FlexRay Development Platforms - Internal configuration of a node | Cypress Semiconductor
FlexRay Development Platforms - Internal configuration of a node
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 |
Internal configuration of a node
A node in FlexRay consists of a controller part and a driver part in hardware.
The configuration of the driver part varies depending on whether or not a "bus guardian" is mounted.
The following figure shows the configuration diagram with a bus guardian mounted.
Configuration diagram of a node in FlexRay (with a bus guardian mounted)
The controller part contains the host that controls the entire unit and the communication controller (CC) that controls the communications.
The controller part is connected to the driver part that has a redundant configuration.
The driver part contains the bus guardian that detects abnormal transmissions and disconnects the communication and the bus driver that exchanges physical signals and logical signals between FlexRay bus and CC.
There are two bus guardians, A and B, and two bus drivers, A and B so that they can configure fully duplicated network.
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Some parts of this site show only the outlines of the actual FlexRay standards to make them easily understood.