mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 173

• Manufacturer Part Number: mfr4200
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

3.5.6
The main principles of the host and the CC data exchange are as follows.
The host and the CC provide a set of transmit/receive operations for managing data flow between a
FlexRay network and the host.
3.5.6.1
Frames are stored in the CHI if there is at least one receive message buffer or FIFO receive buffer
configured. Therefore, it actively participates in the internal buffer filters matching process, which takes
Freescale Semiconductor
Figure 3-135. Transition Scheme Between Different Buffer Types Depending on Operational Mode of CC
•
•
•
The host has full control over the CC.
After the configuration step is performed by the host, the CC can run the FlexRay protocol. The
CC does not require any additional support from the host for operation in a cluster without faults
and disturbances.
Data exchange is based on access requests and acknowledge flags.
Message Buffer Operations
Data collection during Receive Operation
message buffer,
message buffer
static segment
Single/double
transmit
Receive
MFR4200 Data Sheet, Rev. 0
Transition in the Configuration state
Transition in the Normal and in the Configuration states
message buffer,
message buffer,
Double transmit
Single transmit
Message Buffer Handling and Operations
segment
segment
dynamic
dynamic
173