eMMC 5.0协议规范英文版，Revision of JESD84-B451, June 2012

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This Unified Extensible Firmware Interface (hereafter known as UEFI) Specification describes an interface between the operating system (OS) and the platform firmware. UEFI was preceded by the Extensible Firmware Interface Specification 1.10 (EFI). As a result, some code and certain protocol names retain the EFI designation. Unless otherwise noted, EFI designations in this specification may be assumed to be part of UEFI. The interface is in the form of data tables that contain platform-related information, and boot and runtime service calls that are available to the OS loader and the OS. Together, these provide a standard environment for booting an OS. This specification is designed as a pure interface specification. As such, the specification defines the set of interfaces and structures that platform firmware must implement. Similarly, the specification defines the set of interfaces and structures that the OS may use in booting. How either the firmware developer chooses to implement the required elements or the OS developer chooses to make use of those interfaces and structures is an implementation decision left for the developer. The intent of this specification is to define a way for the OS and platform firmware to communicate only information necessary to support the OS boot process. This is accomplished through a formal and complete abstract specification of the software-visible interface presented to the OS by the platform and firmware. Using this formal definition, a shrink-wrap OS intended to run on platforms compatible with supported processor specifications will be able to boot on a variety of system designs without further platform or OS customization. The definition will also allow for platform innovation to introduce new features and functionality that enhance platform capability without requiring new code to be written in the OS boot sequence. Furthermore, an abstract specification opens a route to replace legacy devices and firmwa

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ZigBee协议规范1.0(英文) ZigBee协议规范1.0(英文)

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PROFIBUS 规范(1)-标准部分总论 PROFIBUS 规范(2)-物理层规范和服务定义 PROFIBUS 规范(3)-数据链路层服务定义 PROFIBUS 规范(4)-数据链路层协议规范 PROFIBUS 规范(5)-应用层服务定义 PROFIBUS 规范(6)-应用层协议规范 PROFIBUS 规范(7)-网络管理 PROFIBUS 规范(8)-用户规范 PROFIBUS 规范(9)-用于过程自动化的物理层和数据链路层

本规范描述了如何在OPC UA服务器和客户端之间传输数据和信息，内容包括： 数据编码/解码概述和标准数据类型以及复杂数据类型和对象的规则 保护OPC UA消息的安全对话 安全验证规则 传输协议映射：UA TCP，SOAP / HTTP和HTTPS