Memory module that is capable of controlling input/output in accordance with type of memory chip
View Patent ↗A memory module of the present invention is provided with a memory core chip that is placed between an interface chip and an interposer chip and has a relay wire for electrically connecting these chips, an interposer chip that transmits type-information, that is information showing the type of the memory core chip, to the interface chip through the relay wire, and the interface chip that controls the memory core chip in accordance with the type-information received from the interposer chip.
1. A memory module having a memory core chip stored with information, an interface chip for controlling input and output of data of said memory core chip, and an interposer chip for transmitting and receiving said data between said interface chip and an outside:
wherein said memory core chip is placed between said interface chip and said interposer chip and has a relay wire for electrically connecting said interface chip and said interposer chip;
wherein said interposer chip transmits type-information, that is information showing a type of said memory core chip, to said interface chip through said relay wire; and
wherein said interface chip controls said memory core chip in accordance with said type-information received from said interposer chip.
2. The memory module according to claim 1 , wherein a plurality of said memory core chips is layered and a through-electrode is used as said relay wire.
3. The memory module according to claim 2 , wherein said plurality of memory core chips includes a first memory core chip and a second memory core chip that is different from said first memory core chip, and wherein said type-information indicates whether said first memory core chip or said second memory core chip is to be used.
4. The memory module according to claim 1 , wherein said type-information is a data bus width.
5. The memory module according to claim 4 , wherein said type-information includes at least one bit of information showing a type of said data bus width, and wherein said interface chip is previously stored with the type of said data bus width in accordance with said type-information.
6. The memory module according to claim 5 , wherein said interposer chip includes:
a power supply potential terminal to which a power supply potential is supplied from the outside, and a ground potential terminal that is connected to a ground potential on the outside;
a setting wire that is connected to said power supply potential terminal or said ground potential terminal in accordance with said type-information while a potential is selected from among said power supply potential and said ground potential based on said one bit of information that has been created; and
an electrode for connecting said setting wire to said relay wire.
7. The memory module according to claim 6 , wherein said interposer chip includes a terminal for detecting an electric potential showing said type-information.
8. The memory module according to claim 4 , wherein said relay wire of said memory core chip is arranged so as to correspond to a maximum value of said data bus width, and wherein said interposer chip includes a terminal for inputting and outputting said data from/to the outside and for supporting the maximum value of said data bus width.
9. The memory module according to claim 1 , wherein said interposer chip includes a terminal for receiving said type-information from the outside.
10. The memory module according to claim 1 , further comprising a conversion layer between said interface chip and said memory core chip, for electrically connecting an electrode of the interface chip and said relay wire of the memory core chip.
11. The memory module according to claim 1 , further comprising a conversion layer between said interface chip and said memory core chip.
12. The memory module according to claim 1 , wherein said relay wire comprises a plurality of through electrodes.
13. The memory module according to claim 12 , wherein said plurality of through electrodes comprises electrodes that are not connected to an internal circuit of said memory core chip and electrodes that are connected to the internal circuit of said memory core chip.
14. The memory module according to claim 13 , wherein said electrodes that are not connected to the internal circuit of said memory core chip input and output a control signal and data to and from the outside of the memory module.
15. The memory module according to claim 13 , wherein said electrodes that are connected to the internal circuit of said memory core chip transmit a signal and data to another chip.
16. The memory module according to claim 13 , wherein said electrodes that are not connected to the internal circuit of said memory core chip relay a signal and data between said interface chip and said interposer chip.
17. The memory module according to claim 1 , wherein said interface chip is laid over said memory core chip so that a circuit information surface of said interface chip is on a side of a circuit information surface of said memory core chip.