mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 139

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Specific Configuration Data
The set of message buffer specific configuration data for individual message buffers is located in the
following registers.
3.4.3.5
During normal operation, each individual message buffer can be controlled by the control and trigger bits
CMT, LCKT, EDT, and MBIE in the
(MBCCSRn).
3.4.3.6
Before frame reception into the individual message buffers can be performed, the receive shadow buffers
must be configured. The configuration data are provided by the
(RSBIR). For each receive shadow buffer, the application provides the message buffer header index. When
the protocol is in the
under full FlexRay module control.
3.4.3.7
This section describes the configuration and control data for the two receive FIFOs.
3.4.3.7.1
The FlexRay module provides two completely independent receive FIFOs, one per channel. Each FIFO
has its own set of configuration data. The configuration data are located in the following registers:
Freescale Semiconductor
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Message Buffer Data Size Register (MBDSR)
The MBSEG2DS and MBSEG1DS fields define the minimum length of the message buffer data
field with respect to the message buffer segment.
Message Buffer Segment Size and Utilization Register (MBSSUTR)
The LAST_MB_SEG1 and LAST_MB_UTIL fields define the segmentation of the individual
message buffers and the number of individual message buffers that are used. For more details, see
Section 3.4.3.1.1, “Individual Message Buffer
Message Buffer Configuration, Control, Status Registers (MBCCSRn)
The MCM, MBT, MTD bits configure the message buffer type.
Message Buffer Cycle Counter Filter Registers (MBCCFRn)
The MTM, CHA, CHB bits configure the transmission mode and the channel assignment. The
CCFE, CCFMSK, and CCFVAL bits and fields configure the cycle counter filter.
Message Buffer Frame ID Registers (MBFIDRn)
For a transmit message buffer, the FID field is used to determine the slot in which the message in
this message buffer will be transmitted.
Message Buffer Index Registers (MBIDXRn)
This MBIDX field provides the index of the message buffer header field of the physical message
buffer that is currently associated with this message buffer.
Individual Message Buffer Control Data
Receive Shadow Buffer Configuration Data
Receive FIFO Control and Configuration Data
Receive FIFO Configuration Data
POC:normal active
Message Buffer Configuration, Control, Status Registers
MFR4300 Data Sheet, Rev. 3
or
POC:normal passive
Segments”
Receive Shadow Buffer Index Register
state, the receive shadow buffers are
FlexRay Module (FLEXRAYV2)
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