摘要:
One embodiment relates to a memory structure that includes a bank group and a port emulation circuit module. The bank group includes a plurality of memory banks, each memory bank having one read port and one write port. The port emulation circuit module provides a group read/write port and a group read port for the bank group. The port emulation circuit module includes a port emulation control circuit that receives control signals including a first address for a group read/write port and a second address for a group read port, a first data path circuit for the group read/write port, and a second data path circuit for the group read port, wherein the second data path circuit outputs a second read data. Other embodiments and features are also disclosed.
摘要:
A memory system includes a memory controller with a plurality N of memory-controller blocks, each of which conveys independent transaction requests over external request ports. The request ports are coupled, via point-to-point connections, to from one to N memory devices, each of which includes N independently addressable memory blocks. All of the external request ports are connected to respective external request ports on the memory device or devices used in a given configuration. The number of request ports per memory device and the data width of each memory device changes with the number of memory devices such that the ratio of the request-access granularity to the data granularity remains constant irrespective of the number of memory devices.
摘要:
System on a Chip (SoC) devices include two packetized memory buses for conveying local memory packets and system interconnect packets. In an in-situ configuration of a data processing system two or more SoCs are coupled with one or more hybrid memory cubes (HMCs). The memory packets enable communication with local HMCs in a given SoC's memory domain. The system interconnect packets enable communication between SoCs and communication between memory domains. In a dedicated routing configuration each SoC in a system has its own memory domain to address local HMCs and a separate system interconnect domain to address HMC hubs, HMC memory devices, or other SoC devices connected in the system interconnect domain.
摘要:
Systems, methods, and computer programs are disclosed for managing access requests to a DRAM memory device. One embodiment includes receiving memory access pattern data for at least one of a plurality of memory clients prior to a corresponding memory transaction with a DRAM memory device. Next, it is determined, based on the received memory access pattern data, that a future transaction of a first of the plurality of memory clients may create a future page conflict with a current transaction of a second of the plurality of memory clients. The future page conflict is then resolved by interleaving access to an associated bank in the DRAM memory device by the first and second memory clients according to the received memory access pattern data.
摘要:
Embodiments disclosed herein include methods and apparatuses for pre-charging bitlines in a static random access memory (SRAM) prior to data access for reducing leakage power. The memory access logic circuit receives a memory access request comprising a data entry address to be accessed in a first data access path of a SRAM data array of the SRAM. The SRAM also includes a pre-charge circuit provided in a second data access path outside the first data access path. The pre-charge circuit is configured to enable pre-charging of the SRAM data array as part of the memory access request to avoid pre-charging bitlines in the SRAM data array during idle periods to reduce leakage power. The pre-charge circuit can enable pre-charging of the SRAM data array prior to data access such that the pre-charge circuit does not add latency to the first data access path.
摘要:
A multi-processor computer architecture incorporating distributed multi-ported common memory modules wherein each of the memory modules comprises a control block functioning as a cross-bar router in conjunction with one or more associated memory banks or other data storage devices. Each memory module has multiple I/O ports and the ability to relay requests to other memory modules if the desired memory location is not found on the first module. A computer system in accordance with the invention may comprise memory module cards along with processor cards interconnected using a baseboard or backplane having a toroidal interconnect architecture between the cards.
摘要:
An integrated circuit with hazard prediction and prevention circuitry is provided. The hazard prediction circuitry may predict a future hazard condition between two periodic signals, and the hazard prevention circuitry may selectively delay at least one of the two periodic signals to avoid the predicted hazard condition. Single-port memory cells may provide multiport memory functionality using an arbitration circuit that includes the hazard prediction and prevention circuitry and receives memory access requests from at least two request generators. The arbitration circuit may operate in synchronous mode and perform port selection based on a predetermined logic table. The arbitration circuit may also operate in asynchronous mode and execute a memory access request as soon as it is received by the arbitration circuit. Metastability caused by receiving memory access requests at the same time from at least two request generators may be avoided with the hazard prediction and prevention circuitry.
摘要:
A memory arrangement (200) includes a plurality of memory blocks (208), a first group of access ports (204), and a second group of access ports (206). Routing circuitry (209) couples each pair of the first and second groups of access ports to a respective one of the memory blocks. Each pair includes a first access port from the first group and a second access port from the second group. The first access port has write access to a first portion of the respective memory blocks but not to a second portion of the memory block, and has read access to the second portion but not to the first portion. The second access port has write access to the second portion but not to the first portion, and has read access to the first portion but not to the second portion.