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MC96F6432A
ABOV Semiconductor Co., Ltd.
10.7 Multi Interrupt
If two different priority level requests are received simultaneously, the higher priority level request is serviced. If
requests of the interrupt are received at the same time, an interrupt polling sequence determines by hardware which
request is serviced. However, multiple processing is possible through software for special features.
Figure 10.6
Effective Timing of Multi-Interrupt
Figure 10.6 shows an example of multi-interrupt processing. While INT1 is served, INT0 which has higher priority than
INT1 is occurred. Then INT0 is served immediately and then the remain part of INT1 service routine is executed. If the
priority level of INT0 is same or lower than INT1, INT0 will be served after the INT1 service has completed.
An interrupt service routine may be only interrupted by an interrupt of higher priority and, if two interrupts of different
priority occur at the same time, the higher level interrupt will be served first. An interrupt cannot be interrupted by
another interrupt of the same or a lower priority level. If two interrupts of the same priority level occur simultaneously,
the service order for those interrupts is determined by the scan order.
Main Program
Service
Occur
INT1 Interrupt
INT1 ISR
Occur
INT0 Interrupt
INT0 ISR
RETI
RETI
Set EA
Содержание MC96F6332A
Страница 16: ...16 MC96F6432A ABOV Semiconductor Co Ltd 4 Package Diagram Figure 4 1 48 Pin QFN Package ...
Страница 17: ...17 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 2 44 Pin MQFP Package ...
Страница 18: ...18 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 3 32 Pin LQFP Package ...
Страница 19: ...19 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 4 32 Pin SOP Package ...
Страница 20: ...20 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 5 28 Pin SOP Package ...