CHAPTER 11 FCAN CONTROLLER
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User’s Manual U14492EJ3V0UD
Figure 11-46. C1SYNC Register Settings
15
14
13
12
11
10
9
8
C1SYNC
0
0
0
SAMP
SJW1
SJW0
SPT4
SPT3
Setting
0
0
0
0
1
0
0
1
7
6
5
4
3
2
1
0
SPT2
SPT1
SPT0
DBT4
DBT3
DBT2
DBT1
DBT0
Setting
0
1
1
0
1
1
1
1
11.13 Prioritization of Message Buffers During Receive Comparison
Several message buffers can be constructed for receiving messages. In such cases, a system of prioritization in
receiving messages must be established for these message buffers.
11.13.1 Reception of data frames
Table 11-24. Prioritization of Message Buffers When Receiving Data Frames
Priority Ranking
Description
1 (High)
Receive messages can be stored in receive message buffers when the receive messages meet the
following conditions.
<1> Messages are not linked to masks
<2> M_STATn register’s DN bit has not been set (to 1) (n = 00 to 31)
If several messages have met the above conditions, the message buffer having the lowest message
number is selected.
2
Receive messages can be stored in receive message buffers when the receive messages meet the
following conditions.
<1> Messages are not linked to masks
<2> M_STATn register’s DN bit has been set (to 1) (n = 00 to 31)
If several messages have met the above conditions, the message buffer having the lowest message
number is selected.
3 (Low)
Receive messages can be stored in receive message buffers that are linked to masks. However, the
following conditions must be met.
<1> If several receive message buffers are linked to masks, the message buffer will be selected
based on the mask number assigned to it. The lowest mask number takes the highest priority.
<2> If several message buffers meet the conditions mentioned in “<1>” above, the message buffer is
selected based on its DN bit (in the M_STATn register).
A message buffer in which this bit is not set (to 1) takes priority over a message buffer in which
this bit is set (to 1).
<3> If several message buffers meet the conditions mentioned in “<1>” and “<2>” above, the
message buffer with the lowest message number is selected.
Содержание V850E/IA1 mPD703116
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