NEC V850ES/F 3-L Series User Manual page 643

CAN Controller (CAN)
Figure 18-41
Note
Caution
Figure 18-41 shows the processing for a transmit message buffer (MT[2:0] bits
of CnMCONFm register = 000
ABT message transmit processing
This processing (normal operation mode with ABT) can only be applied to
message buffers 0 to 7. For message buffers other than the ABT message
buffers, see Figure 18-40 on page 642.
The ABTTRG bit should be set to 1 after the TSTAT bit is cleared to 0.
Checking the TSTAT bit and setting the ABTTRG bit to 1 must be processed
consecutively.
User's Manual U18743EE1V2UM00
)
B
START START
ABTTRG = 0? ABTTRG = 0?
Yes Yes
Clear RDY bit Clear RDY bit
RDY = 0? RDY = 0?
Yes Yes
Set CnMDATAxm register Set CnMDATAxm register
Set CnMDLCm register Set CnMDLCm register
Clear RTR bit of CnMCONFm Clear RTR bit of CnMCONFm
register register
Set CnMIDLm and CnMIDHm Set CnMIDLm and CnMIDHm
registers registers
Set RDY bit Set RDY bit
Set all ABT transmit messages? Set all ABT transmit messages?
Yes Yes
TSTAT = 0? TSTAT = 0?
Yes Yes
Set ABTTRG bit Set ABTTRG bit
END END
Chapter 18
No No
No No
No No
No No
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