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CHAPTER 19 FCAN CONTROLLER (V850/SC3)
User’s Manual U15109EJ3V0UD
576
19.5 Control Registers
19.5.1
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 (1).
These registers can be read/written in 8-bit units.
After reset: Undefined
R/W
Address: See
Table 19-3
7
6
5
4
3
2
1
0
M_DLCn
RFU
Note
RFU
Note
RFU
Note
RFU
Note
DLC3
DLC2
DLC1
DLC0
(n = 00 to 31)
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 DLC value
Note
RFU (Reserved for Future Use) indicates a reserved bit. Always set this bit to 0 when
writing the M_DLCn register.
Table 19-3. Addresses of M_DLCn (n = 00 to 31)
Register Name
Address
Register Name
Address
M_DLC00
xx3FF804H
M_DLC16
xx3FFA04H
M_DLC01
xx3FF824H
M_DLC17
xx3FFA24H
M_DLC02
xx3FF844H
M_DLC18
xx3FFA44H
M_DLC03
xx3FF864H
M_DLC19
xx3FFA64H
M_DLC04
xx3FF884H
M_DLC20
xx3FFA84H
M_DLC05
xx3FF8A4H
M_DLC21
xx3FFAA4H
M_DLC06
xx3FF8C4H
M_DLC22
xx3FFAC4H
M_DLC07
xx3FF8E4H
M_DLC23
xx3FFAE4H
M_DLC08
xx3FF904H
M_DLC24
xx3FFB04H
M_DLC09
xx3FF924H
M_DLC25
xx3FFB24H
M_DLC10
xx3FF944H
M_DLC26
xx3FFB44H
M_DLC11
xx3FF964H
M_DLC27
xx3FFB64H
M_DLC12
xx3FF984H
M_DLC28
xx3FFB84H
M_DLC13
xx3FF9A4H
M_DLC29
xx3FFBA4H
M_DLC14
xx3FF9C4H
M_DLC30
xx3FFBC4H
M_DLC15
xx3FF9E4H
M_DLC31
xx3FFBE4H