Abstract: The present disclosure includes methods, devices, and systems for packet processing. One method embodiment for packet flow control includes deconstructing a transport layer packet into a number of link-control layer packets, wherein each of the link-control layer packets has an associated sequence number, communicating the number of link-control layer packets via a common physical connection for a plurality of peripheral devices, and limiting a number of outstanding link-control layer packets during the communication.

Abstract: The present disclosure includes methods for controlling host memory access with a memory device, systems, host controllers and memory devices. One embodiment for controlling host memory access with a memory device includes receiving at least one command from a host and controlling execution of the at least one command with the memory device.

Abstract: The present disclosure includes methods, devices, and systems for dealing with threshold voltage change in memory devices. A number of embodiments include an array of memory cells and control circuitry having sense circuitry coupled to the array. The control circuitry is configured to determine changes in threshold voltages (Vts) associated with the memory cells without using a reference cell, and adjust the sense circuitry based on the determined changes and without using a reference cell.

Abstract: A controller circuit is coupled to a memory device over a data/IO bus and a control bus. The controller circuit generates a read enable signal that is transmitted to the memory device to instruct the memory device to drive data onto the data/IO bus. The read enable signal is fed back to the controller circuit that then uses the fed back signal to read the data from the data/IO bus.

Abstract: Methods and apparatus for managing data storage in hybrid memory devices utilizing single level and multi level memory cells. Logical addresses can be distributed between single level and multilevel memory cells based on a frequency of write operations performed. Initial storage of data corresponding to a logical address in memory can be determined by various methods including initially writing all data to single level memory or initially writing all data to multilevel memory. Other methods permit a host to direct logical address writes to single level or multilevel memory cells based on anticipated usage.

Abstract: Controllers and memory devices are provided. In an embodiment, a controller is configured to address a non-defective column of memory cells of a memory device in place of a defective column of memory cells of the memory device in response to receiving an address of the defective column of memory cells from the memory device. In another embodiment, a memory device has columns of memory cells and is configured to receive an external address that addresses a non-defective column of memory cells of a sequence of columns of memory cells of the memory device in place of a defective column of memory cells of the sequence of columns of memory cells such that the non-defective column replaces the defective column. The non-defective column is a proximate non-defective column following the defective column in the sequence of columns that is available to replace the defective column.

Abstract: Methods and apparatus for managing data storage in memory devices utilizing memory arrays of varying density memory cells. Data can be initially stored in lower density memory. Data can be further read, compacted, conditioned and written to higher density memory as background operations. Methods of data conditioning to improve data reliability during storage to higher density memory and methods for managing data across multiple memory arrays are also disclosed.

Abstract: Memory devices, connectors and methods for terminating an operation are provided, including a memory device configured to terminate an internal operation such as a programming or erase operation responsive to receiving a signal during removal of the memory device from a connector, such as a socket. The memory device may be configured to generate the removal signal, such as by including a dedicated removal terminal. The memory card may respond to the signal by terminating a programming or erase operation before power is lost. The removal terminal may have a dimension that is different from a dimension of a power terminal. Alternatively, the connector may be configured to generate a signal that causes a host to terminate programming or erase operations prior to memory card removal, such as by including a switch that is actuated when the memory device moves to a pre-power loss position.

Abstract: The present disclosure includes methods, devices, and systems for state change in systems having devices coupled in a chained configuration. A number of embodiments include a host and a number of devices coupled to the host in a chained configuration. The chained configuration includes at least one device that is not directly coupled to the host. The at least one device that is not directly coupled to the host is configured to change from a first communication state to a second communication state responsive to receipt of a command from the host.

Abstract: Methods of operating memories facilitate compensating for memory cell signal line propagation delays, such as to increase the overall threshold voltage range and non-volatile memory cell states available. Methods include selecting a memory cell signal line of a memory and characterizing the memory cell signal line by determining an RC time constant of the memory cell signal line.

