8.2 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 Interrupt Flags register of the peripheral (peripheral.INTFLAGS) 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 register (peripheral.INTCTRL).

An interrupt request is generated when the corresponding interrupt is enabled, and the interrupt flag is set. Interrupts must be enabled globally for interrupt requests 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 8-3. Interrupt Vector Mapping
Vector Number	Program Address (word)	Peripheral Source	Description	28- Pin	32- Pin	48- Pin	64- Pin
0	0x00	RESET		X	X	X	X
1	0x02	NMI	Non-Maskable Interrupt available for CRCSCAN	X	X	X	X
2	0x04	BOD_VLM	Voltage Level Monitor Interrupt	X	X	X	X
3	0x06	RTC_CNT	Real-Time Counter Overflow or Compare Match Interrupt	X	X	X	X
4	0x08	RTC_PIT	Real-Time Counter Periodic Interrupt	X	X	X	X
5	0x0A	CCL_CCL	Configurable Custom Logic Interrupt	X	X	X	X
6	0x0C	PORTA_PORT	PORTA External interrupt	X	X	X	X
7	0x0E	TCA0 _OVF TCA0_LUNF	Normal: Timer/Counter Type A Overflow Interrupt Split: Timer/Counter Type A Low Underflow Interrupt	X	X	X	X
8	0x10	TCA0_HUNF	Normal: Unused Split: Timer/Counter Type A High Underflow Interrupt	X	X	X	X
9	0x12	TCA0_CMP0 TCA0_LCMP0	Normal: Timer/Counter Type A Compare 0 Interrupt Split: Timer/Counter Type A Low Compare 0 Interrupt	X	X	X	X
10	0x14	TCA0_CMP1 TCA0_LCMP1	Normal: Timer/Counter Type A Compare 1 Interrupt Split: Timer/Counter Type A Low Compare 1 Interrupt	X	X	X	X
11	0x16	TCA0_CMP2 TCA0_LCMP2	Normal: Timer/Counter Type A Compare 2 Interrupt Split: Timer/Counter Type A Low Compare 2 Interrupt	X	X	X	X
12	0x18	TCB0_INT	Timer Counter Type B Capture/Overflow Interrupt	X	X	X	X
13	0x1A	TCB1_INT	Timer Counter Type B Capture/Overflow Interrupt	X	X	X	X
14	0x1C	TCD0_OVF	Timer Counter Type D Overflow Interrupt	X	X	X	X
15	0x1E	TCD0_TRIG	Timer Counter Type D Trigger Interrupt	X	X	X	X
16	0x20	TWI0_TWIS	Two-Wire Interface Client Interrupt	X	X	X	X
17	0x22	TWI0_TWIM	Two-Wire Interface Host Interrupt	X	X	X	X
18	0x24	SPI0_INT	Serial Peripheral Interface Interrupt	X	X	X	X
19	0x26	USART0_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt	X	X	X	X
20	0x28	USART0_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt	X	X	X	X
21	0x2A	USART0_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt	X	X	X	X
22	0x2C	PORTD_PORT	PORTD External Interrupt	X	X	X	X
23	0x2E	AC0_AC	Analog Comparator Interrupt	X	X	X	X
24	0x30	ADC0_RESRDY	Analog-to-Digital Converter Result Ready Interrupt	X	X	X	X
25	0x32	ADC0_WCMP	Analog-to-Digital Converter Window Compare Interrupt	X	X	X	X
26	0x34	ZCD0_ZCD	Zero-Cross Interrupt	X	X	X	X
27	0x36	PTC_PTC	Peripheral Touch Controller Interrupt	X	X	X	X
28	0x38	AC1_AC	Analog Comparator Interrupt	X	X	X	X
29	0x3A	PORTC_PORT	PORTC External Interrupt	X	X	X	X
30	0x3C	TCB2_INT	Timer Counter Type B Capture/Overflow Interrupt	X	X	X	X
31	0x3E	USART1_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt	X	X	X	X
32	0x40	USART1_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt	X	X	X	X
33	0x42	USART1_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt	X	X	X	X
34	0x44	PORTF_PORT	PORTF External Interrupt	X	X	X	X
35	0x46	NVMCTRL_EE	Nonvolatile Memory Controller EEPROM Ready Interrupt	X	X	X	X
36	0x48	SPI1_INT	Serial Peripheral Interface Interrupt	X	X	X	X
37	0x4A	USART2_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt	X	X	X	X
38	0x4C	USART2_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt	X	X	X	X
39	0x4E	USART2_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt	X	X	X	X
40	0x50	AC2_AC	Analog Comparator Interrupt	X	X	X	X
41	0x52	TCB3_INT	Timer Counter Type B Capture/Overflow Interrupt			X	X
42	0x54	TWI1_TWIS	Two-Wire Interface Client Interrupt		X	X	X
43	0x56	TWI1_TWIM	Two-Wire Interface Host Interrupt		X	X	X
44	0x58	PORTB_PORT	PORTB External Interrupt			X	X
45	0x5A	PORTE_PORT	PORTE External Interrupt			X	X
46	0x5C	TCA1 _OVF TCA1_LUNF	Normal: Timer/Counter Type A Overflow Interrupt Split: Timer/Counter Type A Low Underflow Interrupt			X	X
47	0x5E	TCA1_HUNF	Normal: Unused Split: Timer/Counter Type A High Underflow Interrupt			X	X
48	0x60	TCA1_CMP0 TCA1_LCMP0	Normal: Timer/Counter Type A Compare 0 Interrupt Split: Timer/Counter Type A Low Compare 0 Interrupt			X	X
49	0x62	TCA1_CMP1 TCA1_LCMP1	Normal: Timer/Counter Type A Compare 1 Interrupt Split: Timer/Counter Type A Low Compare 1 Interrupt			X	X
50	0x64	TCA1_CMP2 TCA1_LCMP2	Normal: Timer/Counter Type A Compare 2 Interrupt Split: Timer/Counter Type A Low Compare 2 Interrupt			X	X
51	0x66	ZCD1_ZCD	Zero-Cross Interrupt			X	X
52	0x68	USART3_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt			X	X
53	0x6A	USART3_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt			X	X
54	0x6C	USART3_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt			X	X
55	0x6E	USART4_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt			X	X
56	0x70	USART4_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt			X	X
57	0x72	USART4_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt			X	X
58	0x74	PORTG_PORT	PORTG External Interrupt				X
59	0x76	ZCD2 _ZCD	Zero-Cross Interrupt				X
60	0x78	TCB4_INT	Timer Counter Type B Capture/Overflow Interrupt				X
61	0x7A	USART5_RXC	Universal Synchronous Asynchronous Receiver and Transmitter Receive Complete Interrupt				X
62	0x7C	USART5_DRE	Universal Synchronous Asynchronous Receiver and Transmitter Data Register Empty Interrupt				X
63	0x7E	USART5_TXC	Universal Synchronous Asynchronous Receiver and Transmitter Transmit Complete Interrupt				X