Abstract:
A memory subsystem enables a refresh abort command. A memory controller can issue an abort for an in-process refresh command sent to a memory device. The refresh abort enables the memory controller to more precisely control the timing of operations executed by memory devices in the case where a refresh command causes refresh of multiple rows of memory. The memory controller can issue a refresh command during active operation of the memory device, which is active operation refresh as opposed to self-refresh when the memory device controls refreshing. The memory controller can then issue a refresh abort during the refresh, and prior to completion of the refresh. The memory controller thus has deterministic control over both the start of refresh as well as when the memory device can be made available for access.
Abstract:
Described herein are a method and an apparatus for dynamically switching between one or more finite termination impedance value settings to a memory input-output (I/O) interface of a memory in response to a termination signal level. The method comprises: setting a first termination impedance value setting for a termination unit of an input-output (I/O) interface of a memory; assigning the first termination impedance value setting to the termination unit when the memory is not being accessed; and switching from the first termination impedance value setting to a second termination impedance value setting in response to a termination signal level.
Abstract:
Techniques and mechanisms for determining a timing of a command to access a memory device resource. In an embodiment, a multi-cycle command which is exchanged from a memory controller to a memory device, wherein the multi-cycle command indicates an access to a bank of the memory device. Timing of the one or more other commands is controlled, based on the multi-cycle command, to enforce a time delay parameter which describes an operational constraint of the memory device. In another embodiment, timing of one or more commands is determined with reference to a beginning of a last cycle of a multi-cycle command.
Abstract:
Techniques and mechanisms for a memory device to concurrently receive and process signals each based on a different respective reference voltage level. In an embodiment, an input/output (I/O) interface of a memory device includes receiver circuits each to process a respective signal received via a corresponding signal line of a bus. In response to one or more configuration commands, a first receiver circuit is configured to process a first signal based on a first reference voltage level and a second receiver circuit is configured to process a second signal based on a second reference voltage level. In another embodiment, a memory controller sends the one or more configuration commands to such a memory device based on an evaluation of voltage swing characteristics each corresponding to a different respective signal line of a bus.
Abstract:
A system enables an alert signal test mode. The system has an alert signal line between the memory device and the memory controller. The memory device has a register that controls entry into the alert signal test mode. The memory controller sends a command to trigger the memory device to enter the alert signal test mode. In response to the commands, the memory device asserts the alert signal line with an alert signal in response to entry into the alert signal test mode.
Abstract:
A system can be designed with memory to operate in a low temperature environment. The low temperature memory can be customized for low temperature operation, having a gate stack to adjust a work function of the memory cell transistors to reduce the threshold voltage (Vth) relative to a standard memory device. The reduced temperature can improve the conductivity of other components within the memory, enabling increased memory array sizes, fewer vertical ground channels for stacked devices, and reduced operating power. Based on the differences in the memory, the memory controller can manage access to the memory device with adjusted control parameters based on lower leakage voltage for the memory cells and lower line resistance for the memory array.
Abstract:
A system can respond to detection or prediction of an uncorrectable error (UE) in memory based on fault-aware analysis. The fault-aware analysis enables the system to generate a determination of a specific hardware element of the memory that is faulty. In response to detection of an error, the system can correlate a hardware configuration of the memory device with historical data indicating memory faults for hardware elements of the hardware configuration. Based on a determination of the specific component that likely caused the UE, the system can identify a region of memory associated with the detected UE and mirror the faulty region to a reserved memory space of the memory device for access to data of the faulty region.
Abstract:
A memory device that performs internal ECC (error checking and correction) can treat an N-bit channel as two N/2-bit channels for application of ECC. The memory device includes a memory array to store data and prefetches data bits and error checking and correction (ECC) bits from the memory array for a memory access operation. The memory device includes internal ECC hardware to apply ECC, with a first group of a first half the data bits checked by a first half of the ECC bits in parallel with a second group of a second half of the data bits checked by a second half of the ECC bits.
Abstract:
A memory system has a configurable mapping of address space of a memory array to address of a memory access command. A controller provides command and enable information specific to a memory device. The command and enable information can cause the memory device to apply a traditional mapping of the command address to the address space, or can cause the memory device to apply an address remapping to remap the command address to different address space.
Abstract:
A memory is described. The memory includes row buffer circuitry to store a page. The page is divided into sections, wherein, at least one of the sections of the page is to be sequestered for the storage of meta data, and wherein, a first subset of column address bits is to: 1) define a particular section of the page, other than the at least one sequestered sections of the page, whose data is targeted by a burst access; and, 2) define a field within the at least one of the sequestered sections of the page that stores meta data for the particular section.