39 lines
1017 B
ReStructuredText
39 lines
1017 B
ReStructuredText
.. zephyr:code-sample:: nrf_system_off
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:name: System Off
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:relevant-api: sys_poweroff subsys_pm_device
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Use deep sleep on Nordic platforms.
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Overview
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********
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This sample can be used for basic power measurement and as an example of
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deep sleep on Nordic platforms.
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RAM Retention
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=============
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This sample can also can demonstrate RAM retention. By selecting
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``CONFIG_APP_USE_NRF_RETENTION=y`` or ``CONFIG_APP_USE_RETAINED_MEM=y``
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state related to number of boots, number of times system off was entered,
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and total uptime since initial power-on are retained in a checksummed data structure.
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RAM is configured to keep the containing section powered while in system-off mode.
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Requirements
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************
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This application uses nRF51 DK, nRF52 DK or nRF54L15 DK board for the demo.
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Sample Output
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=============
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nRF52 core output
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-----------------
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.. code-block:: console
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*** Booting Zephyr OS build v2.3.0-rc1-204-g5f2eb85f728d ***
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nrf52dk system off demo
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Entering system off; press sw0 to restart
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