RL78/F13, F14 CHAPTER 18 CAN INTERFACE (RS-CAN LITE)
R01UH0368EJ0210 Rev.2.10 1411
Dec 10, 2015
Figure 18-23. Receive Buffer Reception Timing Chart
(1) When the ID field in a message has been received, the acceptance filter processing starts.
(2) When the message matches the receive rule of the corresponding channel and the message has been successfully
received, the routing processing to transfer the message to the specified buffer starts. When the DCE bit in the
GCFGL register is set to 1 (DLC check is enabled), the DLC filter processing starts at this time.
(3) When the message has passed through the DLC filter processing, the processing to store the message in the
specified receive buffer starts.
When the message storage processing starts, the corresponding RMNSn flag in the RMND0 register is set to 1
(receive buffer n contains a new message (n = 0 to 15)). If other channels are performing filter processing or
transmit priority determination processing, the routing processing and the storage processing may be delayed.
(4) When the ID field of the next message has been received, the acceptance filter processing starts.
(5) When the message matches the receive rule of the corresponding channel and the message has been successfully
received, the routing processing to transfer the message to the specified buffer starts. When the DCE bit in the
GCFGL register is set to 1 (DLC check is enabled), the DLC filter processing starts at this time.
(6) When the corresponding RMNSn flag is cleared to 0 (receive buffer n contains no new message (n = 0 to 15)), this
flag is set to 1 again when the message storage processing starts. Even if the RMNSn flag remains 1, a new
message is overwritten to the receive buffer. The RMNSn flag should not be cleared to 0 during storage of
messages.
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