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<div class="headertitle"><div class="title">Interrupt </div></div>
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<div class="textblock"><p><a class="anchor" id="md_docs_doxygen_om6626_user_guides_interrupt"></a></p>
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<h1><a class="anchor" id="autotoc_md67"></a>
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NVIC Nested Vectored Interrupt Controller (NVIC)</h1>
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<p>NVIC features:</p><ul>
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<li>16 Cortex-M4 exceptions, 34 maskable interrupt channels</li>
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<li>16 programmable priority levels</li>
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<li>Support vector table relocation</li>
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<li>Low-latency exception and interrupt handling</li>
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<li>Implementation of System Control Registers</li>
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</ul>
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<p>The NVIC and the processor core interface are closely coupled, which enables low latency interrupt processing and efficient processing of late arriving interrupts. All interrupts including the core exceptions are managed by the NVIC.</p>
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<h1><a class="anchor" id="autotoc_md68"></a>
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Interrupt Vector Table</h1>
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<table class="markdownTable">
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<tr class="markdownTableHead">
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<th class="markdownTableHeadNone">Exception Number </th><th class="markdownTableHeadNone">NVIC Number </th><th class="markdownTableHeadNone">Exception Type </th><th class="markdownTableHeadNone">Description </th></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">1 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Reset </td><td class="markdownTableBodyNone">Reset </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">2 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">NMI </td><td class="markdownTableBodyNone">Nonmaskable interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">3 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Hard Fault </td><td class="markdownTableBodyNone">All fault conditions if the corresponding fault handler is not enabled </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">4 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Mem Fault </td><td class="markdownTableBodyNone">Memory management fault; Memory Protection Unit (MPU) violation or access to illegal locations </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">5 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Bus Fault </td><td class="markdownTableBodyNone">Bus error </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">6 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Usage Fault </td><td class="markdownTableBodyNone">Exceptions resulting from program error </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">7 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Soft Fault </td><td class="markdownTableBodyNone">Software error </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">11 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">SVC </td><td class="markdownTableBodyNone">Supervisor Call </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">12 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">Debug Monitor </td><td class="markdownTableBodyNone">Debug monitor (breakpoints, watch points, or external debug requests) </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">14 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">PendSV </td><td class="markdownTableBodyNone">Pendable Service Call </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">15 </td><td class="markdownTableBodyNone">X </td><td class="markdownTableBodyNone">SYSTICK </td><td class="markdownTableBodyNone">System Tick Timer </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">16 </td><td class="markdownTableBodyNone">0 </td><td class="markdownTableBodyNone">BT BB COMBO </td><td class="markdownTableBodyNone">BLE event </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">17 </td><td class="markdownTableBodyNone">1 </td><td class="markdownTableBodyNone">BB_NATIVE_INT </td><td class="markdownTableBodyNone">Baseband sleep wake </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">18 </td><td class="markdownTableBodyNone">2 </td><td class="markdownTableBodyNone">DMA COMBO </td><td class="markdownTableBodyNone">DMA interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">19 </td><td class="markdownTableBodyNone">3 </td><td class="markdownTableBodyNone">PIN_WAKEUP_INT </td><td class="markdownTableBodyNone">GPIO wakeup interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">20 </td><td class="markdownTableBodyNone">4 </td><td class="markdownTableBodyNone">TIMER COMBO </td><td class="markdownTableBodyNone">Timer interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">21 </td><td class="markdownTableBodyNone">5 </td><td class="markdownTableBodyNone">2P4G_RF_IRQ </td><td class="markdownTableBodyNone">Proprietary 2.4G protocol interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">22 </td><td class="markdownTableBodyNone">6 </td><td class="markdownTableBodyNone">PMU_POF_INT </td><td class="markdownTableBodyNone">Flash low voltage interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">23 </td><td class="markdownTableBodyNone">7 </td><td class="markdownTableBodyNone">PMU_TIMER </td><td class="markdownTableBodyNone">System timer </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">24 </td><td class="markdownTableBodyNone">8 </td><td class="markdownTableBodyNone">WDT_INT </td><td class="markdownTableBodyNone">Watch dog interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">25 </td><td class="markdownTableBodyNone">9 </td><td class="markdownTableBodyNone">UART1 COMBO </td><td class="markdownTableBodyNone">UART1 global interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">26 </td><td class="markdownTableBodyNone">10 </td><td class="markdownTableBodyNone">EFUSE_INT </td><td class="markdownTableBodyNone">EFUSE interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">27 </td><td class="markdownTableBodyNone">11 </td><td class="markdownTableBodyNone">GPIO COMBO </td><td class="markdownTableBodyNone">GPIO interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">28 </td><td class="markdownTableBodyNone">12 </td><td class="markdownTableBodyNone">ADC </td><td class="markdownTableBodyNone">GPADC interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">29 </td><td class="markdownTableBodyNone">13 </td><td class="markdownTableBodyNone">I2C_INT </td><td class="markdownTableBodyNone">I2C interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">30 </td><td class="markdownTableBodyNone">14 </td><td class="markdownTableBodyNone">SFLASH INT </td><td class="markdownTableBodyNone">SFLASH control interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">31~38 </td><td class="markdownTableBodyNone">15~22 </td><td class="markdownTableBodyNone">SOFT_INT </td><td class="markdownTableBodyNone">Soft interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">40 </td><td class="markdownTableBodyNone">24 </td><td class="markdownTableBodyNone">CRY32M_DIG_READY </td><td class="markdownTableBodyNone">32M crystal oscillator can give digital flag </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">41 </td><td class="markdownTableBodyNone">25 </td><td class="markdownTableBodyNone">UART0 INT </td><td class="markdownTableBodyNone">UART0 interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">42 </td><td class="markdownTableBodyNone">26 </td><td class="markdownTableBodyNone">SPI0_INT </td><td class="markdownTableBodyNone">SPI0 interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">43~46 </td><td class="markdownTableBodyNone">28~30 </td><td class="markdownTableBodyNone">TIMER </td><td class="markdownTableBodyNone">Timers global interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">47 </td><td class="markdownTableBodyNone">31 </td><td class="markdownTableBodyNone">SPI1 INT </td><td class="markdownTableBodyNone">SPI1 interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">48 </td><td class="markdownTableBodyNone">32 </td><td class="markdownTableBodyNone">RTC_1HZ_INT </td><td class="markdownTableBodyNone">RTC 1HZ interrupt </td></tr>
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<tr class="markdownTableRowEven">
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<td class="markdownTableBodyNone">49 </td><td class="markdownTableBodyNone">33 </td><td class="markdownTableBodyNone">RTC_AF_INT </td><td class="markdownTableBodyNone">RTC alarm interrupt </td></tr>
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<tr class="markdownTableRowOdd">
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<td class="markdownTableBodyNone">50 </td><td class="markdownTableBodyNone">34 </td><td class="markdownTableBodyNone">LP_TIMER_INT </td><td class="markdownTableBodyNone">LP timer interrupt </td></tr>
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