NAND Flash Memories (Englisch)

Solid-State-Drives (SSDs) Modeling, Simulation Tools & Strategies
; 2017
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NAND Flash memories are the storage media used inside Solid State Drives (SSDs). Indeed, a single drive for enterprise applications can contain up to hundreds of Flash chips. Flash memories are non-volatile in the sense that they can retain the information even when powered off, but they wear out, i.e. their performances change over time and they have a limited lifetime. Therefore, taking time to learn the basics of the Flash technology is a necessary step for people who have to deal with SSDs. After an introduction about the matrix array, this chapter walks the reader through the NAND basic functionalities, i.e. program, erase, and read operations. The second part of the chapter is devoted to the digital interface of NAND memories, with a detailed description of the communication protocol, for both synchronous (DDR) and asynchronous (legacy) modes.

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