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Section 13 Controller Area Network (HCAN)
Rev. 3.00 Mar. 14, 2006 Page 493 of 804
REJ09B0104-0300
Figure 13.10 shows a flowchart for transmit message cancellation.
Message transmit wait TXPR setting
Yes
No
Yes
No
: Settings by user
: Processing by hardware
Set TXCR bit corresponding to
message to be canceled
Message not sent
Clear TXCR, TXPR
ABACK = 1
IRR8 = 1
Clear TXACK
Clear ABACK
Clear IRR8
Completion of message transmission
TXACK = 1
Clear TXCR, TXPR
IRR8 = 1
Cancellation possible?
IMR8 = 1?
End of transmission/transmission
cancellation
Interrupt to CPU
Figure 13.10 Transmit Message Cancellation Flowchart
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