LM3S9B81 Datasheet, PDF (794/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Controller Area Network (CAN) Module
Register 18: CAN IF1 Arbitration 2 (CANIF1ARB2), offset 0x034
Register 19: CAN IF2 Arbitration 2 (CANIF2ARB2), offset 0x094
These registers hold information for acceptance filtering.
CAN IF1 Arbitration 2 (CANIF1ARB2)
CAN0 base: 0x4004.0000
CAN1 base: 0x4004.1000
CAN2 base: 0x4004.2000
Offset 0x034
Type R/W, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MSGVAL XTD
DIR
ID
Type R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:16
15
14
Name
reserved
MSGVAL
XTD
Type
RO
R/W
R/W
Reset
0x0000
0
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Message Valid
Value
0
1
Description
The message object is ignored by the message handler.
The message object is configured and ready to be
considered by the message handler within the CAN
controller.
All unused message objects should have this bit cleared during
initialization and before clearing the INIT bit in the CANCTL register.
The MSGVAL bit must also be cleared before any of the following bits
are modified or if the message object is no longer required: the ID fields
in the CANIFnARBn registers, the XTD and DIR bits in the CANIFnARB2
register, or the DLC field in the CANIFnMCTL register.
Extended Identifier
Value
0
1
Description
An 11-bit Standard Identifier is used for this message
object.
A 29-bit Extended Identifier is used for this message
object.
794
June 29, 2010
Texas Instruments-Advance Information