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Chapter 16
FCAN Controller
User’s Manual U16702EE3V2UD00
Figure 16-62 shows the processing for a transmit message buffer (MT[2:0] bits of CnMCONFm
register = 000B).
Figure 16-62:
Message Transmit Processing (Normal Operation Mode)
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.
START
END
TRQ = 0?
No
Yes
Clear RDY bit
CnMCTRLm.SET_RDY = 0
CnMCTRLm.CLEAR_RDY = 1
RDY = 0?
Data frame or remote frame?
Set RDY bit
CnMCTRLm.SET_RDY = 1
CnMCTRLm.CLEAR_RDY = 0
Yes
No
Set CnMDATAxm register
Set CnMDLCm register
Clear RTR bit of CnMCONFm
register
Set CnMIDLm and CnMIDHm
registers
Set CnMDLCm register
Set RTR bit of CnMCONFm
register
Set CnMIDLm and CnMIDHm
registers
Set TRQ bit
CnMCTRLm.SET_TRQ = 1
CnMCTRLm.CLEAR_TRQ = 0
Remote frame
Data frame
r r
_R
n
r
r
L
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