DDR5的JEDEC规范， 供参考。This document defines the DDR5 SDRAM specification, including features, functionalities, AC and DC characteristics, packages, and ball/signal assignments. The purpose of this Standard is to define the minimum set of requirements for JEDEC compliant 8Gb through 32Gb for x4, x8, and x16 DDR5 SDRAM devices. This standard was created based on the DDR4 standards (JESD79-4) and some aspects of the DDR, DDR2, DDR3 & LPDDR4 standards (JESD79, JESD79-2, JESD79-3 & JESD209-4). Item 1848.99G.