CHAPTER 11 FCAN CONTROLLER
556
User’s Manual U14492EJ3V0UD
(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
D0_7
M_DATAn0
(n = 00 to 31)
6
D0_6
5
D0_5
4
D0_4
3
D0_3
2
D0_2
1
D0_1
0
D0_0
Address
See
Table 11-17
Initial value
Undefined
7
D1_7
M_DATAn1
(n = 00 to 31)
6
D1_6
5
D1_5
4
D1_4
3
D1_3
2
D1_2
1
D1_1
0
D1_0
Address
See
Table 11-17
Initial value
Undefined
7
D2_7
M_DATAn2
(n = 00 to 31)
6
D2_6
5
D2_5
4
D2_4
3
D2_3
2
D2_2
1
D2_1
0
D2_0
Address
See
Table 11-17
Initial value
Undefined
7
D3_7
M_DATAn3
(n = 00 to 31)
6
D3_6
5
D3_5
4
D3_4
3
D3_3
2
D3_2
1
D3_1
0
D3_0
Address
See
Table 11-17
Initial value
Undefined
7
D4_7
M_DATAn4
(n = 00 to 31)
6
D4_6
5
D4_5
4
D4_4
3
D4_3
2
D4_2
1
D4_1
0
D4_0
Address
See
Table 11-17
Initial value
Undefined
7
D5_7
M_DATAn5
(n = 00 to 31)
6
D5_6
5
D5_5
4
D5_4
3
D5_3
2
D5_2
1
D5_1
0
D5_0
Address
See
Table 11-17
Initial value
Undefined
7
D6_7
M_DATAn6
(n = 00 to 31)
6
D6_6
5
D6_5
4
D6_4
3
D6_3
2
D6_2
1
D6_1
0
D6_0
Address
See
Table 11-17
Initial value
Undefined
7
D7_7
M_DATAn7
(n = 00 to 31)
6
D7_6
5
D7_5
4
D7_4
3
D7_3
2
D7_2
1
D7_1
0
D7_0
Address
See
Table 11-17
Initial value
Undefined
Bit Position
Bit Name
Function
Indicates the contents of the message data.
7 to 0
D7_7 to
D0_0
Cautions 1. The M_DATAn0 to M_DATAn7 registers are fields used to hold receive
data and transmit data. When data is transmitted, the number of
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.
Remark
n = 00 to 31
Содержание V850E/IA1 mPD703116
Страница 2: ...2 User s Manual U14492EJ3V0UD MEMO...