Intel Corporation

Zenith Data Systems Corporation

Packard Bell Nec

Puthiya K Nizar

William A Stevens, Jr

Ajay V Bhatt

Jeff C Morriss

Sudarshan Bala Cadambi

Shaun Knoll

Richard M Haslam

William S Wu

Suresh K Marisetty

Norman J Rasmussen

Andrew M Volk

Michael W Williams

Thomas F Joyce

Jian-Kuo Shen

Chester M Nibby, Jr

Jeffrey S Somers

Bruno DiPlacido, Jr

Thomas L Murray, Jr

Michelle A Pence

James F Bertone

G Lewis Steiner

Marc Sanfacon

Lance J McNally

Martin Massucci

Zohar Bogin

Brian K Langendorf

Vincent E VonBokern

David J McDonnell

Jeff L Rabe

Shelagh Ann Callahan

Khong S Foo

Michael G LaTondre

Tom A Sutera

A memory translation hub comprising a memory channel interface, a memory bus interface, and a command generator coupled to the memory channel interface and to the memory bus interface. The memory channel interface receives a memory control packet from a memory channel. The memory bus interface provides a memory bus. The command generator causes the memory bus interface to provide memory control signals on the memory bus responsive to the memory control packet.

Method and apparatus for supporting SDRAM memory

A method and apparatus for configuring and/or initializing memory devices. A disclosed method initializes a memory controller and a plurality of memory controller configuration registers. Serial identification numbers are assigned to memory devices coupled to the memory controller. Additionally, groups of device identification numbers, which are based at least in part on the memory device sizes, are assigned to the memory devices, and the memory devices are enabled.

Method and apparatus for configuring and initializing a memory device and a memory channel

A method and apparatus for configuring memory devices. A disclosed bus controller includes a storage location and a control circuit. The control circuit is coupled to perform an initialization operation when a value indicating that initialization operation is stored in the storage location. The initialization operation is selected from one of a set of initialization operations that the control circuit is capable of performing.

Method and apparatus for configuring a memory device and a memory channel using configuration space registers

A method and system for extending t range of memory devices coupled to a memory devices is described. A first group of memory devices and a second group of memory devices are identified. The first group includes memory devices located close to a memory controller and the second group includes memory devices located a distance away from the memory controller. Commands to access memory devices in the first and second groups are sent. A command to the first group is sent with a transitional delay when the command to the first group follows a command to the second group. In response to the commands, data from the first and second groups is received.

Means to extend tTR range of RDRAMS via the RDRAM memory controller

A method for controlling device temperature. The method involves determining access rate to a component, comparing the access rate with a predetermined threshold modified by a weighted value and controlling the temperature of the component through corrective action.

Method and apparatus to control device temperature

A memory repeater hub comprising a main memory channel interface circuit, an expansion control channel interface circuit, and an expansion memory channel interface circuit. The main memory channel interface circuit receives a memory control packet and a memory data packet from a main memory channel. The expansion control channel interface circuit receives a first expansion control packet and a second expansion control packet from an expansion control channel. The expansion memory channel interface circuit selectively transmits the memory control packet to an expansion memory channel responsive to the first expansion control packet, and selectively transmits the memory data packet to the expansion memory channel responsive to the second expansion control packet.

Memory transceiver to couple an additional memory channel to an existing memory channel

According to one embodiment, the present invention discloses a method of managing power in a memory system. The memory system includes a plurality of memory devices. Each one of the memory devices is grouped in a first group or a second group. First, access to a memory device is requested. It is next determined whether the requested memory device is located in the first group. If the requested memory device is not located within the first group, it is determined whether the first group is filled to capacity. If the first group is not filled to capacity, the requested memory device is transferred to the first group. According to a further embodiment, each one of the memory devices grouped into the first group is further grouped in to a first subgroup or a second subgroup.

Method and apparatus for power management in a memory subsystem

One embodiment of the invention is a method for decoding a memory access address. A portion of the memory access address is compared to a plurality of boundary values, each of the plurality of boundary values representing an uppermost address for a group of memory devices, each of the memory devices in the group having the same configuration. A group number is generated that represents an addressed group that contains an addressed memory device that contains the memory access address. A device number is generated that represents the location of the addressed memory device within the addressed group. A device selection signal is generated responsive to the group number and the device number.

Method and apparatus for memory address decode in memory subsystems supporting a large number of memory devices

A method and apparatus for restoring a memory device channel when exiting a low power state. One method involves storing a set of memory initialization values from storage locations in a memory controller into a memory that maintains values during a power down state. The values may be necessary to access a system memory. When the power down state is exited, the values are restored to the storage locations in the memory controller.

Method and apparatus for restoring a memory device channel when exiting a low power state

A pipelined memory controller that includes a decode stage, and a schedule stage, wherein the schedule stage includes a command queue to store multiple commands. In one embodiment, the schedule stage further includes look ahead logic which can modify an order memory commands are stored in the command queue.

Method and apparatus for providing a pipelined memory controller

A symmetric multiprocessing system with a unified environment and distributed system functions provides unified address space for all functional units in the system while distributing the execution of various system functions over the functional units of the system whereby each functional unit assumes responsibility for its own aspects of these operations. In addition, the system provides improved system bus operation for transfer of data from memory.

Symmetric multiprocessing system with unified environment and

Circuitry and complementary logic are provided to a bus controller, a number of 1:n bus signal distributors, and a number of bus interfaces of an hierarchical bus assembly for conducting data communication transactions between bus agents interconnected to the hierarchical bus assembly. The hierarchical serial bus assembly is used to serially interface a number of isochronous and asynchronous peripherals to the system unit of a computer system. These circuitry and complementary logic of the serial bus elements implement a number of elemental packets and a number of transaction protocols, employing a master/slave model of transaction flow control. Data communication transactions are conducted using the elemental packets and in accordance to the transaction protocols. In some embodiments, these circuitry and complementary logic of the serial bus elements are also used to conduct connection management transactions between the serial bus elements. The connection management transactions are conducted in like manner as the data communication transactions.

M&A for exchanging date, status and commands over an hierarchical serial

Timing calculator means in a computer system are used to adaptively generate an appropriate access signal, to one of a plurality of memory types, based on first and second timing control values, wherein the first timing control value represents information specific to and limited to the start of a memory operation and wherein the second timing control value represents information representing other timing events. That is, the state machine of the present invention requires a distinct starting control value, separate from other timing values, for calculation of appropriate memory access parameters.

Growing community of inventors

El Dorado Hills, CA, United States of America

Puthiya K Nizar