完整版JESD209-4-1 LPDDR4X 协议规范 JANUARY 2017 积分自动改为了15积分，现改为5积分。

Low Power DDR4 spec LPDDR4

LPDDR3 JEDEC官方specification； This document defines the LPDDR3 specification, including features, functionalities, ACand DC characteristics, packages, and ball/signal assignments. The purpose of this specification is to define the minimum set of requirements for JEDEC compliant 4 Gb through 32 Gb for x16 and x32 SDRAM devices. This specification was created using aspects of the following specifications: DDR2 (JESD79-2), DDR3 (JESD79-3), LPDDR (JESD209), and LPDDR2 (JESD209-2). Each aspect of the specification was considered and approved by committee ballot(s). The accumulation of these ballots was then incorporated to prepare the LPDDR3 specification.