Figure 13.10 Transmit Message Cancellation Flowchart - Renesas H8SX/1500 Series Hardware Manual

Figure 13.10 shows a flowchart for transmit message cancellation.
Message transmit wait TXPR setting
Set TXCR bit corresponding to
message to be canceled
Cancellation possible?
End of transmission/transmission

Figure 13.10 Transmit Message Cancellation Flowchart

Yes
Message not sent
Clear TXCR, TXPR
ABACK = 1
IRR8 = 1
IMR8 = 1?
No
Interrupt to CPU
Clear TXACK
Clear ABACK
Clear IRR8
cancellation
Section 13 Controller Area Network (HCAN)
: Settings by user
: Processing by hardware
No
Completion of message transmission
TXACK = 1
Clear TXCR, TXPR
IRR8 = 1
Yes
Rev. 3.00 Mar. 14, 2006 Page 493 of 804
REJ09B0104-0300