mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 161

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

3.5.3
The concept of active message buffers simplifies buffer access for the host. If a buffer is locked by the host,
then, depending on the message buffer configuration, the buffer data and configuration information is
mirrored to one of the active buffers — the active receive message buffer, the active transmit message
buffer, or the active receive FIFO buffer.
3.5.3.1
The active receive message buffer (see
fields. Any receive message buffer is accessible through the active receive message buffer after the locking
procedure for this buffer has been finished. The active receive message buffer layout is shown in
Table
Buffer control, configuration, filtering and status data is stored in the buffer control, configuration, status
and filtering registers set. The layout of the set is presented in
Freescale Semiconductor
Figure 3-131. Buffer Control, Configuration, Status/Filtering Register Set for Transmit/Receive Buffers
3-11.
Configuration, Status and
(4 Words X 59 Buffers)
Filtering Registers Set
Active Message Buffers
Buffer Control,
Active Receive Message Buffer
472 Bytes
Table
MFR4200 Data Sheet, Rev. 0
Message Buffer 0
Message Buffer 58
3-1) contains receive message buffer data and configuration
Message Buffer Control, Configuration and Status
Message Buffer Control, Configuration and Status
Cycle Counter Filter 0 Register (CCF58R)
Cycle Counter Filter 0 Register (CCF0R)
Register (BUFCS58R)
Register (BUFCS0R)
Figure
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3-131.
Message Buffer Handling and Operations
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