MIPIAPHY协议规格书_PHY的errata资源-CSDN文库

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A-PHY的目标是为远程汽车创建一个单一的标准化解决方案，该解决方案可直接有效地承载MIPI CSI-2和DSI-2协议； 1.在短期内，桥接芯片提供商可以专注于单个长距离PHY标准A-PHY，以降低生态系统的复杂性和成本 2.从长远来看，诸如摄像机，SoC和显示器之类的端点可以本地支持集成的A-PHY并消除桥接芯片； A-PHY的关键技术优势包括：非对称优化架构。A-PHY从头开始设计，用于从摄像机/传感器到ECU以及ECU到显示器的高速非对称传输，同时为命令和控制提供并发的低速双向通信。与其他/对称架构相比，优化的非对称架构可简化设计并降低成本。简化系统集成并降低成本：对使用MIPI CSI-2和DSI-2的设备的原生支持，最终消除了对桥接IC的需求远距离：15米连接距离；高性能：5档速度(2,4,8 和16Gbps)，未来48Gbps甚至更高；端到端的功能安全：APHY+CSI2/DSI2可以支持ASILB~ASILD的功能安全；高可靠性：超低的误码率PER,10^-19，可在车辆使用寿命内提供空前的性能移动协议重用。在数十亿智能手机和物联网设备中成功部署后，MI MIPI A-PHY协议规格书是一项针对嵌入式系统，特别是在汽车行业的标准，旨在提供一种高效、标准化的解决方案，以连接远程汽车组件，如摄像机、SoC（系统级芯片）和显示器。A-PHY的核心目标是替代桥接芯片，减少生态系统的复杂性和成本，通过直接支持MIPI CSI-2和DSI-2协议实现这一点。 A-PHY协议的优势在于其非对称优化架构。这种设计特别适用于高速非对称传输，例如从摄像机或传感器到电子控制单元（ECU）以及ECU到显示器的数据流，同时还能进行低速双向命令和控制通信。与对称架构相比，这种优化设计简化了硬件设计，降低了制造成本。此外，A-PHY支持长达15米的连接距离，具备5个速度等级，分别是2Gbps、4Gbps、8Gbps和16Gbps，未来还有可能扩展到48Gbps及以上，以满足高性能需求。该协议还具有端到端的功能安全特性，能够支持ASIL B至ASIL D的安全等级，符合ISO 26262标准，确保了在车辆整个使用寿命内的高可靠性。误码率PER达到10^-19，意味着在长时间运行中能保持极低的错误率。 A-PHY还利用了MIPI联盟在移动设备（如智能手机和物联网设备）中广泛采用的协议，从而实现移动协议的重用，进一步增强了兼容性和成本效益。例如，它支持MIPI CSI-2（摄像头接口）和DSI-2（显示接口）协议，使得现有系统能无缝整合A-PHY，消除对桥接集成电路的需求。该标准由IEEE（电气和电子工程师协会）采用，基于MIPI联盟的A-PHY规范版本1.0，为汽车行业提供了物理层接口。它采用点对点或菊花链拓扑结构，通过单根电缆传输高速单向数据、嵌入式双向控制数据和可选电源，减少了布线、成本和重量。同时，A-PHY还能与其他网络骨架，如以太网、CAN（控制器局域网）、FlexRay等接口协同工作，实现更灵活的系统集成。关键词如8B/10B PCS（物理编码子层）、ACMD（先进命令数据）、ACMP（高级共模信号）、adoption（采用）、ADAS（高级驾驶辅助系统）、A-Header、A-Packet、A-Payload、APDLL、A-PHY、APPI（A-PHY物理接口）、asymmetric（非对称）、automotive（汽车）、ADS（自动驾驶系统）、camera（相机）、car noise（车噪声）、Clock Forwarding Service（时钟转发服务）、coaxial cable（同轴电缆）、CMSA（控制和管理系统架构）、CSE、CSI、CSI-2、descrambler（解扰器）、Display、DSE、DSI、DSI-2、Duplication Table（复制表）、Eye Diagram（眼图）、functional safety（功能安全）、gear（速率档位）、high-speed uni-directional data stream（高速单向数据流）、I2C、I3C、infotainment（信息娱乐）、inline connectors（直插式连接器）、IEEE 2977、ISO 26262、jitter（抖动）等，均体现了A-PHY协议的各个方面和技术细节。

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STANDARDS

IEEEStandardforAdoptionofMIPI

AllianceSpecificationforA‐PHY

Interface(A‐PHY)Version1.0



Developedbythe

IEEEBoardofGovernorsCorporateAdvisoryGroup(CAG)



IEEESAIndustryAffiliateNetwork(IAN)

basespecificationcontributedbyMIPIAlliance

Authorized licensed use limited to: Xian Jiaotong University. Downloaded on October 08,2023 at 01:58:08 UTC from IEEE Xplore. Restrictions apply.

Abstract: This standard adopts MIPI AllianceMIPI A-PHY Specification Version 1.0 as an IEEE

Standard. The adopted standard provides an asymmetric data link in a point-to-point or daisy-

chain topology, with high-speed unidirectional data, embedded bidirectional control data and

optional power delivery over a single cable. In this way, it reduces wiring, cost and weight, as

high-speed data, control data and optional power share the same physical wiring. For integration

with existing network backbones, it complements Ethernet, Controller Area Network (CAN),

FlexRay, and other interfaces.

Keywords: 8B/10B PCS, ACMD, ACMP, adoption, advanced driver assistance systems, A-

Header, A-Packet, A-Payload, APDLL, A-PHY, APPI, asymmetric, automotive, autonomous

driving systems, camera, car noise, Clock Forwarding Service, coaxial cable, Control and

Management System Architecture, CSE, CSI, CSI-2, descrambler, Display, DSE, DSI, DSI-2,

Duplication Table, Eye Diagram, functional safety, gear, high-speed uni-directional data stream,

I2C, I3C, infotainment, inline connectors, IEEE 2977, ISO 26262, jitter, Lidar, Local Functions,

long reach, low-speed bi-directional command and control data, MIPI Alliance, Multi-Port, NRZ,

optimal wiring cost and weight, Packet Duplication, Packet Forwarding, PAL/CSI-2, PAL/DSI-2,

PAL/eDP-DP, PAL/GPIO, PAL/I2C, PAM, PAM16, PAM-X PCS, Phy, Physical layer, PMD, power

distribution, power over coax, Power over Differential Line, Profile, protocol adaptation layer,

Radar, Routing Table, scrambler, sensor, SerDes, Serial interface, serializer-deserializer,

Shielded Differential Pair (SDP), Shielded Parallel Pair (SPP), Shielded Twisted Pair (STP), test

modes

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PDF: ISBN 978-1-5044-7698-0 STD24794

Print: ISBN 978-1-5044-7699-7 STDPD24794

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Authorized licensed use limited to: Xian Jiaotong University. Downloaded on October 08,2023 at 01:58:08 UTC from IEEE Xplore. Restrictions apply.

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