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.
| 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:
| 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 |