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(5) CAN message data registers n0 to n7 (M_DATAn0 to M_DATAn7) (n = 00 to 31)
The M_DATAnx registers are areas where up to 8 bytes of transmit or receive data is stored (n = 00 to 31, x
= 0 to 7).
These registers can be read/written in 8-bit units.
7
M_DATAn0
D0_7
D0_6
(n = 00 to 31)
7
M_DATAn1
D1_7
D1_6
(n = 00 to 31)
7
M_DATAn2
D2_7
D2_6
(n = 00 to 31)
7
M_DATAn3
D3_7
D3_6
(n = 00 to 31)
7
M_DATAn4
D4_7
D4_6
(n = 00 to 31)
7
M_DATAn5
D5_7
D5_6
(n = 00 to 31)
7
M_DATAn6
D6_7
D6_6
(n = 00 to 31)
7
M_DATAn7
D7_7
D7_6
(n = 00 to 31)
Bit Position
Bit Name
7 to 0
D7_7 to
D0_0
Remark n = 00 to 31
556
CHAPTER 11 FCAN CONTROLLER
6
5
4
D0_5
D0_4
6
5
4
D1_5
D1_4
6
5
4
D2_5
D2_4
6
5
4
D3_5
D3_4
6
5
4
D4_5
D4_4
6
5
4
D5_5
D5_4
6
5
4
D6_5
D6_4
6
5
4
D7_5
D7_4
Indicates the contents of the message data.
Cautions 1. The M_DATAn0 to M_DATAn7 registers are fields used to hold receive
data and transmit data.
messages defined by the DLC3 to DLC0 bits in the M_DLCn register are
transmitted via the CAN bus.
2. When the M_CTRLn register's ATS bit has been set (to 1) and the value
of the DLC3 to DLC0 bits in the M_DLCn register is at least two bytes,
the last two bytes that are sent normally via the CAN bus are ignored
and the time stamp value is sent.
3. When a new message is received, all data fields are updated, even
when the value of the DLC3 to DLC0 bits in the M_DLCn register is less
than 8 bytes. The values of data bytes that have not been received may
be updated, but they are ignored.
User's Manual U14492EJ3V0UD
3
2
1
D0_3
D0_2
D0_1
3
2
1
D1_3
D1_2
D1_1
3
2
1
D2_3
D2_2
D2_1
3
2
1
D3_3
D3_2
D3_1
3
2
1
D4_3
D4_2
D4_1
3
2
1
D5_3
D5_2
D5_1
3
2
1
D6_3
D6_2
D6_1
3
2
1
D7_3
D7_2
D7_1
Function
When data is transmitted, the number of
0
Address
Initial value
D0_0
See Table 11-17
Undefined
0
Address
Initial value
D1_0
See Table 11-17
Undefined
0
Address
Initial value
D2_0
See Table 11-17
Undefined
0
Address
Initial value
D3_0
See Table 11-17
Undefined
0
Address
Initial value
D4_0
See Table 11-17
Undefined
0
Address
Initial value
D5_0
See Table 11-17
Undefined
0
Address
Initial value
D6_0
See Table 11-17
Undefined
0
Address
Initial value
D7_0
See Table 11-17
Undefined
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