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can_physical_layer:main [2016/11/07 17:40] – [CAN Transceivers] heinzcan_physical_layer:main [2018/08/13 13:06] – [CAN Transceivers] isensee
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  {{http://www.oertel-halle.de/pic/canbus_level.png | CAN bus signal levels }}  {{http://www.oertel-halle.de/pic/canbus_level.png | CAN bus signal levels }}
  
-The picture shows the two signal states **recessive** and **dominant** and its signal levels for the CAN high speed version. +The picture shows the two signal states **recessive** and **dominant** and its signal levels for the CAN high speed version with 1 Mbit/s. Since Dec 2016 ISO11898-2:2016 is published specifying bit rates above 1 Mbit/s 
 + 
  
  
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 [[CAN Transceivers]] are interfaces to the CAN controller and to the CAN bus. Its task is to adapt the logic level signals from the CAN controller to the signal levels on the CAN bus.   [[CAN Transceivers]] are interfaces to the CAN controller and to the CAN bus. Its task is to adapt the logic level signals from the CAN controller to the signal levels on the CAN bus.  
  
-Different physical Layers are described in various ISO 11898 Documents, see above+Different physical layers are described in various ISO 11898 Documents, see below
  
   * ISO11898-2 HighSpeed CAN   * ISO11898-2 HighSpeed CAN
   * ISO11898-3 LowSpeedFaultTolerant CAN   * ISO11898-3 LowSpeedFaultTolerant CAN
-  * ISO11898-5 LowPower 
-  * ISO11898-6 LowPowerSelectiveWakeUp 
  
-A common transceiver for the physical layer defined by ISO 11898-2 (high-speed) is NXP/Philips 82C250 and (improved version) 82c251. +A common transceiver for the physical layer defined by ISO 11898-2 (high-speed) is NXP TJA1044GT. 
-CAN transceivers are tested by the [[http://www.cs-group.de/ | C&S group]] (Germany) using the GIFT/ICT CAN High-Speed Transceiver Conformance Test. The paper [[http://www.cs-group.de/MunichGroupServer/public/documents/dev_spec/CAN_HS_PL_Req_12.pdf | High Speed CAN]] Specification, Requirements, Vehicle Manufacturers, explains the test in detail.+ 
 +CAN transceivers are tested by the [[http://www.cs-group.de/ | C&S group]] (Germany) using the GIFT/ICT CAN High-Speed Transceiver Conformance Test. The page [[https://www.cs-group.de/testing/conformance-tests/can-osi-1/ | Conformance Testing]] explains the test strategies in detail. Furthermore, the site includes a link to the newest version of the "**Interoperability test specification for high-speed CAN transceiver or equivalent devices**".
    
 Other transceivers are TJA1054 for ISO 11898-3 (low-speed fault-tolerant CAN FaultTolerantCAN) and AU5790 (for SAE J2411 single-wire CAN). Other transceivers are TJA1054 for ISO 11898-3 (low-speed fault-tolerant CAN FaultTolerantCAN) and AU5790 (for SAE J2411 single-wire CAN).

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