PXN20RM Datasheet, PDF (690/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

FlexRay Communication Controller (FlexRAY)
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.
26.5.2.70 Message Buffer Frame ID Registers (MBFIDRn)
Base + 0x0104 (MBFIDR0)
Base + 0x010C (MBFIDR1)
...
Base + 0x04FC (MBFIDR127)
Write: POC:config or MB_DIS
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
0
0
0
FID
W
Reset 0
0
0
0
0
-
-
-
-
-
-
-
-
-
-
-
Figure 26-101. Message Buffer Frame ID Registers (MBFIDRn)
Field
FID
Table 26-82. MBFIDRn Field Descriptions
Description
Frame ID — The semantic of this field depends on the message buffer transfer type.
• Receive Message Buffer: This field is used as a filter value to determine if the message buffer is used for
reception of a message received in a slot with the slot ID equal to FID.
• Transmit Message Buffer: This field is used to determine the slot in which the message in this message buffer
should be transmitted.
26.5.2.71 Message Buffer Index Registers (MBIDXRn)
Base + 0x0106 (MBIDXR0)
Base + 0x010E (MBIDXR1)
...
Base + 0x04FE (MBIDXR127)
Write: POC:config or MB_DIS
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
0
0
0
0
0
0
W
MBIDX
Reset 0
0
0
0
0
0
0
0
-
-
-
-
-
-
-
-
Figure 26-102. Message Buffer Index Registers (MBIDXRn)
Field
MBIDX
Table 26-83. MBIDXRn Field Descriptions
Description
Message Buffer Index — This field provides the index of the message buffer header field of the physical
message buffer that is currently associated with this message buffer.
The application writes the index of the initially associated message buffer header field into this register. The
controller updates this register after frame reception or transmission.
26-76
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor