FlexRay Module (FLEXRAYV2)
MFR4300 Data Sheet, Rev. 1
Freescale Semiconductor
75
3.3.2.9
Protocol Operation Control Register (POCR)
The application uses this register to issue
protocol control commands
external clock correction commands
Protocol control commands are issued by writing to the POCCMD field. For more information on protocol
control commands, see
Section 3.6.2, “Protocol Control Command Execution”
.
External clock correction commands are issued by writing to the EOC_AP and ERC_AP fields. For more
information on external clock correction, refer to
Section 3.4.11, “External Clock Synchronization”
.
Table 3-14. MBSSUTR Field Descriptions
Field
Description
14–8
LAST_MB_SEG1
Last Message Buffer In Segment 1
— This field defines the message buffer number of the last individual
message buffer that is assigned to the
first
message buffer segment. The individual message buffers in the
first
segment correspond to the message buffer control registers MBCCSRn, MBCCFRn, MBFIDRn,
MBIDXRn with n <= LAST_MB_SEG1. The first message buffer segment contains LAST_MB_SEG1+1
individual message buffers.
Note:
The
first
message buffer segment contains
at least
one individual message buffer.
The individual message buffers in the
second
message buffer segment correspond to the message buffer
control registers MBCCSRn, MBCCFRn, MBFIDRn, MBIDXRn with LAST_MB_SEG1 < n < 128.
Note:
If LAST_MB_SEG1 = 127 all individual message buffers belong to the
first
message buffer segment
and the
second
message buffer segment is empty.
Last Message Buffer Utilized
— This field defines the message buffer number of last utilized individual
message buffer. The message buffer search engine examines all individual message buffer with a message
buffer number n <= LAST_MB_UTIL.
Note:
If LAST_MB_UTIL=LAST_MB_SEG1 all individual message buffers belong to the
first
message
buffer segment and the
second
message buffer segment is empty.
6–0
LAST_MB_UTIL
0x0014
Write: Normal Mode
15
0
14
0
13
0
12
0
11
10
9
8
7
6
0
5
0
4
0
3
2
1
0
R
W WME
Reset
0
0
BSY
WMC
0
POCCMD
EOC_AP
0
ERC_AP
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 3-8. Protocol Operation Control Register (POCR)
Table 3-15. POCR Field Descriptions (Sheet 1 of 2)
Field
Description
15
WME
Write Mode External Correction
— This bit controls the write mode of the EOC_AP and ERC_AP fields.
0 Write to EOC_AP and ERC_AP fields on register write.
1 No write to EOC_AP and ERC_AP fields on register write.
External Offset Correction Application
— This field is used to trigger the application of the external offset
correction value defined in the
Protocol Configuration Register 29 (PCR29)
.
00 do not apply external offset correction value
01 reserved
10 subtract external offset correction value
11 add external offset correction value
11–10
EOC_AP