This document defines the DDR2 SDRAM specification, including features, functionalities, ACand DC characteristics, packages, and ball/signal assignments. The purpose of this Specificationis to define the minimum set of requirements for JEDEC-compliant 256 Mb through 4 Gb for x4,x8, and x16 DDR2 SDRAM devices. This specification was created based on the DDRspecification (JESD79). Each aspect of the changes for DDR2 SDRAM operation wereconsidered and approved by committee ballot(s). The accumulation of these ballots were thenincorporated to prepare this JESD79-2 specification.
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