Wake-up sources and triggers from low-power modes in STM32F4
While low-power modes help conserve energy, ensuring that a microcontroller can wake up promptly when needed is equally important. The STM32F4 microcontroller series provides a variety of wake-up sources and triggers to handle this effectively. In this section, we’ll explore these wake-up sources, how they function, and their practical applications.
Understanding wake-up sources
Wake-up sources are mechanisms that bring a microcontroller out of a low-power state. The STM32F4 offers several types of wake-up sources, each suited for different scenarios. These include external interrupts, RTC alarms, watchdog timers, and various internal events. By understanding these triggers, we can design systems that balance power efficiency with responsiveness.
The wake-up sources can be grouped as follows:
- External interrupts
- Real-Time Clock (RTC) alarms
- Internal events
Let’s delve into each...
