Netlist, Inc.

International Business Machines Corporation

Agere Systems Inc.

Other

Lucent Technologies Inc.

At+t Corp.

At&t Bell Laboratories

Agere Systems Guardian Corp.

At&t Ipm Corp.

Svic No. 28 New Technology Business Investment L.l.p.

Hyun K Lee

Jayesh R Bhakta

Anthony K Stamper

Jeffrey C Solomon

Chi-She Chen

Mario Jesus Martinez

Thomas L McDevitt

Soonju Choi

Edward Crandal Cooney, Iii

Stephen Ellinwood Luce

David Wayne Potter

Junkil Ryu

Jeffrey P Gambino

Kwong Hon Wong

Scott H Milton

Chi She Chen

Trevor Edward Little

Jeffery C Solomon

Hao Le

Soon J Choi

Baozhen Li

Paul E Bakeman, Jr

John Susantha Fernando

Shaun Patrick Whalen

Lloyd G Burrell

John E Heidenreich, Iii

Mark D Levy

Sally J Yankee

Michael James Hunter

Edward E Cooney, Iii

Mark Yeen Luong

Lai Q Pham

Bruce Bennett Doris

Chung H Lam

Jed Hickory Rankin

Herbert Lei Ho

Bomy A Chen

Yun-Yu Wang

Mark Hoinkis

Rebecca D Mih

Ernest N Levine

Glenn A Biery

Thomas H Ivers

Steve Donald Holmes

David Andrew Inglis

Steven H Boettcher

Kevin M Houlihan

Edward Paul Barth

Ann H McDonald

Dennis Hoyniak

Han Nguyen

Jay G Harrington

Paul T Holler, Jr

Sheng Wang

A node in a network including a plurality of nodes comprises persistent memory; non-persistent memory, a node control device operatively coupled to the persistent memory and the non-persistent memory, a local interface for interfacing with the local server in the UMA node, and a network interface for interfacing with other nodes. The node control device is configured to translate between a local unified memory access (UMA) address space accessible by applications running on a local server and a global UMA address space that is mapped to a physical UMA address space. The physical UMA address space includes physical address spaces associated with different UMA nodes in the cluster of UMA nodes. Thus, a server in the UMA network can access the physical address spaces at other UMA nodes without going through the servers in the other UMA nodes.

Method and apparatus for uniform memory access in a storage cluster

A DRAM packages comprises stacked array dies including at least a first array die and a stacked over at least the first array die, data terminals, via which the DRAM package receives or outputs data signals, first data interconnects between respective ones of the data terminals and the first array die, and second data interconnects distinct from the first data interconnects and between respective ones of the data terminals and the second array die. The DRAM package further comprises drivers configured to drive first data signals to the first array die via the first data interconnects and second data signals to the second array die via the second data interconnects. A first data signal is driven by one or more drivers having a first driver size, and a second data signal is driven by one or more drivers having a second driver size different from the first driver size.

Memory package having stacked array dies and reduced driver load

A memory module is operable in a computer system having a memory controller and a system bus and comprises memory devices organized in one or more ranks and in a plurality of groups, and circuits configurable to receive from the memory controller a system clock and input control and address (C/A) signals, and output registered C/A signals and buffer control signals. The memory module further comprises a plurality of buffer circuits. In response to the buffer control signals, each buffer circuit is configured to communicate first data/strobe signals with at least one memory device and to communicate second data/strobe signals with the memory controller. The buffer circuit includes at least one delay circuit configured to delay at least one signal of the first data/strobe signals based on a first delay and a second delay. A respective local clock signal has a respective phase relationship with the module clock signal and is output to a corresponding group of the memory devices that includes at least one corresponding memory device in each of the one or more ranks.

