FlexRay Module (FLEXRAYV2)
MFR4300 Data Sheet, Rev. 1
Freescale Semiconductor
69
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 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.
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
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
Table 3-9
.
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
Reserved
— This bit is reserved. It is read as ‘0’. Application must not write ‘1’ to this bit.
13
SCM
12–11
CHB
CHA
10
SFFE
8
R*
4
R*
Reserved
— This bit is reserved. It is read as ‘0’. Application must not write ‘1’ to this bit.
3–1
R*
Reserved
— This field is reserved. It is read as ‘000’. Application must not write ‘1’ to any bit.
Table 3-9. Channel Enable Mapping (Sheet 1 of 2)
SCM
CHB
CHA
Description
Dual Channel Device Modes
0
0
0
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
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
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
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
0
1
1
0
1
1
Single Channel Device Mode