h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 448

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Controller Area Network (HCAN)
interrupt mask register (MBIMR) and the mailbox empty interrupt bit (IRR8) in the interrupt mask
register (IMR) are both simultaneously set to enable interrupts, interrupts may be sent to the CPU.
However, a transmit wait message cannot be canceled at the following times:
Figure 15.10 shows a flowchart for transmit message cancellation.
Rev. 3.00 Oct 04, 2005 page 408 of 598
REJ09B0155-0300
During internal arbitration or CAN bus arbitration
During data frame or remote frame transmission
Message transmit wait TXPR setting
End of transmission/transmission
Set TXCR bit corresponding to
Figure 15.10 Transmit Message Cancellation Flowchart
message to be canceled
Cancellation possible?
Clear TXCR, TXPR
Message not sent
Interrupt to CPU
Clear ABACK
Clear TXACK
cancellation
ABACK = 1
Clear IRR8
IMR8 = 1?
IRR8 = 1
Yes
No
Yes
Completion of message transmission
No
Clear TXCR, TXPR
TXACK = 1
IRR8 = 1
: Settings by user
: Processing by hardware