| .. _nrf-system-off-sample: |
| |
| nRF5x System Off demo |
| ##################### |
| |
| Overview |
| ******** |
| |
| This sample can be used for basic power measurement and as an example of |
| deep sleep on Nordic platforms. |
| |
| RAM Retention |
| ============= |
| |
| On nRF52 platforms this also can demonstrate RAM retention. By selecting |
| ``CONFIG_APP_RETENTION=y`` state related to number of boots, number of times |
| system off was entered, and total uptime since initial power-on are retained |
| in a checksummed data structure. The POWER peripheral is configured to keep |
| the containing RAM section powered while in system-off mode. |
| |
| Requirements |
| ************ |
| |
| This application uses nRF51 DK or nRF52 DK board for the demo. |
| |
| Sample Output |
| ============= |
| |
| nRF52 core output |
| ----------------- |
| |
| .. code-block:: console |
| |
| *** Booting Zephyr OS build v2.3.0-rc1-204-g5f2eb85f728d *** |
| |
| nrf52dk system off demo |
| Entering system off; press sw0 to restart |
