FlexRay Communication Controller (FlexRay)MPC5644A Microcontroller Reference Manual, Rev. 61444 Freescale SemiconductorNOTEThe CC does not provide a memory protection scheme for the FlexRaymemory area.33.1.5 FeaturesThe CC provides the following features:• FlexRay Communications System Protocol Specification, Version 2.1 Rev A compliant protocolimplementation• FlexRay Communications System Electrical Physical Layer Specification, Version 2.1 Rev Acompliant bus driver interface• Single channel support— FlexRay Port A can be configured to be connected either to physical FlexRay channel A orphysical FlexRay channel B.• FlexRay bus data rates of 10 Mbit/s, 8 Mbit/s, 5 Mbit/s, and 2.5 Mbit/s supported• 128 configurable message buffers with— Individual frame ID filtering— Individual channel ID filtering— Individual cycle counter filtering• Message buffer header, status and payload data stored in dedicated FlexRay memory area— Allows for flexible and efficient message buffer implementation— Consistent data access ensured by means of buffer locking scheme— Application can lock multiple buffers at the same time• Size of message buffer payload data section configurable from 0 up to 254 bytes• 2 independent message buffer segments with configurable size of payload data section— Each segment can contain message buffers assigned to the static segment and message buffersassigned to the dynamic segment at the same time• Zero padding for transmit message buffers in static segment— Applied when the frame payload length exceeds the size of the message buffer data section• Transmit message buffers configurable with state/event semantics• Message buffers can be configured as— Receive message buffer— Single buffered transmit message buffer— Double buffered transmit message buffer (combines two single buffered message buffer)• Individual message buffer reconfiguration supported— Means provided to safely disable individual message buffers— Disabled message buffers can be reconfigured• 2 independent receive FIFOs— 1 receive FIFO per channel
