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ST7FOXK2 数据表(PDF) 55 Page - STMicroelectronics |
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ST7FOXK2 数据表(HTML) 55 Page - STMicroelectronics |
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55 / 226 page  ST7FOXF1, ST7FOXK1, ST7FOXK2 Interrupts 55/226 7.4 Concurrent and nested management The following Figure 20 and Figure 21 show two different interrupt management modes. The first is called concurrent mode and does not allow an interrupt to be interrupted, unlike the nested mode in Figure 21. The interrupt hardware priority is given in this order from the lowest to the highest: MAIN, IT5, IT4, IT3, IT2, IT1, IT0. The software priority is given for each interrupt. Caution: A stack overflow may occur without notifying the software of the failure. Figure 20. Concurrent interrupt management Figure 21. Nested interrupt management MAIN IT5 IT3 IT2 IT0 IT2 MAIN IT1 I1 SOFTWARE 3 3 3 3 3 3/0 3 11 11 11 11 11 11 / 10 11 RIM IT4 I0 10 PRIORITY LEVEL MAIN IT2 TLI MAIN IT0 3 2 1 3 3 3/0 3 11 00 01 11 11 11 RIM IT1 IT4 IT4 IT1 IT2 IT3 I1 I0 11 / 10 10 SOFTWARE PRIORITY LEVEL |
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