PXN20RM Datasheet, PDF (632/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

FlexRay Communication Controller (FlexRAY)
26.5.2.7 Message Buffer Data Size Register (MBDSR)
Base + 0x000C
0
1
R0
W
Reset 0
0
Write: POC:config
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
MBSEG2DS
MBSEG1DS
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 26-7. Message Buffer Data Size Register (MBDSR)
This register defines the size of the message buffer data section for the two message buffer segments in a
number of two-byte entities.
The controller provides two independent segments for the individual message buffers. All individual
message buffers within one segment have to have the same size for the message buffer data section. This
size can be different for the two message buffer segments.
Table 26-13. MBDSR Field Descriptions
Field
Description
MBSEG2DS Message Buffer Segment 2 Data Size — The field defines the size of the message buffer data section in
two-byte entities for message buffers within the second message buffer segment.
MBSEG1DS Message Buffer Segment 1 Data Size — The field defines the size of the message buffer data section in
two-byte entities for message buffers within the first message buffer segment.
26.5.2.8 Message Buffer Segment Size and Utilization Register (MBSSUTR)
Base + 0x000E
Write: POC:config
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
LAST_MB_SEG1
W
LAST_MB_UTIL
Reset 0
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
Figure 26-8. Message Buffer Segment Size and Utilization Register (MBSSUTR)
This register is used to define the last individual message buffer that belongs to the first message buffer
segment and the number of the last used individual message buffer.
26-18
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor