Circuit providing load isolation and memory domain translation for memory module
DC CAFCFirst Claim
1. A circuit configured to be mounted on a memory module so as to be electrically coupled to a plurality of double-data-rate (DDR) memory devices arranged in one or more ranks on the memory module, the memory module configured to be electrically coupled to a memory controller of a computer system so as to receive a set of input signals, comprising row address signals, column address signals, bank address signals, and chip-select signals, the set of input signals compatible with a system memory domain of the computer system, the circuit comprising:
- a logic element;
a register;
a phase-lock loop device configured to be operationally coupled to the plurality of DDR memory devices, the logic element, and the register,wherein the circuit is configurable to be responsive to the set of input signals by selectively isolating one or more loads of the DDR memory devices from the computer system, the circuit configurable to translate between the system memory domain of the computer system and a physical memory domain of the plurality of DDR memory devices, wherein the system memory domain has a first memory density per rank and the physical memory domain has a second memory density per rank less than the first memory density per rank.
4 Assignments
Litigations
3 Petitions
Accused Products
Abstract
A circuit is configured to be mounted on a memory module so as to be electrically coupled to a plurality of double-data-rate (DDR) memory devices arranged in one or more ranks on the memory module. The circuit includes a logic element, a register, and a phase-lock loop device. The circuit is configurable to respond to a set of input signals from a computer system to selectively isolate one or more loads of the plurality of DDR memory devices from the computer system and to translate between a system memory domain of the computer system and a physical memory domain of the plurality of DDR memory devices.
270 Citations
36 Claims
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1. A circuit configured to be mounted on a memory module so as to be electrically coupled to a plurality of double-data-rate (DDR) memory devices arranged in one or more ranks on the memory module, the memory module configured to be electrically coupled to a memory controller of a computer system so as to receive a set of input signals, comprising row address signals, column address signals, bank address signals, and chip-select signals, the set of input signals compatible with a system memory domain of the computer system, the circuit comprising:
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a logic element; a register; a phase-lock loop device configured to be operationally coupled to the plurality of DDR memory devices, the logic element, and the register, wherein the circuit is configurable to be responsive to the set of input signals by selectively isolating one or more loads of the DDR memory devices from the computer system, the circuit configurable to translate between the system memory domain of the computer system and a physical memory domain of the plurality of DDR memory devices, wherein the system memory domain has a first memory density per rank and the physical memory domain has a second memory density per rank less than the first memory density per rank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A circuit configured to be mounted on a memory module so as to be electrically coupled to a first double-data-rate (DDR) memory device having a first data signal line and a first data strobe line, to a second DDR memory device having a second data signal line and a second data strobe line, and to a common data signal line, the memory module configured to be electrically coupled to a memory controller of a computer system so as to receive a set of input signals comprising row address signals, column address signals, bank address signals, and chip-select signals, the set of input signals compatible with a system memory domain of the computer system, the circuit comprising:
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a logic element; a register; a phase-lock loop device configured to be operationally coupled to the first DDR memory device, the second DDR memory device, the logic element, and the register, wherein the circuit is configurable to be responsive to the set of input signals by selectively electrically coupling the first data signal line to the common data signal line and selectively electrically coupling the second data signal line to the common data signal line, the circuit configurable to translate between the system memory domain of the computer system and a physical memory domain of the memory module, wherein the system memory domain has a first memory density per memory device, and the physical memory domain has a second memory density per memory device less than the first memory density per memory device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A circuit configured to be mounted on a memory module so as to be electrically coupled to a plurality of double-data-rate (DDR) memory devices arranged in one or more ranks on the memory module, the memory module configured to be electrically coupled to a memory controller of a computer system so as to receive a set of input signals, comprising row address signals, column address signals, bank address signals, and chip-select signals, the set of input signals compatible with a system memory domain of the computer system, the circuit comprising:
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a logic element; a register; a phase-lock loop device configured to be operationally coupled to the plurality of DDR memory devices, the logic element, and the register, wherein the circuit is configurable to be responsive to the set of input signals by selectively isolating one or more loads of the DDR memory devices from the computer system, the circuit configurable to translate between the system memory domain of the computer system and a physical memory domain of the plurality of DDR memory devices, wherein the system memory domain is compatible with a first number of chip-select signals, and the physical memory domain is compatible with a second number of chip-select signals greater than the first number of chip-select signals. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A circuit configured to be mounted on a memory module so as to be electrically coupled to a first double-data-rate (DDR) memory device having a first data signal line and a first data strobe line, to a second DDR memory device having a second data signal line and a second data strobe line, and to a common data signal line, the memory module configured to be electrically coupled to a memory controller of a computer system so as to receive a set of input signals comprising row address signals, column address signals, bank address signals, and chip-select signals, the set of input signals compatible with a system memory domain of the computer system, the circuit comprising:
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a logic element; a register; a phase-lock loop device configured to be operationally coupled to the first DDR memory device, the second DDR memory device, the logic element, and the register, wherein the circuit is configurable to be responsive to the set of input signals by selectively electrically coupling the first data signal line to the common data signal line and selectively electrically coupling the second data signal line to the common data signal line, the circuit configurable to translate between the system memory domain of the computer system and a physical memory domain of the memory module, wherein the system memory domain is compatible with a first number of chip-select signals, and the physical memory domain is compatible with a second number of chip-select signals greater than the first number of chip-select signals. - View Dependent Claims (32, 33, 34, 35, 36)
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Specification