Run and low power modes

AN3147

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DocID17035 Rev 3

4.6.2

Exiting Wait for interrupt mode

When an internal or external interrupt request occurs, the CPU wakes up from Wait mode

and resumes processing.

The following list gives examples of peripherals or features with interrupts having exit-from-

wait capability:



I2C



USART



SPI



ADC



Comparator



AWU/RTC



External interrupt



Timers



Clock controller (clock switch execution)

Refer to the STM8L/STM8AL reference manuals for more details. Refer to the

STM8L/STM8AL datasheets for the availability of the above peripherals and features on

your devices.

4.6.3

Exiting Wait for event mode

When an internal or external event request occurs, the CPU wakes up from Wait mode and

resumes processing.

The following list gives examples of peripherals or features with events having exit-from-wait

capability:



I2C



USART



SPI



ADC



Comparator



External interrupt



Timers

If an interrupt occurs during Wait for event mode, the related interrupt service routine is

executed. After this routine, the MCU goes back to Wait for event mode.

Refer to the STM8L/STM8AL reference manuals for more details. Refer to the

STM8L/STM8AL datasheets for the availability of the above peripherals and features on

your devices.