STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

RM0008
Interrupts and events
9 Interrupts and events
Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
High-density devices are STM32F101xx and STM32F103xx microcontrollers where the
Flash memory density ranges between 256 and 512 Kbytes.
Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
This Section applies to the whole STM32F10xxx family, unless otherwise specified.
9.1 Nested vectored interrupt controller (NVIC)
Features
●
●
●
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68 maskable interrupt channels (not including the 16 interrupt lines of Cortex-M3)
16 programmable priority levels (4 bits of interrupt priority are 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, which enables low latency
interrupt processing and efficient processing of late arriving interrupts.
All interrupts including the core exceptions are managed by the NVIC. For more information
on exceptions and NVIC programming see Chap 5 Exceptions & Chap 8 Nested Vectored
Interrupt Controller of the ARM Cortex-M3 Technical Reference Manual.
9.1.1 SysTick calibration value register
The SysTick calibration value is fixed to 9000, which gives a reference time base of 1 ms
with the SysTick clock set to 9 MHz (max HCLK/8).
9.1.2 Interrupt and exception vectors
Table 52 and Table 53 are the vector tables for connectivity line and other STM32F10xxx
devices, respectively.
Table 52.
Vector table for connectivity line devices
Position
Priority
Type of
priority
Acronym Description Address
- - - Reserved 0x0000_0000
-3 fixed Reset Reset 0x0000_0004
-2 fixed NMI
Non maskable interrupt. The RCC
Clock Security System (CSS) is
linked to the NMI vector.
0x0000_0008
Doc ID 13902 Rev 9 169/995