MIPI联盟已完成车载的Long-Reach SerDes PHY工业标准 A-PHY v1.0

Specification designed to accelerate ADAS, ADS and IVI automotive connectivity enters final approval phase, with release expected in 90 days

用来加速ADAS, ADS和IVI车载连接的规格书进入了最后的审核阶段，将在90天内发布。

PISCATAWAY, N.J., June 3, 2020—The MIPI Alliance, an international organization that develops interface specifications for mobile and mobile-influenced industries, today announced that development has been completed on MIPI A-PHY v1.0, a long-reach serializer-deserializer (SerDes) physical layer interface for automotive applications. The specification is undergoing member review, with official adoption expected within the next 90 days.

MIPI联盟，一个为手机、手机相关的产业开发接口规范的国际组织，今天宣布已经完成MIPI A-PHY v1.0的开发。这是一个车载方面的long-reach SerDes物理层接口协议。

A-PHY will provide a physical layer for data transfers spanning an entire vehicle. As the first standard of its kind, it will help the automotive industry accelerate the availability of advanced driver assistance systems (ADAS), autonomous driving systems (ADS) and other surround-sensor applications, including cameras and in-vehicle infotainment (IVI) displays.

A-PHY将提供跨越整个车辆的数据传输的物理层协议。作为协议的第一版，它将帮助汽车产业加速ADAS（高级辅助驾驶系统）、ADS（无人驾驶系统）、周边传感器、还包括摄像头和IVI（车载显示）。

MIPI A-PHY serves as the foundation of what will be an end-to-end system designed to simplify the integration of cameras, sensors and displays, while also incorporating functional safety and security. Higher-layer MIPI protocols, such as Camera Serial Interface (MIPI CSI-2) and Display Serial Interface (MIPI DSI-2), are already used to connect sensors and displays to domain ECUs and other onboard computers in many vehicles. They currently are transported over MIPI C-PHY or D-PHY shorter-reach physical layers and use "bridge" solutions to connect to proprietary long-reach PHYs. With the use of upcoming adaptation layers, these higher-layer protocols will run natively over A-PHY, eliminating the need for these proprietary bridges.

MIPI A-PHY作为端到端系统的基础，用来简化摄像头、传感器和显示的集成，同时也包含了安全方面的考虑。高层次MIPI协议，例如CSI-2和DSI-2，已经在用在了连接传感器和显示，和很多车载计算机。他们现在采用通过MIPI C-PHY或者D-PHY（shorter-reach）物理层桥接到long-reach PHY的方案。通过即将开布的适配层协议，这些高层协议将原生的运行在A-PHY上，不再需要桥接。

“A-PHY is a major milestone in the industry. MIPI is leading the charge to provide new interconnects that will help make cars safer and smarter for their operators,” said Joel Huloux, chairman of MIPI Alliance. “By offering a long-reach automotive wired connectivity solution, MIPI is building on its successful track record in the mobile industry, including its camera and display interface specifications, which are already prevalent in cars today.”

“A-PHY是产业的一个主要的里程碑。MIPI将领导、主宰新的车载互联，提供更安全、更智能的汽车。” MIPI联盟的主席Joel Huloux说， “通过提供有线的long-reach汽车连接方案，MIPI正在建立汽车工业的成功记录，现在摄像头和显示接口规范已经普遍应用于汽车了。”

A-PHY is being developed as an asymmetric data link in a point-to-point topology, with high-speed unidirectional data, embedded bidirectional control data and optional power delivery, all over a single cable. Version 1.0 offers several core benefits:

A-PHY是不对称的点对点的数据互连，通过一根线缆，提供有高速单向的数据、嵌入式双向的控制、有选的电源传输。1.0版本提供以下几个主要功能：

• Simpler system integration and lower cost: native support for devices using MIPI CSI-2 and DSI-2, ultimately eliminating the need for bridge ICs 更简单的系统集成和更低的功耗：原生支持MIPI CSI-2和DSI-2，永远不再需要桥接芯片
• Long reach: up to 15 meters 远距离：长达15米
• High performance: 5 speed gears (2, 4, 8, 12 and 16 Gbps), with a roadmap to 48 Gbps and beyond 高性能：5种速度档位（2、4、8、12、16 Gbps）, 开发线路图上计划超过48 Gbps
• High reliability: ultra-low 1E-18 packet error rate for unprecedented performance over the lifetime of a vehicle 高可靠性：超过车辆生命周期内，前所未有的超低（1E-18）的包出错率的性能
• High resilience: ultra-high immunity to EMC effects by virtue of a unique PHY-layer retransmission system
• 高恢复能力：独特的PHY层失败重传系统保证了超高的免受EMC影响

MIPI A-PHY will allow designers to optimize systems for the performance, cost and complexity required by their use cases, providing scalability and flexibility to meet a broad range of speed and design needs. For integration with existing network backbones, A-PHY complements Ethernet, CAN, FlexRay and other interfaces.

MIPI A-PHY允许设计师根据他们的客户需求来优化系统的性能、成本和复杂度，提供可扩展性、灵活性来满足宽速度要求和设计需求。为了与现有的网络干线集成，A-PHY补充了与Ethernet，CAN，FlexRay和其它接口。

The specification will allow OEMs, Tier 1 suppliers and component makers to gradually replace proprietary physical layers between onboard computers and the growing array of sensors, cameras and displays in vehicles. Having a standard long-reach PHY will improve economies of scale, simplify in-car networks, cut costs, and save space, weight and energy consumption.

规范允许OEM、Tier 1提供商和元件制造商逐渐的替代掉板载计算机和正在增长的车载传感器阵列、摄像头、和显示等物理层。有long-reach PHY将会提升规模经济，简化车内网络，减少成本、节省空间、重量和能源消耗。

In addition, MIPI Alliance will work with other organizations to leverage native protocols through a generic data link layer included with A-PHY. As one such effort, MIPI has extended its liaison with VESA and is actively developing an A-PHY adaptation layer for use with its DisplayPort and Embedded DisplayPort standards.

另外，MIPI联盟将会其它组织一起，在A-PHY里通过通用数据链接层来扩大原生协议的作用。一个例子，MIPI已经与VESA积极开发了A-PHY的适配层来使用DisplayPort和嵌入式DisplayPort协议。

“The automotive market is an anticipated area of growth for VESA’s DisplayPort and Embedded DisplayPort (eDP) standards,” said Craig Wiley, senior director of marketing for Parade Technologies, VESA board member and a member of the MIPI Display Working Group. “VESA’s collaboration with the MIPI Alliance has been encouraged by the automotive industry to ensure a wide range of interface types and product compatibility across A-PHY. The support for DisplayPort and eDP in particular applies to the use of larger size panels, such as those we are seeing in automotive infotainment and center-console applications.”

“汽车市场是VESA的DisplayPort和嵌入式DisplayPort（eDP）的预测增长领域，” Parade Technologies（VESA董事会成员、MIPI显示工作组的会员）高级市场总监Craig Wiley说，“汽车产业鼓励VESA与MIPI联盟的合作，通过A-PHY来确保更宽范围的接口类型和产品兼容。尤其DisplayPort和eDP支持更大尺寸屏幕，比如汽车咨询娱乐、中控应用。”

To help ensure the interoperability of devices using A-PHY, a compliance test suite for testing developers’ implementations of the specification is already under development, and additional test resources and programs are being evaluated.

为了帮助使用A-PHY设备保证互通性，符合测试套件已经在开发中，以帮助测试开发人员实现协议，测试资源和计划也正在评估中。