PXS20RM Datasheet, PDF (804/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
Table 26-90. FR_MBCCFRn Field Descriptions
Field
Description
MTM
Message Buffer Transmission Mode — This control bit applies only to transmit message buffers
and defines the transmission mode.
0 Event transmission mode
1 State transmission mode
CHA
CHB
Channel Assignment — These control bits define the channel assignment and control the receive
and transmit behavior of the message buffer according to Table 26-91.
CCFE
Cycle Counter Filtering Enable — This control bit is used to enable and disable the cycle counter
filtering.
0 Cycle counter filtering disabled
1 Cycle counter filtering enabled
CCFMSK Cycle Counter Filtering Mask — This field defines the filter mask for the cycle counter filtering.
CCFVAL Cycle Counter Filtering Value — This field defines the filter value for the cycle counter filtering.
.
CHA
1
0
1
0
CHB
1
1
0
0
Table 26-91. Channel Assignment Description
Transmit Message Buffer
Receive Message Buffer
static segment dynamic segment static segment dynamic segment
transmit on both
channel A and
channel B
Reserved
(Function not
guaranteed)
store first valid frame Reserved
received on either (Function not
channel A or
guaranteed)
channel B
transmit on channel transmit on channel store first valid frame store first valid frame
B
B
received on channel received on channel
B
B
transmit on channel transmit on channel store first valid frame store first valid frame
A
A
received on channel received on channel
A
A
no frame
transmission
no frame
transmission
no frame stored
no frame stored
NOTE
If at least one message buffer assigned to a certain slot is assigned to both
channels, then all message buffers assigned to this slot have to be assigned
to both channels. Otherwise, the message buffer configuration is illegal and
the result of the message buffer search is not defined.
26-92
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor