mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 143

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

Where:
The size of the data field in the MFR4200 is limited to 32 bytes.
3.3.2
3.3.2.1
Each transmit and receive message buffer and the FIFO buffer contains a frame ID field. This field is
interpreted differently for receive message buffers, transmit message buffers, and the receive FIFO.
Freescale Semiconductor
Message Buffer Slot Status Vector
R
*
RO_NO/WR_CS
R
P
P
TX_CS_NO
ID1/Data1/NMVector1
Data11/NMVector11
Table 3-14. Mapping between Buffer Layout and Active Receive/Transmit/FIFO Message Buffers
FI
Data3/NMVector3
Data5/NMVector5
Data7/NMVector7
Data9/NMVector9
N
WR
RO
NU
Cycle Count (6 bits)
SYN
R
Message
C
Data13
Data31
Message Buffer Field Descriptions
ID[10:0] — Frame ID Field
…
Message Buffer Layout
STAR
T UP
Host read access; host write access during the configuration state only
Host read access; host write access:
Host read-only access
Host read/write access
Reserved or read-only bits not used by the CC during operation
– during the configuration state for all transmit message buffers
– during normal mode of operation for buffers configured for the dynamic segment of the
communication cycle (read-only access for static segment buffers)
Header CRC (11 bits)
Frame ID (11 bits)
R
ID0/Data0/NMVector0
Data10/NMVector10
Data2/NMVector2
Data4/NMVector4
Data6/NMVector6
Data8/NMVector8
PayloadLength (7
Message
Data12
Data30
…
bits)
MFR4200 Data Sheet, Rev. 0
Active FIFO/Receive/Transmit Buffer Frame ID Register
Active FIFO/Receive/Transmit Buffer Cycle Counter and Payload
Length Register
Active FIFO/Receive/Transmit Buffer Header CRC Register
Active FIFO/Receive/Transmit Buffer Data 0 Register
Active FIFO/Receive/Transmit Buffer Data 1 Register
Active FIFO/Receive/Transmit Buffer Data 2 Register
Active FIFO/Receive/Transmit Buffer Data 3 Register
Active FIFO/Receive/Transmit Buffer Data 4 Register
Active FIFO/Receive/Transmit Buffer Data 5 Register
Active FIFO/Receive/Transmit Buffer Data 6 Register
Active FIFO/Receive/Transmit Buffer Data 15 Register
Vector Register
Active FIFO/Receive/Transmit Buffer Message Buffer Slot Status
Active FIFO/Receive/Transmit
Message Buffers Register
…
Message Buffer
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