Abstract: The present disclosure includes methods, devices, and systems for device to device flow control. In one or more embodiments, a system configured for device to device flow control includes a host and a chain of devices, including one or more memory device, coupled to each other and configured to communicate with the host device through a same host port. In one or more embodiments, at least one device in the chain is configured to regulate the flow of data by sending a token in downstream data packets, the token allowing devices downstream from the respective at least one device to send an upstream data packet to the respective at least one device.

Abstract: The present disclosure includes methods, devices, and systems for booting in systems having devices coupled in a chained configuration. One or more embodiments include a host and a number of devices coupled to the host in a chained configuration, wherein at least one of the number of devices is a bootable device and the at least one bootable device is not directly coupled to the host.

Abstract: Apparatus and methods store error recovery data in different dimensions of a memory array. For example, in one dimension, block error correction codes (ECC) are used, and in another dimension, supplemental error correction codes, such as convolutional codes, are used. By using separate dimensions, the likelihood that a defect affects both error recovery techniques is lessened, thereby increasing the probability that error recovery can be performed successfully. In one example, block error correction codes are used for data stored along rows, and this data is stored in one level of multiple-level cells of the array. Supplemental error correction codes are used for data stored along columns, such as along the cells of a string, and the supplemental error correction codes are stored in a different level than the error correction codes.

Abstract: Apparatus and methods store stream-based error recovery data for a memory array, such as a NAND flash array. Conventionally, data is block coded per industry specification and stored in the memory array. Within the limits of the block code, this technique provides for correction of errors. By applying a stream-based inner code, that is, concatenating the outer block code with an outer code, the error correction can be further enhanced, enhancing the reliability of the device. This can also permit a relatively small-geometry device to be used in a legacy application.

Abstract: The present disclosure includes methods, devices, and systems for packet processing. One method embodiment for packet flow control includes deconstructing a transport layer packet into a number of link-control layer packets, wherein each of the link-control layer packets has an associated sequence number, communicating the number of link-control layer packets via a common physical connection for a plurality of peripheral devices, and limiting a number of outstanding link-control layer packets during the communication.

Abstract: Apparatus and methods are disclosed, such as those that store data in a plurality of non-volatile integrated circuit memory devices, such as NAND flash, with convolutional encoding. A relatively high code rate for the convolutional code consumes relatively little extra memory space. In one embodiment, the convolutional code is spread over portions of a plurality of memory devices, rather than being concentrated within a page of a particular memory device. In one embodiment, a code rate of m/n is used, and the convolutional code is stored across n memory devices.

Abstract: The present disclosure includes methods, devices, and systems for adjusting sensing voltages in devices. One or more embodiments include memory cells, and a controller configured to perform a sense operation on the memory cells using a sensing voltage to determine a quantity of the memory cells having a threshold voltage (Vt) greater than the sensing voltage and adjust a sensing voltage used to determine a state of the memory cells based, at least partially, on the determined quantity of memory cells.

Abstract: The present disclosure includes methods for controlling host memory access with a memory device, systems, host controllers and memory devices. One embodiment for controlling host memory access with a memory device includes receiving at least one command from a host and controlling execution of the at least one command with the memory device.

Abstract: The present disclosure includes methods, devices, and systems for device to device flow control. In one or more embodiments, a system configured for device to device flow control includes a host and a chain of devices, including one or more memory device, coupled to each other and configured to communicate with the host device through a same host port. In one or more embodiments, at least one device in the chain is configured to regulate the flow of data by sending a token in downstream data packets, the token allowing devices downstream from the respective at least one device to send an upstream data packet to the respective at least one device.

Abstract: Methods, devices, modules, and systems for programming memory cells can include storing charges corresponding to a data state that represents an integer number of bits in a set of memory cells. Programming memory cells can include storing a charge in a cell of the set, where the charge corresponds to a programmed state, where the programmed state represents a fractional number of bits, and where the programmed state denotes a digit of the data state as expressed by a number in base N, where N is equal to 2B, rounded up to an integer, and where B is equal to the fractional number of bits represented by the programmed state.