NEC V850ES/F 3-L Series User Manual page 639

CAN Controller (CAN)
Figure 18-37
Caution
No No
Message buffer initialization
1. Before a message buffer is initialized, the RDY bit must be cleared.
2. Make the following settings for message buffers not used by the application.
• Clear the RDY, TRQ, and DN bits of the CnMCTRLm register to 0.
• Clear the MA0 bit of the CnMCONFm register to 0.
User's Manual U18743EE1V2UM00
START START
RDY = 1? RDY = 1?
Yes Yes
Clear RDY bit Clear RDY bit
RDY = 0? RDY = 0?
Yes Yes
Set Set
CnMCONFm register CnMCONFm register
Set Set
CnMIDHm register, CnMIDHm register,
CnMIDLm register CnMIDLm register
Transmit message buffer? Transmit message buffer?
Yes Yes
Set Set
CnMDLCm register CnMDLCm register
Clear Clear
CnMDATAm register CnMDATAm register
Set Set
CnMCTRLm register CnMCTRLm register
Set RDY bit Set RDY bit
END END
Chapter 18
No No
No No
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