CHAPTER 11

Basic DRAM Memory-Access Protocol

The basic structures of modern DRAM devices and memory system organizations have been described in previous chapters. This chapter continues the examination of the DRAM memory system with a discussion on a basic DRAM memory-access protocol. A DRAM memory-access protocol defines commands and timing constraints that a DRAM memory controller uses to manage the movement of data between itself and DRAM devices. The basic DRAM memory-access protocol described in this chapter is generic in nature, and it can be broadly applied to modern memory systems such as SDRAM, DDR SDRAM, DDR2 SDRAM, and DDR3 SDRAM memory systems. The examination of the generic DRAM memory-access protocol begins by focusing on basic ...

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