Freescale Semiconductor FlexRay MFR4310 - Table 3-8. MCR Field Descriptions; Table 3-9. Flexray Channel Selection

FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 71
Table 3-8. MCR Field Descriptions
Field Description
15
MEN
Module Enable — This bit indicates whether or not the FlexRay module is in the Disabled Mode. The application
requests the FlexRay module to leave the Disabled Mode by writing 1 to this bit. Before leaving the Disabled
Mode, the application must configure the SCM, CHB, CHA, TMODE, BITRATE values. For details see
Section 3.1.6, “Modes of Operation”.
0 Write: ignored, FlexRay module disable not possible
Read: FlexRay module disabled
1 Write: enable FlexRay module
Read: FlexRay module enabled
Note: If the FlexRay module is enabled it can not be disabled.
13
SCM
Single Channel Device Mode — This control bit defines the channel device mode of the FlexRay module as
described in Section 3.4.10, “Channel Device Modes”.
0 FlexRay module works in dual channel device mode
1 FlexRay module works in single channel device mode
12–11
CHB
CHA
Channel Enable — protocol related parameter: pChannels
The semantic of these control bits depends on the channel device mode controlled by the SCM bit and is given
Ta bl e 3 -9 .
10
SFFE
Synchronization Frame Filter Enable — This bit controls the filtering for received synchronization frames. For
details see Section 3.4.15, “Sync Frame Filtering”.
0 Synchronization frame filtering disabled
1 Synchronization frame filtering enabled
8
R*
Reserved — This bit is reserved. It is read as 0. Application must not write 1 to this bit.
4
R*
Reserved — This bit is reserved. It is read as 0. Application must not write 1 to this bit.
3–1
BITRATE
FlexRay Bus Bit Rate — This bit field defines the bit rate of the flexray channels according to Table 3-1 0.
Table 3-9. FlexRay Channel Selection
SCM CHB CHA Description
Dual Channel Device Modes
0
00
ports RXD_BG1, TXD_BG1, and TXEN1# not driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# not driven by FlexRay module
PE channel 0 idle
PE channel 1 idle
01
ports RXD_BG1, TXD_BG1, and TXEN1# driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# not driven by FlexRay module
PE channel 0 active
PE channel 1 idle
10
ports RXD_BG1, TXD_BG1, and TXEN1# not driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# driven by FlexRay module
PE channel 0 idle
PE channel 1 active
11
ports RXD_BG1, TXD_BG1, and TXEN1# driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# driven by FlexRay module
PE channel 0 active
PE channel 1 active
Single Channel Device Mode