Can Message Data Registers N0 To N7 (M_Datan0 To M_Datan7) - NEC Renesas V850/SC1 User Manual

19.5.4

CAN message data registers n0 to n7 (M_DATAn0 to M_DATAn7)

The M_DATAn0 to M_DATAn7 registers are areas where up to 8 bytes of transmit or receive message data is
stored.
These registers can be read/written in 8-bit units.
The M_DATAn0 to M_DATAn7 registers are used to hold receive message data and transmit message 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.
When the M_CTRLn register's ATS bit has been set (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.
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 on the CAN bus may
be updated, but they are ignored.
Remark n = 00 to 31, x = 0 to 7
7
M_DATAn0 D07 D06
(n = 00 to 31)
7
M_DATAn1 D17 D16
(n = 00 to 31)
7
M_DATAn2 D27 D26
(n = 00 to 31)
7
M_DATAn3 D37 D36
(n = 00 to 31)
7
M_DATAn4 D47 D46
(n = 00 to 31)
7
M_DATAn5 D57 D56
(n = 00 to 31)
7
M_DATAn6 D67 D66
(n = 00 to 31)
7
M_DATAn7 D77 D76
(n = 00 to 31)
CHAPTER 19 FCAN CONTROLLER (V850/SC3)
6 5 4
D05 D04
6 5 4
D15 D14
6 5 4
D25 D24
6 5 4
D35 D34
6 5 4
D45 D44
6 5 4
D55 D54
6 5 4
D65 D64
6 5 4
D75 D74
User's Manual U15109EJ3V0UD
3 2 1
D03 D02 D01
3 2 1
D13 D12 D11
3 2 1
D23 D22 D21
3 2 1
D33 D32 D31
3 2 1
D43 D42 D41
3 2 1
D53 D52 D51
3 2 1
D63 D62 D61
3 2 1
D73 D72 D71
0 Address After reset
D00 See Table 19-6 Undefined
0 Address After reset
D10 See Table 19-6 Undefined
0 Address After reset
D20 See Table 19-6 Undefined
0 Address After reset
D30 See Table 19-6 Undefined
0 Address After reset
D40 See Table 19-6 Undefined
0 Address After reset
D50 See Table 19-6 Undefined
0 Address After reset
D60 See Table 19-6 Undefined
0 Address After reset
D70 See Table 19-6 Undefined
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