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M16C/5L Group, M16C/56 Group
The previous value of each mailbox is retained unless a new message is received.
23.1.7.1
EID Bit
The EID bit sets the extended ID of data frames and remote frames. This bit is used to transmit or
receive extended ID messages.
23.1.7.2
SID Bit
The SID bit sets the standard ID of data frames and remote frames. This bit is used to transmit or
receive both standard ID and extended ID messages.
23.1.7.3
RTR Bit
The RTR bit sets the frame format of data frames or remote frames.
This bit specifies the following operation:
• Receive mailbox receives only frames with the format specified by the RTR bit.
• Transmit mailbox transmits according to the frame format specified by the RTR bit.
• Receive FIFO mailbox receives the data frame, remote frame, or both frames specified by the RTR
bit in registers C0FIDCR0 and C0FIDCR1.
• Transmit FIFO mailbox transmits the data frame or remote frame specified by the RTR bit in the
relevant transmitting message.
23.1.7.4
IDE Bit
The IDE bit sets the ID format of standard IDs or extended IDs.
This bit is enabled when the IDFM bit in the C0CTLR register is 10b (mixed ID mode).
When the IDFM bit is 10b, the IDE bit specifies the following operation:
• Receive mailbox receives only the ID format specified by the IDE bit.
• Transmit mailbox transmits according to the ID format specified by the IDE bit.
• Receive FIFO mailbox receives messages with the standard ID, extended ID, or both IDs specified
by the IDE bit in registers C0FIDCR0 and C0FIDCR1.
• Transmit FIFO mailbox transmits messages with the standard ID or extended ID specified by the
IDE bit in the relevant transmitting message.
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
23. CAN Module
Page 563 of 803
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