J1939 Software
J1939 Protocol Stack
J1939 Protocol Stack

Experience Summary

  • 1000 Global Customers
  • 500 Protocol Stacks
  • 300 CAN Device Drivers
  • 75 Flash Bootloaders
  • 60 Microcontrollers & DSPs
  • 7 Real-Time Operating Systems
  • 1 United States Patent

J1939 CA

In SAE J1939, the acronym CA stands for Controller Application and represents the software, not hardware, entity associated with a particular J1939 address. An electronic control unit, which is a single piece of hardware, may contain multiple controller applications.
For example, a centrally located ECU could contain the "Engine Controller", the "Turbocharger Controller", and "Cruise Control Controller". In that case, there would be 3 CAs inside of a single piece of hardware or physical network node. Physically they are one node, but logically they are three nodes. All three CAs have to maintain their own source address and NAME field.
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