NEC V850ES/F 3-L Series User Manual page 642

Chapter 18
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
Figure 18-40
Caution
642
Figure 18-40 shows the processing for a transmit message buffer (MT[2:0] bits
of CnMCONFm register = 000
Clear RDY bit Clear RDY bit
Data frame Data frame
Data frame or remote frame? Data frame or remote frame?
Set RDY bit Set RDY bit
Set TRQ bit Set TRQ bit
Message transmit processing
1. The TRQ bit should be set after the RDY bit is set.
2. The RDY bit and TRQ bit should not be set at the same time.
User's Manual U18743EE1V2UM00
).
B
START START
No No
TRQ = 0? TRQ = 0?
Yes Yes
No No
RDY = 0? RDY = 0?
Yes Yes
Remote frame Remote frame
Set CnMDLCm register Set CnMDLCm register
Set RTR bit of CnMCONFm Set RTR bit of CnMCONFm
register register
Set CnMIDLm and CnMIDHm Set CnMIDLm and CnMIDHm
registers registers
END END
CAN Controller (CAN)