Renesas R5S72624 Manual De Usuario
Section 20 Controller Area Network
Page 1000 of 2108
R01UH0134EJ0400 Rev. 4.00
Sep
24,
2014
SH7262 Group, SH7264 Group
Important: Please note that the TimeStamp is stored in a temporary register. Only after a
successful transmission or reception the value is then copied into the related Mailbox field. The
TimeStamp may also be updated if the CPU clears RXPR[N]/RFPR[N] at the same time that
UMSR[N] is set in overrun, however it can be read properly before clearing RXPR[N]/RFPR[N].
successful transmission or reception the value is then copied into the related Mailbox field. The
TimeStamp may also be updated if the CPU clears RXPR[N]/RFPR[N] at the same time that
UMSR[N] is set in overrun, however it can be read properly before clearing RXPR[N]/RFPR[N].
(5) Tx-Trigger Time (TTT) and Time Trigger control
For Mailbox-29 to 24, when MBC is set to 000 (Bin) in time trigger mode (CMAX!= 3'b111), Tx-
Trigger Time works as Time_Mark to determine the boundary between time windows. The TTT
and TT control are comprised of two 16-bit read/write areas as follows. Mailbox-30 doesn't have
TT control and works as Time_Ref.
Trigger Time works as Time_Mark to determine the boundary between time windows. The TTT
and TT control are comprised of two 16-bit read/write areas as follows. Mailbox-30 doesn't have
TT control and works as Time_Ref.
Mailbox 30 to 24 can be used for reception if not used for transmission in TT mode. However they
cannot join the event trigger transmission queue when the TT mode is used.
cannot join the event trigger transmission queue when the TT mode is used.
Tx-Trigger Time
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit:
Initial value:
R/W:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TTT15
TTT14
TTT13
TTT12
TTT11
TTT7
TTT6
TTT5
TTT10
TTT9
TTT8
TTT4
TTT3
TTT2
TTT1
TTT0
Time Trigger control
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit:
Initial value:
R/W:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R/W
R/W
R/W
TTW[1:0]
0
0
0
Offset[5:0]
0
0
rep_factor[2:0]
The following figure shows the differences between all Mailboxes supporting Time Triggered
mode.
mode.
TTW[1:0]
Word
Word
Word
Trigger Time
Trigger Time
TT control
Tx-Trigger Time (Cycle Time)
Tx-Trigger Time (Cycle Time)
Offset[5:0]
rep_factor[2:0]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
H'114 + N*32
H'116 + N*32
MB29 to 24
MB30
H'114 + N*32
Figure 20.6 Tx-Trigger control field