Patent ID: 7424648
Filing Date: 2008-09-09
Classification: G06F

Abstract:
1. A nonvolatile memory system comprising a nonvolatile memory device, and an access device that accesses said nonvolatile memory device to read user data in the nonvolatile memory device, wherein said nonvolatile memory device includes: a nonvolatile memory including a user data area into which user data are written and a management area which stores an error correcting code for performing error correction on the data written in said user data area; and a controller including an error correction circuit for correcting an error in user data read from said nonvolatile memory based on the error correcting code stored in said management area, which includes: an error correction read in which user data is read from said nonvolatile memory and the error correction is performed with the use of said error correction circuit if there is any error while the data is directly read if there is no error; and a raw data read in which the user data read from said nonvolatile memory is directly outputted without any correction, and wherein said access device reads user data in combination with said error correction read and said raw data read from the nonvolatile memory device.