Memory system performing error correction of address mapping table and method of controlling same

Abstract

A memory system performing error correction of an address mapping table and a method of controlling the same are provided. A memory system includes a nonvolatile memory device, a dynamic random accessmemory (DRAM) configured to store an address mapping table for an access to the nonvolatile memory device, and a controller configured to store, in the DRAM, the address mapping table that is dividedin units of address mapping data, each of the units having a size of an interface of the DRAM, read, from the stored address mapping table, target address mapping data corresponding to a logical address that is received from a host, the target address mapping data including a target parity and physical addresses of the nonvolatile memory device, and perform an error correction on the read targetaddress mapping data, using the target parity.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2016-0147679 filed on November 7, 2016 at the Korean Intellectual Property Office, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] Apparatuses consistent with example embodiments relate to a semiconductor memory device, and more particularly, to a memory system that performs error correction of an address mapping table. Background technique [0003] Semiconductor memory devices are broadly classified into volatile memory devices and nonvolatile memory devices. Volatile memory devices have high read and write speeds, but data stored therein disappear when power is interrupted. In contrast, nonvolatile memory devices retain data stored therein even if external power is interrupted. Therefore, a nonvolatile memory device is used to store information that is retained regardless of whether power is supplied. As a nonvolatile memory, flash memory is m...

AI Technical Summary

Problems solved by technology

Volatile memory devices have fast read and write speeds, but data stored in them disappear when power is interrupted

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