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Section 20 Controller Area Network
Page 990 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Table 20.1 Roles of Mailboxes
Event Trigger Time Trigger Remark
Tx Rx Tx Rx TimeStamp
Tx-Trigger
Time
MB31 Settable Settable Time reference
reception
Available
MB30 Settable Settable Time reference
transmission in
time master mode
Reception in
time slave mode
Available Available
MB29 - 24 Settable Settable Settable Settable Available
MB23 - 16 Settable Settable (ET) Settable
MB15 - 1 Settable Settable (ET) Settable Available
MB0 Settable Settable Available
(ET) shows that it works during merged arbitrating window, after completion of time-triggered
transmission.
TimeStamp[15:0] (CYCTR[15:0] or CCR[5:0]/CYCTR[15:6] at SOF)
1514131211109876543210
0RTRIDE
0 0 NMC 0 0 DLC[3:0]
EXTID[15:0]
STDID[10:0] EXTID[17:16]
MBC[2:0]
MSG_DATA_1
MSG_DATA_3
MSG_DATA_5
MSG_DATA_7
EXTID_
LAFM[17:16]
IDE_
LAFM
0
0
STDID_LAFM[10:0]
EXTID_LAFM[15:0]
0 0 0 0
TimeStamp[15:0] (CYCTR[15:0] or CCR[5:0]/CYCTR[15:6] at SOF)
1514131211109876543210
0RTRIDE
0 0 NMC ATX DART DLC[3:0]
EXTID[15:0]
STDID[10:0] EXTID[17:16]
MBC[2:0]
MSG_DATA_1
MSG_DATA_3
MSG_DATA_5
MSG_DATA_7
EXTID_
LAFM[17:16]
IDE_
LAFM
0
0
STDID_LAFM[10:0]
EXTID_LAFM[15:0]
0 0 0 0
MSG_DATA_0 (first Rx/Tx Byte)
MSG_DATA_2
MSG_DATA_4
MSG_DATA_6
MSG_DATA_0 (first Rx/Tx Byte)
MSG_DATA_2
MSG_DATA_4
MSG_DATA_6
Address
Data Bus
Access Size Field Name
Word/LW
Word
Word/LW
Word
Byte/Word/LW
Byte/Word
Byte/Word/LW
Byte/Word
Byte/Word
Word
Control 0
LAFM
Data
Control 1
TimeStamp
Word/LW
Word
Word/LW
Word
Byte/Word/LW
Byte/Word
Byte/Word/LW
Byte/Word
Byte/Word
Word
Control 0
LAFM
Data
Control 1
TimeStamp
MB0 (reception MB with timestamp)
MBC[1] is fixed to "1"
Byte: 8-bit access, Word: 16-bit access, LW (LongWord) : 32-bit access
MB15 to 1 (MB with timestamp)
H'100 + N*32
H'102 + N*32
H'104 + N*32
H'106 + N*32
H'108 + N*32
H'10A + N*32
H'10C + N*32
H'10E + N*32
H'110 + N*32
H'112 + N*32
Address
Data Bus
A
cc
ess Size Field Name
H'100 + N*32
H'102 + N*32
H'104 + N*32
H'106 + N*32
H'108 + N*32
H'10A + N*32
H'10C + N*32
H'10E + N*32
H'110 + N*32
H'112 + N*32
Figure 20.3 Mailbox-N Structure