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November, 2018 Rev.1.4
10.7 Multiple Interrupts
If more than two interrupts are requested simultaneously, one of higher priority level is serviced first
and others remain pending. Among pending interrupts, the interrupt of second highest priority is
serviced next after executing current interrupt service.
In addition, as shown in Figure 10-6, another interrupt request can be serviced while servicing
previously requested interrupt. In this case, interrupt requested later must have higher priority level
and the interrupt handler should allow another interrupt request.
The following example shows how to allow INT0 interrupt request while executing INT1 interrupt
service routine. In this example, INT0 has higher group priority than INT1 interrupt according to IP0,
EA & INTnE set
Next Instruction
Next Instruction
Setting both EA bit and individual interrupt
enable bit INTnE makes the pending interrupt
active after executing the next instruction.
Figure 10-4 Effective time of interrupt request after setting IEx registers
Figure 10-5 Accept of another interrupt request in interrupt service routine
Main Program
Service
INT1 Interrupt
Occur
INT1 ISR
EA = 1
Enable INT0
INT0 Interrupt
Occur
INT0 ISR
RETI
RETI
Содержание MC96FR364B
Страница 17: ...MC96FR364B November 2018 Rev 1 4 17 4 PACKAGE DIMENSION...
Страница 18: ...MC96FR364B 18 November 2018 Rev 1 4 Figure 4 1 PKG DIMENSION 28 TSSOP...
Страница 23: ...MC96FR364B November 2018 Rev 1 4 23 6 3 REMOUT Port Data PAD VDD Figure 6 3 REMOUT port...
Страница 69: ...November 2018 Rev 1 4 69 Initial value 00H BIT 7 0 BIT counter value...
