NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 818 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
IFn Arbitration 2 Register (CAN_IFn_ARB2)
Register
Offset
R/W
Description
Reset Value
CAN_IFn_ARB2
0x34/0x94 R/W
IFn Arbitration Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
MsgVal
Xtd
Dir
ID[28:24]
7
6
5
4
3
2
1
0
ID[23:16]
Bits
Description
[31:16]
Reserved
Reserved.
[15]
MsgVal
Message Valid
0 = The Message Object is ignored by the Message Handler.
1 = The Message Object is configured and should be considered by the Message Handler.
Note:
The application software must reset the MsgVal bit of all unused Messages Objects
during the initialization before it resets bit Init in the CAN Control Register. This bit must also
be reset before the identifier Id28-0, the control bits Xtd, Dir, or the Data Length Code DLC3-
0 are modified, or if the Messages Object is no longer required.
[14]
Xtd
Extended Identifier
0 = The 11-
bit (“standard”) Identifier will be used for this Message Object.
1 = The 29-
bit (“extended”) Identifier will be used for this Message Object.
[13]
Dir
Message Direction
0 = Direction is receive.
On TxRqst, a Remote Frame with the identifier of this Message Object is transmitted. On
reception of a Data Frame with matching identifier, that message is stored in this Message
Object.
1 = Direction is transmit.
On TxRqst, the respective Message Object is transmitted as a Data Frame. On reception of a
Remote Frame with matching identifier, the TxRqst bit of this Message Object is set (if
RmtEn = one).
[12:0]
ID[28:16]
Message Identifier 28-16
ID28 - ID0, 29-
bit Identifier (“Extended Frame”).
ID28 - ID18, 11-
bit Identifier (“Standard Frame”)