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Addressing formats
The exchange of network layer data is supported by three addressing formats: normal, extended and mixed addressing. Each addressing format requires a different number of CAN frame data bytes to encapsulate the addressing information associated with the data to be exchanged. Consequently, the number of data bytes transported within a single CAN frame depends on the type of addressing format chosen.
The following (7.3.2 to 7.3.5) specifies the mapping mechanisms for each addressing format, based on the data link layer services and service parameters defined in ISO 11898-1.
Road vehicles — Diagnostics on Controller Area Networks (CAN) —
Part 2:Network layer services : ISO 15765-2:2004(E)
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CAN2.0B协议数据定义与SAE J 1939协议消息中R,DF,PF,PS,SA,PGN,SPN的对应的关系.
CAN2.0是一种总线规范，是数据链路层的技术。J1939是SAE（美国汽车协会）定义的基于CAN总线的规范，目的是解决不同发动机厂商、不同ECU厂商的兼容性问题。
CAN2.0是一种总线规范，是数据链路层的技术。J1939是SAE（美国汽车协会）定义的基于CAN总线的规范，目的是解决不同发动机厂商、不同ECU厂商的兼容性问题。
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目前，我国新能源汽车承保使用传统车险条款，暂无针对新能源车的专属车险产品。为了促进新能源汽车行业的可持续健康发展，监管正加强对新能源车险的研究。