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Chapter 16
FCAN Controller
User’s Manual U16702EE3V2UD00
In the normal operation with ABT, to abort transmit except transmission with ABT, using this processing
flow.
Figure 16-68:
Transmission Abort Processing Except for ABT Transmission
(Normal Operation Mode with ABT)
Cautions: 1. Execute transmission request abort processing by clearing the TRQ bit, not the
RDY bit.
2. Before making a sleep mode transition request, confirm that there is no transmis-
sion request left using this processing.
3. The TSTAT bit can be periodically checked by a user application or can be
checked after the transmit completion interrupt.
4. Do not execute a new transmission request that includes other message buffers
while transmission request abort processing is in progress.
START
Read CnLOPT register
END
No
Yes
Clear TRQ bit
CnMCTRLm.SET_TRQ = 0
CnMCTRLm.CLEAR_TRQ = 1
TSTAT = 0?
Message buffer to
be aborted matches CnLOPT
register?
No
Wait for 11 CAN data bits
Transmission successful
Transmit abort request
was successful
Yes
No
ABTTRG = 0?
Clear ABTTRG bit
CnGMABT.SET_ABTTRG = 0
CnGMABT.CLEAR_ABTTRG = 1
Yes
a
T
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