Rev. 1.0, 09/02, page 392 of 568
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:
•
During internal arbitration or CAN bus arbitration
•
During data frame or remote frame transmission
Figure 15.10 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 15.10 Transmit Message Cancellation Flowchart
Содержание H8S/2627
Страница 22: ...Rev 1 0 09 02 page xx of xxxvi Index 565 ...
Страница 30: ...Rev 1 0 09 02 page xxviii of xxxiv ...
Страница 36: ...Rev 1 0 09 02 page xxxiv of xxxiv Table 23 9 Flash Memory Characteristics 561 ...
Страница 82: ...Rev 1 0 09 02 page 46 of 568 ...
Страница 88: ...Rev 1 0 09 02 page 52 of 568 ...
Страница 98: ...Rev 1 0 09 02 page 62 of 568 ...
Страница 156: ...Rev 1 0 09 02 page 120 of 568 ...
Страница 390: ...Rev 1 0 09 02 page 354 of 568 ...
Страница 480: ...Rev 1 0 09 02 page 444 of 568 ...
Страница 512: ...Rev 1 0 09 02 page 476 of 568 ...
Страница 527: ...Rev 1 0 09 02 page 491 of 568 21 8 5 Writing to MSTPCR MSTPCR should only be written to by the CPU ...
Страница 528: ...Rev 1 0 09 02 page 492 of 568 ...
Страница 580: ...Rev 1 0 09 02 page 544 of 568 ...