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21.7 Reception Flowchart of CAN Controller
Figure 21.7-1 shows a reception flowchart of the CAN controller.
■ Reception Flowchart of the CAN Controller
Figure 21.7-1 Reception Flowchart of the CAN Controller
RIEx?
1
0
NO
YES
NO
YES
RRTRx:=0 RRTRx:=1
TRTRx?
0
1
TREQx:=0
RCx:=1
RCx?
1
0
ROVRx:=1
Detection of start of data frame
or remote frame (SOF)
Is any message buffer (x) passing to
the acceptance filter found?
End of reception
Is reception
successful?
A reception interrupt
occurs.
Received message?
Data frame Remote frame
Store the received message
in the message buffer (x).
Determine message buffer (x) where
received messages to be stored.