9.2 Interrupt Vector Mapping

Each of the interrupt vectors is connected to one peripheral instance, as shown in the table below. A peripheral can have one or more interrupt sources. For more details on the available interrupt sources, see the Interrupt section in the Functional Description of the respective peripheral.

An interrupt flag is set in the peripheral’s Interrupt Flags (peripheral.INTFLAGS) register when the interrupt condition occurs, even if the interrupt is not enabled.

An interrupt is enabled or disabled by writing to the corresponding interrupt enable bit in the peripheral’s Interrupt Control (peripheral.INTCTRL) register.

An interrupt request is generated when the corresponding interrupt is enabled, and the interrupt flag is set. Interrupts must be enabled globally for an interrupt request to be generated. The interrupt request remains active until the interrupt flag is cleared. See the peripheral’s INTFLAGS register for details on how to clear interrupt flags.

Table 9-3. Interrupt Vector Mapping
Vector Number	Program Address (word)	Peripheral Source (name)	Description	14-Pin	20-Pin
0	0x00	RESET		X	X
1	0x02	NMI	Non-Maskable Interrupt available for: CRCSCAN CFD (Clock Failure Detection)	X	X
2	0x04	BOD_VLM	Voltage Level Monitor Interrupt	X	X
3	0x06	CLKCTRL	External Crystal Oscillator/Clock Source Failure Interrupt (CFD)	X	X
4	0x08	MVIO_MVIO	Multi Voltage I/O Interrupt	X	X
5	0x0A	RTC_CNT	Real-Time Counter Overflow or Compare Match Interrupt	X	X
6	0x0C	RTC_PIT	Real-Time Counter Periodic Interrupt	X	X
7	0x0E	CCL_CCL	Configurable Custom Logic Interrupt	X	X
8	0x10	PORTA_PORT	PORTA External interrupt	X	X
9	0x12	TCA0 _OVF TCA0_LUNF	Normal: Timer/Counter Type A Overflow Interrupt Split: Timer/Counter Type A Low Underflow Interrupt	X	X
10	0x14	TCA0_HUNF	Normal: Unused Split: Timer/Counter Type A High Underflow Interrupt	X	X
11	0x16	TCA0_CMP0 TCA0_LCMP0	Normal: Timer/Counter Type A Compare 0 Interrupt Split: Timer/Counter Type A Low Compare 0 Interrupt	X	X
12	0x18	TCA0_CMP1 TCA0_LCMP1	Normal: Timer/Counter Type A Compare 1 Interrupt Split: Timer/Counter Type A Low Compare 1 Interrupt	X	X
13	0x1A	TCA0_CMP2 TCA0_LCMP2	Normal: Timer/Counter Type A Compare 2 Interrupt Split: Timer/Counter Type A Low Compare 2 Interrupt	X	X
14	0x1C	TCB0_INT	Timer Counter Type B Capture/Overflow Interrupt	X	X
15	0x1E	TCB1_INT	Timer Counter Type B Capture/Overflow Interrupt	X	X
16	0x20	TCD0_OVF	Timer Counter Type D Overflow Interrupt	X	X
17	0x22	TCD0_TRIG	Timer Counter Type D Trigger Interrupt	X	X
18	0x24	TWI0_TWIS	Two-Wire Interface Client Interrupt	X	X
19	0x26	TWI0_TWIM	Two-Wire Interface Host Interrupt	X	X
20	0x28	SPI0_INT	Serial Peripheral Interface Interrupt	X	X
21	0x2A	USART0_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt	X	X
22	0x2C	USART0_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt	X	X
23	0x2E	USART0_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt	X	X
24	0x30	PORTD_PORT	PORTD External Interrupt	X	X
25	0x32	AC0_AC	Analog Comparator Interrupt	X	X
26	0x34	ADC0_RESRDY	Analog-to-Digital Converter Result Ready Interrupt	X	X
27	0x36	ADC0_WCMP	Analog-to-Digital Converter Window Compare Interrupt	X	X
28	0x38	ZCD3_ZCD	Zero-Cross Interrupt	X	X
29	0x3A	PORTC_PORT	PORTC External Interrupt
30	0x3C	Reserved	Reserved	X	X
31	0x3E	USART1_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt	X	X
32	0x40	USART1_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt	X	X
33	0x42	USART1_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt	X	X
34	0x44	PORTF_PORT	PORTF External Interrupt	X	X
35	0x46	NVMCTRL_EE	Nonvolatile Memory Controller EEPROM Ready Interrupt	X	X