NEC V850ES/F 3-L Series User Manual page 644

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 18-42
Caution
Note
644
Transmit completion Transmit completion Transmit completion
interrupt processing interrupt processing interrupt processing
Read CnLOPT register Read CnLOPT register
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
Transmission via interrupt (using CnLOPT register)
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.
Also check the MBON flag at the beginning and at the end of the interrupt
routine, in order to check the access to the message buffers as well as TX
history list registers, in case a pending sleep mode had been executed. If
MBON is detected to be cleared at any check, the actions and results of the
processing have to be discarded and processed again, after MBON is set
again.
It is recommended to cancel any sleep mode requests, before processing TX
interrupts.
User's Manual U18743EE1V2UM00
START START
Clear RDY bit Clear RDY bit
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)