17. Nested vectored interrupt controller (NVIC)

The NVIC is a Arm ^®Cortex ^®embedded interrupt controller that supports low-latency interrupt processing.

17.1 NVIC main features

• 16 programmable priority levels (4 bits of interrupt priority used)
• Low-latency exception and interrupt handling
• Power management control
• Implementation of system control registers

The NVIC and the processor core interface are closely coupled, enabling low-latency interrupt processing and efficient processing of late arriving interrupts.

The NVIC registers are banked across secure and nonsecure states.

All interrupts including the core exceptions are managed by the NVIC.

17.2 Interrupt and exception vectors

The grey rows in Table 140 indicate vectors without specific position.

Table 140. Vector table

Position	Priority	Type of priority	Acronym	Description	Address
-	-	-	-	Reserved	0x0000 0000
-	-4	Fixed	Reset	Reset	0x0000 0004
-14	-2	Fixed	NMI	Nonmaskable interrupt. - RCC clock security system (HSECSS) - FLASH ECC double error detection - RAMCFG SRAM2 parity error	0x0000 0008
-13	-1	Fixed	Secure HardFault	Hard fault when AIRCR.BFHFNMINS = 1	0x0000 000C
	-1	Fixed		Hard fault when AIRCR.BFHFNMINS = 0
	-1	Fixed	Nonsecure HardFault	Hard fault. All classes of fault
-12	0	Settable	MemManage	Memory management	0x0000 0010
-11	1	Settable	BusFault	Pre-fetch fault, memory access fault	0x0000 0014
-10	2	Settable	UsageFault	Undefined instruction or illegal state	0x0000 0018
-9	3	Settable	SecureFault	Secure fault	0x0000 001C
-	-	-	-	Reserved	0x0000 0020 - 0x0000 0028

Table 140. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
-5	4	Settable	SVCall	System service call via SWI instruction	0x0000 002C
-4	5	Settable	Debug monitor	Debug monitor	0x0000 0030
-	-	-	-	Reserved	0x0000 0034
-2	6	Settable	PendSV	Pendable request for system service	0x0000 0038
-1	7	Settable	SysTick	System tick timer	0x0000 003C
0	8	Settable	-	Reserved	0x0000 0040
1	9	Settable	EXTI 16 (PVD)	EXTI line 16 interrupt, Power voltage monitor	0x0000 0044
2	10	Settable	RTC	RTC nonsecure global interrupts	0x0000 0048
3	11	Settable	RTC_S	RTC secure global interrupts	0x0000 004C
4	12	Settable	TAMP	Tamper global interrupt	0x0000 0050
5	13	Settable	RAMCFG	RAM configuration global interrupt	0x0000 0054
6	14	Settable	FLASH	Flash nonsecure interface global interrupt Flash ECC single error correction interrupt	0x0000 0058
7	15	Settable	FLASH_S	Flash secure interface global interrupt	0x0000 005C
8	16	Settable	GTZC1_TZIC	GTZC1_TZIC global interrupt	0x0000 0060
9	17	Settable	RCC	RCC nonsecure global interrupt	0x0000 0064
10	18	Settable	RCC_S	RCC secure global interrupt	0x0000 0068
11	19	Settable	EXTI0 (GPIO)	EXTI line- 0 interrupt, GPIO 0	0x0000 006C
12	20	Settable	EXTI1 (GPIO)	EXTI line 1 interrupt, GPIO 1	0x0000 0070
13	21	Settable	EXTI2 (GPIO)	EXTI line 2 interrupt, GPIO 2	0x0000 0074
14	22	Settable	EXTI3 (GPIO)	EXTI line3 interrupt , GPIO 3	0x0000 0078
15	23	Settable	EXTI4 (GPIO)	EXTI line 4 interrupt, GPIO 4	0x0000 007C
16	24	Settable	EXTI5 (GPIO)	EXTI line 5 interrupt, GPIO 5	0x0000 0080
17	25	Settable	EXTI6 (GPIO)	EXTI line 6 interrupt, GPIO 6	0x0000 0084
18	26	Settable	EXTI7 (GPIO)	EXTI line 7 interrupt, GPIO 7	0x0000 0088
19	27	Settable	EXTI8 (GPIO)	EXTI line 8 interrupt, GPIO 8	0x0000 008C
20	28	Settable	EXTI9 (GPIO)	EXTI line 9 interrupt, GPIO 9	0x0000 0090
21	29	Settable	EXTI10 (GPIO)	EXTI line 10 interrupt, GPIO 10	0x0000 0094
22	30	Settable	EXTI11 (GPIO)	EXTI line 11 interrupt, GPIO 11	0x0000 0098
23	31	Settable	EXTI12 (GPIO)	EXTI line 12 interrupt, GPIO 12	0x0000 009C
24	32	Settable	EXTI13 (GPIO)	EXTI line 13 interrupt, GPIO 13	0x0000 00A0
25	33	Settable	EXTI14 (GPIO)	EXTI line 14 interrupt, GPIO 14	0x0000 00A4
26	34	Settable	EXTI15 (GPIO)	EXTI line 15 interrupt, GPIO 15	0x0000 00A8

Table 140. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
27	35	Settable	IWDG	Independent watchdog interrupt	0x0000 00AC
28	36	Settable	LPDMA1_CH0	LPDMA1 channel 0 global interrupt	0x0000 00B0
29	37	Settable	LPDMA1_CH1	LPDMA1 channel 1 global interrupt	0x0000 00B4
30	38	Settable	LPDMA1_CH2	LPDMA1 channel 2 global interrupt	0x0000 00B8
31	39	Settable	LPDMA1_CH3	LPDMA1 channel 3 global interrupt	0x0000 00BC
32	40	Settable	LPDMA1_CH4	LPDMA1 channel 4 global interrupt	0x0000 00C0
33	41	Settable	LPDMA1_CH5	LPDMA1 channel 5 global interrupt	0x0000 00C4
34	42	Settable	LPDMA1_CH6	LPDMA1 channel 6 global interrupt	0x0000 00C8
35	43	Settable	LPDMA1_CH7	LPDMA1 channel 7 global interrupt	0x0000 00CC
36	44	Settable	OTFDEC1 ⁽¹⁾	OTFDEC1 global interrupt	0x0000 00D0
37	45	Settable	-	Reserved	0x0000 00D4
38	46	Settable	-	Reserved	0x0000 00D8
39	47	Settable	-	Reserved	0x0000 00DC
40	48	Settable	TIM2	TIM2 global interrupt	0x0000 00E0
41	49	Settable	I2C1_EV	I2C1 event interrupt	0x0000 00E4
42	50	Settable	I2C1_ER	I2C1 error interrupt	0x0000 00E8
43	51	Settable	USART1	USART1 global interrupt	0x0000 00EC
44	52	Settable	LPUART1	LPUART1 global interrupt	0x0000 00F0
45	53	Settable	LPTIM1	LPTIM1 global interrupt	0x0000 00F4
46	54	Settable	LPTIM2	LPTIM2 global interrupt	0x0000 00F8
47	55	Settable	TIM16	TIM16 global interrupt	0x0000 00FC
48	56	Settable	TIM17	TIM17 global interrupt	0x0000 0100
49	57	Settable	I2C3_EV	I2C3 event interrupt	0x0000 0104
50	58	Settable	I2C3_ER	I2C3 error interrupt	0x0000 0108
51	59	Settable	SAI1	SAI global interrupt	0x0000 010C
52	60	Settable	AES	AES global interrupt	0x0000 0110
53	61	Settable	RNG	RNG global interrupt	0x0000 0114
54	62	Settable	FPU	Floating point interrupt	0x0000 0118
55	63	Settable	HASH	HASH global interrupt	0x0000 011C
56	64	Settable	PKA	PKA global interrupt	0x0000 0120
57	65	Settable	SPI3	SPI3 global interrupt	0x0000 0124
58	66	Settable	ICACHE	ICACHE global interrupt	0x0000 0128
59	67	Settable	ADC4	ADC4 global interrupt	0x0000 012C

Table 140. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
60	68	Settable	RADIO	2.4 GHz RADIO global interrupt	0x0000 0130
61	69	Settable	WKUP	PWR nonsecure global WKUP pin interrupt	0x0000 0134
62	70	Settable	WKUP_S	PWR secure global WKUP pin interrupt	0x0000 0138
63	71	Settable	RCC_AUDIOSY NC	RCC audio synchronization interrupt	0x0000 013C
64	72	Settable	USB ⁽¹⁾	USB global interrupt	0x0000 0140
65	73	Settable	XSPI1 ⁽¹⁾	XSPI1 global interrupt	0x0000 0144

1. Only available on STM32WBA25xx devices