Nuvoton /NUC1xx_registers /CAN /CAN_IF1_MCON

Data Length Code 0-8: Data Frame has 0-8 data bytes. 9-15: Data Frame has 8 data bytes Note: The Data Length Code of a Message Object must be defined the same as in all the corresponding objects with the same identifier at other nodes. When the Message Handler stores a data frame, it will write the DLC to the value given by the received message. Data 0: 1st data byte of a CAN Data Frame Data 1: 2nd data byte of a CAN Data Frame Data 2: 3rd data byte of a CAN Data Frame Data 3: 4th data byte of a CAN Data Frame Data 4: 5th data byte of a CAN Data Frame Data 5: 6th data byte of a CAN Data Frame Data 6: 7th data byte of a CAN Data Frame Data 7 : 8th data byte of a CAN Data Frame Note: The Data 0 Byte is the first data byte shifted into the shift register of the CAN Core during a reception while the Data 7 byte is the last. When the Message Handler stores a Data Frame, it will write all the eight data bytes into a Message Object. If the Data Length Code is less than 8, the remaining bytes of the Message Object will be overwritten by unspecified values.

End of Buffer 1 = Single Message Object or last Message Object of a FIFO Buffer. 0 = Message Object belongs to a FIFO Buffer and is not the last Message Object of that FIFO Buffer. Note: This bit is used to concatenate two or more Message Objects (up to 32) to build a FIFO Buffer. For single Message Objects (not belonging to a FIFO Buffer), this bit must always be set to one.

Transmit Request 1 = The transmission of this Message Object is requested and is not yet done. 0 = This Message Object is not waiting for transmission.

Remote Enable 1 = At the reception of a Remote Frame, TxRqst is set. 0 = At the reception of a Remote Frame, TxRqst is left unchanged.

Receive Interrupt Enable 1 = IntPnd will be set after a successful reception of a frame. 0 = IntPnd will be left unchanged after a successful reception of a frame.

Transmit Interrupt Enable 1 = IntPnd will be set after a successful transmission of a frame. 0 = IntPnd will be left unchanged after the successful transmission of a frame.

Use Acceptance Mask 1 = Use Mask (Msk28-0, MXtd, and MDir) for acceptance filtering. 0 = Mask ignored. Note: If the UMask bit is set to one, the Message Object’s mask bits have to be programmed during initialization of the Message Object before MsgVal is set to one.

Interrupt Pending 1 = This message object is the source of an interrupt. The Interrupt Identifier in the Interrupt Register will point to this message object if there is no other interrupt source with higher priority. 0 = This message object is not the source of an interrupt.

Message Lost (only valid for Message Objects with direction = receive) 1 = The Message Handler stored a new message into this object when NewDat was still set, the CPU has lost a message. 0 = No message lost since last time this bit was reset by the CPU.

New Data 1 = The Message Handler or the application software has written new data into the data portion of this Message Object. 0 = No new data has been written into the data portion of this Message Object by the Message Handler since last time this flag was cleared by the application software.