Figure 18-41: Abt Message Transmit Processing - NEC V850E/PH2 User Manual

<~Reference>Figure 18-41 shows the processing for a transmit message buffer (MT[2:0] bits of
CnMCONFm register = 000B)
Note: 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 <~Reference>Figure 18-40 on
page 845.
Caution
846
Chapter 18 AFCAN Controller

Figure 18-41: ABT Message transmit processing

START START
ABTTRG = 0? ABTTRG = 0?
Clear RDY bit Clear RDY bit
RDY = 0? RDY = 0?
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?
TSTAT = 0? TSTAT = 0?
Set ABTTRG bit Set ABTTRG bit
END END
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 U16580EE3V1UD00
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