 Hello and welcome to this presentation of the STM32U5EXTI. The extended interrupts and event controller EXTI manages individual CPU and system wakeup through configurable event inputs. It provides wakeup requests to the power control and generates an interrupt request to the CPU NVIC and events to the CPU event input. The table provides the list of all the events supported by the STM32U5 that can wake up the system from stop 0, 1 and 2 modes. Unlike previous versions of EXTI, the STM32U5 no longer supports direct peripheral events which are generated by peripherals supporting interrupt requests. Peripherals with wakeup capability request, the AHB APB clock, and when the system clock is present, the peripheral generates an interrupt if enabled. This interrupt wakes up the device and is directly connected to NVIC. The EXTI is trust zone aware. The access to control and configuration bits of secure input events can be made secure and or privileged. When a non-secure master attempts to access a secure resource, the EXTI illegal access is reported to the global trust zone controller GTZC. Thank you for following this online training.