NEC V850E/Dx3 Preliminary User's Manual page 751

CAN Controller (CAN)
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Data frame
Clear RTR bit of
CnMDATAxm register,
CnMDLCm register,
and CnMCONFm register.
Set CnMIDLm and
CnMIDHm registers.
Figure 19-40 Transmission via interrupt (using CnLOPT register)
Caution The TRQ bit should be set after the RDY bit is set.
The RDY bit and TRQ bit should not be set at the same time.
Preliminary User's Manual U17566EE1V2UM00
Start
Transmit completion
interrupt processing
Read CnLOPT register.
Clear RDY bit.
Set RDY bit = 0
Clear RDY bit = 1
No
RDY bit = 0?
Yes
Data frame
Remote frame
or
remote frame?
Set RTR bit of
CnMDLCm register and
CnMCONFm register.
Set CnMIDLm and
CnMIDHm registers.
Set RDY bit.
Set RDY bit = 1
Clear RDY bit = 0
Set TRQ bit.
Set TRQ bit = 1
Clear TRQ bit = 0
END
Chapter 19
751