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DCAN Control Registers
1483
SPNU563A–March 2018
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Controller Area Network (DCAN) Module
Table 27-27. IF1/IF2 Arbitration Register Field Descriptions
Bit Field Value Description
31 MsgVal Message valid
0 The message object is ignored by the Message Handler.
1 The message object is used by the Message Handler.
Note: The CPU should reset the MsgVal bit of all unused Messages Objects during the
initialization before it resets bit Init in the CAN Control Register. MsgVal must also be reset if
the messages object is no longer used in operation. For reconfiguration of message objects
during normal operation, see Section 27.7.6 and Section 27.7.7.
30 Xtd Extended identifier.
0 The 11-bit ("standard") identifier is used for this message object.
1 The 29-bit ("extended") identifier is used for this message object.
29 Dir Message direction.
0 Direction = Receive: On TxRqst, a Remote Frame with the identifier of this message object is
transmitted. On receiving a Data Frame with a matching identifier, this message is stored in this
message object.
1 Direction = Transmit: On TxRqst, the respective message object is transmitted as a Data
Frame. On receiving a Remote Frame with a matching identifier, the TxRqst bit of this message
object is set (if RmtEn = 1).
28-0 ID Message identifier.
ID[28:0] 29-bit Identifier ("Extended Frame").
ID[28:18] 11-bit Identifier ("Standard Frame").
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