摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A bus controller, a number of 1:n bus signal distributors, and a number of bus interfaces are provided for form an hierarchical serial bus assembly for serially interfacing a number of isochronous and asynchronous peripherals to the system unit of a computer system. The bus controller, bus signal distributors, and bus interfaces are provided with circuitry and complementary logic for implementing a master/slave model of flow control for serially interfacing the bus agents to each other to conduct data communication transactions. In certain embodiments, these circuitry and complementary logic further conduct connection management transactions employing also the master/slave model of flow control, implement a frame based polling schedule for polling the slave "devices", employ at least two address spaces to conduct the various transactions, support communication packet based transactions, and/or electrically represent data and/or control states.