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M32C/86 датащи(PDF) 135 Page - Renesas Technology Corp |
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M32C/86 датащи(HTML) 135 Page - Renesas Technology Corp |
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135 / 505 page ![]() Page 112 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R 11. Interrupts ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M 11.6.8 Interrupt Priority If two or more interrupt requests are sampled at the same sampling points (a timing to detect whether an interrupt request is generated or not), the interrupt with the highest priority is acknowledged. Set the ILVL2 to ILVL0 bits to select the desired priority level for maskable interrupts (peripheral function interrupt). Priority levels of special interrupts such as reset (reset has the highest priority) and watchdog timer are set by hardware. Figure 11.8 shows priority levels of hardware interrupts. The interrupt priority does not affect software interrupts. Executing instruction causes the microcomputer to execute an interrupt routine. Oscillation Stop Detection _______ Reset > NMI > Watchdog > Peripheral Function > Address Match Low voltage Detection(1) NOTES: 1. Low voltage detection interrupt cannot be used in M32C/86T. Figure 11.8 Interrupt Priority 11.6.9 Interrupt Priority Level Select Circuit The interrupt priority level select circuit selects the highest priority interrupt when two or more interrupt requests are sampled at the same sampling point. Figure 11.9 shows the interrupt priority level select circuit. |
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