Freescale Semiconductor FlexRay MFR4310, Reference Manual

Page: 141 / 268

FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 141
Figure 3-100. Example of FRM Layout
3.4.4.1 Message Buffer Header Area
The message buffer header area contains all message buffer header fields of the physical message buffers
for all message buffer types. The following rules apply to the message buffer header fields for the three
type of message buffers.
1. The start address SADR_MBHF of each message buffer header field for individual message
buffers and receive shadow buffers must fulfill Equation 3-6 .
SADR_MBHF = (i * 10) + 0x800; (0 <= i < 256) Eqn. 3-6
2. The start address SADR_MBHF of each message buffer header field for the receive FIFO must
fulfill Equation 3-7 .
SADR_MBHF = (i * 10) + 0x800; (0 <= i < 256) Eqn. 3-7
3. The message buffer header fields for a receive FIFO have to be a contiguous area.
3.4.4.2 Message Buffer Data Area
The message buffer data area contains all the message buffer data fields of the physical message buffers.
Each message buffer data field must start at a 16-bit boundary.
Me
ssage Buffer Header Area
FRM
Message Buffer Data Area
Sync Frame Table Area
Data Field Offset Frame Header Slot Status
Data Field Offset Frame Header Slot Status
Message Buffer Header Fields
Individual Message Buffers
Receive Shadow Buffers
Data Field Offset Frame Header Slot Status
Data Field Offset Frame Header Slot Status
Message Buffer Header Fields
Receive FIFO A
Data Field Offset Frame Header Slot Status
Data Field Offset Frame Header Slot Status
Message Buffer Header Fields
Receive FIFO B
Data Field Offset Frame Header Slot Status
10 bytes
0x800
Device Memory