NEC V850E/RS1 User Manual page 662

Cautions: 1. Before a message buffer is initialized, the RDY bit must be cleared.
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Chapter 16 FCAN Controller
Figure 16-59: Message Buffer Initialization
No
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 U16702EE3V2UD00
START
RDY = 1?
Yes
Clear RDY bit.
Set RDY bit = 0
Clear RDY bit = 1
No
RDY = 0?
Yes
Set
CnMCONFm register
Set
CnMIDHm register
CnMIDLm register
No
Transmit message
buffer?
Yes
Set
CnMDLCm register
Clear
CnMDATAm register.
Set
CnMCTRLm register.
Set RDY bit.
Set RDY bit = 1
Clear RDY bit = 0
END