10.2 Interrupt Vector Mapping

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

An interrupt flag is set in the interrupt flag (<peripheral>.INTFLAGS) register of the peripheral 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. The interrupt request remains active until the interrupt flag is cleared. See the peripheral's interrupt flag (<peripheral>.INTFLAGS) register for details on how to clear interrupt flags.

Note: Interrupts must be enabled globally for interrupt requests to be generated.

Table 10-3. Interrupt Vector Mapping
Vector number	Program Address (word)	Peripheral Source (Name)	Description	28-pin	32-pin	48-pin
0	0x00	RESET		X	X	X
1	0x02	NMI	Non-Maskable interrupt available for: CRCSCAN CFD	X	X	X
2	0x04	BOD_VLM	Voltage Level Monitor	X	X	X
3	0x06	CLKCTRL_CFD	Clock failure	X	X	X
4	0x08	RTC_CNT	Overflow / compare match	X	X	X
5	0x0A	RTC_PIT	Periodic interrupt	X	X	X
6	0x0C	CCL_CCL	Configurable Custom Logic	X	X	X
7	0x0E	PORTA_PORT	External interrupt	X	X	X
8	0x10	TCA0_OVF	Overflow (normal mode)	X	X	X
8	0x10	TCA0_LUNF	Low underflow (split mode)	X	X	X
9	0x12	TCA0_HUNF	High underflow (split mode)	X	X	X
10	0x14	TCA0_CMP0	Compare channel 0 (normal mode)	X	X	X
10	0x14	TCA0_LCMP0	Low compare channel 0 (split mode)	X	X	X
11	0x16	TCA0_CMP1	Compare channel 1 (normal mode)	X	X	X
11	0x16	TCA0_LCMP1	Low compare channel 1 (split mode)	X	X	X
12	0x18	TCA0_CMP2	CMP0 - Compare channel 2 (normal mode)	X	X	X
12	0x18	TCA0_LCMP2	Low compare channel 2 (split mode)	X	X	X
13	0x1A	TCB0_INT	Capture/Overflow	X	X	X
14	0x1C	TCB1_INT	Capture/Overflow	X	X	X
15	0x1E	TWI0_TWIS	Client	X	X	X
16	0x20	TWI0_TWIM	Host	X	X	X
17	0x22	SPI0_INT	Serial Peripheral Interface 0	X	X	X
18	0x24	USART0_RXC	Receive complete	X	X	X
19	0x26	USART0_DRE	Data register empty	X	X	X
20	0x28	USART0_TXC	Transmit complete	X	X	X
21	0x2A	PORTD_PORT	External interrupt	X	X	X
22	0x2C	AC0_AC	Compare	X	X	X
23	0x2E	ADC0_ERROR	Error	X	X	X
24	0x30	ADC0_RESRDY	Result ready	X	X	X
25	0x32	ADC0_SAMPRDY	Sample ready	X	X	X
26	0x34	AC1_AC	Compare	X	X	X
27	0x36	PORTC_PORT	External interrupt	X	X	X
28	0x38	TCB2_INT	Capture/Overflow	X	X	X
29	0x3A	USART1_RXC	Receive complete	X	X	X
30	0x3C	USART1_DRE	Data register empty	X	X	X
31	0x3E	USART1_TXC	Transmit complete	X	X	X
32	0x40	PORTF_PORT	External interrupt	X	X	X
33	0x42	NVMCTRL_NVMREADY	EEPROM/Flash ready	X	X	X
34	0x44	USART2_RXC	Receive complete	X	X	X
35	0x46	USART2_DRE	Data register empty	X	X	X
36	0x48	USART2_TXC	Transmit complete	X	X	X
37	0x4A	TCB3_INT	Capture/Overflow	X	X	X
38	0x4C	TCA1_OVF	Overflow (normal mode)	X	X	X
38	0x4C	TCA1_LUNF	Low underflow (split mode)	X	X	X
39	0x4E	TCA1_HUNF	High underflow (split mode)	X	X	X
40	0x50	TCA1_CMP0	Compare channel 0 (normal mode)	X	X	X
40	0x50	TCA1_LCMP0	Low compare channel 0 (split mode)	X	X	X
41	0x52	TCA1_CMP1	Compare channel 1 (normal mode)	X	X	X
41	0x52	TCA1_LCMP1	Low compare channel 1 (split mode)	X	X	X
42	0x54	TCA1_CMP2	Compare channel 2 (normal mode)	X	X	X
42	0x54	TCA1_LCMP2	Low compare channel 2 (split mode)	X	X	X
43	0x56	PORTE_PORT	External interrupt			X
44	0x58	PORTB_PORT	External interrupt			X