| .. _stm32-pm-suspend-to-ram-sample: |
| |
| STM32 PM Suspend to RAM |
| ####################### |
| |
| Overview |
| ******** |
| |
| This sample is a minimum application to demonstrate basic power management |
| behavior in a basic blinking LED set up using the :ref:`GPIO API <gpio_api>` in |
| low power context + ADC measurements and entropy. |
| |
| .. _stm32-pm-suspend-to-ram-sample-requirements: |
| |
| Requirements |
| ************ |
| |
| The board should support enabling PM. For a STM32 based target, it means that |
| it should support a clock source alternative to Cortex Systick that can be used |
| in core sleep states, as LPTIM (:dtcompatible:`st,stm32-lptim`). |
| The board shall have an RTC to use it during the standby mode as a replacement |
| for LPTIM (which is disabled). The board shall also have RAM retention to be |
| able to restore context after standby. |
| |
| Building and Running |
| ******************** |
| |
| Build and flash Blinky as follows, changing ``stm32wba55cg`` for your board: |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/boards/stm32/power_mgmt/suspend_to_ram |
| :board: stm32wba55cg |
| :goals: build flash |
| :compact: |
| |
| After flashing, the LED starts to blink. |
| |
| PM configurations |
| ***************** |
| |
| By default, :kconfig:option:`CONFIG_PM_DEVICE` and :kconfig:option:`CONFIG_PM_DEVICE_RUNTIME` |
| are enabled. |
