit being controlled in response to both the hit information and the result of the second comparison irrespective of the result of the first comparison.
12. A method comprising:
issuing a row command in common to a plurality of semiconductor chips stacked with one another, the row command accompanying a first layer address, each of the semiconductor chips storing an individual chip address allocated thereto, the individual chip address including first and second parts; and
issuing a column command in common to the semiconductor chips, the column command accompanying a second layer address,
wherein the issuing of the row command causes each semiconductor chip to compare the first layer address with the first part of the individual chip address and causes two or more semiconductor chips, the first part of each of the individual chip addresses of which is coincident with the first layer address, to execute the row command, and
wherein the issuing the column command causes each of at least the two or more semiconductor chips to compare the second layer address with the second part of the individual chip address and causes one of the two or more semiconductor chips, the second part of the individual chip address of which is coincident with the second layer address, to execute the column command.
13. The method as claimed in claim 12 , wherein the issuing of the row command causes remaining semiconductor chips other than the two or more semiconductor chips, the first part of each of the individual chip addresses of which is not coincident with the first layer address, to be free from executing the row command.
14. The method as claimed in claim 12 , wherein the issuing of the column command causes another of the two or more semiconductor chips, the second part of the individual chip address of which is not coincident with the second layer address, to be free from executing the column command.
15. The method as claimed in claim 12 , wherein the issuing of the column command causes remaining semiconductor chips other than the two or more semiconductor chips, the first part of each of the individual chip addresses of which is not coincident with the first layer address, to be free from executing the column command even when the second part of each of the individual chip addresses of the remaining semiconductor chips is coincident with the second layer address.