Memory module with local synchronization and method of operation

A memory module comprises dynamic random access memory (DRAM) devices arranged in ranks, and a module controller configurable to receive address and control signals for a memory operation, and to output first module control signals to the DRAM devices, causing a selected rank to output or receive N-bit-wide data. The module controller is further configurable to output second module control signals to a plurality of data buffers coupled to the DRAM devices via module data lines. Each respective data buffer includes a n-bit-wide (n<N) data path and logic configurable to, in response to the second module control signals, enable the n-bit-wide data path to receive and regenerate signals carrying a respective n-bit-wide section of the N-bit-wide data communicated from/to a respective n-bit-wide section of the module data lines. The logic is further configurable to disable the n-bit-wide data path when the memory module is not being accessed for data.

Memory module with distributed data buffers

According to certain aspects, a memory subsystem is coupled to a memory controller of a host computer system via an interface. The memory subsystem comprises dynamic random access memory elements and a memory subsystem controller. During a normal memory read or write operation, the memory subsystem controller is configured to receive address and command signals associated with the memory read or write operations and to control the dynamic random access memory elements in accordance with the address and command signals. The memory subsystem controller is further configured to output via the open drain output a parity error signal in response to a parity error having occurred during the memory read or write operation. During an initialization operation, the memory subsystem controller is configured to output via the open train output a signal related to one or more parts of initialization operation sequences.

Memory module having open-drain output for error reporting and for initialization

A memory module is operable in a computer system to communicate data with a system memory controller via a system memory bus. The memory module comprises a plurality of memory devices mounted on a circuit board, a data module mounted on the circuit board and coupled between the plurality of memory devices and the system memory bus, and a control circuit mounted on the circuit board and coupled to the data module, the plurality of memory devices, and the system memory bus. The data module includes a plurality of data handlers in a plurality of integrated circuits. The memory module is operable in any of a plurality of modes, including a first mode and a second mode. The plurality of memory devices in the first mode is accessed by the system memory controller for normal memory read or write operations. The plurality of memory devices in the second mode communicate data signals with the data module while the memory module is not being accessed by the system memory controller for normal memory read or write operations.

Multi mode memory module with data handlers

The present application presents a Uniform Memory Access (UMA) network including a cluster of UMA nodes. A system in a UMA node comprises persistent memory; non-persistent memory, a node control device operatively coupled to the persistent memory and the non-persistent memory, a local interface for interfacing with the local server in the respective UMA node, and a network interface for interfacing with the UMA network. The node control device is configured to translate between a local unified memory access (UMA) address space accessible by applications running on a local server and a global UMA address space that is mapped to a physical UMA address space. The physical UMA address space includes physical address spaces associated with different UMA nodes in the cluster of UMA nodes. Thus, a server in the UMA network can access the physical address spaces at other UMA nodes without going through the servers in the other UMA nodes.

Uniform memory access in a system having a plurality of nodes

A memory module is operable in a memory system with a memory controller. The memory module comprises memory devices, a module control circuit, and a plurality of buffer circuits coupled between respective sets of data signal lines in a data bus and respective sets of the memory devices. Each respective buffer circuit is mounted on the module board and coupled between a respective set of data signal lines and a respective set of memory devices. Each respective buffer circuit is configured to receive the module control signals and the module clock signal, and to buffer a respective set of data signals in response to the module control signals and the module clock signal. Each respective buffer circuit includes a delay circuit configured to delay the respective set of data signals by an amount determined based on at least one of the module control signals.

Memory module with timing-controlled data buffering

A memory module comprises a volatile memory subsystem including DRAM, a non-volatile memory subsystem including Flash memory, and a module control device. The Flash memory includes main Flash providing a main Flash memory space and scratch Flash providing a scratch Flash memory space. The module control device is configured to receive a request from the memory controller to move one or more segments of data in a first Flash block in the main Flash to the DRAM and to, for each respective segment of data: select a respective set of pages in the DRAM; transfer respective data stored in the respective set of pages from the DRAM to a corresponding segment in the scratch Flash; and transfer the respective segment of data to the respective set of pages in the DRAM. Thus, data can be moved segment by segment between the DRAM and the Flash memory.

