Nested Vectored Interrupt Controller (Nvic); Introduction; Table 24. Exception Types - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230
10

Nested Vectored Interrupt Controller (NVIC)

Introduction

In order to reduce the latency and increase the interrupt processing efficiency, a tightly coupled
integrated section, which is named as Nested Vectored Interrupt Controller (NVIC) is provided
by the Cortex
®
which include functions such as the enable/disable control, priority, clear-pending, active status
report, software trigger and vector table remapping. Refer to the Technical Reference Manual of
Cortex ® -M0+ for more details.
Additionally, an integrated simple, 24-bit down count timer (SysTick) is provided by the
Cortex -M0+ to be used as a tick timer for the Real Timer Operation System (RTOS) or as a
®
simple counter. The SysTick counts down from the reloaded value and generates a system interrupt
when it reached zero. The accompanying table lists the 16 system exceptions types and a variety of
peripheral interrupts.

Table 24. Exception Types

Interrupt Exception Exception
Number Number
— 0 —
— 1 Reset
-14 2 NMI
-13 3 Hard Fault
— 4-10 Reserved
-5 11 SVCall
— 12-13 Reserved
-2 14 PendSV
-1 15 SysTick
0 16 LVD
1 17 Reserved
2 18 FMC
3 19 WKUP
4 20 EXTI0 ~ 1
5 21 EXTI2 ~ 3
6 22 EXTI4 ~ 15 Configurable
7 23 Reserved
8 24 ADC
9 25 Reserved
10 26 Reserved
11 27 Reserved
12 28 GPTM
13 29 SCTM0
14 30 SCTM1
Rev. 1.10
-M0+. The NVIC controls the system exceptions and the peripheral interrupt
Vector
Priority
type Address
— 0x000
-3 (Highest) 0x004
-2 0x008
-1 0x00C
— —
Configurable (1) 0x02C
— —
Configurable (1) 0x038
Configurable (1) 0x03C
Configurable (2) 0x040
— 0x044
Configurable (2) 0x048
Configurable (2) 0x04C
Configurable (2) 0x050
Configurable 0x054
(2)
(2) 0x058
— 0x05C
Configurable (2) 0x060
— 0x064
— 0x068
— 0x06C
Configurable (2) 0x070
Configurable (2) 0x074
Configurable (2) 0x078
137 of 366
Description
Initial Stack Point value
Reset
Non-Maskable Interrupt. The clock stuck
interrupt signal (clock monitor function
provided by Clock Control Unit) is connected
to the NMI input
All fault classes
—
SVC instruction System service call
—
System Service Pendable request
SysTick timer decremented to zero
Low voltage detection interrupt
—
FMC global interrupt
EXTI event wakeup or external WAKEUP pin
interrupt
EXTI Line 0 & 1 interrupt
EXTI Line 2 & 3 interrupt
EXTI Line 4 ~ 15 interrupt
—
ADC global interrupt
—
—
—
GPTM global interrupt
SCTM0 global interrupt
SCTM1 global interrupt
November 09, 2018