DDR4 SDRAM Unbuffered DIMM Design Specification JEDEC DDR4 UDIMM设计规范标准文档。

英文原版Apple iPod接口规格， 介绍了iPod扩展接口远程命令和响应协议，允许将 iPod 的用户界面转换为其它应用场景如，仪表板收音机、大屏幕显示器或方向盘安装的遥控器等汽车娱乐系统，至于iPod外置设备的基本硬件通信特性和软件接口协议请参照另一规范-iPod Accessory Protocol Interface Specification， 值得iPod开发者参考学习！

这个是蓝牙核心技术文档，详细介绍了蓝牙协议层的所有内容，对于蓝牙开发和学习必须要用的一个文档资料，我也是找了很久才发现的，现在小分分享给大家

MCTP_Base_Specification_1.3.0中英文版 Management_Component_Transport_Protocol_Base_Specification_1.3.0.pdf Management_Component_Transport_Protocol_Base_Specification_1.3.0_cn.pdf

PCIE协议3.0官方英文版

SMBus标准规范 1.1版 智能电池系统规格系统管理总线规范

CompactPCI Specification 3.0版本，设计CPCI板卡所需资料，CPCI 标准规范 ！

PCI_Express_M.2_Specification 最新版本规格书V1.1。 PCI SIG官方网站权威发布文件。 基于V1.0变更如下内容： Incorporated the following ECNs:  Transition of NFC Signals from 3.3V to 1.8V ECN  M.2 COEX Signal Definition – UART ECN  M.2 2242 WWAN Module ECN  M.2 Signal Definition – Audio & ANTCTL Functions ECN  Tx Blanking and SYSCLK on Socket 1 Related Pinouts ECN  Power-up Requirements for PCIe Side Bands (PERST#, etc.) ECN  Power-up Requirements for PCIe Side Bands in a VBAT Powered System ECN  MiniEx_M2_ECN_SMBus_for_SSD_Socket2_Socket3 - 1112_14  WWAN_Key_C_Definition_ECN_WW12.3  SMBus ECN, Clarification  BGA-SSD ECN  M.2 SSIC Eye Limits Definitions Other changes:  Incorporated all changes from M2_10 Errata Table and Backup of M 2 Rev1 0 Errata Table 04292015-6.8Added section 6.8, High Speed Differential Pair AC Coupling Cap Values and Cap Location Examples  Changed all Mid-Line and Mid-plane to Mid-mount per WG decision。 The M.2 family comprised of several module sizes and designated by the following names (see Figure 2):  Type 1216  Type 1620  Type 1630  Type 2024  Type 2226  Type 2228  Type 2230  Type 2242  Type 2260  Type 2280  Type 2828  Type 3026  Type 3030  Type 3042  Type 22110

This document is organized in a top down manner from the point of view of the PXE client “boot behavior”. 这份是网卡启动 PXE 启动的Spec，详细讲解了网卡legacy 启动（PXE boot）的流程和协议。

mpc5604 --- Autosar_Specification_4.0.3