Memory system having an encoding processing circuit for redundant encoding process

摘要

In one embodiment, a memory system for writing redundant data output by an encoding processing circuit, comprises a memory, a encoding processing circuit, and a decoding circuit. The memory is electrically rewritable by using memory cells. The memory cells are capable of having two different resistance values corresponding to logical values of 1 or 0 respectively. The redundant data is read from and a predetermined logical value is written to the memory by flowing current in a same direction. The encoding processing circuit performs redundant encoding processing on target data and outputs redundant data. A number of bits having the predetermined logical value exceeds a number of bits having the logical value other than the predetermined logical value, for writing the redundant data to the memory. A decoding circuit reads data from the memory, and performs a decoding process on the data.

主权项

1. A memory system for writing redundant data output by an encoding processing circuit, comprising:
a memory, electrically rewritable by using memory cells capable of having two different resistance values corresponding to logical values of 1 or 0 respectively, the redundant data is read from the memory and a predetermined logical value is written to the memory by flowing current in a same direction; the encoding processing circuit performs redundant encoding processing on target data and outputs redundant data, a number of bits having the predetermined logical value exceeds a number of bits having the logical value other than the predetermined logical value, for writing the redundant data to the memory; and a decoding circuit that reads data from the memory, and performs a decoding process on the data.