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FlexRay - Status transition | Cypress Semiconductor

FlexRay - Status transition

 Background |  Overview |  Features |  In-car Communication Protocol |  Target applications |  Data transfer method |  Difference with CAN |  Internal configuration of a node |  Electronic signals |  Bus Guardian |  Topology |  Segment configuration |  Protocol |  Status transition |  Error control |

FlexRay ASSP

The status transition of FlexRay from the initial setting to normal communication is shown below.

 FlexRay status transition

  1. Configuration status (Default config/config)
    Makes all kinds of initial settings including communication cycle or baud rate.
  2. Ready status
    Makes the internal communication settings.
  3. Wakeup status
    To wake up the cluster that is not communicating, send the WUP signal to wake up the other node.
    The node that received the WUP signal wakes up and enables CC, BD, and BG.
  4. Startup status
    Start the clock synchronization and be ready for communication.
    If no communication is performed after wakeup, clock synchronization is performed on the basis of a node (reading startup node)
    For the clusters that have communicated, the clock synchronization is performed on the attending node.
  5. Normal status
    It indicates the communication available state.
  6. Halt status
    It indicates that communication is stopped.

- Note -

Some parts of this site show only the outlines of the actual FlexRay standards to make them easily understood.