38.5.11 Interrupts

The AC has the following interrupt sources:

• Comparator (COMP0, COMP1): Indicates a change in comparator status
• Window (WIN0): Indicates a change in the window status

Comparator interrupts are generated based on the conditions selected by the Interrupt Selection bit group in the Comparator Control registers (COMPCTRLx.INTSEL). Window interrupts are generated based on the conditions selected by the Window Interrupt Selection bit group in the Window Control register (WINCTRL.WINTSEL[1:0]).

Each interrupt source has an interrupt flag associated with it. The interrupt flag in the Interrupt Flag Status and Clear (INTFLAG) register is set when the interrupt condition occurs. Each interrupt can be individually enabled by writing a one to the corresponding bit in the Interrupt Enable Set (INTENSET) register and disabled by writing a one to the corresponding bit in the Interrupt Enable Clear (INTENCLR) register.

An interrupt request is generated when the interrupt flag is set and the corresponding interrupt is enabled. The interrupt request remains active until the interrupt flag is cleared, the interrupt is disabled or the AC is Reset. See INTFLAG register from Related Links for details on how to clear interrupt flags. All interrupt requests from the peripheral are OR'ed together on the system level to generate one combined interrupt request to the NVIC. The user must read the INTFLAG register to determine which interrupt condition is present. See Nested Vector Interrupt Controller (NVIC) from Related Links.