摘要:
According to one embodiment, a non-volatile semiconductor memory device comprises a memory cell array and a memory region. The memory cell array has a plurality of physical blocks. Each of the plurality of physical blocks includes a plurality of string units. Each string unit has a plurality of NAND strings that shares a plurality of word lines connected to a plurality of memory cells, respectively. The memory region is disposed to one of the plurality of physical blocks. Each of the plurality of string units configures a first logical block, and when the first logical block is failed, information of the first failed logical block is stored in a first region of the memory region.
摘要:
To control a read sequence of a nonvolatile memory device, a plurality of read sequences are set and the read sequences respectively correspond to operating conditions different from each other. The read sequences are performed selectively based on sequence selection rates respectively corresponding to the read sequences. Read latencies of the respective read sequences are monitored and the sequence selection rates are adjusted based on monitoring results of the read latencies.
摘要:
Examples of a multi-level memory with direct access are described. Examples include designating an amount of a non-volatile random access memory (NVRAM) for use as memory for a computer system. Examples also include designating a second amount of the NVRAM to for use as storage for the computing device. Examples also include re-designating at least a first portion of the first amount of NVRAM from use as memory to use as storage.
摘要:
One method for improving the utility of solid-state storage media within a solid state storage device includes referencing one or more storage media characteristics for a set of storage cells of the solid-state storage media. The method also includes determining a configuration parameter for the set of storage cells based on the one or more storage media characteristics. The method includes configuring the set of storage cells to use the determined configuration parameter. The configuration parameter includes a parameter of the set of storage cells modifiable by a module external to the solid-state storage device by way of an interface. The module external to the solid-state storage device includes a device driver executing on a host device.
摘要:
Methods, systems, and computer readable media for early detection of potential flash failures using an adaptive system level algorithm based on NAND program verify are disclosed. According to one aspect, a method for early detection of potential flash failures using an adaptive system level algorithm based on NAND program verify includes performing a program verify operation after a write to a non-volatile memory, where the program verify mechanism reports a pass or fail based on an existing measurement threshold value, and dynamically adjusting the measurement threshold value used by subsequent program verify operations based on the results of previous program verify operations.
摘要:
A semiconductor storage device has a nonvolatile semiconductor memory comprised from multiple storage areas, and a controller, which is coupled to the nonvolatile semiconductor memory. The controller (A) identifies a storage area state, which is the state of a storage area, (B) decides, based on the storage area state identified in the (A), a read parameter, which is a parameter for use when reading data from a storage area with respect to a storage area of this storage area state, and (C) uses the read parameter decided in the (B) with respect to a read-target storage area and reads data from this read-target storage area.
摘要:
Disclosed is an apparatus and method for determining memory cell bias information for use in memory operations. One or more memory die are selected from a group of memory die, and one or more memory blocks selected from the selected one or more memory die. A group of cells within the selected memory blocks are programmed and cycled. Bias values are generated based on comparing one or more program levels associated with respective wordlines with predetermined programming levels. The bias values are stored lookup table that is configured to be accessible at runtime by a memory controller for retrieval of the bias value during a memory operation.
摘要:
Systems, methods and/or devices are used to enable triggering a process to reduce declared capacity of a storage device in a multi-storage-device storage system. In one aspect, the method includes: (1) obtaining, for each storage device of a plurality of storage devices of the storage system, one or more metrics of the storage device, the storage device including non-volatile memory, (2) detecting a trigger condition for reducing declared capacity of the non-volatile memory of a respective storage device of the plurality of storage devices, the trigger condition detected in accordance with the one or more metrics of one or more storage devices, and (3) enabling an amelioration process associated with the detected trigger condition, the amelioration process to reduce declared capacity of the non-volatile memory of the respective storage device. In some embodiments, the respective storage device includes one or more flash memory devices.
摘要:
A method for manufacturing a semiconductor device with adjusted threshold is provided. In a semiconductor device including a semiconductor, a source or drain electrode electrically connected to the semiconductor, a first gate electrode and a second gate electrode between which the semiconductor is provided, a charge trap layer provided between the first gate electrode and the semiconductor, and a gate insulating layer provided between the second gate electrode and the semiconductor, a threshold is increased by trapping electrons in the charge trap layer by keeping a potential of the first gate electrode at a potential higher than a potential of the source or drain electrode for 1 second or more while heating. After the threshold adjustment process, the first gate electrode is removed or insulated from other circuits. Alternatively, a resistor may be provided between the first gate electrode and other circuits.
摘要:
According to one embodiment, a semiconductor storage device includes a nonvolatile semiconductor memory and a controller. The nonvolatile semiconductor memory includes a firmware area capable of storing firmware used to execute either a normal mode or an autorun test mode and a user area capable of storing user data. The controller reads the firmware from the nonvolatile semiconductor memory and determines whether the firmware has been set in either the normal mode or the autorun test mode. The controller repeats erasing, writing, and reading in each block in the user area using a cell applied voltage higher than a voltage used in a normal mode, and enters a block where an error has occurred as a bad block.