CHAPTER 11 FCAN CONTROLLER
550
User’s Manual U14492EJ3V0UD
(2) CAN message data length registers 00 to 31 (M_DLC00 to M_DLC31)
The M_DLCn register sets the byte count in the data field of CAN message buffer n (n = 00 to 31). When
receiving, the receive data field’s byte count is set (to 1).
These registers can be read/written in 8-bit units.
Caution
When receiving a remote frame with an extended ID and storing it in the receive message
buffer, the values of DLC3 to DLC0 in the message buffer are cleared to 0 regardless of the
values of DLC3 to DLC0 on the CAN bus.
7
0
M_DLCn
(n = 00 to 31)
6
0
5
0
4
0
3
DLC3
2
DLC2
1
DLC1
0
DLC0
Address
See
Table 11-14
Initial value
Undefined
Bit Position
Bit Name
Function
Control field data for setting the number of bytes in the data field
DLC3
DLC2
DLC1
DLC0
Data Length Code of Transmit/Receive
Message
0
0
0
0
0 bytes
0
0
0
1
1 byte
0
0
1
0
2 bytes
0
0
1
1
3 bytes
0
1
0
0
4 bytes
0
1
0
1
5 bytes
0
1
1
0
6 bytes
0
1
1
1
7 bytes
1
0
0
0
8 bytes
Other than above
8 bytes regardless of the values of
DLC3 to DLC0
3 to 0
DLC3 to
DLC0
Содержание V850E/IA1 mPD703116
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