Patent ID: 8001337
Filing Date: 2011-08-16
Classification: G06F,G11C,Y02D

Abstract:
1. A memory system comprising: a first nonvolatile memory to store user data; a second nonvolatile memory to store management data; and a controller to control read/write of data with respect to the first and second nonvolatile memories, the controller being configured to prevent given management data from being written into the second nonvolatile memory when a write operation or an erase operation of user data is executed with respect to the first nonvolatile memory, wherein: a reverse flag of one bit is allotted to write data of a plurality of bits, the reverse flag being indicative of reverse of the write data, and the reverse flag is used when the number of bits to be changed is larger than the number of bits not to be changed with respect to data to be written to the second nonvolatile memory.