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软件名称 CAN Specification V2.0
运行环境 Win9X/Win2000/WinXP/Win2003/
整理时间 2008-9-12 16:29:06
软件星级
软件大小 555 KB csb23@126.com
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相关连接 官方主页  [点击收藏]
 技术资料介绍
    The acceptance and introduction of serial communication to more and more
    applications has led to requirements that the assignment of message identifiers to
    communication functions be standardized for certain applications. These applications
    can be realized with CAN more comfortably, if the address range that originally has
    been defined by 11 identifier bits is enlarged
    Therefore a second message format (’extended format’) is introduced that provides a
    larger address range defined by 29 bits. This will relieve the system designer from
    compromises with respect to defining well-structured naming schemes. Users of CAN
    who do not need the identifier range offered by the extended format, can rely on the
    conventional 11 bit identifier range (’standard format’) further on. In this case they can
    make use of the CAN implementations that are already available on the market, or of
    new controllers that implement both formats.
    In order to distinguish standard and extended format the first reserved bit of the CAN
    message format, as it is defined in CAN Specification 1.2, is used. This is done in such
    a way that the message format in CAN Specification 1.2 is equivalent to the standard
    format and therefore is still valid. Furthermore, the extended format has been defined
    so that messages in standard format and extended format can coexist within the same
    network.
    This CAN Specification consists of two parts, with
    • Part A describing the CAN message format as it is defined in CAN Specification 1.2;
    • Part B describing both standard and extended message formats.
    In order to be compatible with this CAN Specification 2.0 it is required that a CAN
    implementation be compatible with either Part A or Part B.
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