Storage device and method using parameters based on physical memory block location

摘要

A data storage device and methods of performing memory operations using location-based parameters are disclosed. A method includes identifying a set of parameter values associated with a physical block of a memory array on a memory die. The set of parameter values is identified based on a physical location of the physical block. A physical location may include an edge or a central region of the memory array or the memory die. The memory die may comprise a nonvolatile semiconductor memory (e.g., flash memory). Parameter values may include a size or a number of programming steps, pulse widths, maximum programming or erase voltages, reading or verify reference voltages, and parameters relating to error correction, among others, including time dependent parameters. A memory access operation, such as a reading, programming, or erasing operation, is initiated with respect to the physical block in accordance with the set of parameter values.

主权项

1. A method for operating a memory, the method comprising:
at a data storage device that includes a memory and a table configured to map a plurality of block identifiers to a plurality of parameter sets, performing:
reading data located at a first physical block of the memory to acquire a first parameter set that includes a first parameter value and a second parameter value, the first parameter value corresponding to a physical location-dependent parameter value that is at least partially based on a physical location of the first physical block within the memory and that is to be used in an error decoding operation, and the second parameter value corresponding to a time-dependent parameter value;adding an entry to the table, the entry corresponding to the first parameter set;tagging the first physical block to the entry;reading data from the first physical block according to the first parameter value and the second parameter value; andperforming the error decoding operation on the data using the first parameter value.