Main Features; Block Diagram; Wakeup Event Management; Figure 20. External Interrupt/Event Controller Block Diagram - ST STM32F101 series Reference Manual

RM0008
10.2.1

Main features

The EXTI controller main features are the following:
•
Independent trigger and mask on each interrupt/event line
•
Dedicated status bit for each interrupt line
•
Generation of up to 20 software event/interrupt requests
•
Detection of external signal with pulse width lower than APB2 clock period. Refer to the
electrical characteristics section of the datasheet for details on this parameter.
10.2.2

Block diagram

The block diagram is shown in
10.2.3

Wakeup event management

The STM32F10xxx is able to handle external or internal events in order to wake up the core
(WFE). The wakeup event can be generated either by:
•
enabling an interrupt in the peripheral control register but not in the NVIC, and enabling
the SEVONPEND bit in the Cortex
Figure

Figure 20. External interrupt/event controller block diagram

DocID13902 Rev 15
20.
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-M3 System Control register. When the MCU
Interrupts and events
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