Load reduced memory module
First Claim
1. A memory module comprising:
- a data buffer component;
a circuit board comprising a plurality of device sites, the plurality of device sites being coupled to the data buffer component, wherein each device site, of the plurality of device sites, is a location on the circuit board at which at least one respective memory device is disposed; and
a command and address (CA) buffer component disposed on the circuit board, wherein the CA buffer component comprises;
a primary interface comprising a first pin to receive a local chip select (CS) signal and a second pin to receive a distant chip select (CS) signal; and
a secondary interface to select a first set of one or more of the plurality of device sites when the local CS signal is received on the first pin or a second set of one or more of the plurality of device sites when the distant CS signal is received on the second pin.
2 Assignments
0 Petitions
Accused Products
Abstract
The embodiments described herein describe technologies for memory systems. One implementation of a memory system includes a motherboard substrate with multiple module sockets, at least one of which is populated with a memory module. A first set of data lines is disposed on the motherboard substrate and coupled to the module sockets. The first set of data lines includes a first subset of point-to-point data lines coupled between a memory controller and a first socket and a second subset of point-to-point data lines coupled between the memory controller and a second socket. A second set of data lines is disposed on the motherboard substrate and coupled between the first socket and the second socket. The first and second sets of data lines can make up a memory channel.
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Citations
20 Claims
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1. A memory module comprising:
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a data buffer component; a circuit board comprising a plurality of device sites, the plurality of device sites being coupled to the data buffer component, wherein each device site, of the plurality of device sites, is a location on the circuit board at which at least one respective memory device is disposed; and a command and address (CA) buffer component disposed on the circuit board, wherein the CA buffer component comprises; a primary interface comprising a first pin to receive a local chip select (CS) signal and a second pin to receive a distant chip select (CS) signal; and a secondary interface to select a first set of one or more of the plurality of device sites when the local CS signal is received on the first pin or a second set of one or more of the plurality of device sites when the distant CS signal is received on the second pin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a memory module comprising a command and address (CA) buffer component, a data buffer component, and a circuit board comprising a plurality of device sites, each device site, of the plurality of device sites, being a location on the circuit board at which at least one respective memory device is disposed, the method comprising:
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receiving, at a first pin of a primary interface of the CA buffer component of a memory module, a local chip select (CS) signal; receiving, at a second pin of the primary interface, a distant chip select (CS) signal; when the local CS signal is received on the first pin, selecting on a secondary interface of the CA buffer component a first set of one or more of a plurality of device sites; and when the distant CS signal is received on the second pin, selecting a second set of one or more of the plurality of device sites. - View Dependent Claims (11, 12, 13)
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14. A memory module comprising:
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a circuit board comprising a plurality of device sites, wherein each device site, of the plurality of device sites, is a location on the circuit board at which at least one respective memory device is disposed; means for buffering data transferred to and from a plurality of device sites; means for receiving a local chip select (CS) signal; means for receiving a distant chip select (CS) signal; means for selecting a first set of one or more of the plurality of device sites when the local CS signal is received; and means for selecting a second set of one or more of the plurality of device sites when the distant CS signal is received. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification