18. Nested vectored interrupt controller (NVIC)

The NVIC is an Arm Cortex embedded interrupt controller that supports low latency interrupt processing.

18.1 NVIC main features

• 70 maskable interrupt channels (not including the 16 Cortex-M33 with FPU interrupt lines)
• 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 non-secure states.

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

18.2 Interrupt and exception vectors

The grey rows in Table 135 indicate vectors without specific position.

Table 135. Vector table

Position	Priority	Type of priority	Acronym	Description	Address
-	-	-	-	Reserved	0x0000 0000
-	-4	Fixed	Reset	Reset	0x0000 0004
-14	-2	Fixed	NMI	Non maskable interrupt. - RCC clock security system (HSECSS) - FLASH ECC double error detection - RAMCFG SRAM2 parity error	0x0000 0008
-13	-3	Fixed	Secure HardFault	Secure hard fault when AIRCR.BFHFNMINS = 1	0x0000 000C
	-1	Fixed	Secure HardFault	Secure hard fault when AIRCR.BFHFNMINS = 0
	-1	Fixed	Non-secure HardFault	Non-secure 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

Table 135. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
-	-	-	-	Reserved	0x0000 0020 - 0x0000 0028
-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	WWDG	Window watchdog interrupt	0x0000 0040
1	9	Settable	PVD	Power voltage monitor	0x0000 0044
2	10	Settable	RTC	RTC non-secure global interrupts	0x0000 0048
3	11	Settable	RTC_S ⁽¹⁾	RTC secure global interrupts	0x0000 004C
4	12	Settable	TAMP	Tamper global interrupts	0x0000 0050
5	13	Settable	RAMCFG	RAM configuration global interrupt	0x0000 0054
6	14	Settable	FLASH	Flash interface non-secure global interrupt Flash ECC single error correction interrupt	0x0000 0058
7	15	Settable	FLASH_S ⁽¹⁾	Flash interface secure global interrupt	0x0000 005C
8	16	Settable	GTZC_TZIC ⁽¹⁾	GTZC_TZIC global interrupt	0x0000 0060
9	17	Settable	RCC	RCC non-secure global interrupt	0x0000 0064
10	18	Settable	RCC_S ⁽¹⁾	RCC secure global interrupt	0x0000 0068
11	19	Settable	EXTI0	EXTI line0 interrupt	0x0000 006C
12	20	Settable	EXTI1	EXTI line1 interrupt	0x0000 0070
13	21	Settable	EXTI2	EXTI line2 interrupt	0x0000 0074
14	22	Settable	EXTI3	EXTI line3 interrupt	0x0000 0078
15	23	Settable	EXTI4	EXTI line4 interrupt	0x0000 007C
16	24	Settable	EXTI5	EXTI line5 interrupt	0x0000 0080
17	25	Settable	EXTI6	EXTI line6 interrupt	0x0000 0084
18	26	Settable	EXTI7	EXTI line7 interrupt	0x0000 0088
19	27	Settable	EXTI8	EXTI line8 interrupt	0x0000 008C
20	28	Settable	EXTI9	EXTI line9 interrupt	0x0000 0090
21	29	Settable	EXTI10 ⁽¹⁾	EXTI line10 interrupt	0x0000 0094
22	30	Settable	EXTI11 ⁽¹⁾	EXTI line11 interrupt	0x0000 0098
23	31	Settable	EXTI12	EXTI line12 interrupt	0x0000 009C
24	32	Settable	EXTI13	EXTI line13 interrupt	0x0000 00A0

