Freescale Semiconductor FlexRay MFR4310 - Figure 3-92. Message Buffer Configuration, Control, Status Registers (Mbccsrn); Table 3-75. Mbccsrn Field Descriptions

FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
130 Freescale Semiconductor
3.3.2.63 Message Buffer Configuration, Control, Status Registers (MBCCSRn)
The content of these registers comprises message buffer configuration data, message buffer control data,
message buffer status information, and message buffer interrupt flags.
0x0100 (MBCCSR0)
0x0108 (MBCCSR1)
...
0x04F8 (MBCCSR127)
Write: MCM, MBT, MTD: POC:config or MB_DIS
CMT: MB_LCK
EDT, LCKT, MBIE, MBIF: Normal Mode
Additional Reset: CMT, DUP, DVAL, MBIF: Message Buffer Disable
1514131211109876543210
R0
MCM MBT MTD CMT
00
MBIE
0 0 0 DUP DVAL EDS LCKS
MBIF
W
EDT LCKT
Reset0000000000000000
Figure 3-92. Message Buffer Configuration, Control, Status Registers (MBCCSRn)
Table 3-75. MBCCSRn Field Descriptions
Field Description
Message Buffer Configuration
14
MCM
Message Buffer Commit Mode — This bit applies only to double buffered transmit message buffers and defines
the commit mode.
0 Streaming commit mode
1 Immediate commit mode
13
MBT
Message Buffer Type — This bit applies only to transmit message buffers and defines the buffering type.
0 Single buffered transmit message buffer
1 Double buffered transmit message buffer
12
MTD
Message Buffer Transfer Direction — This bit defines the transfer direction of the message buffer.
0 Receive message buffer
1 Transmit message buffer
Message Buffer Control
11
CMT
Commit for Transmission — This bit applies only to transmit message buffers and indicates whether the
message buffer contains valid data that are ready for transmission. Both the application and the FlexRay module
can modify this bit.
• Application: The application sets this bit to indicate that the transmit message buffer contains valid data ready
for transmission. The application clears this bit to indicate that the message buffer data are no longer valid for
transmission.
• FlexRay module: The FlexRay module clears this bit when the message buffer data are no longer valid for
transmission.
0 Message buffer does not contain valid data.
1 Message buffer contains valid data.
10
EDT
Enable/Disable Trigger — This trigger bit is used to enable and disable a message buffer. The message buffer
enable is triggered when the application writes 1 to this bit and the message buffer is disabled, i.e. the EDS status
bit is 0. The message buffer disable is triggered when the application writes 1 to this bit and the message buffer
is enabled, i.e. the EDS status bit is 1.
0 No effect
1 message buffer enable/disable triggered
Note: If the application writes 1 to this bit, the write access to all other bits is ignored.