Memory module having volatile and non-volatile memory subsystems and method of operation

A memory module comprises a volatile memory subsystem, a non-volatile memory subsystem, and a module controller coupled to the volatile memory subsystem and to the non-volatile memory subsystem. The module controller is configurable to control data transfers between the volatile memory subsystem and the non-volatile memory subsystem. The module controller includes a data selection circuit configurable to pre-search data transferred from the non-volatile memory with respect to one or more search criteria before providing the pre-select data relevant to the one or more search criteria to the volatile memory subsystem.

Method and apparatus for presearching stored data

A memory module is operable in a memory system with a memory controller. The memory module comprises a module control device to receive command signals and a system clock from the memory controller and to output a module clock, module C/A signals and data buffer control signals. The module C/A signals are provided to memory devices organized in one or more ranks, while the data buffer control signals, together with the module clock, are provided to a plurality of buffer circuits corresponding to respective groups of memory devices and are used to control data paths in the buffer circuits. The plurality of buffer circuits include clock regeneration circuits to regenerate clock signals with programmable delays from the module clock. The regenerated clock signals are provided to respective groups of memory devices so as to locally sync the buffer circuits with respective groups of memory devices.

According to certain embodiments, a memory module is operable with a memory controller of a host system. The memory module includes a module controller configurable to receive address and control signals from the memory controller, and dynamic random access memory elements configurable to communicate data signals with the memory controller in accordance with the address and control signals. The module controller has an open-drain output and is configurable to drive the open-drain output with a first signal to indicate a parity error having occurred when the memory module is being accessed for a normal memory read or write operation. The module controller is further configurable to drive the open drain output with a second signal related to one or more training sequences when the memory module performs operations associated with the one or more training sequences and not associated with any normal memory read or write operations.

Memory module having an open-drain output for parity error and for training sequences

A memory system that has a multi-channel volatile memory subsystem is coupled to a non-volatile memory subsystem to provide independent, configurable backup of data. The volatile memory subsystem has one or more main memory modules that use a form of volatile memory such as DRAM memory, for which the NV subsystem provides selective persistent backup. The main memory modules are dual in-line memory modules or DIMMs using DDR SDRAM memory devices. The non-volatile memory subsystem (NV backup) includes an NV controller and non-volatile memory NVM. The NV backup can also include a memory cache to aid with handling and storage of data. In certain embodiments, the NV controller and the non-volatile memory are coupled to the one or more DIMM channels of the main memory via associated signal lines. Such signal lines can be, for example, traces on a motherboard, and may include one or more signal buses for conveying data, address, and/or control signals. The NV controller and the non-volatile memory can be mounted on the motherboard.

Non-volatile memory storage for multi-channel memory system

A memory module comprises a volatile memory subsystem configured to coupled to a memory channel in computer system and capable of serving as main memory for the computer system, a non-volatile memory subsystem providing storage for the computer system, and a module controller coupled to the volatile memory subsystem, the non-volatile memory subsystem, and the C/A bus. The module controller is configured to control intra-module data transfers between the volatile memory subsystem and the non-volatile memory subsystem. The module controller is further configured to monitor C/A signals on the C/A bus and schedule the intra-module data transfers in accordance with the C/A signals so that the intra-module data transfers do not conflict with accesses to the volatile memory subsystem by the memory controller.

Hybrid memory module and system and method of operating the same

A memory module comprises a volatile memory subsystem, a non-volatile memory subsystem, and a module control device. The module control device is configured to read data from the non-volatile memory subsystem in response to a set of signals received from the memory channel indicating a non-volatile memory access request to transfer the data from the non-volatile memory subsystem to the volatile memory subsystem, and to provide at least a portion of the data to the volatile memory subsystem in response to receiving a dummy write memory command including a memory address related to the non-volatile memory access request via the memory channel. The volatile memory subsystem is further configured to receive the dummy write memory command and to receive the at least a portion of the first data in response to the dummy write memory command.

Growing community of inventors

Lagrangeville, NY, United States of America

Hyun K Lee