Table 135. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
25	33	Settable	EXTI14	EXTI line14 interrupt	0x0000 00A4
26	34	Settable	EXTI15	EXTI line15 interrupt	0x0000 00A8
27	35	Settable	IWDG	Independent watchdog interrupt	0x0000 00AC
28	36	Settable	SAES ⁽¹⁾	Secure AES interrupt	0x0000 00B0
29	37	Settable	GPDMA1_CH0	GPDMA1 channel 0 global interrupt	0x0000 00B4
30	38	Settable	GPDMA1_CH1	GPDMA1 channel 1 global interrupt	0x0000 00B8
31	39	Settable	GPDMA1_CH2	GPDMA1 channel 2 global interrupt	0x0000 00BC
32	40	Settable	GPDMA1_CH3	GPDMA1 channel 3 global interrupt	0x0000 00C0
33	41	Settable	GPDMA1_CH4	GPDMA1 channel 4 global interrupt	0x0000 00C4
34	42	Settable	GPDMA1_CH5	GPDMA1 channel 5 global interrupt	0x0000 00C8
35	43	Settable	GPDMA1_CH6	GPDMA1 channel 6 global interrupt	0x0000 00CC
36	44	Settable	GPDMA1_CH7	GPDMA1 channel 7 global interrupt	0x0000 00D0
37	45	Settable	TIM1_BRK TIM1_TERR TIM1_ERR	TIM1 break TIM1 transition error TIM1 index error	0x0000 00D4
38	46	Settable	TIM1_UP	TIM1 update	0x0000 00D8
39	47	Settable	TIM1_TRG_COM TIM1_DIR TIM1_IDX	TIM1 trigger and commutation TIM1 direction change interrupt TIM1 index	0x0000 00DC
40	48	Settable	TIM1_CC	TIM1 capture compare interrupt	0x0000 00E0
41	49	Settable	TIM2	TIM2 global interrupt	0x0000 00E4
42	50	Settable	TIM3 ⁽¹⁾	TIM3 global interrupt	0x0000 00E8
43	51	Settable	I2C1_EV ⁽¹⁾	I2C1 event interrupt	0x0000 00EC
44	52	Settable	I2C1_ER ⁽¹⁾	I2C1 error interrupt	0x0000 00F0
45	53	Settable	SPI1 ⁽¹⁾	SPI1 global interrupt	0x0000 00F4
46	54	Settable	USART1	USART1 global interrupt	0x0000 00F8
47	55	Settable	USART2 ⁽¹⁾	USART2 global interrupt	0x0000 00FC
48	56	Settable	LPUART1	LPUART1 global interrupt	0x0000 0100
49	57	Settable	LPTIM1	LPTIM1 global interrupt	0x0000 0104
50	58	Settable	LPTIM2 ⁽¹⁾	LPTIM2 global interrupt	0x0000 0108
51	59	Settable	TIM16	TIM16 global interrupt	0x0000 010C
52	60	Settable	TIM17 ⁽¹⁾	TIM17 global interrupt	0x0000 0110
53	61	Settable	COMP ⁽²⁾	COMP1/COMP2 interrupt	0x0000 0114
54	62	Settable	I2C3_EV	I2C3 event interrupt	0x0000 0118

Table 135. Vector table (continued)

Position	Priority	Type of priority	Acronym	Description	Address
55	63	Settable	I2C3_ER	I2C3 error interrupt	0x0000 011C
56	64	Settable	SAI1 ⁽²⁾	SAI1 global interrupt	0x0000 0120
57	65	Settable	TSC	TSC global interrupt	0x0000 0124
58	66	Settable	AES	AES global interrupt	0x0000 0128
59	67	Settable	RNG	RNG global interrupt	0x0000 012C
60	68	Settable	FPU	Floating point interrupt	0x0000 0130
61	69	Settable	HASH	HASH interrupt	0x0000 0134
62	70	Settable	PKA	PKA global interrupt	0x0000 0138
63	71	Settable	SPI3	SPI3 global interrupt	0x0000 013C
64	72	Settable	ICACHE	Instruction cache global interrupt	0x0000 0140
65	73	Settable	ADC4	ADC4 global interrupt	0x0000 0144
66	74	Settable	RADIO	2.4 GHz RADIO global interrupt	0x0000 0148
67	75	Settable	WKUP	PWR non-secure global WKUP pin interrupt	0x0000 014C
68	76	Settable	HSEM	HSEM non-secure interrupt	0x0000 0150
69	77	Settable	HSEM_S ⁽¹⁾	HSEM secure interrupt	0x0000 0154
70	78	Settable	WKUP_S ⁽¹⁾	PWR secure WKUP pin interrupt	0x0000 0158
71	79	Settable	RCC_AUDIO ⁽²⁾	RCC audio synchronization interrupt	0x0000 015C

1. Available only on STM32WBA52/54/55xx devices.

2. Available only on STM32WBA54/55xx devices.