Codes for high performance write and read processes in multi-level NVMs

Abstract

Multi-level memory cells are used in non-volatile memories in order to increase the storage density. Using multi-level cells, however, imposes higher read and write latencies limiting high speed applications. In this work we study the tradeoff between storage density and write/read performance using codes. The contributions are codes that give high-performance write and read processes with minimal reduction in storage density. We describe the codes, give an analytical treatment of their information rate and speed, and compare them with more basic access schemes and upper bounds.