CHAPTER 11 FCAN CONTROLLER
534
User’s Manual U14492EJ3V0UD
<3> Control field
The control field sets “N” as the number of data bytes in the data field (N = 0 to 8).
r1 and r0 are fixed as dominant (D). The data length code bits (DLC3 to DLC0) set the byte count.
Remark
DLC3 to DLC0: Bits 3 to 0 in CAN message data length registers 00 to 31 (M_DLC00 to
M_DLC31) (see
11.10 (2)
)
Figure 11-12. Control Field
R
D
r1
(IDE)
r0
RTR
DLC2
DLC3
DLC1
DLC0
Control field
(Data field)
(Arbitration field)
In standard format mode, the arbitration field’s IDE bit is the same bit as the r1 bit.
Table 11-6. Data Length Code Settings
Data Length Code
DLC3
DLC2
DLC1
DLC0
Data Byte Count
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
Caution
In the remote frame, there is no data field even if the data length code is
not 0000B.
Содержание V850E/IA1 mPD703116
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